1. udrc@nw-digital-radio.groups.io

Re: Problem with duplicate packets

Doug Kingston
 

So setting channel 0 to 9600 does stop the second decode, but that kind of makes sense since only one modem approach will work for the packet (its 1200 baud).  This seems like a workaround rather then proper isolation of the audio paths and muting the second.

Is there a good block diagram of the UDRC modem and how the Alsa mixer controls map to that functional diagram?

-Doug-

On Sun, Nov 13, 2016 at 2:54 PM, John D Hays - K7VE <john@...> wrote:
Try setting the other channel (0) to 9600 baud.

On Sun, Nov 13, 2016 at 2:39 PM, Doug Kingston <dpk@...> wrote:
Currently only using one channel (Din-6, channel 1 I believe).  I would like to keep the option open to run both in the future.

On Sun, Nov 13, 2016 at 10:36 AM, John D Hays - K7VE <john@...> wrote:
Doug,

There are some things you can do. Are you only using one channel or two?  Which connector?  




On Sun, Nov 13, 2016 at 10:15 AM, Doug Kingston <dpk@...> wrote:
First let me say that the UDRC-II is a great device and paired with the Pi3 makes a really useful wireless TNC and digipeater.  Now form my (albeit minor) problem...

I am having a problem with duplicate packets showing up in the direwolf console.  In this example below (of a two packet exchange) note that the audio level is lower on the second printout of the packet.  Before starting direwolf, I set up the audio levels with the script udrc-setup.sh (script and output below).  My guess at this point is that the mixer is somehow misconfigured and that some of the audio from the Din-6 connector (channel 1) is being sent to channel 0 and so the packet is being decoded twice.  

What does the number in square brackets mean ([1.2] vs [0.4])?
How do I interpret the graphic with | and _?.

Diagnostic output from direwolf during which 2 packets were received by the radio (Icom 207H).

pi@kd7dk-pi:~ $ direwolf -c direwolf.udrc-1200.conf
Dire Wolf version 1.3
Includes optional support for:  gpsd

Reading config file direwolf.udrc-1200.conf
Audio device for both receive and transmit: plughw:CARD=udrc,DEV=0  (channels 0 & 1)
Channel 0: 1200 baud, AFSK 1200 & 2200 Hz, E+, 48000 sample rate / 3.
Channel 1: 1200 baud, AFSK 1200 & 2200 Hz, E+, 48000 sample rate / 3.
Ready to accept AGW client application 0 on port 8000 ...
Ready to accept KISS client application on port 8001 ...
Use -p command line option to enable KISS pseudo terminal.

Now connected to IGate server noam.aprs2.net (198.50.198.139)
Check server status here http://198.50.198.139:14501


Digipeater WW7RA audio level = 73(30/29)   [NONE]   ||||||___
[1.2] KA7RRA-9>T7RWRQ,WW7RA*,WIDE2-1:`2MCl 5>/]"48}=<0x0d>
MIC-E, normal car (side view), Kenwood TM-D710, In Service
N 47 27.2100, W 122 49.3900, 0 MPH, course 25, alt 108 ft

Digipeater WW7RA audio level = 27(13/7)   [NONE]   _|||||||_
[0.4] KA7RRA-9>T7RWRQ,WW7RA*,WIDE2-1:`2MCl 5>/]"48}=<0x0d>
MIC-E, normal car (side view), Kenwood TM-D710, In Service
N 47 27.2100, W 122 49.3900, 0 MPH, course 25, alt 108 ft

Digipeater WIDE2 (probably ERINB) audio level = 64(26/27)   [NONE]   ||||||___
[1.2] KA7RRA-9>T7RWRQ,WW7RA,ERINB,WIDE2*:`2MCl 5>/]"48}=<0x0d>
MIC-E, normal car (side view), Kenwood TM-D710, In Service
N 47 27.2100, W 122 49.3900, 0 MPH, course 25, alt 108 ft

Digipeater WIDE2 (probably ERINB) audio level = 24(11/6)   [NONE]   __||||||_
[0.4] KA7RRA-9>T7RWRQ,WW7RA,ERINB,WIDE2*:`2MCl 5>/]"48}=<0x0d>
MIC-E, normal car (side view), Kenwood TM-D710, In Service
N 47 27.2100, W 122 49.3900, 0 MPH, course 25, alt 108 ft
^C
QRT

udrc-setup.sh:

pi@kd7dk-pi:~ $ cat udrc-setup.sh
#!/bin/bash

amixer -c udrc -s << EOF
#  Set input and output levels to 0dB
#  input
sset 'ADC Level' -6.5dB
#  output
sset 'LO Driver Gain' 28.0dB
sset 'PCM' -41.0dB

#  Turn on AFOUT
sset 'CM_L to Left Mixer Negative Resistor' '10 kOhm'
sset 'IN1_L to Left Mixer Positive Resistor' '10 kOhm'

#  Turn on DISCOUT
sset 'CM_R to Right Mixer Negative Resistor' '10 kOhm'
sset 'IN1_R to Right Mixer Positive Resistor' '10 kOhm'

