Massive UI revamping (v7): Channel window documentation. Show device type name in index tooltip

2026-06-05 15:34:57 -04:00 · 2022-04-17 10:20:07 +02:00
parent 40e34bdebd
commit 2c070f811e
58 changed files with 317 additions and 44 deletions
@@ -8,6 +8,8 @@ This MIMO transmission only (MO) plugin can be used to drive a 2 channel MO devi

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Beam steering CW plugin GUI](../../../doc/img/BeamsteeringCWMod_plugin.png)

 <h3>1: Channel output</h3>
@@ -6,6 +6,8 @@ This MIMO reception only (MI) plugin can be used to study phase difference betwe

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Interferometer plugin GUI](../../../doc/img/Interferometer_plugin.png)

 The interface is divided in 3 sections that will be detailed next:
@@ -24,6 +24,8 @@ The same waveforms can be used to trigger the scope trace

 <h2>B. General interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Channel Analyzer NG plugin GUI](../../../doc/img/ChAnalyzerNG_plugin.png)

 The interface is essentially divided in the following sections
@@ -16,6 +16,8 @@ The ADS-B plugin can send aicraft for display on the [Map Feature](../../feature

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![ADS-B Demodulator plugin settings](../../../doc/img/ADSBDemod_plugin_settings.png)

 <h3>1: Frequency shift from center frequency of reception value</h3>
@@ -16,6 +16,8 @@ The AIS specification is ITU-R M.1371-5: https://www.itu.int/dms_pubrec/itu-r/re

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![AIS Demodulator plugin GUI](../../../doc/img/AISDemod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -6,6 +6,8 @@ This plugin can be used to listen to a narrowband amplitude modulated signal. "N

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![AM Demodulator plugin GUI](../../../doc/img/AMDemod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -40,7 +42,7 @@ If you right click on it it will open a dialog to select the audio output device

 <h3>7:Bandpass boxcar filter toggle</h3>

-Use this button to enable or disable the bandpass boxcar (sharp) filter with low cutoff at 300 Hz and high cutoff at half the RF bandwidth. This may help readability of low signals on air traffic communications but degrades audio on comfortable AM broadcast transmissions. 
+Use this button to enable or disable the bandpass boxcar (sharp) filter with low cutoff at 300 Hz and high cutoff at half the RF bandwidth. This may help readability of low signals on air traffic communications but degrades audio on comfortable AM broadcast transmissions.

 <h3>8: RF bandwidth</h3>

@@ -18,6 +18,8 @@ The status of the NOAA POES satellites is available at: https://www.ospo.noaa.go

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![APT Demodulator plugin GUI](../../../doc/img/APTDemod_plugin_settings.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -69,7 +71,7 @@ This includes:
   - Whether to automatically save images on LOS.
   - Whether a combined image including telemetry should be saved.
   - Whether separate images of channel A and B, without telemetry, should be saved.
-   - Whether equidistant cylindrical (plate carrée) project images used for the map, should be saved.
+   - Whether equidistant cylindrical (plate carr�e) project images used for the map, should be saved.
   - Path to save automatically saved images in.
   - The minimum number of scanlines required to be in an image, after noise cropping, for it to be automatically saved.
   - After how many scanlines image processing is applied and updates sent to the map. Lower values require more CPU power.
@@ -10,6 +10,8 @@ Experimental modes with smaller number of lines and FPS values can be used in co

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![ATV Demodulator plugin GUI](../../../doc/img/ATVDemod_plugin.png)

 The interface is divided into three collapsable sections:
@@ -6,6 +6,8 @@ This plugin can be used to listen to a Broadcast FM modulated signal (BFM). In a

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![BFM Demodulator plugin GUI](../../../doc/img/BFMDemod_plugin.png)

 The main three areas are:
@@ -23,6 +23,8 @@ Note: this plugin is officially supported since version 6.

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![ChirpChat Demodulator plugin GUI](../../../doc/img/ChirpChatDemod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -8,6 +8,8 @@ The DAB demodulator uses a sample rate of 2.048MHz.

