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Weblinks

Useful external links

Comcast portals:


Comcast Remotes Device Codes -- includes online code finder and links to printable PDF manuals
http://customer.comcast.com/remotes/


Legacy (not X1) Comcast Cable Box Manuals -- has most major boxes currently widely used.
http://customer.comcast.com/help-and-support/cable-tv/cable-box-user-manuals/


Instructions for setting resolution on newer SA/Cisco cable boxes: https://forums.xfinity.com/t5/TV-Archive/Change-cable-box-1080i-to-1080p/m-p/1330319/highlight/true#M284673


Comcast Digital Migration Information
http://customer.comcast.com/help-and-support/cable-tv/who-is-affected-by-digital-migration/


Comcast Encryption of Limited Basic Information
http://customer.comcast.com/help-and-support/cable-tv/limited-basic-encryption/


Comcast Customer Forums
http://forums.comcast.com/


Comcast direct hotline for X1 customer support: 1-877-896-8678


 


Other websites:


How to use a Motorola DVR: http://en.wikibooks.org/wiki/How_to_use_a_Motorola_DVR


While a little out of date this has solid information and plenty of tips and tricks for setup and configuration of Motorola set-top boxes. This includes how to access the hidden setup menu to set HD resolutions and digital audio preferences. As well as an extensive discussion on the Comcast silver remotes and custom programing them for volume locks, 30-second skip, and more.


Comcast HDTV section on avsforum.com:
http://www.avsforum.com/avs-vb/showthread.php?t=424081


AVS Forum contains discussion on many topics for the A/V enthusiast, like TV programming, detailed discussions on hardware(cable boxes, DVRs). This is the main Comcast HDTV page on the avsforum.


Equipment

All about X1

General Information


X1 is Comcast's next generation guide software and hardware platform. It has nothing to do with any of the previous legacy guides such as the "blue and white guide" (i-Guide) or the "beige guide" (SARA).


You can see the new user interface and features here: http://www.xfinity.com/x1



Guide Software


X1 is a totally new guide software. It leverages newer open source cloud based technologies such as HTML5. 

The X1 Guide is also referred to as "The X1 Experience".

Somewhat confusingly "X1" is also the common name used for Comcast's first DVR that implements the X1 Guide software. So for the purposes of clarity in this FAQ we call the guide software the "X1 Guide" and the DVR the "X1 DVR."

The X1 DVR and Guide combination was called codename "Xcalibur" during testing. The guide had also been referred to as "On Screen Guide 3.0", this terminology typically was only used in Scientific Atlanta/Cisco markets.

In 2014 there was news around a codename "X2" software, this is an internal code name only, the end result was still branded under the "X1" umbrella. X2 was a fairly major revision of the first generation X1 software, the X2 guide features an overhauled user interface, a recommendations engine, voice control, and cloud DVR storage, and other general user interface enhancements and refinements. As of mid-2014, the previously codenamed "X2" features/interface is now the shipping version of the X1 experience.


To check the X1 Platform software version info, one way is to select in the menu Xfinity -> the "Gear" icon (Settings) -> About



X1 DVR with Cloud Technology


The Cloud DVR option offers 500GB of space. It is an extra storage space that recordings must be explicitly copied to. The cloud storage space is also available to the tunerless Xi3 boxes since they have no local storage of their own. Recordings put into the cloud will then be made available to be "checked out" (downloaded) to a mobile device.

Due to content rights issues, Live TV streaming only works when on your home Wi-Fi network.

General X1 Cloud Technology FAQs: »customer.comcast.com/hel ··· ral-faqs

Recording and Playback Features FAQs: »customer.comcast.com/hel ··· ack-faqs

Download Feature FAQs: »customer.comcast.com/hel ··· oad-faqs

Live TV Streaming on the X1 Platform FAQs: »customer.comcast.com/hel ··· treaming


X1 tips and tricks

To access the hidden diagnostics:

1. Hold down the Exit button on the remote for more than five seconds.
2. Press the Down arrow twice.
3. Press the 2 button

Note: you won't see any feedback that these steps are working, just move through the steps quickly. If it works you'll be presented with a white diagnostic screen. It may take a few tries to get the feel for the timing of activating the menu.


Click for full size

Example of the diagnostic screen from an XG1-A (click to enlarge)


Check the signal strength of a cable box: 

From the hidden diagnostics menu (see above for instructions on getting into the menu).

Once in the diagnostics menu, select System and then arrow down to DOCSIS, wait a few seconds for the information to populate.


Downstream Received Power should be between 8 and -8
Downstream SNR should be over 35
Upstream Power should be between 35 and 51


Check if channel is IP or QAM

X1 now has a special key combination to check the bitrate of the newer IP delivered channels. 

Quickly press BBBB248 (that's 4x B key and 2-4-8) on the remote and it will show the bitrate. If it is 0.0mbps, it is being delivered over QAM. Any actual number shown then it is IP delivery.

Note: You won't see any feedback that these steps are working, just move through the steps quickly. Pressing B opens the Accessibility Settings, so just exit out of it and look for the overlay in the top right corner with the bitrate.

To remove the bitrate overlay you can repeat the key combo, or just change the channel.


Change the page up/down buttons from 5 minute skip to 30 second skip:

Unlike the old legacy boxes and remotes, on the X1 platform this is a hidden feature of the X1 software on the cable box, not the remote itself. This code alters how the X1 software treats the page up/down function, so the remote itself doesn't change.

This sequence is a special X1 guide code to activate the hidden feature of 30 second skips.

