Avoids collisions - blocks two TRXs on same Antenna output.
Blocks during PTT - hot switch - can not change antenna output, if PTT is activated.
Disconnect PTT line - if collision detected.
IP remote via simple web interface (if optional ethernet module instaled).
Outputs control LOW or HIGH - selected by internal jumper and IC - see manual.
ULN2803A open collector driver - switching antenna relay with grounded outputs.
UDN2580A supply 12V power driver - switching antenna relay with 12V power outputs.
Measured input DC power voltage - because the same power is used for antenna relay switching, low voltage warning is shown on the LCD screen.
Output connector included power for switch - all in one cable.
More inpunts in same time = select only one antenna for each TRX.
Colision between TRX and the same antenna (antenna in use).
Switching during PTT ON (HOT switch protection), separately for each TRX.
Two line LCD, one for each TRX.
12-15V DC power (13,8V recomended) .
For controlled by logging programs as N1MM+ or Wintest, Markus DK5AX wrote a amll programm that translates between the „Open Two Radio Switching Protocol (OTRSP)“ supported in the logging SW and the IP Antenna Switch Control. Operators interested in this functionality may contact Markus by email (dk5ax at darc.de).