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Document LO offset options

This commit is contained in:
Jon Beniston 2020-10-25 20:08:57 +00:00
parent 035a0ab2cb
commit 35380d4f36
2 changed files with 8 additions and 0 deletions
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4
plugins/samplesink/usrpoutput/readme.md
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@ -105,6 +105,10 @@ Use this slider to adjust the global gain of the Tx chain. The allowable values
This is the Tx hardware filter bandwidth in kHz in the AD936x device for the given channel. Use the wheels to adjust the value. Pressing shift simultaneously moves digit by 5 and pressing control moves it by 2.
<h3>Tx LO offset</h3>
This adjusts the Tx local oscillator (LO) frequency from the centre frequency by the given amount in kHz, and the NCOs are used to digitally shift the signal to the set centre frequency. This can be used to push the Tx LO leakage (which for the AD396x is -50dBc) out of band. The shift should be less than half of the sample rate.
<h3>12: Stream status indicator</h3>
This label turns green when data has been transmitted to the device.

4
plugins/samplesource/usrpinput/readme.md
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@ -118,6 +118,10 @@ Check this button to enable IQ imbalance correction.
This is the Rx hardware IF filter bandwidth in kHz for the given channel. Use the wheels to adjust the value. Pressing shift simultaneously moves digit by 5 and pressing control moves it by 2.
<h3>Rx LO offset</h3>
This adjusts the Rx local oscillator (LO) frequency from the centre frequency by the given amount in kHz, and the NCOs are used to digitally shift the signal to compensate. The shift should be less than half of the sample rate.
<h3>15: Stream status indicator</h3>
This label turns green when data is being received from the device.