Tone Level Ratio; Pll Bandwidth - Safran CORTEX CRT Quantum User Manual

3.6.4.5. Tone Level Ratio

For the ESA, ESA-like and USB standards, the minor tones being superposed to the major tone, it is necessary
to program the level ratio between the two tones:
Let's call ������ the absolute Major tone modulation index for ambiguity resolution, ������
����������
Minor tone modulation index and ������
The IFM ranging modulation index (let's call it Idx), offset 6 in IFM table, has to be configured with:
The Major/Total amplitude ratio for ambiguity resolution has to be configured with the value of ������
������.
In this case ������
����������
The Major/Total amplitude ratio for measurements has to be configured with the value of ������
range [0.01 - 1.0]. Value 0 is used for compatibility with previous software (equivalent to value 1)
This parameter is not significant for the INMARSAT, LMCO and ESA code standards.

3.6.4.6. PLL Bandwidth

The PLL loop bandwidth is programmable from 0.1 Hz to 8 Hz (Cortex CRT Quantum), and from 0.001 Hz to 8
Hz (CRT eXplorer). See Section 3.6.12 for detailed performances in the presence of noise and Doppler. For the
INMARSAT and LMCO standards, the loop bandwidth must be set between 1 Hz and 8 Hz. Lower values are not
compatible with the tone set times. For other standards, see also next section.
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
the absolute Major tone modulation index for measurements phase.
��������
������ = ������
= ������ × ���������� and ������
����������
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
+ ������
���������� ����������
= ������ × (1 – ����������).
Safran Data Systems
.
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
the absolute
����������
/
����������
/ ������ in the
��������
Page 166