EXIT EXIT EXIT 0 0 3 0

Note: you won't see any feedback that these steps are working (when you get to the step of entering the digits it may look like you're just entering a channel number on screen), just move through the steps quickly. And then test the page up/down buttons on a recording, or you can try it on live TV if you have a DVR, to see if it took effect.


Enable new features being tested through Comcast Labs menu:

»www.xfinity.com/support/ ··· ast-labs



Hardware


Much like the "RNG" designation used for legacy iGuide digital cable boxes there are different levels of "X" designations being used for different levels of features and boxes can come from a variety of vendors. These boxes are based on Comcast's new Reference Design Kit (RDK). Unlike previous cable boxes, the RDK made boxes have a common physical design standard, so boxes from different vendors will now look nearly identical.


Remotes


  • Early deployment of X1 set-top boxes came with the XR2 remote control (Version R2 or newer). The XR2 can utilize RF communication with compatible cable boxes, this is a more dependable way to communicate which does not require line-of-sight. It also supports standard IR remote communication for the controlling of your TV and audio equipment.
    The online user guide for the remote is available here:
    https://www.xfinity.com/support/articles/x1-get-to-know-the-xr2-and-xr5-remote
    Click for full size

  • A newer deluxe remote is now shipping as the standard (no voice) remote, designated the XR5v3. It is the same basic remote as the XR11 (below) however it does not have voice command support. It includes a 3-second backlight that will activate automatically when picked up.
    Click for full size

  • The standard voice remote is the XR11, it includes a microphone and the ability to send voice commands to the cable box it is paired with. Much like Google Now or Apple Siri, it processes the voice commands on Comcast's servers. The XR11's advanced features are not compatible with RNG150N boxes. The user manual can be found here: https://www.xfinity.com/~/media/DA2A42AEDCA241778354739D021381E8.ashx


  • The newest voice remote (late-2017), called the XR15 it is an eventual replacement for the XR11. It features new styling, a somewhat smaller size, and a revamped layout of buttons. The XR15 removes the Setup button used to setup control of your TV and/or A/V receiver. Setup is now a key combination by pressing and holding the Xfinity and Mute buttons together for five seconds until the remote light at the top changes from red to green.
    https://www.xfinity.com/support/articles/get-to-know-xr11-remote

    Click for full size



    Cable Boxes

    XG1 DVR Gateway

    XG1 class DVRs have 6-tuners. The earliest Pace XG1 (Pace XG1v1) can only utilize 5-tuners.

    XG1 hardware also includes the ability to transcode two streams of video for sending live TV over Wi-Fi to supported mobile devices. They can also utilize RF communication with the XR2/XR5/XR11 remotes, so line-of-sight to control the XG1 is not necessary.

    NOTE: Currently the eSATA port is not enabled. Comcast is more interested in expanded storage via their cloud enabled technology, than worrying about local storage.


    The initial batches of the "X1 DVR" were made by Pace. This had been known by the codenames "Parker" and "Spectrum" while under beta testing.
    Technically the box is called the "Pace XG1". The designation of "XG1-P" and "PX001ANx" (x is either an M or a C depending on the region) or similar code, depending on hardware revision, can be found on the FCC label.


    There are three known revisions of the Pace hardware:

    The earliest models (PX001ANx) had a green light around the power button and are subject to issues including audio dropouts and surround sound falling back to stereo.


    Later models (PX012ANx) have a blue light around the power button and work well.


    The latest model (PX013ANx) is similar to the second revision, but has no component video output.


    NOTE: The Pace version 1 and version 2 models have component video output (for legacy analog HD output) in addition to HDMI.

    Click for full size


    ARRIS-Motorola was the second announced provider of XG1 hardware. It has a model designation of "XG1-A" ("A" for ARRIS-Motorola) in small text on the bottom right of the front of the device. It is also identified as "MX011ANM" or "MX011BNM" and "ACQ-XG1" on the FCC label. It may have been a customized variant of the DCX3600 series. Announced in June 2013, it became widely available to customers in February 2014. Press Release

    There is a slightly newer version 3 box, model AX013AN, what has changed is unknown.

    NOTE: The Arris models do not have component video output, only HDMI. 

    Click for full size



    XG2 Gateway

    This is a second generation box, which became commonly available in 2016. The XG2 is a fully fledged standalone cable box with 4 tuners. Like other second generation boxes it supports the advanced X11/X15 RF remote controls with voice control.

    Unlike the XG1, this box does not have local storage for DVR recordings. It is a cloud DVR-only box. There is an internal SD card slot that includes a special Xfinity certified memory card for use as a live TV buffer, making it possible to pause live TV for short period of time.

    The XG2 is used for new X1 customers who don't want a DVR. It can also be used as a secondary box where an Xi3 is unsuitable.

    Cisco (XG2v2-C), Samsung (XG2v2-S), and Pace (XG2v2-P) produced XG2 models.

    As of 2021 only the Pace XG2v2 is being updated with new features by Comcast. The XG2 platform is now showing its age and generally should be avoided.

    Click for full size

    XG1v4 DVR Gateway

    The XG1v4 (sometimes also called an XG4) is a brand new gateway made by Arris (model: AX014ANM) and is now available in many markets. The XG1v4 is a next generation DVR with 6 tuners and 500GB hard drive. Like other later generation boxes it supports the advanced X11/X15 RF remote controls with voice control. 

    The biggest new feature is the ability to support HDR and 4k UltraHD video. 

    In early 2018 the only Comcast provided source of 4k and HDR video is from the recent 2018 Winter Olympics, there is a special portal for it OnDemand.

    As of late-April 2018, the Netflix app supports 4k and HDR. The YouTube app supports 4k, but not HDR.

