[gweegz]

Have an existing installing that was working just fine as follows:

• Pole mounted dish with Slimeline -5S (Swm)
• PI-21 Power Inserter
• Cable run of around 150ft (needed to gain LOS)
• HR21-100 receiver

Aligning and dithering dish with:

• Accutrac III+
• ASL-1 splitter

Started receiving a 771A error. Have performed the following troubleshooting steps:

• Checked/replaced all RG6 compression, barrel and grounding connectors
• Replaced out power inserter, direct to outlet, various outlets.
• Re-aligned and peaked the dish
• Swapped out the 5S SWM integrated LNB
• Ran a new temporary line with PerfectVision RG6 cable solid copper center conductor swept tested to 3Ghz

Lost the 771A, but getting the 771 error code. Still getting no signal in my meter at the end of the run. I am getting 21v on my voltmeter, so seems like current is passing through the line. As I shorten the length of the cable run I start to gain signal strength, but not enough to acquire the satellites via the tuner or be practical in this installation.

Anyone have an idea of other things to try and troubleshoot here?

Thanks!!

 

[veryoldschool]

150' may be a bit much for the 21 volt PI, so I'd try the 29 volt PI.
Measuring the voltage without a load [the SWiMLNB] connected doesn't give you a valid measurement, since there isn't the current draw which is where the voltage drop comes from.

 

[gweegz]

Thanks for the reply, veryoldschool.

I thought the same thing about the long run, but let me restate that this whole thing used to work just fine!

I'm pretty sure I tested the voltage with the SWiMLNB connected, but I will double check that.

 

[veryoldschool]

Thanks for the reply, veryoldschool.

I thought the same thing about the long run, but let me restate that this whole thing used to work just fine!

I'm pretty sure I tested the voltage with the SWiMLNB connected, but I will double check that.

It may have been borderline, but that would bring up the question of "what has aged/changed?"
Is there a splitter you haven't mentioned?
A SWiM can feed a receiver at almost 200', but this gets reduced by splitter losses.

Doing some "quick math", suggests the 21 volt PI through 150' of RG6, will end up having only about 16-17 volts to the SWiMLNB, where the 29 volt would still have 24 volts. This makes the most sense as to the problem, and what might have changed too.

 

[gweegz]

Ok, update. Swapped in the 29V power inserter. No affect in remedy of the signal loss. I'll offer some more info.
The Accutrac III/ASL-1 setup meter reads 77.2 on the 101 bird over a 10' run. Drops to 50.1 on the 101 on a 50' run. This is with the 29v PI. Both runs have no barrel or ground connectors and I've replaced all RG6 connector and tried new cable runs. Still, there is something sucking down the signal level. Ran the 50' run into the receiver Ns still get a 771 searching for signal. Interesting note, that I do get stronger readings with my old LNB than the new one. This one has me stumped! Any ideas out there?

Many thanks.

 

[veryoldschool]

Ok, update. Swapped in the 29V power inserter. No affect in remedy of the signal loss. I'll offer some more info.
The Accutrac III/ASL-1 setup meter reads 77.2 on the 101 bird over a 10' run. Drops to 50.1 on the 101 on a 50' run. This is with the 29v PI. Both runs have no barrel or ground connectors and I've replaced all RG6 connector and tried new cable runs. Still, there is something sucking down the signal level. Ran the 50' run into the receiver Ns still get a 771 searching for signal. Interesting note, that I do get stronger readings with my old LNB than the new one. This one has me stumped! Any ideas out there?

Many thanks.

With a SWiM LNB, you're measuring the SWiM signal, not the SAT signal.
Your 77.2 dBµV is 31.8 dBm, which is the output of the SWiM as it's controlled by an AGC.
50' of RG6 has a loss of 3-4 dB, so you should be reading 72 dBµV.
You need to find where this coax is bad, as even RG59 would have only about 6 dB of loss.