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gdtrfb
join:2002-05-17
San Diego, CA

gdtrfb

Member

Looking for Arcom FRSA50-3 and / or 6 Upstream Pad

I have a FRSA50-9 pad installed, when installed, I get 52/54+ db upstream, w/o it my upstream goes to 36 / 38. I'd like to get to the mid 40's w/o having to call and get a tech deployed.

My downstream levels are OK...all around 0.

Anyone who can provide a source for one?

Beezel
join:2008-12-15
Las Vegas, NV

Beezel

Member

That would be a signal attenuator.

»www.amazon.com/Parts-Exp ··· -8958259

Just do a search for signal attenuator.

Anonguy
@cox.net

Anonguy to gdtrfb

Anon

to gdtrfb
said by gdtrfb:

I have a FRSA50-9 pad installed, when installed, I get 52/54+ db upstream, w/o it my upstream goes to 36 / 38. I'd like to get to the mid 40's w/o having to call and get a tech deployed.

My downstream levels are OK...all around 0.

Anyone who can provide a source for one?

Something isn't adding up.

If without you are at 36/38 With you should be at 45/47. Not 52/54

Are you also using any small jumpers or anything with the pad?
gdtrfb
join:2002-05-17
San Diego, CA

1 edit

gdtrfb

Member

I know, it didn't add up for me either. Yes, there is a 6db attenuator still on the cable. I'm on the end of a run, last house on the block.
gdtrfb

2 edits

gdtrfb to Beezel

Member

to Beezel
Thanks for the headsup, but this is an upstream attenuator I'm looking for. What commonly is available are up and downstream attenuators, like the one you sourced out.

Anonguy
@cox.net

Anonguy to gdtrfb

Anon

to gdtrfb
Why don't you take the 6 off, replacing it with the 9 and leave it like that?
gdtrfb
join:2002-05-17
San Diego, CA

1 edit

gdtrfb

Member

said by Anonguy :

Why don't you take the 6 off, replacing it with the 9 and leave it like that?

The Arcom FRSA50-9 only amplifies the upstream.

" RSA's selectively add attenuation in the return band "
»www.arcomlabs.com/33Retu ··· ors.html

With no splitter and a 6db pad the modem has the following readings:

Model: Cisco DPC3010
Vendor: Cisco
Hardware Revision: 1.0
MAC Address: 00:25:2e:d0:
Bootloader Revision: 2.3.0_R1
Current Software Revision: d3000-v302r125533-120716a-COX
Firmware Name: d3000-v302r125533-120716a-COX.bin
Firmware Build Time: Jul 16 17:16:46 2012

Downstream Channels
Power Level: Signal to Noise Ratio:
Channel 1: -2.1 dBmV 39.1 dB
Channel 2: -1.5 dBmV 39.5 dB
Channel 3: -1.5 dBmV 39.7 dB
Channel 4: -1.9 dBmV 39.4 dB
Channel 5: -2.2 dBmV 39.1 dB
Channel 6: -1.6 dBmV 38.2 dB
Channel 7: -2.1 dBmV 38.0 dB
Channel 8: -2.0 dBmV 38.2 dB

Upstream Channels
Power Level:
Channel 1: 39.5 dBmV
Channel 2: 38.0 dBmV
Channel 3: 0.0 dBmV
Channel 4: 0.0 dBmV

odog
Minister of internet doohickies
Premium Member
join:2001-08-05
Atlanta, GA
Nokia BGW320-505

1 recommendation

odog

Premium Member

said by gdtrfb:

said by Anonguy :

Why don't you take the 6 off, replacing it with the 9 and leave it like that?

The Arcom FRSA50-9 only amplifies the upstream.

" RSA's selectively add attenuation in the return band "
»www.arcomlabs.com/33Retu ··· ors.html

With no splitter and a 6db pad the modem has the following readings:

Model: Cisco DPC3010
Vendor: Cisco
Hardware Revision: 1.0
MAC Address: 00:25:2e:d0:
Bootloader Revision: 2.3.0_R1
Current Software Revision: d3000-v302r125533-120716a-COX
Firmware Name: d3000-v302r125533-120716a-COX.bin
Firmware Build Time: Jul 16 17:16:46 2012

Downstream Channels
Power Level: Signal to Noise Ratio:
Channel 1: -2.1 dBmV 39.1 dB
Channel 2: -1.5 dBmV 39.5 dB
Channel 3: -1.5 dBmV 39.7 dB
Channel 4: -1.9 dBmV 39.4 dB
Channel 5: -2.2 dBmV 39.1 dB
Channel 6: -1.6 dBmV 38.2 dB
Channel 7: -2.1 dBmV 38.0 dB
Channel 8: -2.0 dBmV 38.2 dB

Upstream Channels
Power Level:
Channel 1: 39.5 dBmV
Channel 2: 38.0 dBmV
Channel 3: 0.0 dBmV
Channel 4: 0.0 dBmV

A "step" attenuator is mostly for the provider to use at the tap, to prevent ingress or the possibility of ingress. After the attenuator you're signal is still what it always was. It looks like you're in the kind of situation where a step attenuator wouldn't be a bad idea. You're probably on a terminating tap, with low insertion loss. The SA doesn't really increase your real level, but does prevent you from being a super bad ingress point.

They also don't amplify the return power, they "force" the modem to transmit at a higher power.