    Also new is the ability to pair a Bluetooth speaker or headphones to the cable box.

    Click for full size

    http://www.multichannel.com/blog/bauminator/comcast-starts-deploy-4khdr-x1-box/413009

    http://forums.xfinity.com/t5/X1/XG1v4-TV-Box/m-p/2907630


    Pace and Samsung RNG150N client

    The secondary boxes that were typically used with X1 DVR deployments in the early years of the X1 project were a special build of a Pace RNG150N (known model numbers: "PR150BNM X1" and "PR150BNC"). The RNG150's do not support RF remote control, nor can they run the extra advanced X1 apps. Some technical info is available from this press release here.

    Click for full size


    In the 2H of 2014 Comcast started deploying Samsung RNG150N (model: SR150BNM) in some regions.

    The RNG150N is an older/slower platform that was re-purposed for X1 uses. It can only run the basic X1 experience. Until a few years ago, it was the default secondary box for X1 installs, customers may ask to have them exchanged for a newer box like an XiD or Xi5.

    As of 2021, due to their very limited capabilities RNG150 are generally no longer given out to X1 customers.


    Xi3 IP-only client

    Announced in 2013, the Xi3 were very small (similar to the size of a DTA) but powerful second generation X1 hardware. They were made for Comcast by a variety of vendors, including: Pace, ARRIS-Motorola, Humax, and Technicolor.

    These boxes are client-only, meaning that they are tunerless. They rely totally on the the main gateway (an XG1 or XG2) and use one of the gateway's tuners to do all live TV functions. The Xi3 also has an internal SD card slot that includes a special Xfinity certified memory card for use as a live TV buffer, unlike the RNG150N clients, making it possible to pause the local live TV stream for short period of time.

    Click for full size

    An early Xi3 design

    Click for full size

    Final Xi3 design


    Since the Xi3 are quite a bit more powerful than the RNG150N's they can also handle running the full X1 experience with apps. The Xi3 supports the advanced X11 RF remote control.


    More information is available in this PDF:

    Xi3DeviceInfo.pdf
    55,822 bytes

    NOTE: The Xi3 was fairly quickly replaced by the more universal XiD box below.


    XiD IP-only client

    In late-2015 Comcast started to deploy another model in the Xi3 family, that is something of a "universal" box. Depending on the firmware it can be used as an HD-DTA for legacy customers or it can be an IP-only Xi3-type device for X1 customers. When used in "Xi" mode (X1 client mode) it has all the same functionality as the Xi3. Unlike an Xi3, the XiD includes a coaxial out for legacy SD TVs in addition to HDMI out. Pace (PXD01ANI) XiD-P and Cisco (CXD01ANI) XiD-C are the vendors of the XiD. 

    These boxes eventually replaced the Xi3 entirely.

    You can tell the difference between the two models by the label on the underside. The DTA version has a white label with black lettering, while the X1 version has the inverse -- a black label with white lettering and has the website link as "xfinity.com/x1".

    Link to basic information

    Click for full size

    Click for full size

    Click for full size


    Xi5 wireless IP-only client

    It appears the Xi4 generation was skipped. The Xi5 supports all the same X1 features as the Xi3/XiD.

    The Xi5 has no coaxial input, it is strictly for use over 5Ghz Wi-Fi or wired Ethernet.

    The Xi5 requires a wireless gateway that runs RDK-B firmware. Currently, this means you must use a Comcast provided wireless router.

    A list of Comcast internet gateways and their features is available here:

    https://www.xfinity.com/support/articles/broadband-gateways-userguides

    The initial Xi5 units were made by Pace, model: PX051AEI

    Comcast has made a new FAQ for the Xi5 and Xi6 here:

    https://www.xfinity.com/support/articles/wireless-tv-box-faqs

    Click for full size


    Xi6 UHD/HDR IP-only wireless client

    This is the latest client device, similar to the Xi5 but newer and more powerful since it supports H.265/HEVC decoding for 4k UHD playback and HDR10 compatibility. The first wave of boxes were provided by Arris, so it is named the Xi6-A (Model: AX061AEI) (also referred to as ACQ-XI6). Technicolor became the second vendor to supply Xi6 (Model: TX061AEI).

    Comcast has made a new FAQ for the Xi5 and Xi6 here:

    https://www.xfinity.com/support/articles/wireless-tv-box-faqs

    https://www.xfinity.com/support/articles/pair-wireless-tv-box-to-xfinity-in-home-network


    Click for full size


    IP-Only Client Box NOTE:

    As Comcast has moved towards IP simulcasting of all channels, the requirement to have a traditional cable box "gateway" (XG1 or XG2 series) for the Xi5/Xi6 client boxes to use for live TV has changed. This is generally no longer a requirement for most markets. Also note that there's lots of information out there (including Comcast reps) that do not have the most up to date information.



    More information:

    X1 Comparison Charts

    https://customer.xfinity.com/help-and-support/cable-tv/x1-hub-vs-companion-box/

    https://customer.xfinity.com/help-and-support/cable-tv/x1-application-availability/


    As of 2021, Comcast has enabled HDMI-CEC on select newer boxes:

    https://www.xfinity.com/support/articles/x1-power-preferences


    Netflix FAQ outlining support for various Comcast X1 boxes

    https://help.netflix.com/en/node/51791


    Legacy - Comcast RNG equipment


    NOTE: This FAQ is about legacy equipment. If you're looking for information about X1 and the cable boxes that support it, please see: »Comcast Cable TV FAQ »All about X1


    Circa 2008 Comcast started to label their boxes as different numeric levels of "RNG" (Residential Network Gateway). This is a Comcast designation for cable boxes that meet a certain level of features and performance. RNG labeled cable boxes must decode both MPEG2 and MPEG4/AVC (H.264), have an integrated DOCSIS 2.0 (or better) modem, and be capable of supporting more modern guide software (though Comcast has generally not used them in this manner). Most models are also capable of decoding the newer Dolby Digital Plus audio format [for future uses].



