User Guide

After Sales
Technical Documentation
Performance Specifications
THX–4
Original, 09/94Page 2–8
Transmitter Branch
Frequency band
872.0125 to 904.9875 MHz
Number of channels 1320 International (1240 UK)
PA efficiency >55%
Reference voltage for regulators 4.8 V " 0.2 V
Output power at all channels
 PL2 28 dBm
 PL3 24 dBm
 PL4 20 dBm
 PL5 16 dBm
 PL6 12 dBm
 PL7 8 dBm
(tolerances +2 dB, –4 dB)
Modulation distortion < 5 %
Modulation products:
 outside "17kHz < –26dBc
"37.5kHz < –45dBc
"50kHz < –60 dBc
Residual modulation < –26 dB
TX rise and fall times < 2 ms
Wideband data
 logic 0 corresponds to dev. +6.4 kHz ( " 10 %)
 logic 1 corresponds to dev. –6.4 kHz ( " 10 %)
Maximum deviation " 9.5 kHz
Transmitter AF response 300Hz–3kHz with 6dB/ octave pre–
emphasis
Synthesizer’s RX Branch
Injection frequency range
962.0125 to 994.9875 MHz
Center channel tuning voltage 2.5V " 0.5 V
Synthesizer’s TX Branch
Injection frequency range
872.0125 to 904.9875 MHz
Output level to transmitter
(at V4 output)
0 dBm " 2 dB
Tuning voltage sensitivity 15 – 20 MHz/V
Center channel tuning voltage 2.5V " 0.5 V