110129 VE3ERX - work on Saturday afternoon
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I am going to the site to check the repeater. It seems a little "hard of hearing."
It will be off the air for a while when I check the performance before I do some tweaking (if needed).
I may also adjust the transmit power again if its needed.
Just a little heads up.
73, Paul - VA3PC
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VE3ERX Test Results
This is going to get a bit technical.....
I first checked the repeater off air with the multicoupler connected.
It had a sensitivity of .33 microvolts at the antenna terminal for 12db SINAD and 22W out.
At the repeater itself it was .21 microvolts and 48 Watts.
That's pretty close for an off the shelf MSR2000 - and the lowest I can get the PA turned down to.
The multicoupler inserts a little over 3db of loss in each direction (spec is 3.2db).
There was very little desense observed (less than .5 db).
I also checked the reflected power from the antenna (22W out / .5W reflected)
There was no time when I had the repeater disconnected that the receive sensitivity dropped way off.
As near as I can tell, the only way to increase receiver sensitivity is with a pre-amp.
I still don't know if we have an antenna intermittent, or possibly some sort of intermod that is causing
the interference.
The software to auto correct the clock has not been released yet, that is still pending on the controller website.
73 Paul
Further.....
I went out today and changed the PA on the repeater. Dan mentioned that when the repeater was in use for a while, it seemed to get progressively more deaf. With that additional tidbit of info (thats tidbit, not timbit) I suspected the PA was getting spurious. And so it was. It was running about 85 watts and wouldn't turn down.
I changed the PA, adjusted it for 40 watts into the multicoupler. Please let me know how its doing over the next few days. 73 Paul