QSSTV  9.2
Receive DRM Window
receivedrm.png

SNR (vu-meter S):

  • SNR in dB

Volume (vu-meter V):

  • adjust your recording level to half scale (better too low than too high).

Received segments:

rxdrm_segments.png
  • green: correctly received segments
  • red: missing segments

Constellation:

rxdrm_constellation.png
  • FAC constellation (always QAM 4)
  • MSC constellation.

Receive status

rxdrm_status.png
  • Mode (A,B or E)
  • Bandwidth (2.2 kHz or 2.5 kHz)
  • Interleave (Short or Long)
  • Protection (Normal or High)
  • QAM (4,16 or 64)
  • SNR (should be above 6 dBm)
  • Offset (0 Hz if no frequency offset)
  • Total Segm.: total number of segments in the file
  • RX Sgmnts.: number of correctly received segment
  • Cur. Sgmnt.: segment currently transmitted
  • Transp. ID; unique identifier for the current stream.
  • Callsign from the transmitting station
statusleds.png
  • TIME: green if time sync else red
  • FRAME: green if frame sync else red
  • FAC: green if FAC correctly received else red
  • MSC:
    • red: incorrectly received
    • green: correctly received
    • yellow: already received

When an data stream is received , the program will try to decode it and save it in the receive image directory. If the data stream is a text file it will be displayed in a separate window. Just click OK to close it.

waterfall.png

Spectrum:
You can select the spectrum or the waterfall by clicking in this window. In DRM the waterfall gives you better view. The three markers above the waterfall indicate the position of the pilot frequencies. This helps tuning the radio to the correct frequency.

(8) see Receive SSTV Window