TB9400 Specifications Manual Base Station Specifications 29
© Tait Limited July 2017
Supported simulcast modulation schemes
P25
Analog
C4FM
LSM
H-DQPSK
FM
Receive voter limitations
c
Maximum number of receivers
Maximum marshaling duration:
P25
Analog
Maximum central voter speech packet
arrival time skew
20
300ms (simulcast operation)
150ms (simulcast operation)
100ms
c. For a discussion of the significance of these limitations, see the System Manual.
Simulcast (Continued)
Analog Audio - General
Peak deviation ≤2.5kHz
Limiting deviation
a
≥90% of peak deviation for the configured
bandwidth
a. With modulation input driven at a frequency of 1kHz, and at a level 20dB above the nominal level of 60% deviation.
Nominal deviation (average)
b
55% to 65% of peak deviation
b. For a level of –10dBm0 applied to the G.711/IP input.
CWID deviation 40% of peak deviation
Analog Audio - Modulation Characteristics
Frequency response (below limiting) flat or pre-emphasized
For more information refer to “Appendix A –
Frequency Response Diagrams” on page 47.
G.711 inputs
Pre-emphasised response
Bandwidth
Below limiting
Flat response
Bandwidth
Response
300Hz to 3kHz
within +1, –3dB of a 6dB/octave pre-emphasis curve
(ref. 1kHz)
300Hz to 3kHz
within +0.5, –1.5dB of output level at 1kHz
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