    The RNG designation allows Comcast to have a standard naming scheme to convey the capabilities of boxes from all set-top box vendors (i.e. Motorola, Pace, Cisco, and any other brands that Comcast chooses to buy from in the future). 

    • 100 range boxes are standard cable boxes
    • 200 range boxes are DVR boxes
    • An "N" in the model number tells us that it has MoCA networking for AnyRoom DVR support.



    RNG100 -- This designation has only been used for one Cisco box (a relabeled Cisco Explorer 1540C). It is unique in the fact that this is the only standard definition cable box to have meet the requirements for an RNG. All others in the RNG line-up are HD capable.



    RNG110 -- This designation has only been used by one Pace box, which Pace actually named the RNG110 on their manufacturer site. It has no AnyRoom client abilities, it is a simple HD capable digital cable box. Commonly deployed to customers who do not wish to have a DVR for their first TV or as a second room TV box. It also comes in a variant with an RF coaxial output (ch. 3/4) for legacy customers who would like a modern cable box and/or have a reason to use both an HDMI connection and an analog RF one (i.e. a VCR, DVD recorder, etc.).



    RNG150 -- This has only been used for a single Cisco cable box (a relabeled Cisco Explorer 1640HDC), as the designation implies, it does not support being an AnyRoom client. It appears to be roughly equivalent to the Pace RNG110 used in Motorola areas.



    RNG150N -- These boxes are widely used and come from all three main vendors (Cisco, Motorola and Pace). They are made to be used as AnyRoom DVR clients and are also commonly deployed as single HDTV boxes for bedrooms, etc.
    In Scientific Atlanta/Cisco areas this is a re-labeled Cisco Explorer 1642HDC
    The RNG150N in Motorola areas is typically a re-labeled Motorola DCX3200/M Phase 2.


    New deployments of the X1 DVR use Pace branded RNG150N's (model numbers "PR150BNM X1" and "PR150BNC") in a new custom chassis loaded with the X1 Guide software as their boxes for other rooms. More recently, this Pace model is also being used for regular installations (non-X1 customers), the box will boot to a diagnostic screen and download the legacy i-Guide software, overwriting the X1 version.



    RNG200 -- This an HD DVR without AnyRoom abilities. This code has only been used for a relabeled Cisco Explorer 8540HDC/8550HDC.



    RNG200N -- This is the top level of features. It is an AnyRoom capable DVR. This generic labeling has been applied to Cisco DVRs and to Motorola DVRs. Pace also has an RNG200N on their products website, but it appears Comcast is not using these yet.


    In Motorola systems RNG200N refers to two models: either DCX3400/M or most recently DCX3501/M. The DCX3501/M shows up as code "MOR200BN" in the equipment listing of the Comcast customer website.

    Like Pace, Cisco has started to offer up product pages using the Comcast naming scheme in addition to their traditional "Explorer" naming scheme for other cable providers. The newest Cisco DVR that Comcast and Cisco label as RNG200N is basically a Cisco Explorer 8652HDC.




    NOTE: If you are in a Motorola area and want to find the actual manufacturer's model number, check the bottom or the backside of the cable box for the FCC label. The front panel was customized by Comcast with an RNG designation, so it is not a reliable way to find the actual model number.


    Legacy - Comcast Motorola Equipment


    NOTE: This FAQ is about legacy equipment. If you're looking for information about X1 and the cable boxes that support it, please see: »Comcast Cable TV FAQ »All about X1


    The following websites pertain to information regarding the Motorola equipment.

    How to use a Motorola DVR

    Motorola Customer Premises Equipment (Set-Tops)

    About 80% of Comcast's systems are Motorola based.

    There are a few series of Motorola set tops.
    The low-end Motorola 68k models include the DCT-1700, 1800, and 2000. Due to the limited memory and processing power, these models have a reduction in amount of guide data that is stored in memory. While they can still support simple ITV applications, the local area will need to employ guide filters to these set tops that prevent them from loading a full set of guide listings. Also ITV transparency elements are not available, as well as video scaling. The general performance (navigation and channel changing) is much slower. These set tops are SD capable ONLY. Back in the early days of HD, a Motorola HDD-200 sidecar box could be connected to the data port on DCT-2000's to enable HD decoding.

    The mid-range Motorola MIPS-32 models include the DCT-2500, DCT-700, DCH-70, DCH-100, DCH-200. These models are noticeably faster than the older 68k models. They support video scaling, which means you will see the current channel scaled down to fit in the upper right corner of the guide. These set tops are SD capable ONLY.

