# Manual
This manual applies to the "fft-multi-decoder_fixed_hackrf.grc" flowgraph

## graphs
![screenshot graphs tab](Bildschirmfoto89_graphs.png)
### freq and volume sliders
freq_tune = frequency of SDR hardware
volumeLR = volume for left and right channel
volumeC = volume for center channel
freq1..9 = frequency of all channels
### scopes
spectrum of input signal

spectrum of filtered input signal for single channel (first 6 channels)
spectrum of signal after FM demodulation (first 6 channels)
constellation after PSK decoder (first 6 channels)
### gain and loop_bw sliders
intermediate frequency-, baseband- and radio frequency gain of SDR hardware

loop_bw = loop bandwidth of all PSK decoders


## RDS Table
![screenshot table tab](Bildschirmfoto90_table.png)
### table
  hint: hover over text to get more details e.g. time -> date, RT -> RT+
  click LCR buttons to hear this channel on left/right/center audio
  
### buttons
code.interact
  - launches interactive python console (inside "rds_parser_table_qt_Widget" instance) in the terminal window GRC was launched from
  parser object accessible via "self.tableobj" variable
  - can only be used, if GRC was launched from the terminal
  - pauses execution of parser
  - exit shell and resume execution with CTRL-D or "exit()" 

show IH data
  - display InHouse (groupType 6A) data of all stations

save
  - save current state of parser to data directory

print profile
  - print profiler info (currently disabled)

searchMode
  - switch station_search block on/off

### decoder info
  - red/green : RDS decoder sync status
  - overline/underline: symbol combiner status

## TMC list
### event/location filters
enter = apply filter
### event list
scroll to bottom to follow new events

## TMC map
open google_maps.html from /data in webbrowser

- click on background = reload/update markers (closes all info windows)
- click on marker = open info window
   - hover over text in info window to get more details (time-> date, event string -> raw MGM data)
- t-key = toggle (google) traffic layer on/off
- red lines from tmc event markers show extent of event