NovaSDR Support Forum

General Category => General Discussion => Topic started by: tuvok on 03 Jan 2026, 18:54

Title: yellow Waterfall
Post by: tuvok on 03 Jan 2026, 18:54
can anybody tell me what can i do per default that the waterfall is not yellow on my SDR?

it will only run, when i enable the "Auto Adjust" and i get the blue background
this is on the Config

{
  "receivers": [
    {
      "id": "rx0",
      "input": {
        "accelerator": "none",
        "audio_compression": "flac",
        "audio_sps": 12000,
        "brightness_offset": 0,
        "defaults": {
          "frequency": -1,
          "modulation": "FM"
        },
        "driver": {
          "antenna": "Sirio GPE27 5/8",
          "channel": 0,
          "device": "driver=rtlsdr, label=Generic RTL2832U OEM :: 00000001, manufacturer=RTLSDRBlog, product=Blog V4, serial=00000001, tuner=Rafael Micro R828D",
          "format": "cf32",
          "agc": false,
          "gain": 30.0,
          "kind": "soapysdr"
        },
        "fft_size": 131072,
        "frequency": 27500000,
        "signal": "iq",
        "smeter_offset": 0,
        "sps": 2048000,
        "waterfall_compression": "zstd",
        "waterfall_size": 1024
      },
      "name": "11m RTL-SDR Blog V4"
    },
Title: Re: yellow Waterfall
Post by: Bas ON5HB on 03 Jan 2026, 19:17
Lower the gain setting, and or change receivers.json to make it less bright.

All docs are here: https://github.com/Steven9101/NovaSDR/tree/main/docs

See this doc: https://github.com/Steven9101/NovaSDR/blob/main/docs/CONFIG.md

Play with: "brightness_offset": 0,

Or edit the gain.
Title: Re: yellow Waterfall
Post by: tuvok on 03 Jan 2026, 19:39
QuotePlay with: "brightness_offset": 0,

this was the Point thanks i have set it to -5 and it run :)