Instruction manual
Installation
78 025-9416
Motorola PSC/SSC Transmitter Link Controller Interface
Figure 42 illustrates a typical cable hookup between the Model 640 radio station interface and a
Motorola PURC® Station Controller (PSC) or Simulcast System Controller (SSC). Note that a
Motorola PSC or SSC requires an external 202 type modem to encode the digital paging data.
Zetron’s multiple-site remote control feature for the Model 640 radio station provides an alter-
nate to most Motorola PSC and SSC applications.
Model 640 RJ21
Radio Station
Output
Motorola PSC or SSC
Signal Inputs
ZONE ADR 1
1
(47) ZONE (SSC only)
ZONE ADR 4
1
(46) ZONE (SSC only)
DIG PTT NO (45) KD (key digital)
ANA PTT NO (43) KA (key analog)
BUSY
2
(41) CPB (Clear to Page Binary)
XMIT AUDIO LO (40) Tone
ZONE ADR 2
1
(22) ZONE (SSC only)
ZONE ADR 8
1
(21) ZONE (SSC only)
UDS 202 Modem
DIG DATA (42) TX TIP
RTS RING
+12v
GND
MODEM (Tip lead)
MODEM (Ring lead)
DIG PTT COM (20)
ANA PTT COM (18)
GROUND (17) GROUND
COR
2
/ CAS (16) CPA (Clear to Page Analog)
XMIT AUDIO HI (15) Tone
Figure 42. Wiring Configuration for Motorola PSC/SSC Link Controller
Notes on Figure 42:
1. Zone address outputs from the Model 640 are active low.
2. Default polarity for the COR and BUSY inputs are active low (0 volts = logic “1”). The busy LED should not be lit
when idle. If reversed polarity is desired, move jumpers JP4 and JP6 on the peripheral board to position A -
active high.
3. Line out signals from the Motorola PSC/SSC drive the link.
4. Make sure the modem is a 202, not a 212.