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![DAB Demodulator plugin GUI](../../../doc/img/DABDemod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -18,6 +18,8 @@ The whole bandwidth available to the channel is used. That is it runs at the dev

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![DATV Demodulator plugin GUI](../../../doc/img/DATVDemod_plugin.png)

 <h3>A: RF settings</h3>
@@ -52,6 +52,8 @@ For software built from source if you choose to have `mbelib` support you will n

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![DSD Demodulator plugin GUI](../../../doc/img/DSDdemod_plugin.png)

 <h3>A section: settings</h3>
@@ -8,6 +8,8 @@ This plugin can be used to demodulate a signal following the [FreeDV digital voi

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![FreeDV Demodulator plugin GUI](../../../doc/img/FreeDVDemod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -21,7 +23,7 @@ Average total power in dB relative to a +/- 1.0 amplitude signal received in the
 <h3>3: Manual re-synchronization</h3>

 This works only for the presently disabled 700D mode. Use this push button to force loosing and re-acquiring synchronisation.
-  
+
 <h3>4: FreeDV mode</h3>

 Use this combo box to select which FreeDV standard is used. The following are supported:
@@ -30,7 +32,7 @@ Use this combo box to select which FreeDV standard is used. The following are su
  - `1600`: OFDM (16 QPSK carriers) narrowband (1.4 kHz) with 700 b/s compressed voice
  - `800XA`: FSK-4 narrowband (2 kHz) with 700 b/s compressed voice
  - `700C`: Another OFDM (14 QPSK carriers) narrowband (1.5 kHz) mode with 700 b/s compressed voice
-  
+
 <h3>5: Level meter in dB</h3>

  - top bar (green): average value
@@ -86,7 +88,7 @@ The transmitted signal is further decimated by a power of two before being appli
  - 4: 6 kHz (2400A) or 1 kHz (other modes)
  - 8: 3 kHz (2400A) or 0.5 kHz (other modes)
  - 16: 1.5 kHz (2400A) or 0.25 kHz (other modes)
-  
+
 <h3>9: Spectrum display</h3>

 This is the spectrum display of the analog signal that enters the modem before AGC and volume control. Controls on the bottom of the panel are identical to the ones of the main spectrum display. It should be optimally centered using the frequency offset control (1) depending on the expected FreeDV mode:
@@ -6,6 +6,8 @@ This plugin can be used to listen to a narrowband FM modulated signal. "Narrowba

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![NFM Demodulator plugin GUI](../../../doc/img/NFMdemod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception value</h3>
@@ -6,6 +6,8 @@ This plugin can be used to demodulate packet radio (APRS/AX.25) data packets. Re

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Packet Demodulator plugin GUI](../../../doc/img/PacketDemod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -6,6 +6,8 @@ This plugin can be used to demodulate POCSAG pager messages.

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Pager Demodulator plugin GUI](../../../doc/img/PagerDemod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -4,12 +4,14 @@

 This plugin can be used to demodulate RS41 radiosonde weather balloon signals. Radiosondes typically transmit on 400-406MHz and are in the sky around the world for around 1 hour around 00:00 UTC.

-RS41 radiosondes transmit data frames every second, containing position, velocity and PTU (Pressure, Temperature and Humidity) readings. The radios use GFSK modulation, with ±2.4kHz deviation at 4,800 baud. Reed Solomon encoding is used for ECC (Error Checking and Correction).
+RS41 radiosondes transmit data frames every second, containing position, velocity and PTU (Pressure, Temperature and Humidity) readings. The radios use GFSK modulation, with �2.4kHz deviation at 4,800 baud. Reed Solomon encoding is used for ECC (Error Checking and Correction).

 The Radiosonde demodulator can forward received data to the [Radiosone feature](../../feature/radiosonde/readme.md), which can plot charts showing how altitude and PTU vary over time, and also plot the position of the radiosonde on the 2D and 3D maps.

