TB9400 Specifications Manual Base Station Specifications 25
© Tait Limited July 2017
Analog Audio - General
Frequency response de-emphasized (750μs)
For more information refer to “Appendix A –
Frequency Response Diagrams” on page 47.
De-emphasized response
Bandwidth
Response
300Hz to 3kHz
within +1, –3dB of a –6dB/octave de-emphasis
curve (ref. 1kHz)
Analog Audio - CTCSS
High pass (subaudible) filter
Bandwidth
Response
Hum and noise
a
300Hz to 3kHz
within +1, –3dB of a –6dB/octave de-emphasis
curve (ref. 1kHz)
30dB minimum at 250.3Hz
35dB typical (67Hz to 240Hz)
a. 1kHz at 60% system deviation, CTCSS at 10% system deviation.
Tone detect
Tone squelch opening better than 6dB SINAD
Tone detect bandwidth
Accept
Reject
Response time
(open)
±2Hz typical
±3.6Hz typical
≤150ms typical
Analog Audio - Gating Operation
SINAD gating
Opening level
Accuracy
RF hysteresis
Opening time
Closing time
6dB to 20dB SINAD
±3dB
4dB
60ms typical
60ms typical
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