Specifications

Codes sent by the DTS-4R remote to the DTS-4 switch
R 00 - Remote is telling main unit that buttons 3&4 were pushed – user wants to ground all
antennas.
R 01 - Not used. Remote doesn’t give the command to ground all.
R 02 - Remote tells main unit that button 1 is selected – user wants to select antenna 1.
R 03 - Remote tells main unit that button 2 is selected – user wants to select antenna 2.
R 04 - Remote tells main unit that button 3 is selected – user wants to select antenna 3.
R 05 - Remote tells main unit that button 4 is selected – user wants to select antenna 4.
R 09 - Remote asks main for the current antenna position. Expects a response from main of “M
00,” “M 01,” “M 02,” “M 03,” “M 04,” or “M 05”
R 10 - Remote tells main that the user wants to turn the radio sense mode off.
R 11 - Remote tells main that the user wants to turn the radio sense mode on.
R 12 - Remote asks main for current radio mode. Expects a response from main of “M 10” or
“M 11”
R 14 - Not used. Only main can detect RF.
R 17 - Remote tells main that it does not detect radio power.
R 18 - Remote tells main that it has radio power.
R 19 - Not used. Remote doesn’t need to request the state of the radio
R 20 - Remote asks main to do a self-check. Remote expects a response of “M 21” to show
the remote has started the check. If “M 21” is not received, then remote flashes LEDs 1 and 4. If
“M 21” is received, remote will scroll the LEDs and wait for another response.
R 21 - This is sent to the main unit when the main unit requests a self-check of the remote.
R 22 - After doing a self-check, everything is fine, so remote tells main.
R 23 - After doing a self-check, button 1 is stuck, so remote tells main.
R 24 - After doing a self-check, button 2 is stuck, so remote tells main.
R 25 - After doing a self-check, button 3 is stuck, so remote tells main.
R 26 - After doing a self-check, button 4 is stuck, so remote tells main.
Remote Control Hardware
The DTS-4 and –4R use TTL level serial signals. It may be necessary for the user to install an
RS-232 converter for use with a PC. Many designs for these converters are available on the
internet. Some are based on the popular and inexpensive MAX-232 integrated circuit.
For the interface, the DTS-4 uses a 1/8” stereo jack for the serial connection. The shield is
ground, the ring is signals from the DTS-4 to the remote and the tip is signals from the remote to
the DTS-4.
The DTS-4 and –4R were tested with up to 150 feet of remote cable between them. For the long
cable tests, the cable was 150 feet of Alpha 2400C. That is a 24 AWG (7/32) with shield and
drain. It is practical to say that longer lengths could be achieved with the same wire. The actual
maximum length was not tested.
With these long cable lengths possible, the user can place the DTS-4 in a weather resistant
enclosure for mounting outside.
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