CIRCUIT DESCRIPTION
6-36
August 2000
Part No. 001-2001-200
Pin 16
MSTB
The memory strobe line is used for MAC proces-
sor Read/Write operations to external memory.
Pins 17-20
UNUSED
Pin 21
LPTT
The Logic Push-To-Talk is not used.
Pins 22-23
UNUSED
Pins 24/56
HSDB +/-
The High Speed Data Bus interconnects the
Viking VX repeaters. A 50 ohm termination is
required if Viking VX repeaters are used with existing
repeaters and the interface.
Pins 25/57
IRDB +/-
This data bus interconnects all repeaters to pro-
vide an exchange of programming information with
the programming software and computer. This data
bus allows all repeaters to be accessed without having
to connect the computer to the MPC on each repeater
individually.
Pin 26
TLA DB
The Trunk Line Accounting Data Bus is used for
telephone interconnect calls.
Pins 27/59
-5V IN
This is the -5V input to the MPC from the power
supply via the Controller backplane.
Pins 28-29
+5V IN
Pins 60-61
This is the +5V input to the MPC from the power
supply via the Controller backplane.
Pins 30/62
+15V IN
This is the +15V input to the MPC from the
power supply via the Controller backplane.
Pins 31-32
GROUND
Pins 63-64
This is the ground connection to the MPC from
the power supply via the Controller backplane.
Pin 47
READ
Read is used with the MREQ line to read data
from the processor and external memory.
Pin 48
WRITE
Write is used with the MREQ line to write data to
the processor and external memory.
Pins 49-55 UNUSED
Pin 58
VOTER DATA IN
This is used in a Voter system. Data from the
voter site is injected at this pin.
6.10.13 P100 EXTERNAL OUTPUTS
Connector P100 contains the audio and data out-
puts to the terminal block on the back of the Repeater
cabinet. These outputs are connected to other external
devices. The input and output connectors for the con-
nector are defined as follows.
Pins 1-6
UNUSED
Pin 7
3.5V
This is the 3.5V DC TCXO reference voltage
from the Exciter to the MAC.
Pin 8
TX DATA OUT
This output contains trunking signaling data and
CWID data when enabled at jumper J106 and used
with external optional equipment.
Pin 9
TX DATA IN
This input would normally contain trunking sig-
naling data, CWID data, and an externally summed in
signal. This input is enabled at J106 and is used with
external optional equipment.
Содержание VIKING VX
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Страница 14: ...TABLE OF CONTENTS CONT 10 ...
Страница 24: ...INTRODUCTION AND OPERATION 1 10 August 2000 Part No 001 2001 200 ...
Страница 94: ...CIRCUIT DESCRIPTION 6 44 August 2000 Part No 001 2001 200 ...
Страница 118: ...ALIGNMENT AND TEST PROCEDURES 7 20 August 2000 Part No 001 2001 200 ...
Страница 126: ...SERVICING 8 8 August 2000 Part No 001 2001 200 ...
Страница 160: ...PARTS LIST 9 34 August 2000 Part No 001 2001 200 ...
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Страница 198: ...Part Number 001 2001 200 8 00mwp Printed in U S A ...