    The high-end Motorola MIPS-64 models encompass a larger subset of equipment:
    DCT-5100 Original HD cable box (DVI Interface)
    DCT-6200 Widely used HD cable box (DVI Interface)

    DCT-6208 Single Tuner HD DVR (DVI Interface) (80GB)
    DCT-6412/6416 Dual Tuner HD DVR (DVI Interface, except for Phase 3 revision which has HDMI) (120GB/160GB)
    DCT-3412/3416 digital-only Dual Tuner HD DVR with HDMI (120GB/160GB)

    DCH-6412/6416 CableCARD Dual Tuner HD DVR with HDMI (120GB/160GB)
    DCH-3412/3416 CableCARD digital-only Dual Tuner Cablecard DVR HD DVR with HDMI (120GB/160GB)

    DCX-100 MPEG4 compatible SD digital-only cable box with 1GHz tuning (M Models support MoCA) and CableCARD
    DCX-700 Small Form Factor MPEG4 compatible HD digital-only box with 1GHz tuning (M Models support MoCA) and CableCARD
    DCX-3200 MPEG4 compatible HD digital-only box with 1GHz tuning (M Models support MoCA) and CableCARD
    DCX-3400 MPEG4 compatible digital-only dual-tuner HD DVR with 1GHz tuning (M Models support MoCA) and CableCARD
    DCX-3501 (AKA RNG200N) MPEG4 compatible digital-only dual-tuner HD DVR with 1GHz tuning (M Models support MoCA) and CableCARD

    The latest DCX models have the most available memory and processing and can be configured with as much as 512MB RAM, and 500GB Hard Drive (DCX-3501). The DCX-3x00 series also allows native HD resolution pass-through, video sharpness post processing, and can decode Dolby Digital Plus. The DCX models also run much cooler than their DCH / DCT cousins. All i-Guide and Interactive TV features will work on the MIPS-64 based boxes.

    The Motorola naming scheme is as follows:
    DCT series - integrated security (no CableCARD slot)
    DCH series - separable security (CableCARD pre-installed)
    DCX series - separable security (CableCARD pre-installed), Advanced functions (Processor, Memory, MoCA, MPEG4, Dolby Digital Plus, 1GHz Tuning)
    QIP series - integrated security (no CableCARD slot), similar to DCX series with MoCA and IPTV functionality paired with traditional QAM tuning. This series is only used for Verizon FIOS.


    What is a DTA? What channels can I get with a DTA? What about those new HD-DTA?


    DTA stands for Digital Transport Adapter. Comcast also refers to them simply as "digital adapters." It's an inexpensive and very basic digital cable device that allows you to watch all Limited Basic and Expanded Service channels that were migrated from analog to digital (Usually the first 99 channels). DTAs will not receive premium channels such as HBO, Showtime, etc. Consult your local Comcast center for an applicable channel lineup card for details.

    Click for full size

    The DTA does not offer any advanced features such as OnDemand or Pay-per-view. Standard DTAs are intended for legacy analog TV sets, as such they only feature an RF coaxial output that transmits a video signal on channel 3 or 4 (switchable), in this regard it is like a VCR or the old analog cable boxes used in the '80s and '90s. HD-DTAs are simple boxes for a second or third TV that have an HDMI port.

    More information is available here: https://www.xfinity.com/support/articles/digital-adapter

    Click for full size

    Click for full size

    Does the DTA have a guide?

    Yes a basic guide was rolled out throughout 2014-2015 to all markets.

    Standard DTA Guide:

    https://www.xfinity.com/support/articles/dta-on-screen-guide

    HD DATA Guide:

    https://www.xfinity.com/support/articles/hd-dta-on-screen-guide

    FAQ: https://www.xfinity.com/support/articles/dta-guide


    HD DTA and uDTA

    In 2013 Comcast, began to offer an HD capable version of a DTA for Limited Basic subscribers who would like access to the HD versions of their channels. 

    These newer devices are also called uDTA, "u" for universal, since they work for any TV set, and in all Comcast markets. A major improvement with these newer models is the ability to use an RF remote (like the XR2 which is included in the self-install kits) with the uDTA so it can be totally out of sight, for example: mounted on the back of a TV.

    It costs the same $1.99/month. Like the standard definition version, it is a simple small black box, in addition to an RF coaxial output (for legacy TVs), it features an HDMI connection. For Limited Basic users there are no other fees. For those on higher-up plans it will require the addition of the HD Technology fee ($9.95) if it is not already on your account.


    NOTE:

    On the HDMI setup menu, there is an aspect ratio option for 4:3, 16:9 & AUTO, there is also a setting for the standard output resolutions (480i/p, 720p, 1080i) plus an AUTO setting - which the DTA was defaulted to.  The AUTO setting is for legacy users and compatibility sake, AUTO seems to downconvert every channel (HD included) to 4:3 and 480i. You must explicitly set it to 16:9 and an HD resolution to get an HD picture.


    More information on the HD DTA can be found at the links below:
    https://www.dslreports.com/forum/r28301671-DTA-HD-DTA-s-are-here-in-Springfield-IL-a-review

    http://blog.trebacz.com/2013/09/comcast-xfinity-hd-udta-pace-dc60xu.html


    Accessing the DTA diagnostics screen

    To bring up the Diagnostic Screens Menu, hold down the "0" (Zero) key on the remote until it displays. Then use the arrows and Enter keys to select submenu options. Hit "Last" to return to the main menu or "7" or "Exit" to get out of the diagnostic mode.

    Click for full size

    Example of diagnostic menu on a modern uDTA (click to enlarge)


    CableCARD, TiVo, and Comcast STB: What's best for me?

    When you get digital cable, you have a couple of choices for service. (1) Comcast STB or DVR and (2) CableCARD devices like the TiVo HD, and TiVo Premiere and Windows Media Center CableCARD tuners such as the Ceton InfiniTV or Silicon Dust HDHomeRun Prime.

    With a Comcast STB/DVR, you receive all the SD and HD programming that you pay for, plus access to Comcast's On Demand and PPV services. Comcast is responsible for troubleshooting problems and replacing dead/defective equipment. Cost varies by market, typical rental fees are $8 per digital box. Renting a DVR adds another $16 on top of that. Contact your local office for more information.

