Instruction manual

Installation

80 025-9416

In an alternate application, the Model 66 can be colocated with the Model 640 and the trans-

mitter for simulcast systems. The connections between the Model 66 and the paging transmitter

are identical to those shown in Figure 43. Figure 44 illustrates the connections between the

paging terminal and the Model 66.

Model 640 RJ21

Radio Station

Output

Model 66 Link (J3)

Signal Inputs

TX AUDIO HI (15) (5) FROM LINK HI

XMIT AUDIO LO (40) (4) FROM LINK LO

GROUND (17) (9) GROUND

Figure 44. Model 66 Colocated with Model 640 for Simulcast Application

Model 68 Transmitter System Controller Interface

When a Zetron Model 68 Transmitter System Controller is interfaced to the Model 640, the

paging output can be directed to up to 16 transmitter zones. The Model 68 steers the output from

the paging terminal to any one of 2-16 local or remote paging transmitters, dependent upon

installed options. For technical details related to operation and/or installation of the Model 68,

refer to the Model 68 Transmitter System Controller Operating and Installation Manual (Part

No. 025-9089). Figure 45 shows the layout of the Model 68 radio station connectors.

50 25

50-pin interface

(J1) to paging

terminal

50-pin interfaces

(J19-J22) to paging

transmitters

Figure 45. Model 68 Rear Panel Connectors

The specific wiring connections between the Model 68 and the Model 640 depend on the telco

and radio station installation method previously chosen. Recall that the 50-pin RJ21 connector on

the Model 640 provides both trunk and radio station signals for the paging terminal. The two

basic installation methods are the terminal block adapter and one or more 66-type punchdown

blocks.

Note: A special software update is required to interface the Model 68 to the Model 640. The

programming ensures that the AUX and DIG PTT both key prior to the HLGT (high