Specifications

117
Remote Control Options (950-9074 and 950-9111)
TX Link Controllers
Typical cable hookup between the Zetron station card (702-9441) and most brands of
transmitter link controllers such as Quintron Omega, Microlink 20T, and Motorola DDC is
shown below. For Motorola PSC or SSC TX link controller, see hookup in a previous
diagram.
Figure 25: TX LINK Controllers
NOTES:
• Zone outputs from Zetron are active low (0 VDC = logic “1”)
• Normal polarity for COR/CAS and BUSY are 0 VDC = logic “1”. LED should be
on when idle. If opposite polarities are desired, move jumpers JP5 and JP6 on the
station card (702-9441) to position A.
• The following timing settings are typical in the file oparam.cds (full details on
software settings can be found in System Configuration Files on page 217).
pp Meaning cc qq ...
01 Busy time 03 00 19 = 25 milliseconds that
COR/CAS must be clear
04 Mode switching time 03 00 32 = 50 milliseconds to wait
between changes in PTT relays
07 Remote control mode 02 04 = External TX-controller
RTS/CTS handshaking
ANA PTT NO
DIG PTT NO
COR/CAS
BUSY
DIG DATA
TX AUDIO HI/LO
ZONE ADR 8/4/2/1
ANA PTT COM
DIG PTT COM
GROUND
ANALOG REQUEST
DIGITAL REQUEST
CTS ANALOG
CTS DIGITAL
DIGITAL DATA
TONE AUDIO
ZONE ADDRESS
SIGNAL GROUND
STATION CARD
Most Brands
TX LINK CONTROLLER