42
SPECIFICATIONS
General
Frequency Range (Factory)
Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 – 148 MHz
Receive. . . . . . . . . . . . . . . . . . . . . . . . 136.000 – 174.000 MHz
Frequency Step . . . . . . . . . . . . . . 5/10/12.5/20/25/50/100 kHz
Frequency Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
10 ppm
Antenna Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Ohms
Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ohms
Microphone . . . . . . . . . . . . . . . . . Electret Condenser (1.2 kOhms)
Operating Temperature . . . . . . . . . . . . . 14 to 140°F (–10 to 60°C)
Dimensions (HWD) . . . . . . . . . . . . . . . . 1
5
/
8
×
5
9
/
16
×
6
3
/
16
Inches
(42
×
142
×
160 mm)
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 13.8 V DC (
±
15%)
Receiver
Intermediate Frequency
1st IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.4 MHz
2nd IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455 kHz
Sensitivity
12 dB sinad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25
µ
V
20 dB nq. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.39
µ
V
Squelch Sensitivity
Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1
µ
V
Tight . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB above threshhold
Spurious Response Attenuation . . . . . . . . . . . . Better than 70 dB
Adjacent Channel Rejection . . . . . . . . . . . . . . . Better than 70 dB
Modulation Acceptance Bandwidth. . . . . . . . . Better than 7.5 kHz
Hum and Noise . . . . . . . . . . . . . . . . . . . . . . . . Better than 40 dB
Audio Output Power at 10% THD . . . . . . . . . . . .Better than 2.0 W
Audio Distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2%
Audio Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . –6 dB/Octave
Stand-by Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mA
CTCSS Sensitivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15
µ
V
DTMF Squelch Sensitivity. . . . . . . . . . . . . . . . . . . . . . . . . . 0.2
µ
V
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Summary of Contents for HTX-242
Page 44: ...44 SCHEMATICS All manuals and user guides at all guides com...
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