#  Turn off unnecessary pins
sset 'IN1_L to Right Mixer Negative Resistor' 'Off'
sset 'IN1_R to Left Mixer Positive Resistor' 'Off'
sset 'IN2_L to Left Mixer Positive Resistor' 'Off'
sset 'IN2_L to Right Mixer Positive Resistor' 'Off'
sset 'IN2_R to Left Mixer Negative Resistor' 'Off'
sset 'IN2_R to Right Mixer Positive Resistor' 'Off'
sset 'IN3_L to Left Mixer Positive Resistor' 'Off'
sset 'IN3_L to Right Mixer Negative Resistor' 'Off'
sset 'IN3_R to Left Mixer Negative Resistor' 'Off'
sset 'IN3_R to Right Mixer Positive Resistor' 'Off'

sset 'Mic PGA' off
sset 'PGA Level' 0

# Disable and clear AGC
sset 'ADCFGA Right Mute' off
sset 'ADCFGA Left Mute' off
sset 'AGC Attack Time' 0
sset 'AGC Decay Time' 0
sset 'AGC Gain Hysteresis' 0
sset 'AGC Hysteresis' 0
sset 'AGC Max PGA' 0
sset 'AGC Noise Debounce' 0
sset 'AGC Noise Threshold' 0
sset 'AGC Signal Debounce' 0
sset 'AGC Target Level' 0
sset 'AGC Left' off
sset 'AGC Right' off

# Turn off High Power output
sset 'HP DAC' off
sset 'HP Driver Gain' 0
sset 'HPL Output Mixer L_DAC' off
sset 'HPR Output Mixer R_DAC' off
sset 'HPL Output Mixer IN1_L' off
sset 'HPR Output Mixer IN1_R' off

#  Turn on the LO DAC
sset 'LO DAC' on

#  Turn on AFIN
sset 'LOL Output Mixer L_DAC' on

#  Turn on TONEIN
sset 'LOR Output Mixer R_DAC' on
alsactl save
EOF

Output from running udrc-setup.sh:

root@kd7dk-pi:/home/pi# ./udrc-setup.sh
Simple mixer control 'ADC Level',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 64
  Front Left: 11 [17%] [-6.50dB]
  Front Right: 11 [17%] [-6.50dB]
Simple mixer control 'LO Driver Gain',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 35
  Front Left: 34 [97%] [28.00dB]
  Front Right: 34 [97%] [28.00dB]
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 175
  Mono:
  Front Left: Playback 45 [26%] [-41.00dB]
  Front Right: Playback 45 [26%] [-41.00dB]
Simple mixer control 'CM_L to Left Mixer Negative Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: '10 kOhm'
Simple mixer control 'IN1_L to Left Mixer Positive Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: '10 kOhm'
Simple mixer control 'CM_R to Right Mixer Negative Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: '10 kOhm'
Simple mixer control 'IN1_R to Right Mixer Positive Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: '10 kOhm'
Simple mixer control 'IN1_L to Right Mixer Negative Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: 'Off'
Simple mixer control 'IN1_R to Left Mixer Positive Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: 'Off'
Simple mixer control 'IN2_L to Left Mixer Positive Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: 'Off'
Simple mixer control 'IN2_L to Right Mixer Positive Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: 'Off'
Simple mixer control 'IN2_R to Left Mixer Negative Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: 'Off'
Simple mixer control 'IN2_R to Right Mixer Positive Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: 'Off'
Simple mixer control 'IN3_L to Left Mixer Positive Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: 'Off'
Simple mixer control 'IN3_L to Right Mixer Negative Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: 'Off'
Simple mixer control 'IN3_R to Left Mixer Negative Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: 'Off'
Simple mixer control 'IN3_R to Right Mixer Positive Resistor',0
  Capabilities: enum
  Items: 'Off' '10 kOhm' '20 kOhm' '40 kOhm'
  Item0: 'Off'
Simple mixer control 'Mic PGA',0
  Capabilities: pswitch
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [off]
  Front Right: Playback [off]
Simple mixer control 'PGA Level',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 95
  Front Left: 0 [0%] [0.00dB]
  Front Right: 0 [0%] [0.00dB]
Simple mixer control 'ADCFGA Right Mute',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'ADCFGA Left Mute',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'AGC Attack Time',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 31
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'AGC Decay Time',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 31
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'AGC Gain Hysteresis',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'AGC Hysteresis',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'AGC Max PGA',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 127
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'AGC Noise Debounce',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 31
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'AGC Noise Threshold',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 31
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'AGC Signal Debounce',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 15
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'AGC Target Level',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 7
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'AGC Left',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'AGC Right',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'HP DAC',0
  Capabilities: pswitch
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [off]
  Front Right: Playback [off]
Simple mixer control 'HP Driver Gain',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 35
  Front Left: 0 [0%] [-6.00dB]
  Front Right: 0 [0%] [-6.00dB]
Simple mixer control 'HPL Output Mixer L_DAC',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'HPR Output Mixer R_DAC',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'HPL Output Mixer IN1_L',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'HPR Output Mixer IN1_R',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'LO DAC',0
  Capabilities: pswitch
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [on]
  Front Right: Playback [on]
Simple mixer control 'LOL Output Mixer L_DAC',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'LOR Output Mixer R_DAC',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]

Thanks for your help,
  -Doug-
  KD7DK




--

John D. Hays
K7VE

PO Box 1223, Edmonds, WA 98020-1223
   





--

John D. Hays
K7VE

PO Box 1223, Edmonds, WA 98020-1223
   
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