Signal Distribution Unit SDU C11169/GRC-206

© Brooke Clarke 2008


Signal Distribution Unit SDU C11169/GRC-206

Background

This is one of two small glue boxes used to make up the GRC-206 system.  It is used to make the signal connections in the system.  That would include audio, data and control.
The Remote control is connected via fiber optics so all the radio ON/Off, radio control, voice and data needs to be converted to/from a serial data stream.

There is some information about the signals on the control ports.

Numbers

p/n: 812081-801
NSN: 5895-01-139-4118
contract: FO4606-81-C-0017

Connectors

All the connectors are on the front panel.  There are lines on the panel that outline groups of connectors.
Fiber Optic or hard wire connection between this SDU and the Universal Radio System Control boxes can be used.  When the FO link is used the Battery needs to be switched on.  When the hard wire connection is made the battery can be switched off since power is also supplied by the cable.

Remote

URSC-1 Universal Radio System Control # 1

This is the fiber optic connection between the main system and the control head.
J1: Fiber Optic - Dual Connector
J8: Power - small 5 sockets

USRC-2Universal Radio System Control #2

This is the fiber optic connection between the main system and the control head.
J2: Fiber Optic - Dual Connector
J9: Power - small 5 sockets

Four Radios

There will be two cables between each radio and the SDU.  One carries the audio or data and is the U-229 connector and the other is the control cable for the radio.

VHF-FM

This would be one of the vehicle mounted tatical FM radios like the RT-524, RT-1439 SINCGARS, RT-1523() SINCGARS
J3: U-229 type 6 contact
J11: big circular con many sockets

HF

The HF radio is the GRC-193() system that uses:
 
RT-1209 (part of the PRC-104) with the RT-1444 Remote Control adapter
AM-6879 Audio Amplifier-RTTY Converter
AM-6545A/GRC-193A Amplifier 100 or 400 Watts Harris
CU-2064 Antenna Coupler Harris

J5: U-229 type 6 contact
J10: big circular con many sockets

VHF-AM

This aircraft radio is the VRC-83 which uses the: RT-1319/PRC-113
AM-7176 RF Amp
VRC-83 vehicle mount (MT-?)
J6: U-229 type 6 contact
J12: big circular con many sockets

UHF-AM

This aircraft radio is the VRC-83 which uses the:
RT-1319/PRC-113
AM-7176 RF Amp
VRC-83 vehicle mount (MT-?)

J7: U-229 type 6 contact
J13: big circular con many sockets the O1814 is between the radio and the SDU.

AM-1780

This connector is for the Vehcile Inter Communication (VIC).
J4: U-229 type 6 contact

PDU

I think this is the POWER input to the SDU which comes from the PDU SB-4151/GRC-206 probably from J1 or J2.
J14: 3 male pins circular
The power cable that I made up to power the O-1814 RFO fits this jack and can be used to power the SDU.

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[an error occurred while processing this directive] page created 8 Dec 2008.