Safran CORTEX CRT Quantum - IF Reception; Non-Coherent; Coherent AGC

COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
© Safran Data Systems
This document is the property of Safran Data Systems.
It cannot be duplicated or distributed without expressed written consent.
Page 238
4.2.7.2. IF Reception
4.2.7.2.1. Non-coherent / Coherent AGC
To program the AGC test points voltage in non-coherent or coherent mode:
Registry path: HKEY_LOCAL_MACHINE\SOFTWARE\In-snec\CortexCRT\SetDefault\Preferences\Global
Keyword: CAGcoherente
Default setting at delivery: 0 (non-coherent AGC)
The 12 least significant bits (bit 0 = LSB) of the registry key are used to program the AGC test points:
 Bits 0-3: Non-coherent vs Coherent
- 0: AGC voltage corresponding to the signal energy in a 10 MHz bandwidth (non-coherent mode)
- 1: AGC voltage corresponding to the IF carrier level (coherent mode)
 Bits 4-7: AGC test point # 1. Not significant if bit 0 = 0
- 0: IF carrier level measured by IF Receiver # 1
- 1: IF carrier level measured by IF Receiver # 2
- 2: IF carrier level measured by IF Receiver # 3
- 3: IF carrier level measured by IF Receiver # 4
- 4: IF carrier level measured by IF Receiver # 5
- 6: Unused
- E: IF carrier level measured by DCU # 2
- F: IF carrier level measured by DCU # 1
 Bit 8-11: AGC test point # 2: as per bits 4 to 7
 Bit 12-15: AGC test point # 3: as per bits 4 to 7
Examples: enter 0 for the AGC test points in non-coherent mode. Enter 65D or 101H for the AGC test points in
coherent mode (IFR # 1 on AGC # 1 and IFR # 2 on AGC # 2).
The origin of the AGC information is as follows:
 IFR: signal level received by the corresponding IFR
 DCU, post-detection: signal received on the best channel if DCU in Video mode, not significant if DCU
in PCM mode
 DCU, pre-detection: not significant