Viking VX 900 MHz LTR, Руководство пользователя

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CIRCUIT DESCRIPTION
6-42
October 1999
Part No. 001-2009-201
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 exist-
ing repeaters and the interface.
Pins 25/57 UNUSED
Pin 26 TLA DB
The Trunk Line Accounting Data Bus is used for
telephone interconnect calls.
Pin 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
voted site is injected at this pin.
6.12.12 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.
Pin 10 EXT REQ1
This input provides for external requests from
optional equipment.
Pin 11 EXT MOD
This input provides for external wide band modu-
lation of the Exciter with out any filtering. This input
is not used at this time.
Pins 13-26 UNUSED
Pin 27 RX WB AUDIO
The Receive Wide Band Audio from the
Receiver audio demodulator through the RF Interface
Board. The typical amplitude is 387 mV RMS (-6
dBm) and 2V DC with Standard TIA Test Modulation
into the receiver.