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Radiosonde Demodulator plugin GUI](../../../doc/img/RadiosondeDemod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -81,18 +83,18 @@ The received frames table displays information about each radiosonde frame recei
 * Serial - The serial number of the radiosonde. Double clicking on this column will search for the radiosone on https://sondehub.org/
 * Frame - Frame number
 * Phase - Flight phase: On ground, Ascent and Descent.
-* Lat (°) - Latitude in degrees, North positive. Double clicking on this column will search for the radiosonde on the Map.
-* Lon (°) - Longitude in degrees, East positive. Double clicking on this column will search for the radiosonde on the Map.
+* Lat (�) - Latitude in degrees, North positive. Double clicking on this column will search for the radiosonde on the Map.
+* Lon (�) - Longitude in degrees, East positive. Double clicking on this column will search for the radiosonde on the Map.
 * Alt (m) - Altitude in metres.
 * Spd (km/h)  - Speed over ground in kilometres per hour.
 * VR (m/s) - Vertical climb rate in metres per second.
-* Hdg (°) - Heading in degrees.
+* Hdg (�) - Heading in degrees.
 * P (hPA) - Air pressure in hectopascals. Not all RS41s include a pressure sensor. A value ending with 'U' indicates a uncalibrated estimate and may be inaccurate.
-* T (°C) - Air temperature in degrees Celsius.  A value ending with 'U' indicates a uncalibrated estimate and may be inaccurate.
+* T (�C) - Air temperature in degrees Celsius.  A value ending with 'U' indicates a uncalibrated estimate and may be inaccurate.
 * U (%) - Relative humidity in percent.  A value ending with 'U' indicates a uncalibrated estimate and may be inaccurate.
 * Bat (V) - Battery voltage in Volts.
 * Bat - Battery status: OK or low.
-* PCB (°C) - Temperature of PCB.
+* PCB (�C) - Temperature of PCB.
 * PWM (%) - Humidity sensor heater PWM (Pulse Width Modulation) setting, in percent.
 * TX (%) - Transmit power in percent.
 * Max SF - Maximum subframe number.
@@ -6,6 +6,8 @@ This plugin can be used to listen to a single sideband or double sidebands modul

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![SSB Demodulator plugin GUI](../../../doc/img/SSBDemod_plugin.png)

 &#9758; In order to toggle USB or LSB mode in SSB mode you have to set the "BW" in channel filter cutoff control (9) to a positive (USB) or negative (LSB) value. The above screenshot shows a LSB setup. See the (8) to (10) paragraphs below for details.
@@ -16,6 +16,8 @@ Note that for aircraft, there is typically a direct line-of-sight to the VOR. Th

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![VOR Demodulator plugin GUI](../../../doc/img/VORDemod_plugin.png)

 <h3>1: Level meter in dB</h3>
@@ -18,6 +18,8 @@ Several instances of this plugin can be created to monitor multiple VORs and col

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![VOR Demodulator plugin GUI](../../../doc/img/VORDemodSC_plugin.png)

 <h3>1: Frequency shift from center frequency of reception value</h3>
@@ -6,6 +6,8 @@ This plugin can be used to listen to a wideband or narrowband FM modulated signa

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![WFM Demodulator plugin GUI](../../../doc/img/WFMDemod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -18,6 +18,8 @@ If a filename is given with an extension different of `.sdriq` or `.wav` then th

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![File Sink plugin GUI](../../../doc/img/FileSink_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -8,6 +8,8 @@ This plugin can be used to track the center frequency of a carrier. It will try

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Frequency Tracker plugin GUI](../../../doc/img/FreqTracker_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -16,6 +16,8 @@ Note that because it uses only the channelizer half band filter chain to achieve

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Local sink channel plugin GUI](../../../doc/img/LocalSink.png)

 <h3>1: Decimation factor</h3>
@@ -10,6 +10,8 @@ The noise figure will vary with frequency and gain settings. Typically, the nois

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Noise figure plugin GUI](../../../doc/img/NoiseFigure_plugin.png)

 <h3>1: Measurement frequency shift from center</h3>
@@ -90,6 +90,8 @@ Where:

 <h2>1: Settings</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Settings GUI](../../../doc/img/RadioAstronomy_Settings.png)

 <h3>1.1: Frequency shift from center frequency of reception</h3>
@@ -17,6 +17,8 @@ Although the atomic clocks used to transmit the timecode are extremely accurate,

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Radio clock plugin GUI](../../../doc/img/RadioClock_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -10,6 +10,8 @@ The plugin will be built only if the [CM256cc library](https://github.com/f4exb/

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Remote sink channel plugin GUI](../../../doc/img/RemoteSink.png)

 <h3>1: Decimation factor</h3>
@@ -19,6 +19,8 @@ It adds a dependency to the [libsigmf library](https://github.com/f4exb/libsigmf

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![SigMF File Sink plugin GUI](../../../doc/img/SigMFFileSink_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -12,6 +12,8 @@ This plugin is available for Linux and Mac O/S only.

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![UDP Sink plugin GUI](../../../doc/img/UDPsink_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -30,7 +32,7 @@ Total power in dB relative to a +/- 1.0 amplitude signal sent over UDP.

