Technical Manual Appendices
© SPECTRA ENGINEERING 2006 Revision 4.2.3
107
7.2.4 Receive
Measured in accordance with TIA/EIA-603 standards.
Parameter
Specification
Sensitivity: Better than -117dBm for 12dB (25 kHz spacing),
De-emphasis. Typical -120dBm
Selectivity 30-50MHz: More than 90 dB for 25 kHz adj channel,
more than 80 dB for 12.5 kHz adj channel,.
Selectivity 66-520MHz: More than 80 dB for 25 kHz adj channel,
more than 75 dB for 12.5 kHz adj channel,.
Selectivity 805-960MHz: More than 70 dB for 25 kHz adj channel
more than 65 dB for 12.5 kHz adj channel.
Spurious Resp: Better than 90dB.
Intermodulation: Better than 80dB.@ 100kHz/200kHz offset
Blocking: Better than 100dB at +/- 1MHz point.
Distortion: Less than 2% at 60% deviation.
S/N Ratio: Better than 50dB wide band.
Better than 44dB narrow band.
Receiver Front End BW: Equal to band allocation, no retuning.
Discriminator Audio Bandwidth: DC to 3400Hz (-3dB)
Audio Bandwidth VF output:
300Hz to 3000Hz, +1/-3dB
Squelch Opening Time: Less than 20mS @ 20dB SINAD.
Squelch Closing Time: Less than 100mS.
Conducted Spurious: Less than -57dBm, typ -90dBm.
Table 7-9 Receive Specifications
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