ZETRON 640 DAPT XTRA, Installation And Repair Manual

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Installation
025-9416 79
5. If an SSC is not working, check that the CPA line jumper is set for CPA to CPA, not CPA to CPB.
6. The following parameter settings are typical in the Model 640 database. In the Transmitter Key Type database
set:
ModeTime = 50 ms BusyTime = 25 ms
StaRmtCtrl = RTS/CTS DigDataPolarity = “0” for inverted data
In the Transmitter Key Up Control database set:
ModeSgnlPlrty = “high” for digital
Transmitter Controllers
Transmitter controllers are used between the paging input (either directly from the paging term-
inal or on an RF/microwave downlink) and the paging transmitter. The transmitter controller
governs how the transmitter sends out pages. It can determine whether the pages are analog or
digital and demodulate the FSK signals from the paging terminal (in digital mode).
Model 66 Transmitter Controller Interface
At the radio site, a Zetron Model 66 Transmitter Controller provides the remote paging trans-
mitter interface by way of telco line or
µ
wave/RF link. The Model 66 controls analog and digital
paging for transmitters from Quintron, General Electric, Glenayre, Neutec, Spectrum, and other
manufacturers. The Model 66 supports both PURC® and dual-frequency tone remote operation.
See Figure 37 and Figure 38 for basic system applications requiring a transmitter controller.
Figure 43 illustrates the direct cable hookup between the Model 66 and a generic paging trans-
mitter. The link input (RF, microwave, or telco) to the Model 66 should be connected to the
FROM LINK pins (J3 - 4, 5) on the rear panel of the transmitter controller. Refer to the
Model 66
Transmitter Controller Operation and Installation Manual (Part No. 025-9078) for more details.
Model 66
Transmitter Output
(J2)
Paging
Transmitter
Signal Inputs
TO TX HI (2) UNNOTCHED AUDIO
ANA PTT N/O (4) LOCAL PTT
DIG PTT N/O (7)
DIG DATA (10) DIGITAL DATA
DIG MODE (11) DIGITAL RTS
TO TX LO (1)
ANA PTT COM (5)
DIG PTT COM (8)
GROUND (3) GROUND
Figure 43. Wiring Configuration for Model 66 Transmitter Controller
Note: The polarity for the DIG DATA and DIG MODE outputs is selected with jumpers
(JP3 and JP2) in the Model 66.