The RX audio being fed into your allstarlink node URI is too loud. The target for RX noise is 27000, whereas your levels were a continuous 32767..... which is rather odd as each measurement is exactly the same. Curious, why are you using DSP for valid RX signal detection? The BridgeCom repeater has a COR/COS/CAS/whatever output for when a valid RX signal is present. ~Benjamin, KB9LFZ On Tue, 2017-06-13 at 22:08 -0400, Ramesh Dhami wrote:

Hi Guys:

One of my repeaters, using usbradio, is failing 'radio tune rxnoise'.

The raw discrim' output from the Bridgecom BCM220 RX is 100mV pk-pk. In usbradio.conf, I have rxboost set to 1 (20dB attenuator removed).

The symptom that I am seeing (or hearing) is that the repeater has a hard time distinguishing a weak / noisy signal from "noise".

This is what I see in the asterisk CLI when attempting a 'radio tune rxnoise'

tune rxnoise maxtries=12, target=27000, tolerance=2750 tries=0, setting=2, meas=32767 tries=1, setting=2, meas=32767 tries=2, setting=2, meas=32767 tries=3, setting=2, meas=32767 tries=4, setting=1, meas=32767 tries=5, setting=1, meas=32767 tries=6, setting=1, meas=32767 tries=7, setting=1, meas=32767 tries=8, setting=1, meas=32767 tries=9, setting=1, meas=32767 tries=10, setting=1, meas=32767 tries=11, setting=1, meas=32767 DONE tries=12, setting=63, meas=32767, sqnoise=24631 ERROR: RX INPUT ADJUST FAILED.

Unless I am mistaken the above seems to suggest that the ADC is saturated, meaning too much signal??

I can try to set rxboost to 0 - but of course, this will mess up my rxvoice calibration (assuming that the rxnoise passes). Is there a mathematical operation I can apply to the rxvoice setting in the radio_tune file to compensate for the 20dB attenuation? (the repeater is at a remote location, which I will not be returning to for another 2 weeks or so).

My usbradio_tune file currently shows:

[usb_2424] ; name=usb_2424 ; devicenum=2 devstr=1-1.3:1.0 rxmixerset=125 txmixaset=70 txmixbset=300 rxvoiceadj=0.316923 rxctcssadj=0.227263 txctcssadj=300 rxsquelchadj=400 fever=1

Cheers!

Ramesh.

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