Hybrid Ranging Calibration; Sqpn Epoch Position And Ranging Tones Coherency And Synchronisation - Safran CORTEX CRT Quantum User Manual

3.6.13.6.Hybrid Ranging Calibration

Calibration can be done owing a calibration request.
The calibration process is as follows:

The SQPN signal that is normally output on the dedicated IFM is replaced with ranging tones from an
internal generator. The ranging tones modulate the carrier in PM.

The PM signal is generated coherently and synchronously with regards to the SQPN Q code (long
code).

3.6.13.6.1.SQPN Epoch Position and Ranging Tones Coherency and Synchronisation

First of all, let's define the Epoch position in the SQPN Q code signal.
The Epoch is defined as the first chip of the SPQN Q code sequence.
For instance
Init value of register is all '1' => The sequence starts with 18 '1' followed by '0' etc ...
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Range Channel Code Generator (example)
�� �� = 1 + ��
1
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
3 8 18
+ �� + �� + ��
Safran Data Systems
.
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
Range Channel
Code
18
Page 196