L3 LINKABIT DIVISION® AN/PRD-13(v1/2)





Cypher Research Labs has developed a remote control system for L3 Linkabit Division® DF Radios.

BIT CODES FOR L3 LINKABIT DIVISION AN/PRD-13(V)1

Built In Test (BIT) codes are the first line fault finding tool for this equipment. These codes are displayed as 3 x 4 bit words (i.e xxxx xxxx xxxx).

While from a user perspective the appearance of one of these codes can pass/fail the kit for operational use, for depot level repair, especially if the fault is intermittant or obscure, more details should be provided.

AN/PRD-13(V)1 users returning equipment for repair are requested to provide the following information:

FULL BIT display - not just part.
Serial numbers of the other system components used.
A full description of the fault.
Unusual enviromental or site conditions.
Contact details for the person who could answer further questions regarding the fault.

This additional information will make fault location easier and result in a more timely return to service for the equipment.

If you require further maintenance assistance with your L3 LINKABIT DIVISION® AN/PRD-13(V)1 in the first instance contact or fax or phone support at our normal numbers.


ANTENNA VARIANTS USED WITH THE L3 LINKABIT DIVISION® AN/PRD-13(V)1

Two variants of the MD-445 DF antenna (MD-445B & MD-445C) exist for use with the AN/PRD-13(V)1.

BOTH of these antenna variants are in service with the ADF.

While the performance of the antennas is identical and when deployed they also look the same THEY ARE DESIGNED TO USE DIFFERENT DF CABLES.

The cables also appear to be similar (apart from the beads on the cable) and as they have the same connectors they can be used with the wrong antenna variant. THIS DOES NOT CAUSE A BIT ERROR but it does result in INCORRECT BEARING INFORMATION.

The simple way to identify the types is to look at the base of the antenna. Figure 1 shows a MD-445B and Figure 2 the MD-445C

The MD-445B antenna must be used with a P/N 05-103257-01 cable.
The MD-445C antenna must be used with a P/N 05-105872-01 cable.

Users are urged to check their fleets to find the antenna mix and to ensure that they have the correct DF cables for the antennas they use and to develop a strategy to match these cables with the antennas.

If you require further maintenance assistance with your L3 LINKABIT DIVISION® AN/PRD-13(V)1 in the first instance contact or fax or phone support at our normal numbers.

L3 LINKABIT DIVISION® Website can be found at http://www.l-3com.com