Technical Manual
Installation and Operation
© SPECTRA ENGINEERING 2022 Revision 1.0.0
23
5.3.4 Receive
Measured in accordance with TIA/EIA-603 standards.
Parameter
Specification
Sensitivity:
Better than –117 dBm for 12 dB SINAD.
Typical –121 dBm.
Selectivity 135-520MHz:
More than 82 dB for 25 kHz adj channel.
Typical 85dB
More than 75 dB for 12.5 kHz adj channel.
Spurious Resp:
Better than 80 dB.
Intermodulation:
82-88 dB.
Blocking:
Better than 100 dB at +/- 1 MHz point.
Co-Channel Rejection:
Better than 5 dB.
Distortion:
Less than 3% at 60% deviation.
S/N Ratio:
Better than 50 dB wide band.
Better than 45 dB narrow band.
Receiver Front End BW:
Equal to band allocation.
Audio Bandwidth VF output:
300 Hz to 3000 Hz, +1/-3 dB.
Conducted Spurious:
Less than –57dBm.
Table 5-4 Receive Specifications
5.3.5 Ancillaries
Parameter
Specification
TX Timer:
Programmable, on / off selectable.
Pre-Emphasis Accuracy:
1, -3 dB of 6 dB per octave curve.
De-Emphasis Accuracy:
1, -3 dB of 6 dB per octave curve.
Channel Select:
Software Select
Repeater Tail Timer:
Programmable.
Table 5-5 Ancilary Specifications
