Hi there,
I'm testing NovaSDR with RTL-SDR v3 dongle. Everything works well in NORMAL MODE (VHF/UHF) but I don't know hot to configure DIRECT SAMPLING MODE for HF.
Any advise? Thanks.
73 IW7DLE Mario
Ok found the additional setting:
> Add SoapySDR device settings? (key=value) Yes
> Setting key (blank to finish) direct_samp
> Setting value 2
73
It may help others if you posted your receivers.json to show how you did this.
Sure, following the configuration file receivers.json:
{
"receivers": [
{
"id": "rx0",
"input": {
"accelerator": "none",
"audio_compression": "flac",
"audio_sps": 12000,
"brightness_offset": 0,
"defaults": {
"frequency": 14200000,
"modulation": "USB",
"ssb_highcut_hz": 3000,
"ssb_lowcut_hz": 300
},
"driver": {
"channel": 0,
"device": "driver=rtlsdr, label=Generic RTL2832U OEM :: 00000001, manufacturer=Realtek, product=RTL2838UHIDIR, serial=00000001, tuner=Rafael Micro>
"format": "cs16",
"kind": "soapysdr",
"settings": {
"direct_samp": "2"
}
},
"fft_size": 131072,
"frequency": 14175000,
"signal": "iq",
"smeter_offset": 0,
"sps": 1024000,
"waterfall_compression": "zstd",
"waterfall_size": 1024
},
"name": "rtl-sdr"
}
]
}
If you want to control gain, agc etc:
{
"id": "rx4",
"name": "RTL (2M 144-146 MHz)",
"input": {
"sps": 2048000,
"frequency": 145000000,
"signal": "iq",
"fft_size": 131072,
"fft_threads": 1,
"brightness_offset": -6,
"audio_sps": 12000,
"waterfall_size": 2048,
"waterfall_compression": "zstd",
"audio_compression": "flac",
"accelerator": "clfft",
"smeter_offset": -40,
"driver": {"kind": "soapysdr","device": "serial=00000001","channel": 0,"format": "cf32","gain": 44,"agc": false},
"defaults": { "frequency": 145787500, "modulation": "FM" }
}
},
See here, works also for other Soapy receivers.
https://github.com/ON5HB/NovaSDR/blob/main/docs/CONFIG_REFERENCE.md