QSSTV  8.2
Transmit DRM Window
transmitdrm.png

see sstvMenu under SSTV TX

  • hybrid_checkbox.png
    When this checkbox is checked, the image is transmiited in hybrid mode.

Mode Selection

txdrm_status.png
  • Mode (A,B or E)
  • Bandwidth (2.3 KHz or 2.5 KHz)
  • Interleave (Short or Long)
  • Protection (Normal or High)
  • QAM (4,16 or 64)
  • Instances: number of times the file will be transmitted)
  • Reed Solomon: (rs1, rs2, rs3 or rs4).File encoder for forward error correction. On HF it is recommended to always use Reed Solomon. The most often used is rs2. The higher the number, the more protection but also the more overhead.
  • Profile: quick selection of a profile (i.e. setiings of mode,qam ...) as defined in the Options->Configuration->DRM Profiles)
txdrm_options.png

The TX progresbar indicates the progress of the transmission.

see also Control under SSTV TX

  • Last received image and will be updated automatically as new images are received. They can be inserted if you use a template containing an "image replay object" see also Editor
  • Compression
    txdrm_compression.png
    Avoid to send huge images (especially if you're not in hybrid mode).
    You can drag the slider to compress the image before it is sent (the original image is not modified). The file size is shown on the right. You can see the result in the image frame when you release the handle.
    Note: This does not include the overhead of the RS-encoding.