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NFM demod: new UI documentation

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f4exb 2017-06-10 19:16:26 +02:00
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plugins/channelrx/demodnfm/readme.md
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@ -8,36 +8,36 @@ This plugin can be used to listen to a narrowband FM modulated signal. "Narrowba
![NFM Demodulator plugin GUI](../../../doc/img/NFMdemod_plugin.png) ![NFM Demodulator plugin GUI](../../../doc/img/NFMdemod_plugin.png)
<h3>1: <s>Frequency shift from center frequency of reception direction</s></h3> <h3>1: Frequency shift from center frequency of reception value</h3>
The "+/-" button on the left side of the dial toggles between positive and negative shift.
<h3>2: Frequency shift from center frequency of reception value</h3>
Use the wheels to adjust the frequency shift in Hz from the center frequency of reception. Right click on a digit sets all digits on the right to zero. This effectively floors value at the digit position. Wheels are moved with the mousewheel while pointing at the wheel or by selecting the wheel with the left mouse click and using the keyboard arroews. Pressing shift simultanoeusly moves digit by 5 and pressing control moves it by 2. Left click on a digit sets the cursor position at this digit. Use the wheels to adjust the frequency shift in Hz from the center frequency of reception. Right click on a digit sets all digits on the right to zero. This effectively floors value at the digit position. Wheels are moved with the mousewheel while pointing at the wheel or by selecting the wheel with the left mouse click and using the keyboard arroews. Pressing shift simultanoeusly moves digit by 5 and pressing control moves it by 2. Left click on a digit sets the cursor position at this digit.
<h3>3: Channel power</h3> <h3>2: Channel power</h3>
Average total power in dB relative to a +/- 1.0 amplitude signal received in the pass band. Average total power in dB relative to a +/- 1.0 amplitude signal received in the pass band.
<h3>4: Level meter in dB</h3> <h3>3: Level meter in dB</h3>
- top bar (green): average value - top bar (green): average value
- bottom bar (blue green): instantaneous peak value - bottom bar (blue green): instantaneous peak value
- tip vertical bar (bright green): peak hold value - tip vertical bar (bright green): peak hold value
<h3>5: RF bandwidth</h3> <h3>4: RF bandwidth</h3>
This is the bandwidth in kHz of the channel signal before demodulation. It can be set in steps as 5, 6.25, 8.33, 10, 12.5, 15, 20, 25 and 40 kHz. This is the bandwidth in kHz of the channel signal before demodulation. It can be set in steps as 5, 6.25, 8.33, 10, 12.5, 15, 20, 25 and 40 kHz.
<h3>6: AF bandwidth</h3> <h3>5: AF bandwidth</h3>
This is the bandwidth of the audio signal in kHz (i.e. after demodulation). It can be set in continuous kHz steps from 1 to 20 kHz. This is the bandwidth of the audio signal in kHz (i.e. after demodulation). It can be set in continuous kHz steps from 1 to 20 kHz.
<h3>7: Volume</h3> <h3>6: Volume</h3>
This is the volume of the audio signal from 0.0 (mute) to 10.0 (maximum). It can be varied continuously in 0.1 steps using the dial button. This is the volume of the audio signal from 0.0 (mute) to 10.0 (maximum). It can be varied continuously in 0.1 steps using the dial button.
<h3>7: Delta/Level squelch</h3>
Use this button to toggle between AF (on) and RF power (off) based squelch.
<h3>8: Squelch threshold</h3> <h3>8: Squelch threshold</h3>
This is the squelch threshold in dB. The average total power received in the signal bandwidth before demodulation is compared to this value and the squelch input is open above this value. It can be varied continuously in 0.1 dB steps from 0.0 to -100.0 dB using the dial button. This is the squelch threshold in dB. The average total power received in the signal bandwidth before demodulation is compared to this value and the squelch input is open above this value. It can be varied continuously in 0.1 dB steps from 0.0 to -100.0 dB using the dial button.