 These parameters are set with the basic channel settings dialog. See: [here](https://github.com/f4exb/sdrangel/blob/master/sdrgui/readme.md#6-channels)

-The display is in the format `address:audio port/data port` 
+The display is in the format `address:audio port/data port`

 <h3>5: Signal sample rate</h3>

@@ -48,14 +50,14 @@ Left: combo box to specify the type of samples that are sent over UDP:
  - `LSB Mono`: AF of the LSB part of a SSB demodulated signal as "mono" (I+Q)*0.7 samples that is one sample per demodulator output sample. This can be used with software that accepts mono type of input.
  - `USB Mono`: AF of the USB part of a SSB demodulated signal as "mono" (I+Q)*0.7 samples that is one sample per demodulator output sample. This can be used with software that accepts mono type of input.
  - `AM Mono`: AF of the envelope demodulated signal i.e. channel magnitude or sqrt(I² + Q²) as "mono" samples that is one sample per demodulator output sample. This can be used with software that accepts mono type of input.
-  - `AM !DC Mono`: Same as above but with a DC block based on magnitude average over a 5 ms period     
-  - `AM BPF Mono`: Same as AM Mono but raw magnitude signal is passed through a bandpass filter with lower cutoff at 300 Hz and higher cutoff at RF bandwidth frequency     
-  
+  - `AM !DC Mono`: Same as above but with a DC block based on magnitude average over a 5 ms period
+  - `AM BPF Mono`: Same as AM Mono but raw magnitude signal is passed through a bandpass filter with lower cutoff at 300 Hz and higher cutoff at RF bandwidth frequency
+
 Right: Sample size in bits:

  - `16 bits`: samples are 16 bit signed with little endian layout (S16LE)
  - `24 bits`: samples are 32 bit signed with little endian layout (S32LE) using only the 3 less significant bytes. This means that the range is -2²³ to 2²³ - 1
-  
+
 <h3>7: Signal bandwidth</h3>

 The signal is bandpass filtered to this bandwidth (zero frequency centered) before being sent out as raw I/Q samples or before being demodulated for SSB and FM outputs. Thus a 20000 Hz bandwidth for example means +/-10000 Hz around center channel frequency.
@@ -64,7 +66,7 @@ When SSB formats are used only the lower half (LSB) or upper half (USB) of the b

 <h3>8: FM deviation</h3>

-This is the maximum expected FM deviation in Hz for NFM demodulated samples. Therefore it is active only for `NFM` types of sample formats. A positive deviation of this amount from the central carrier will result in a sample output value of 32767 (0x7FFF) corresponding to a +1.0 real value. A negative deviation of this amount from the central carrier will result in a sample output value of -32768 (0x8000) corresponding to a -1.0 real value.  
+This is the maximum expected FM deviation in Hz for NFM demodulated samples. Therefore it is active only for `NFM` types of sample formats. A positive deviation of this amount from the central carrier will result in a sample output value of 32767 (0x7FFF) corresponding to a +1.0 real value. A negative deviation of this amount from the central carrier will result in a sample output value of -32768 (0x8000) corresponding to a -1.0 real value.

 <h3>9: AGC and audio feedback control</h3>

@@ -72,7 +74,7 @@ This is the maximum expected FM deviation in Hz for NFM demodulated samples. The

 <h4>9.1: Toggle AGC</h4>

-It is effective only for AM and SSB. Signal is normalized to +/- 0.5 times the maximum amplitude with a time constant (averaging) of 200 ms. When engaged the squelch gate is fixed at 50 ms. The release time controlled by (15.3) can be increased from the 50 ms default for SSB signals to prevent accidental signal drops due to drops in the voice.  
+It is effective only for AM and SSB. Signal is normalized to +/- 0.5 times the maximum amplitude with a time constant (averaging) of 200 ms. When engaged the squelch gate is fixed at 50 ms. The release time controlled by (15.3) can be increased from the 50 ms default for SSB signals to prevent accidental signal drops due to drops in the voice.

 <h4>9.2: Toggle audio feedback</h4>

@@ -94,7 +96,7 @@ The changes in the following items only become effective when this button is pre
  - Audio port (9)
  - FM deviation (11)

-When any item of these items is changed the button is lit in green until it is pressed. 
+When any item of these items is changed the button is lit in green until it is pressed.

 <h3>11: Audio volume</h3>

@@ -120,11 +122,11 @@ Use the slider to set the squelch power threshold based on channel input power (

 Sets the delay after which a signal constantly above the squelch threshold effectively opens the squelch. The same delay is used for squelch release except for SSB where the gate is fixed at 50 ms and this controls the release time only.

