COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
This document is the property of Safran Data Systems.
It cannot be duplicated or distributed without expressed written consent.
4.2.7.2.3. DQPSK, DOQPSK, DSOQPSK and GMSK Code
Polynomial code for DQPSK:
Registry path: HKEY_LOCAL_MACHINE\SOFTWARE\In-snec\CortexCRT\SetDefault\Preferences\Ifrx
(x=1 to 5)
Keyword: DQPSKcode
Default setting at delivery: 0xC5A3AC35
The 2 MSB byte are used to I polynomial value and 2 LSB byte are used to Q polynomial value.
Polynomial code for DOQPSK, DSOQPSK, Differential GMSK:
Registry path: HKEY_LOCAL_MACHINE\SOFTWARE\In-snec\CortexCRT\SetDefault\Preferences\Ifrx
(x=1 to 5)
Keyword: DOQPSKcode
Default setting at delivery: 0x3C3C9999
The two MS Bytes are used for I polynomial value and the two LS bytes for Q polynomial value.
4.2.7.2.4. IF Receiver Locking Threshold
To change the IFR locking threshold:
Registry path: HKEY_LOCAL_MACHINE\SOFTWARE\In-snec\CortexCRT\SetDefault\Preferences\Ifrx
(x=1 to 5)
Keyword: IFThreshPM
Default setting at delivery (Cortex CRT XL Quantum): 970 (decimal)
Default setting at delivery (CRT eXplorer): 1300 (decimal)
Enter the locking threshold in 0.1 dBm step. Example: 970 = -97 dBm).
4.2.7.2.5. I/Q Swap Inverted (NT Compatibility)
Inverts the IF spectrum and allows the I and Q output to be identical to the Cortex NT (inverted compared to the
Cortex XL).
Registry path: HKEY_LOCAL_MACHINE\SOFTWARE\In-snec\CortexCRT\SetDefault\Preferences\Ifrx
(x=1 to 5)
Keyword: SwapInvert
Default setting at delivery: 0
Enter 0 for non-inverted spectrum and I/Q swap (XL mode), 1 for inverted spectrum and I/Q swap (NT
compatibility).
4.2.7.2.6. PLL Order
Allows the IFR to use 2nd or 3rd Order PLL (CRT eXplorer only)
Registry path: HKEY_LOCAL_MACHINE\SOFTWARE\In-snec\CortexCRT\SetDefault\Preferences\Ifrx
(x=1 to 5)
Keyword: PllOrder
Default setting at delivery: 0
Enter 0 for 2nd Order or 1 for 3rd Order PLL
To Next Page
Loading...