User Guide

TECHNICAL ABSTRACT
11/97JR
2–17
NHC–4
Technical Documentation
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Carrier on/off switching time: < 2ms
Frequency stability: ± 2.5 ppm (no AFC in analog mode)
Harmonic and spurious emissions: 43 +10*log (Po W) dB below carrier
Reception Specifications
Sensitivity, 12 dB SINAD (C):
–116 dBm
Hum and noise: 32 dB
RSSI dynamic range: 60 dB
Adjacent channel selectivity: 16 dB
Alternate channel selectivity: 60 dB
IMD attenuation, close spaced: 65 dB
IMD attenuation, wide spaced: 70 dB
Cascaded NF: < 8 dB
Cascaded IIP3: > –10 dBm
Digital Mode
Transmission Specifications
Modulation method:
Pi/4 DQPSK
Transmitter error vector, first 10
symbols, not tuned: < 20 %
Transmitter error vector, over
whole burs, not tuned: < 11 %
Output RF power (ERP from ext. ant.): 26.8 ...–4.5 dBm
Number of power levels (2–10): 9
Power level tolerance, level 8: ± 3 dB
Power level tolerance, level 9: ± 6 dB
Power level tolerance, level 10: ± 9 dB
Carrier on/off switching time: < 123 µ
Frequency stability: ±
200 Hz from the base
station carrier