-The delay in milliseconds is displayed at the right of the button. 
+The delay in milliseconds is displayed at the right of the button.

 <h3>14: Spectrum display</h3>

-This is the spectrum display of the channel signal after bandpass filtering. Please refer to the Spectrum display description for details. 
+This is the spectrum display of the channel signal after bandpass filtering. Please refer to the Spectrum display description for details.

-This spectrum is centered on the center frequency of the channel (center frequency of reception + channel shift) and is that of a complex signal i.e. there are positive and negative frequencies. The width of the spectrum is proportional of the sample rate. That is for a sample rate of S samples per seconds the spectrum spans from -S/2 to +S/2 Hz. 
+This spectrum is centered on the center frequency of the channel (center frequency of reception + channel shift) and is that of a complex signal i.e. there are positive and negative frequencies. The width of the spectrum is proportional of the sample rate. That is for a sample rate of S samples per seconds the spectrum spans from -S/2 to +S/2 Hz.

@@ -50,6 +50,8 @@ The I/Q samples are copied to the baseband to be transmitted by the sink output

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![File source channel plugin GUI](../../../doc/img/FileSource_plugin.png)

 <h3>1: Interpolation factor</h3>
@@ -10,6 +10,8 @@ Note that because it uses only the channelizer half band filter chain to achieve

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Local source channel plugin GUI](../../../doc/img/LocalSource.png)

 <h3>1: Interpolation factor</h3>
@@ -6,6 +6,8 @@ This plugin can be used to transmit IEEE 802.15.4 frames. The 802.15.4 PHY & RF

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![802.15.4 Modulator plugin GUI](../../../doc/img/IEEE_802_15_4_Mod_plugin.png)

 <h3>1: Frequency shift from center frequency of transmission</h3>
@@ -8,6 +8,8 @@ You need an AIS license to transmit on the AIS VHF frequencies (161.975MHz and 1

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![AIS Modulator plugin GUI](../../../doc/img/AISMod_plugin.png)

 <h3>1: Frequency shift from center frequency of transmission</h3>
@@ -6,6 +6,8 @@ This plugin can be used to generate a narrowband amplitude modulated signal. "Na

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![AM Modulator plugin GUI](../../../doc/img/AMMod_plugin.png)

 <h3>1: Frequency shift from center frequency of transmission</h3>
@@ -10,6 +10,8 @@ In practice 4 MS/s with about 300 points per line is the lowest sample rate that

 <h1>Interface</h1>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![ATV Modulator plugin GUI](../../../doc/img/ATVMod_plugin.png)

 <h2>1: Frequency shift from center frequency of transmission</h2>
@@ -19,6 +19,8 @@ Note: this plugin is officially supported since version 6.

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![ChitpChat Modulator plugin GUI](../../../doc/img/ChirpChatMod_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -15,6 +15,8 @@ DVB-S2 includes: scrambling, BCH encoder, LDPC encoder, bit interleaver and QPSK

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![DATV Modulator plugin GUI](../../../doc/img/DATVMod_plugin.png)

 <h3>1: Frequency shift from center frequency of transmission</h3>
@@ -8,6 +8,8 @@ This plugin can be used to generate a signal following the [FreeDV digital voice

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![FreeDV Modulator plugin GUI](../../../doc/img/FreeDVMod_plugin.png)

 <h3>1: Frequency shift from center frequency of transmission</h3>
@@ -6,6 +6,8 @@ This plugin can be used to generate a narrowband frequency modulated signal. "Na

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![NFM Modulator plugin GUI](../../../doc/img/NFMMod_plugin.png)

 <h3>1: Frequency shift from center frequency of transmission</h3>
@@ -6,6 +6,8 @@ This plugin can be used to modulate packet radio (APRS/AX.25) data packets.

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Packet Modulator plugin GUI](../../../doc/img/PacketMod_plugin.png)

 <h3>1: Frequency shift from center frequency of transmission</h3>
@@ -6,6 +6,8 @@ This plugin can be used to generate a single sideband or double sidebands modula

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![SSB Modulator plugin GUI](../../../doc/img/SSBModulator_plugin.png)

 &#9758; In order to toggle USB or LSB mode in SSB mode you have to set the "BW" in channel filter cutoff control (8) to a positive (USB) or negative (LSB) value. The above screenshot shows a USB setup. See the (7) to (9) paragraphs below for details.
@@ -6,6 +6,8 @@ This plugin can be used to generate a wideband frequency modulated signal. "Wide

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![WFM Modulator plugin GUI](../../../doc/img/WFMMod_plugin.png)

 <h3>1: Frequency shift from center frequency of transmission</h3>
@@ -10,6 +10,8 @@ The plugin will be built only if the [CM256cc library](https://github.com/f4exb/

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![Remote source channel plugin GUI](../../../doc/img/RemoteSource.png)

 <h3>1: Data local address</h2>
@@ -10,6 +10,8 @@ This plugin is available for Linux and Mac O/S only.

