This page attempt to document the low-bandwidth disaster recovery mesh (DisasterRadio).
UHD gain selection
Should list the gain range for the TX or RX frontend of choice.
E.g. for the WBX TX frontend you get:
Gain range PGA0: 0.0 to 25.0 step 0.1 dB
Make sure you're not looking at the gain range for TX when you're looking to receive or vice-versa, as the won't necessarily be the same!
GNU Radio UHD device selection
For a USRP 1 this should be in the form: serial=<hex_serial>. E.g:
To find device serial run:
You're looking for output that looks like:
| _____________________________________________________ | / | | Mboard: USRP1 | | serial: 24e6b31a
To set the sub-device (the daughterboard and channel) use the format:
This slot_name and daughterboard_frontend_id are also findable with the command:
The output you're looking for looks like:
| | _____________________________________________________ | | / | | | RX Dboard: B | | | ID: WBX, WBX + Simple GDB (0x0053) | | | _____________________________________________________ | | | / | | | | RX Frontend: 0 | | | | Name: WBXv2 RX+GDB | | | | Antennas: TX/RX, RX2, CAL | | | | Sensors: lo_locked | | | | Freq range: 68.750 to 2200.000 Mhz | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB | | | | Connection Type: IQ | | | | Uses LO offset: No
Specifically the lines:
| | | RX Dboard: B
| | | | RX Frontend: 0
Together making up the B:0.
For command-line python scripts
For command line scripts, device and sub-device is often specified with the --args and --spec arguments. E.g:
my_script.py --args serial=24e6b31a --spec B:0
This syntax may vary from script to script, but this is the most common syntax.
For GNU Radio Companion
For the "UHD: USRP Sink" in the latest version of grc (as of this writing) the field "Device Addr" would be set to e.g. serial=24e6b31a and the field "Mb0: Subdev Spec" would be set to e.g. "B:0".