    By using the Comcast STB/DVR, you are limited to whatever software and hardware capabilities that Comcast offers in your area. In most markets, Comcast uses Motorola DVRs that do not currently support storage expansion beyond the built-in 20-30 HD hour capacity. In some markets, Comcast uses Scientific Atlanta DVRs that may support external expansion with eSATA drives.

    CableCARD devices like the 3rd and 4th generation TiVo's and Windows Media Center have a program guide with 14-days of program information; they download this guide information from their own servers using a wired or wireless connection to your home network. Advantages include superior DVR functionality, usability (ex: no remote lag, improved commercial skipping), up to six times the capacity (157 HD hours), support for external hard drives (up to 300+ HD hours), remote scheduling, and PC/Mac integration. Other TiVo features include multi-room viewing and the ability to download some SD and HD recordings to your computer. However, CableCARD devices do not have access to OnDemand or PPV. This limitation is changing somewhat as TiVo has worked with Comcast to allow OnDemand access via an app for the TiVo Premiere hardware in select markets, see this TiVo website for more details.
    However any other CableCARD devices such as the older TiVo HD series or Windows Media Center are still unable to use OnDemand.

    CableCARDs are essentially access cards; they plug into the device and authorize all of the channels you pay for. The Tivo's and Windows Media Center add-in cards support multiple tuners with a single CableCARD (M-CARD). Comcast will provide one free CableCARD as part of digital service, but additional CableCARDs will cost $1.50-$2.50/ea. If you have another Comcast STB/DVR in your home, or buy a second TiVo, you may be assessed an additional "outlet fee."

    You do not pay Comcast STB or DVR fees to use CableCARD devices. The purchase of a TiVo typically results in lower monthly fees, but it takes years for that savings to offset the purchase price. People who buy a TiVo typically do so because they want the improved DVR functionality, usability, and storage capacity. If you decide to buy a TiVo, do so with the knowledge that that Comcast is not responsible for replacing dead/defective equipment (with exception to the CableCARD).


    In mid-2016 Comcast setup a new self-service portal of CableCARD users:

    »activatecablecard.xfinit ··· ctivate/


    If I buy a digital cable box online (eBay, Craigslist, etc), will it work?


    In the United States cable company equipment is generally leased. Many of the boxes you see for sale online may be from Canada where they do sell equipment outright, or it may stolen from another branch of Comcast or another cable company entirely, etc.

    More likely than not digital cable boxes for sale on eBay or sites like Craigslist, and others, were stolen. Comcast will not activate boxes bought off the Internet.

    If you have bought one, you should return it to the closest Comcast location and pick up a legal box from that center.

    If you want cable service you should rent a cable box from Comcast or, if you'd like own your own equipment, it is recommended that you purchase a TiVo and then rent a CableCARD from Comcast.


    While there is an FCC rule (in effect since 2011) that requires cable operators to allow consumers to activate their own set-top boxes, finding legitimate aftermarket cable boxes is hard, and when they are legitimate they are surplus models that have been sold off by cable companies. So you'll likely get a well used, somewhat older model.

    NOTE: None of these older models are compatible with the new X1 service. This is strictly for legacy guide customers.

    Currently there is only one well known legitimate vendor of cable boxes, it can be found here: »www.hddvrtv.com/


    Technical

    Why does x area have more HD channels than my area?

    More HD is coming. What, when and where is up to each region. Many area's need to work on "reclaiming" some spectrum which can be used for more HD launches. Reclaiming bandwidth can come from migrating an analog channel to digital, or re-optimizing a multiplex so that 3 HD channels can fit in the same space a regular analog channel would fit. Migrating HD from the normal 2:1 to a 3:1 mux would be unnoticed for most people since the channel mapping stayed the same, it was just the source that changed. Each analog channel slot can contain up to 12 (soon to be 15 with new grooming) SD digital channels. Many Comcast systems have over 2/3rds of their bandwidth dedicated to Analog channels. It is vital that these channels are migrated to digital for better resource allocation over the RF network.

    With any channel launch or frequency change, there is a LONG drawn out process that must be followed. The FCC requires notice to be given for any channel changes or removals/repositions. Corporate must approve any channel change requests and then there is the marketing side with contracts, timing and advertising. For any MAJOR changes Comcast is required to give 30 days notice, and just getting that out can sometimes be troublesome. One way around a 30 day notice in a channel add would be a soft launch. A soft launch is when channels will appear 'out of the blue'. Usually a week or two later there will be an ad in your local paper saying that the channels will be available 30 days from now, but you can enjoy a 'free preview' today.

    It's also because of this required notice, along with the mis-match of channel maps, channel locations, etc, between all the various systems throughout their history of acquisitions that you end up having the channels all over the place. Comcast tries to stick things where they can find room. A region may have 30+ channel lineups to handle each with it's own bandwidth limitations. Imagine playing a really hard game of Soduku. If you simply make a change to a multiplex in one area, it's likely to affect 30 other area's because they are pulling the video from the same multicast IP address. Everyone must be coordinated and on the same page. Adding/changing channels can be a very messy and tedious project.

    Definitions:
    Multiplex - communicates two or more signals over a common channel
    Mux - Shorthand for Multiplex. 2:1 Mux means 2 signals are broadcast over a common channel. 3:1 means 3 signals are broadcast over a common channel, etc.
    RF - Radio Frequency
    SD - Standard Definition (up 480i resolution)
    HD - High Definition (1280x720p or 1920x1080i resolution)
    Multicast - addressing is a network technology for the delivery of information to a group of destinations simultaneously using the most efficient strategy to deliver the messages over each link of the network only once, creating copies only when the links to the multiple destinations split.
    Bandwidth - The width, usually measured in hertz, of a frequency band; Of a signal, the width of the smallest frequency band within which the signal can fit; A measure of data flow rate in digital networks typically in bits per second; The capacity, energy or time required


    What is AnyRoom DVR?

    AnyRoom DVR is an offering by Comcast that allows recordings to be stored on a single host DVR (usually placed in the Family/Living Room) and then can be watched on a client set-top boxes (usually in a bedroom, kitchen, playroom, etc).

    The boxes communicate in the house using a technology called Multimedia Over Coax Alliance or MoCA for short, this is the industry standard for multi-room DVR, used by all the major cable and satellite TV providers. The AnyRoom DVR allows the DVR recordings to be watched in any room using a compatible Set-top. For "classic" AnyRoom DVR service (boxes using the older i-Guide interface) client boxes cannot be used to program the DVR or schedule recordings but this can be done on the Comcast.net website or using their iPhone/Android apps. The new X1 platform does allow for scheduling and managing recordings from the secondary boxes. See the X1 FAQ for more information.

    An initial installation by a Comcast technician is required for the AnyRoom DVR service. The technician will install a MoCA trap on the incoming line (the point of entry) to isolate the MoCA signals from the rest of the cable plant and the installer will then setup a compatible DVR and client boxes. The equipment that is currently offered works with HDTV and Standard Definition televisions sets. After the installation, any faulty equipment can usually be swapped out at a local office but the replacement equipment must be compatible (MoCA ready). The provisioning of the equipment is done remotely.

    Additionally the inside wiring must be in good condition as MoCA operates in the higher frequencies in between and above all normal cable TV signals. Wiring should be RG6 or better. The installer will check levels and cabling issues before installation.

    Thanks to IowaCowboy See Profile for the initial wording of this FAQ entry.


    How does Comcast's Video Distribution Network Work?

    The Master Headend or does their bit in aggregating and sending the video signals in MPEG format across the CRAN network. From the cran it goes to the various local headends via Multicast UDP through routers. Finally the local hub picks up the signal and converts it to RF to shoot out over the network. There is also a VOD server farm, which could reside in it's own building or in a regional headend depending on the local archetecture either built by Comcast, or inherited from acquisitions. VOD has been known to spread apart to other larger headends in the region for redundancy. There are various hubs spread out along the plant house the OOB communications equiptment and the VOD (and potentially SDV) edge qams.

    There are digital controllers that address all of the set top boxes in the area's. For Scientific Atlanta sites there's a *NIX based server called the DNCS, while Motorola sites there is a server called the DAC. While DNCS's and DAC's pretty much do the exact same job, the way they do it on a SA plant vs Motorola plant are ENTIRELY different. Motorola tends to break things out a bit more with NC1500's, RPD's, etc.....While SA tends to centralize things a bit more within it's DNCS/Appserv setup.

    Definitions:
    Headend - The control center of a cable-television system, where incoming signals are amplified, converted, processed, and combined into a common cable for transmission to subscribers.
    CRAN - Comcast's Reginal Area Network
    Multicast - network technology for the delivery of information to a group of destinations simultaneously using the most efficient strategy to deliver the messages over each link of the network only once, creating copies only when the links to the multiple destinations split.
    UDP - A communications protocol that is mostly used to send streamed material over a Network
    VOD - Video On Demand
    SDV - Switched Digital Video - A method of broadcasting only channels that are currently tuned, rather than every channel offered at once.
    DNCS -Digital Network Control System
    DAC - Digital Addressable Controller
    SA - Scientific Atlanta (now owned by Cisco).
    NC1500 - Motorola device that links application servers and set-tops using Internet Protocol (IP) to deliver data packets through the out-of-band data channel.
    RPD - Motorola's Return Path Demodulator for interpreting commands from the Motorola Cable Box back to the Cable Headend.
    OOB - Out of Band communication. Method used to program cable boxes remotely, while allowing their tuners to be on any channel.

    What are the national 3:1 HD muxes from Comcast?

    Although this list is not complete, here are the majority of the Muxes from Comcast Media Center. They are available on the CRAN network, and some of them are available via Satellite. For an explanation of CRAN and what it means for you, please see this entry courtesy of our friends in Comcast HSI: »Comcast High Speed Internet FAQ »What is CRAN?

    A 3:1 HD mux means 3 HD channels in 1 38.8mbps QAM. Instead of dedicating 19.4mbps for one HD channel, it is varied depending on the channels on each QAM. As of late Comcast has modified their "muxes" in order to improve picture quality; they place 2 1080i channels and 1 720p channel together.

    Mux 1 Starz East, HGTV, A&E
    Mux 2 Food, SciFi, UniversalHD
    Mux 3 Discovery, USA, NatGeo
    Mux 4 HDTheater , Animal Planet, History
    Mux 5 HBO East, Max East, TLC
    Mux 7 AMC, Golf, CNN
    Mux 8 Disney, ABC Family, Science
    Mux 9 FX, Speed, Fox News
    Mux 11 IFC HD, WE HD, Fuse HD
    Mux 12 Encore HD, Fox Bsiness, Hallmark Movie Channel
    Mux 14 Bravo, CNBC, QVC
    Mux 15 MGM HD, ESPNews, Toon Disney
    Mux 16 Lifetime Movies, Biography, Planet Green
    Mux 17 E!, Travel, Cartoon
    Mux 18 Starz Edge, Starz K&F, Starz Comedy
    Mux 19 Spike, Lifetime, Nickelodeon
    Mux 20 G4, Style, TV One

    What is QAM?

