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openplotter / openplotter-sdr-vhf

Suite of applications for SDR reception in VHF range
GNU General Public License v3.0
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Setting Gain is preventing automatic Gain-Control #1

Closed hwater closed 4 years ago

hwater commented 4 years ago

Hello

i use an RTL - Stick with automatic gain control, but having to set an value to the "AIS Settings" disables it.

Here is my tested Setting:

/usr/bin/rtl_ais -d 0 -p 0 -P 10110 Found 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM Edge tuning disabled. DC filter enabled. RTL AGC disabled. Internal AIS decoder enabled. Buffer size: 163.84 mS Downsample factor: 64 Low pass: 25000 Hz Output: 48000 Hz Found Rafael Micro R820T tuner Log NMEA sentences to console OFF AIS data will be sent to 127.0.0.1 port 10110 Tuner gain set to automatic. Tuned to 162000000 Hz. Sampling at 1600000 S/s. Allocating 12 zero-copy buffers

These are your "AIS Setting": the Gain-value can`t stay empty, so using zero here:

/usr/bin/rtl_ais -d 0 -p 0 -g 0 -P 10110 Found 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM Edge tuning disabled. DC filter enabled. RTL AGC disabled. Internal AIS decoder enabled. Buffer size: 163.84 mS Downsample factor: 64 Low pass: 25000 Hz Output: 48000 Hz Found Rafael Micro R820T tuner Log NMEA sentences to console OFF AIS data will be sent to 127.0.0.1 port 10110 Tuner gain set to 0.00 dB. Tuned to 162000000 Hz. Sampling at 1600000 S/s. Allocating 12 zero-copy buffers

I would like to use this Feature of the Device, so please add an Checkbox to omit the "-g 0" from the openplotter-rtl_ais.service Routine. Maybe name the Checkbox "enable Automatic Tuner Gain" or do this hidden if the user leaves the Gain-value empty. Of Couse, not every SDR-Stick has this automatic Feature, most of my old ones work with gain > 30.

Otherwise - Great Work, Holger

sailoog commented 4 years ago

You are right. Maybe adding a text "leave blank to set auto" could work.

hwater commented 4 years ago

sounds okay, less disturbing to others.

sailoog commented 4 years ago

closed by https://github.com/openplotter/openplotter-sdr-vhf/commit/0e9872173335d562ea5f97408234e1e3771c38ab