 <h2>Interface</h2>

+The top and bottom bars of the channel window are described [here](../../../sdrgui/channel/readme.md)
+
 ![UDP Source plugin GUI](../../../doc/img/UDPsource_plugin.png)

 <h3>1: Frequency shift from center frequency of reception</h3>
@@ -30,7 +32,7 @@ Use this button to switch off the RF on the channel. The background of the butto

 <h3>5: UDP address and port</h3>

-Enter the network interface address and listening port. The display is in the format `address:data port` 
+Enter the network interface address and listening port. The display is in the format `address:data port`

 <h3>6: Join multicast group</h3>

@@ -57,7 +59,7 @@ Combo box to specify the type of samples that are received and sent in the chann
 <h3>10: Mono/Stereo input</h3>

 This toggles switches between 1 channel (mono) and 2 channels (stereo) input samples format.
-  
+
 <h3>11: Output signal bandwidth</h3>

 The signal is bandpass filtered to this bandwidth (zero frequency centered) before being sent out in the channel. In SSB modes only half of the filter is used (LSB: lower, USB: upper). Thus to send a signal with 3000 Hz bandwidth a bandwidth of 6000 Hz must be selected. In addition in SSB modes a 300 Hz highpass filter is applied.
@@ -72,9 +74,9 @@ this is the AM percentage modulation when a +/- 1.0 amplitude modulating signal

 <h3>14: Squelch</h3>

-The slider sets the squelch power threshold based on channel input power (2). At the right of the slider the value in dB is displayed. 
+The slider sets the squelch power threshold based on channel input power (2). At the right of the slider the value in dB is displayed.

-The button sets the delay after which a signal constantly above the squelch threshold effectively opens the squelch. The same delay is used for squelch release. The delay in milliseconds is displayed at the right of the button. 
+The button sets the delay after which a signal constantly above the squelch threshold effectively opens the squelch. The same delay is used for squelch release. The delay in milliseconds is displayed at the right of the button.

 <h3>15: Input and output Gains</h3>

@@ -94,7 +96,7 @@ This gauge shows the percentage of deviation from a R/W pointer distance of half

 There is an automatic correction to try to maintain the half buffer distance between read and write pointers. This adjust the sample rate and therefore some wiggling around the nominal sample rate can occur. This should be hardly noticeable for most modulations but can be problematic with very narrowband modulations like WSPR.

-The buffer consists in 512 bytes frames so that a normalized UDP block can be placed in one frame. Half the number of frames is calculated as the sample rate divided by 375. This results in a fixed average delay 0f 341 ms for sample rates of 48 kS/s and above. 
+The buffer consists in 512 bytes frames so that a normalized UDP block can be placed in one frame. Half the number of frames is calculated as the sample rate divided by 375. This results in a fixed average delay 0f 341 ms for sample rates of 48 kS/s and above.

 <h3>18: Reset input buffer R/W pointers</h3>

@@ -117,10 +119,10 @@ The changes in the following items only become effective when this button is pre
  - FM deviation (12)
  - AM percentage (13)

-When any item of these items is changed the button is lit in green until it is pressed. 
+When any item of these items is changed the button is lit in green until it is pressed.

 <h3>21: Spectrum display</h3>

-This is the spectrum display of the channel signal before filtering. Please refer to the Spectrum display description for details. 
+This is the spectrum display of the channel signal before filtering. Please refer to the Spectrum display description for details.

-This spectrum is centered on the center frequency of the channel (center frequency of reception + channel shift) and is that of a complex signal i.e. there are positive and negative frequencies. The width of the spectrum is proportional of the sample rate. That is for a sample rate of S samples per seconds the spectrum spans from -S/2 to +S/2 Hz. 
+This spectrum is centered on the center frequency of the channel (center frequency of reception + channel shift) and is that of a complex signal i.e. there are positive and negative frequencies. The width of the spectrum is proportional of the sample rate. That is for a sample rate of S samples per seconds the spectrum spans from -S/2 to +S/2 Hz.