On first run, fldigi will bring up the user setup page.
Fill this page with your station information.
Sound Card Setup
Note: Generally the preference is to not have the UDRC selected as the primary sound card on the pi for the user session so as to avoid transmitting system sounds. With recent versions of the operating system this may be the only option as the on-board sound may have been disabled. if you select the speaker icon in the upper right corner of the display the check mark will be on the default user device. If more than one device shows make sure the check is not on the udrc. If only the udrc appears you can leave it as is since the GPIO control limits the possibility of transmitting unintended sound, but be aware that you may have unintended transmissions.
Within fldigi - Select Configure/Soundcard
Select the Devices tab:
Select PortAudio and deselect all others
Select udrc: - (hw:0,0) for both Capture and Playback
[For UDRC-II ONLY] If radio is set for 1200 baud you may need to select the Right Channel tab and do the following to get audio.
Check the reverse left/right channels checkbox
Save the configuration
Set up PTT
Select the Configure/Rig Control
Select the GPIO tab
For DRAWS Left mini Din 6 connector
* Check the box for BCM 12 (GPIO 26 and Pin 32) box check the =1 (on) box on the same line.
For UDRCII or DRAWS Right mini Din 6 connector
* Check the box for BCM 23 (GPIO 4 and Pin 16) box and check the = 1 (on) box on the same line.
* Note: to use the 15-pin connector select the options for BCM 12
Note: if using RigCAT or FlRig make sure that the “use cat for PTT” box is not checked on the RigCAT tab.
Save the configuration and close the configuration window
Set the fldigi TX Attenuator to –6.0 (Lower right of fldigi window)
Set output levels
Set up radio
Cable UDRC to radio (6-pin mini din or other)
Radio set to low power
Radio on dummy load for an antenna
Radio set to monitor ALC
Setup levels with alsamixer
Make sure fldigi is not running and set initial UDRC output levels using alsamixer
Press F6 and select the UDRC
Using the arrow keys set
PCM to –26.5 db
Lo Drive to –6 db
With alsamixer running open another terminal window and start fldigi.
Click the “Tune” button in the upper right corner of the window.
Radio should switch to transmit mode with little to no output power and no ALC indication.
Increase PCM until the ALC starts to indicate (on the IC-7000 this is about 2-3 bars of ALC on the digital display).
Exit the alsamixer and save the settings
Use ESC key to exit alsamixer
sudo alsactl store
Settings for IC-7000
PCM: -22.5 db and LO Drive: -6 db which provides approximately 150 mv output for the UDRC.
At this point deselect the tune button and the system is set for the proper SSB output level.
The following notes are included for reference only as FLdigi comes pre-installed on the NWDR image
From a terminal command line, verify that the UDRC™ is recognized by typing the command
(that's a lowercase l) and observe that udrc is listed as a card. If you do not see it listed, power down and remount the UDRC™.
To preset the pins and levels on the UDRC™ we provide a script. Execute the following: