Reference Clock Interface - Safran CORTEX CRT Quantum User Manual

Reference Clock Interface

3.8.4.
Without EFC, both the external reference 1 and 2 are connected to the main signal processing board of the CRT.
With the EFC,

The external reference 1 is no longer connected to the main signal processing board of the CRT but is
connected to the EFC board.

The external reference 2 is still connected to the main signal processing board of the CRT

The EFC board supply a reference 10MHz to the main signal processing board of the CRT
Here below are the different possibilities according to the CRT reference frequency setup (Internal, External input
1, External input 2 or External input 1 or 2):

Case 1: « Reference frequency » = « Internal »

Case 2: « Reference frequency » = « External Input 1 »

Case 3: « Reference frequency » = « External Input 2 »
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COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
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It cannot be duplicated or distributed without expressed written consent.
Both EFC and MSP boards use the internal
reference of the EFC board.
One external reference is connected to "EXT 1"
Both EFC and MSP boards use the external
No external reference is connected to "EXT 1"
Both EFC and MSP boards use the internal
reference of the EFC board.
Safran Data Systems
.
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
reference 1
Page 215