Park Air Systems T6TR, User Documentation

Page: 17 / 136

T6TR VHF 50 W Transceiver Page 7 Specification
Back to Transceiver
Main Page
Receive RF Characteristics
RF Input
50 ohms.
Sensitivity
Between 118 and 136.975 MHz 12 dB SINAD for -107 dBm (1 µV) 30% modulated.
Between 112 and 117.975 MHz: 12 dB SINAD for -105 dBm (1.25 µV) 30% modulated.
Between 137 and 155.975 MHz: 12 dB SINAD for -105 dBm (1.25 µV) 30% modulated
Note:
All references to SINAD in this document include ITU-T recommendation P.53 weighting.
When operating the transceiver in combined T/R antenna configuration, the sensitivity figures
are degraded by 1 dB.
The transceiver has a nominal 6 dB reduced sensitivity feature to improve co-location
performance when maximum sensitivity cannot be realised because of strong unwanted
signals. This is in the form of a 6 dB RF pre-attenuator.
Channel Spacing
AM-Voice 25 kHz, or 8.33 kHz.
AM-MSK 25 kHz.
IF Selectivity
25 kHz channel spacing At ±11 kHz from the centre frequency, the signal is attenuated by less
than 6 dB. At ±25 kHz from the centre frequency, the signal is
attenuated by more than 80 dB.
8.33 kHz channel spacing At ±3.5 kHz from the centre frequency, the signal is attenuated by less
than 6 dB. At ±8.33 kHz from the centre frequency, the signal is
attenuated by more than 70 dB (60 dB using the ETSI test method). At
±25 kHz from the centre frequency, the signal is attenuated by more
than 80 dB.
Unwanted Signal Suppression
Intermod signal suppression The intermodulation signal suppression is 80 dB or greater (reference
12 dB SINAD) for two unwanted signals spaced 100 kHz
(unmodulated) and 200 kHz (30% modulation) from the channel
frequency.
Blocking ratio 95 dB or greater (reference 12 dB SINAD and degraded by 6 dB) in
the presence of an unmodulated unwanted signal spaced at 200 kHz
from the channel frequency.
105 dB or greater (reference 12 dB SINAD and degraded by 6 dB) in
the presence of an unmodulated unwanted signal spaced at 3 MHz
from the channel frequency.
Cross-modulation rejection 95 dB or greater (reference 30 dB SINAD and degraded by 10 dB) in
the presence of a 30% modulated unwanted signal spaced at 200 kHz
from the channel frequency.
105 dB or greater (reference 30 dB SINAD and degraded by 10 dB) in
the presence of a 30% modulated unwanted signal spaced at 3 MHz.