Epson Multi-mode Data Controller MFJ-1278B - Manual (Page 58)

MFJ-1278B MULTI-MODE BASIC OPERATION
If you cannot contact anyone using another frequency, call CQ on one of the above
mentioned frequencies. If you do make a contact with someone, then QSY immediately
after establishing contact! Be careful on 20 meters especially that you don't operate +/-
2KHz around 14.100 MHz (you will cause interference to propagation beacons and give
packet a bad name...).
HF Packet Operation Hints
There are a few operating hints which apply to HF Packet. These few hints are listed below:
1. Try to keep all packets below 80 characters in length.
2. Set MAXFRAME to 1. This will minimize transmission time.
3. Avoid multiple connections and digipeated packet operation.
4. Qsy away from the standard calling frequencies as soon as possible.
5. Set FRACK to a sensible long value.
For more details on HF packet operation please refer to the next chapter in this instruction
manual.