    QAM stands for Quadrature Amplitude Modulation. It's a modulation scheme that transmits data by changing the amplitude of two carrier waves. The two carrier waves are out of phase with each other by 90 degrees. Digital Cable uses QAM to transmit the majority of their signals. Two major QAM schemes are 64QAM and 256QAM. 64QAM contains data throughput around 28 mbps, where 256QAM has data throughput of 38.8 mbps.

    If your TV has a QAM tuner, it has the ability to read this signal and display it. The cable company can encrypt the digital video carried in a QAM signal and this is commonly referred to as Encrypted QAM. To receive Encrypted QAM, you would require a device with a CableCARD slot or an official Comcast digital receiver.

    A QAM tuner on a TV or DVD recorder does not 'map' the channels to the same location on the Comcast channel lineup card. A QAM tuner will display unencrypted channels on their physical location in relation to the frequency they are carried on.

    Some areas are able to pass PSIP data along with local broadcasts. PSIP data is embedded in the digital information that tells your TV what channel number to display. For example, Channel 3 in HD may embed 3.1 in it's video stream. Your TV would be able to tune this by typing in 3-1. Each Comcast area is different, and some may not pass PSIP.

    It's also recommend to force your TV or DVD recorder to rescan the QAM channel lineup from time to time. Additional channels may show up unencrypted or may have changed frequencies.

    NOTE: Comcast does not guarantee channel availability through a QAM tuner. Comcast has been slowly encrypting all channels in many markets, if this is the case you will not be able to receive any channels without a set-top box. »customer.comcast.com/hel ··· ryption/

    If your looking for a QAM channel lineup, there is no official one from Comcast. You could try the SiliconDust HD-Home Run page. Enter your zip code at this following website:
    »www.silicondust.com/hdho ··· channels

    Then choose "Comcast" from the pick list menu.

    Digital TV Transitions

    The June 12, 2009 digital transition will have absolutely NO EFFECT on your Comcast service! This date is a Government mandate that only affects over-the-air broadcasters. Cable systems are using their own private RF spectrum over fiber and coaxial cable. Comcast will do what they want with their spectrum when they want. Expect Comcast to take advantage of the situation by attracting new customers signing up to basic cable because their over the air antenna no longer works. Comcast will also take advantage to run additional outlets in homes where some rooms relied on rabbit ears while only the primary room had cable.

    You may of heard of Comcast digital migration website seen here: http://comcastdigitalworld.com/ or »www.comcast.com/digitalnow It's true that digital signals are a much more efficient way of transmitting video. Remember, with every one analog channel removed, about twelve standard definition digital channels can be added. With the much higher bandwidth requirements of HDTV channels, each analog removed would allow a system to add three additional HD channels. The removal of analog channels can also be used to increase cable Internet service speeds and capacity, for every analog channel removed it gives back about 38Mbit/sec of speed to be used for Internet subscribers.

    Because of the efficiency with the digital transmission, Comcast has also slowly been migrating channels from analog to digital. This has been done in phases throughout 2009-2012. As of early 2013, the vast majority of Comcast's systems have now been migrated to 100% digital.

    For more see: »customer.comcast.com/hel ··· igration


    How do I check a channel's signal strength?

    In order to troubleshoot issues channels breaking up, turning to a black screen, or saying "This channel will be available shortly" you should check your signal strength. There are hidden diagnostic menus for most cable boxes that will let you find the signal strength.

    X1 platform

    Hold Exit key for 5 seconds
    Hit down arrow twice
    Hit #2

    Note: you won't see any feedback that these steps are working, just move through the steps quickly. If it works you'll be presented with a white diagnostic screen. It may take a few tries to get the feel for the timing needed to activate the diagnostics screen.

    Legacy cable boxes

    For Motorola cable boxes:

    Turn the STB off and press OK/SELECT on the remote within 2 seconds to enter the diagnostic menu.

    There is extensive documentation on using the diagnostic menus over at the Motorola DVR Wikihow site:
    »en.wikibooks.org/wiki/Ho ··· Strength


    Pace boxes also follow the Motorola procedure.


    For Cisco/SA cable boxes:

    Turn to the channel that is giving you issues and then follow the instructions below.

    • For newer Cisco branded cable boxes: Power off the box, Press down the power button on the cable box until the green light blinks twice, then give the power button a quick press again.
    • All Other SA boxes: Power off the cable box, Press the OK/Select button and the Info button on the cable box at the same time.
      Once the Message light on the front of the box starts to flash press the INFO button on the front.

    You navigate the menus with the Vol +/- keys on the remote.

    Choose the RF Status

    The stats are color coded, amber signifies a borderline signal and red means there is a definite issue with the signal quality.

    Click for full size

    * CURRENT QAM refers to currently tuned video channel:
    Level: Should be -12 to +15 dBmV for QAM256
    S/N: Should be 33 dB (or more) for QAM256 [This is more important than level]
    Seconds: How long channel has been tuned.
    Corr Bytes: How many bytes were detected in error and corrected since first tuned
    Uncor Blks: How many data blocks that failed parity check, but could not be corrected.
    Errs Avg/Inst: Average and Instantaneous Bit (byte? block?) Error Rates.

    When finished press the EXIT button on the front of the cable box.


    CableCARD notes/tips

    Comcast may ask for the "Data ID" which is not technically the correct term. The Host ID is what Comcast calls the "Data ID", provide the phone rep the Host ID and Card ID and your CableCARD device should be easily activated over the phone.