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manuelchk

PSC Antenna Distro

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So I have received the second unit and I’m having the same issue with them:

 

I’m using Wisycom receivers and RFVenue diversity antenna.  

 

So these are the tests I’ve run:

 

If I connect the receiver to the antenna distro and RFVenue diversity antenna I don’t get any clean freq, the cleanest is around 9db noise floor which it’s unacceptable.

 

If I connect the receiver directly to the diversity antenna the scan comes clean giving me a noise floor of -2db.

 

When using the whips for all my receivers I get a clean scan also.

 

I tried a different antenna distro from a friend and also got clean scans...

 

So I thought it was mine, so I returned it and got a new one but I’m having the same issues... 

 

Did anyone have issues with these units?

 

Thanks in advance.

6E9E2E71-62A3-44E3-BEBD-C6F4F6095953.jpeg

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3 hours ago, r.paterson said:

6-8db gain on PSC distro which lifts your noise floor by same amount..

Don't forget the input noise figure of the PSC amp. A quiet amp with any input filtering will have at least a 2 dB equivalent input noise figure. With the gain numbers given, that will put you at an output noise floor of 8 to 10 dB, which is strangely equal to what Manuelchk is seeing. Sometimes the numbers do add up.

Best Regards,

Larry Fisher

p.s. PSC doesn't give a gain figure on their site. Gain in a distribution amp (input to any output) is not generally a good thing. The quoted noise figure (0.8 dB) is awfully low and would be a very good number for an ideally matched amp on the bench. Maybe not so good in the field. 

 

Edited by LarryF
Info from PSC site

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I'm using the PSC distro connected to 2 SRb and 2 SNA600. i also noticed a raise in the noise floor but not as much as you. I haven't used it enough yet to say if the range has improved a lot or not. Would love to hear feedback from other user with more or less the same setup.

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I suspect that if you just try it it will work fine. The Wisycoms maybe have higher resolution in RF metering than Lectro so you’re just “seeing” more of the noise floor. 

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@Ron Meyer does great work and as an early adopter of the Rf Multi Sma, I can say that it performs exceedingly well. I’ve done some crazy shows that couldn’t have been done at all without it! Take it out into the field and report back. Does the increased noise floor make a difference?

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So the conclusion was that the two units were not working properly, weird tho, I talked to PSC and that never happened before to them, I’m now using a new dual band version of the PSC 470-618 and the 900 and I’m super happy with it.

 

Attached two pictures of the two scans with exactly the same setup but different PSC units, check the difference in noise floor for the same selected frequency.

 

Thanks again for your comments.

Manuel.

181EBD99-1C4B-4C28-8A2F-570E59166B1B.jpeg

B201EED2-F030-435D-8148-0F67DF8694C4.jpeg

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Got a similar issue using the DADM from Audio Wireless with two Dipole from Lectrosonics and Audio Limited A10. It seems that the noise floor is higher when using the DADM. Got excellent support from Audio Wireless after sending in the unit. It will arrive back this week but they told me that the unit is fine. Next thing I will try is to use better cables. 

 

The new cables are better shielded RG316, the old ones were poorly manufactured RG174. They also told me that one cable had a short. Do you use devices to test you RF cables? 

 

haha....never stop improving the wireless system =)

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1 hour ago, locationsoundvie said:

Got a similar issue using the DADM from Audio Wireless with two Dipole from Lectrosonics and Audio Limited A10. It seems that the noise floor is higher when using the DADM. Got excellent support from Audio Wireless after sending in the unit. It will arrive back this week but they told me that the unit is fine. Next thing I will try is to use better cables. 

I’d love to know if you resolve this issue. I’m running into the same thing with the DADM 226 and can’t seem to figure it out. I’ve tried so many different rf shorties and the noise floor remains higher than it should be.

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4 hours ago, locationsoundvie said:

trey do you use it with the a10 too?

 

I typically use it with Lectrosonics src’s, but have used it with a friend’s a10 and zaxcom receivers. The noise floor is the same across the board. I’d really love to get it working optimally because it’s an awesome distro that has made my bag so tidy.

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