So, an update on the discriminator in the FR5000/FR6000...

Looks like the "Discriminator Out" on the accessory connector isn't true detector audio.

Some schematic snippets:

DET becomes EXDISC which becomes DISC at the accessory connector.

Detector audio from the IF IC looks like it gets buffered and filtered a bit before it hits the accessory connector. Hence, there may not be all the noise we want.

There also is circuitry in there to switch Wide/Narrow, which would be affected by channel programming.

I'm not going to bother to sweep it to see what the response is, as it is already installed at site.

I may swap back to stock squelch and enable BEW to see how that plays.

Lee

On Sun, Jun 5, 2016 at 9:35 AM, Chuck Henderson <rpt2@chuck.midlandsnetworking.com> wrote:

If anyone if off frequency a little bit that will make the voice talk off worse. Double check that the repeater and the users are all on frequency. Don't use narrow bandwidth on the repeater receiver. Make sure that the discriminator audio is not rolled off even a little bit at the high end. There should not be resistors in series or capacitors to ground between the discriminator chip output pin and the voter board input, for best results. I tried DSPBEW a couple of times but don't use it on any of my repeaters.
Did you uncomment line 64 in HardwareProfile.h to get both of my changes?
One change is to the squelch action and the other is to how RSSI is calculated.
Also, I comment out
;thresholds =
and set
linger = 0
in /etc/asterisk/voter.conf
Chuck, WB9UUS

Lee Woldanski, AScT
VE7FET