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ha7ilm / openwebrx

Open source, multi-user SDR receiver software with a web interface
https://sdr.hu/openwebrx
GNU Affero General Public License v3.0
986 stars 471 forks source link

Setting shift for use with Up-Converter? #15

Closed bogstandard closed 8 years ago

bogstandard commented 8 years ago

Hi,

I'm currently using an up-converter (Ham It Up v1.3) to receive signals.

The "Shift" I use within SDR# to have these display correctly is -124,991,371 (screenshot), though the recommended amount is -125,000,000.

Without this shift signals are only accessible at ~125MHz + actual signal frequency, which means the frequencies displayed on my OpenWebRX client UI are ~125MHz above what they really are.

For example: To set the centre frequency of the OpenWebRX to 5505180Hz I have to put 130496551 (124,991,371Hz higher!) as center_freq in config.webrx.py, which allows tuning but displays the incorrect frequencies.

Does OpenWebRX have the ability to implement a shift so that it can work nicely with an UpConverter?

I hope this makes sense, any help is very much appreciated.

ha7ilm commented 8 years ago

Hi,

There is an option called shown_center_freq in config_webrx.py, over here.

For example, in your application:

center_freq = 130496551
shown_center_freq = 5505180
bogstandard commented 8 years ago

Excellent, many thanks.