PAGE 22
INSTRUCTION MANUAL
TX4400
GENERAL
Compliance:
Compliant with AS/NZS 4365
for radio communications
equipment in the UHF citizen
band and personal radio service .
Frequency Range:
476 .425 MHz - 477 .400 MHz
Number of Channels:
40 (plus 20 receive only)
Frequency Range
(receive only):
465 MHz - 485 MHz
Channel Spacing:
25 kHz
Operating Mode:
Simplex or half duplex with
repeater talk-around .
Scanning Speed:
100 ms per channel (10
channels per second)
Antenna Impedance:
50 Ohms nominal
Nominal Battery
Voltage:
12 V DC
Operating Voltage
Range:
10 to 16 V DC
Standard Test Voltage:
13 .8 V DC
Battery Polarity:
Negative Earth
Overvoltage
Protection:
30 V DC maximum - At 18 V DC
the RF power is reduced and
the channel display flashes
‘Hi DC’ on receive .
Reverse Voltage
Protection:
Diode Crowbar
Overcurrent protection:
In-line 2 Amp fuse
Operating Temperature:
-10° C to 60° C
TRANSMITTER
RF Output:
5 Watts
Spurious Emission:
< - 70 dBc
Frequency Error:
< ± 5 PPM
Modulation:
FM
Maximum Deviation:
< ± 5 kHz at + 20 dB AF
Limiting
Transmit Frequency
Response:
+ 6 dB per octave 300 Hz to 3
kHz, + 1, - 3 dB
Demodulated Audio
Signal to Noise:
> 45 dB unweighted .
Current Consumption:
1 .4 Amps with 50 Ohm
termination .
RECEIVER
RF Bandwidth:
< 5 MHz
Intermediate
Frequencies:
21 .4 MHz and 455 kHz
Sensitivity:
- 123 dBm for 12 dB SINAD
unweighted .
Sensitivity of
Receive-only Channels:
-107 dBm for 12 dB SINAD
Selectivity:
- 6 dB ± 7 .5 kHz
- 70 dB ± 25 kHz
Intermodulation
Immunity:
76 dB
Blocking Immunity:
>100 dB
Spurious Response
Immunity:
70 dB
Audio Output Power:
3 Watts average into 4 Ohms .
Audio Signal to Noise:
> 45 dB unweighted
Receiver Frequency
Response:
- 6 dB per octave de-emphasis,
300 Hz to 3 kHz, + 1, - 3 dB .
Current Consumption:
210 mA muted .
600 mA Full Volume .
Conducted Spurious
Emission:
< - 75 dBm
Squelch:
Adjustable -125 dBm to
-109 dBm . Max . Hysteresis
6 dB typical .
MECHANICAL SPECIFICATION &
CONNECTIONS
Dimensions:
172 mm (W) x 95 mm (D) x
52 mm (H)
Weight:
626 grams
12 Volt Power Supply:
Two core red and black cable
with bulkhead connector in rear
panel .
Antenna:
SO239 panel socket
External Speaker:
3 .5 mm Mono Jack
Microphone Port:
6 Way telephone style with
rubber strain relief .
SPECIFICATIONS
