Safran CORTEX CRT Quantum User Manual page 46

1.6.1.2. PM and FM Demodulation

Input carrier frequency

Spectrum analysis

IF level measurement accuracy < 2 dB
1.6.1.2.1. PM Demodulation

Carrier acquisition modes

Carrier acquisition

Acquisition & tracking range

PLL type and 2 Bn Loop bandwidth (CRT XL Quantum)

PLL type and 2 Bn Loop bandwidth (CRT eXplorer)

Acquisition threshold (CRT XL Quantum)

Acquisition threshold (CRT eXplorer)

Tracking threshold

Maximum Doppler rate

Output video bandwidth

Doppler measurement

Diversity combining
1.6.1.2.2. FM Demodulation

Pre-detection filter bandwidth

PCM/FM BER degradation

AFC time constant

Discriminator number of periods 1 to 16

Output video bandwidth
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
60 to 78 MHz
Yes (spectrum analysis and IF demodulation are mutually exclusive)
Automatic (global FFT analysis) or Manual (sweeping)
Select highest component, for low modulation index (<
Spectrum correlation, for high modulation index (anti-sideband)
± 10 to ± 500 kHz
2nd order
10 Hz, 30 Hz, 100 Hz, 300 Hz, 1000 Hz or 3000 Hz
2nd and 3rd order
0.1Hz, 0.3 Hz, 1 Hz, 3 Hz, 10 Hz, 30 Hz, 100 Hz, 300 Hz, 1000 Hz,
3000 Hz
User-selectable 0.1 Hz to 3000 Hz
C/No = 20 dB.Hz (for 2Bn = 10 Hz). Measured on a pure carrier
C/No = 8 dB.Hz (for 2Bn = 1 Hz). Measured on a pure carrier
≤ acquisition threshold
≤ 50 kHz/s and C/N0 > 50 dB.Hz (for 2 Bn = 1,000 Hz)
≤ 100 kHz/s and C/N0 > 60 dB.Hz (for 2 Bn = 3,000 Hz)
DC to 2 MHz
IF offsets and cumulated phase variations (Integrated Doppler)
Optional. Post-combination. Up to 3-dB gain with equal-strength signals
10, 5, 3, 1.5, 1 MHz, 500, 300, 150, 100, 50, 30, 15, 10 and 5 kHz
(single-side at 1 dB)
2 dB typical at Eb/No = 7 dB, with the matched pre-detection filter
1, 10, 100 or 1000 ms
Depends on the Pre-Detection filter and Discriminator programming
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It cannot be duplicated or distributed without expressed written consent.
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec. 03, 2021Sept.
30, 2021
1.3 rad.)
Page 21