Rattler
join:2001-04-13
Havertown, PA
 ·Verizon Online DSL
 ·Verizon FIOS
edit:
May 10th, @02:11PM
| reply to KA3SGM
Re: Best splitter...does it really matter?
@ KA3SGM:
I was just listing the approximate numbers that could possibly be expected for a decent unit - 2 dB loss per leg is just not possible on a passive splitter.
The 6-way splitter V* used on my install is a PDI and the insertion loss (11.5 dB) was marked on each output - I didn't see any test freq. listed.
I bought the R/S splitter (#15-2587) because I needed one ASAP and it was expensive for a 2-way (~$11). They had two types on the rack, one was rated at 5-100 MHz and this one was spec'd at 5 - 1100 MHz. Neither had any insertion loss numbers.
I used it to split the coax to my HD-DVR and the freebie DCT-700, at the wall plate. Both are working fine. The SNR on the HD-DVR @ 633 MHz is 36.5 dB/GOOD and no errors, with the splitter in the line. So with the 11.5 dB at the 6-way tap and maybe another 4-5 dB at the R/S 2-way, I still have a good signal at the HD-DVR.
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Never raise your hands to your kids. It leaves your groin unprotected. -- Red Buttons |
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KA3SGM
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Premium
join:2006-01-17
West Chester, PA
clubs:
·Verizon FIOS
| Rattler, whatever works.....
Do you have a Tellabs, or an Alcatel ONT??
I know the Tellabs ones run the Video pretty hot, between +18 db / +20 db, but not sure about the newer Alcatel ones.
I know I can run a single 16-Way splitter without problems off of a Tellabs 612, which is -16.5 db per port, but currently have the Router, ONT, 3 HD-DVR's and 2 SD boxes on a single 8-Way, with 1 port terminated and another jumping to a separate 6-way that feeds Analog(but not for long), QAM tuners, and 3 DCT700 Digital Adapters.
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"Lithium is no longer available on credit" |
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Rattler
join:2001-04-13
Havertown, PA
·Verizon Online DSL
·Verizon FIOS
| @ KA3SGM...
I have an Alcatel (my CO, Kirklyn, is GPON).
I don't know what the output level of the ONT is and have been kicking myself for not asking the install tech what it was... 
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Never raise your hands to your kids. It leaves your groin unprotected. -- Red Buttons |
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GeekGirl1
The Medium IS the Message
Premium
join:2007-01-28
Morrisville, PA | +18 dBmV |
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Rattler
join:2001-04-13
Havertown, PA | Merci, GG1 !!! |
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KA3SGM
- -... ...- -
Premium
join:2006-01-17
West Chester, PA
clubs:
·Verizon FIOS
| reply to GeekGirl1
said by GeekGirl1  :+18 dBmV GeekGirl1, Yes +18 dbmv is the Tellabs 612 Video Output Spec, but why am I afraid that you also tested it yourself to confirm that it was true?? 
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"Lithium is no longer available on credit" |
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lets456
join:2008-01-21
Hainesport, NJ
| Thanks for the replies. I had to have a tech come out to replace a panel on my ONT....the phone portion died. Anyway I asked him about the splitter and he said what most of you mentioned....about losing a certain amount of -Db every 25' or so then about how much you lose (-3Db) per split. However, he mentioned that when they install the bigger concern is having a signal that's too hot and need to attenuate down....so splitting many times is not a problem.
He said he did a house with 26 "splits" and was the only time he had to use and amplifier. |
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GeekGirl1
The Medium IS the Message
Premium
join:2007-01-28
Morrisville, PA
·Verizon FIOS
·Verizon Online DSL
edit:
May 17th, @11:10AM
| reply to KA3SGM
said by KA3SGM :GeekGirl1, Yes +18 dbmv is the Tellabs 612 Video Output Spec, but why am I afraid that you also tested it yourself to confirm that it was true??:p Have you ever known an engineer with equipment in-hand to not do otherwise? Of course I did (with the Verizon techs during the original install). Be very afraid. The saga continues: »10 way splitter |
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KA3SGM
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Premium
join:2006-01-17
West Chester, PA
clubs:
·Verizon FIOS
| said by GeekGirl1 :said by KA3SGM :GeekGirl1, Yes +18 dbmv is the Tellabs 612 Video Output Spec, but why am I afraid that you also tested it yourself to confirm that it was true??:p Have you ever known an engineer with equipment in-hand to not do otherwise? Of course I did (with the Verizon techs during the original install). Be very afraid. The saga continues: » 10 way splitter I have been meaning to pick up one of those cheap 'Sunrise 750' CATV Meter/Analyzers that pop up on ebay from time to time.
Only problem is that I know they have a 99% probability of being stolen property, so I tend to back away from what otherwise looks like a really good deal.
--
"Lithium is no longer available on credit" |
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