Townshend Computer Tools DAT-Link User Manual page 133

B.5 Remote Control Files 129
It is also possible to create a remote control description manually for use with a
device that has a serial remote control. The remote connector on the rear of the
DAT-Link
can then be directly connected to the device using a custom-built cable.
Since serial remote controls usually do not use a carrier, you will need to set the
carrier on-time to 200 and the o -time to 0 to disable it. Also, the polarity setting
may need to be set to -1 to properly interface with the device. The modulation
patterns for each command need to be constructed from information that can be
found in most such device's service or user manuals.