Measuring the RX noise is done if you intend to use the computer to do the carrier squelch using the dsp mode with raw un squelched discriminator audio. It is measured with no signal into the receiver. Since you have your radio connected with speaker audio there is a hi frequency roll off. The dsp function needs the hi freq. audio (> 3khz) to do the squelch function. With the roll off there is not enough hi freq. to do that. Anyway, you have chosen to let the radio do the squelch so you do not need to do the RXnoise measurement. You only need to inject a full quieting signal with 3K tone to the receiver and do a RXvoice measurement to set the RX level. If you wanted to use the DSP mode to do squelch then you would connect the discriminator to the URI/FOB, set rxdemod =flat, and ctcssfrom=dsp. Then you would do a rxnoise measurement with no signal. That gives the computer a baseline noise level for the squelch. Then you would put a full quieting signal with a 1K tone and do a rxvoice measurement. That give the computer a full quieting signal to set the RX level and to compare the noise level with. Then you would set the dsp squelch with a RXsquelch setting. VA3RQ On 5/23/2016 12:32 AM, kk6ecm wrote:
I believe I am. So guess I don't have to worry about it eh?
Thanks, Bob kk6ecm 73
Sent from iPad
On May 22, 2016, at 8:43 PM, David McGough<kb4fxc@inttek.net> wrote:
Bob,
rxnoise is set using unsquelched, raw discriminator noise; this level should always be much higher than an audio test signal.
Perhaps you're using a full-quieting received signal for the rxnoise source?
73, David KB4FXC
On Sun, 22 May 2016, kk6ecm wrote:
Thanks! Part of the problem was my lack of understanding.
OK... have everything working, but having difficulty understanding the tune function.
radio tune rxnoise tune rxnoise maxtries=12, target=23000, tolerance=2750
radio tune rxvoice target=7200 tolerance=360
I'm passing the rxvoice, but failing the rxnoise. The radio seems to have a lot of noise, however the measured is a small fraction of the modulated signal. But the target for the rxnoise is 3 times the level of the rxvoice... I expected the rxnoise to be much lower than the rxvoice levels, comparable to what I'm measuring. IaxRpt is "measuring" a lot of noise (gree bar is showing strong. What am I missing here with respect to these measurement in the tune? What are the units? Gain? Where rxnoise would require much more gain (target?) than the rxvoice to achieve some level?
Thanks,
Bob, kk6ecm 73
-----Original Message----- From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of REDBUTTON_CTRL Sent: Sunday, May 22, 2016 12:32 PM To: app_rpt-users@ohnosec.org Subject: Re: [App_rpt-users] RX Input Adjust Failed
What is the squelch logic coming out of your radio?
If the line changes, does it go low with signal or no signal? And when it goes low does it pull to ground?
The URI will not see a signal change if only voltage is supplied by the radio. The radio MUST pull the signal to ground on receive or when squelched.
If the radio doesn't pull to ground then you may need to connect an NPN transistor to pull the line to ground. Then set USB radio for usbinvert.
VA3RQ
On 5/22/2016 3:41 PM, kk6ecm wrote: No change... whenever I have ctcssfrom=no, the PTT on the URIx is active, and app_rpt won't take DTMF commands. When I switch back to ctcssfrom=usbinvert, all works normally, however, that configuration does not work with my substitute receiver.
Thanks, Bob kk6ecm 73
-----Original Message----- From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of REDBUTTON_CTRL Sent: Sunday, May 22, 2016 11:21 AM To: app_rpt-users@ohnosec.org Subject: Re: [App_rpt-users] RX Input Adjust Failed
Comment out the ctcss tones listed. J
On 5/22/2016 2:35 PM, kk6ecm wrote: I discovered app_rpt does not like ctcssfrom=no. Why? (I'm using DIAL).
What am I missing?
Thanks, Bob kk6ecm 73
-----Original Message----- From: kk6ecm [mailto:kk6ecm@gmail.com] Sent: Sunday, May 22, 2016 10:37 AM To: 'app_rpt-users@ohnosec.org' Subject: RX Input Adjust Failed
What could cause the Error: RX Input Adjust Failed?
DONE tries=12, setting=1000, meas=58, sqnoise=13 ERROR: RX INPUT ADJUST FAILED.
No RF input to the radio.
I'm attempting to setup a substitute receiver for testing, but am experiencing difficulty setting it up, and not wanting to make a switch to simpleusb, thus making the minimum number of changes.
The substitute receiver (Yaesu FT-1500M) is detecting CTCSS, with USB COR out, and I'm using the speaker output. (see below conf file)
Any thoughts?
Thanks, Bob kk6ecm 73
from usbradio_tune...
hdwtype=0 rxboost=1 txboost=1 rxctcssrelax=1 txctcssdefault=107.2 rxctcssfreqs=107.2 txctcssfreqs=107.2 ;rxctcssoverride=0 ;carrierfrom=dsp carrierfrom=usb ;dsp ctcssfrom=no ;usbinvert rxdemod=speaker ;flat txprelim=no txlimonly=no txtoctype=notone txmixa=composite txmixb=no invertptt=0 duplex=1 rxondelay=0 rxnoisefiltype=0 eeprom=0
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