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VX-4000 VHF Low-band Service Manual
Specifications
GENERAL
Number of Channels: 250 channels
Frequency Range: 29.7 - 37.0 MHz (A), 37.0 - 50 MHz (B)
Channel Spacing: 5 / 10 / 12.5 / 15 / 20 / 25 / 50 kHz
Power Supply Voltage: 13.8 VDC
Current Consumption: Standby: 400 mA
Receive: 2.5 A
Transmit: 12 A
Ambient Temperature Range: –30°C to +60°C (–22°F to +140°F)
Frequency Stability: ±5.0 ppm
RF Input-Output Impedance: 50 Ohms
Audio Output Impedance: 4 Ohms
Dimensions: 7" (w) x 2.4" (H)x 7.7" (D) (178 x 60 x 195 mm)
Weight: 4.9 lbs. (2.2 kg)
RECEIVER (Measurements made per EIA standard TIA/EIA-603)
Circuit Type: Double-conversion Super-heterodyne
Sensitivity(EIA 12 dB SINAD): 0.25 µV
Adjacent Channel Selectivity: 85 dB
Intermodulation: 75 dB
Spurious and Image Rejection: 85 dB
Audio Response: +3 / –8 dB from the 6 dB / oct. re-emphasis curve
Audio Output: 5 W @ 4 Ohms, 10 % THD
10 W @ 4 Ohms w/<10 % THD (Option)
TRANSMITTER (Measurements made per EIA standard TIA/EIA-603)
Power Output: 70 / 30 W
Modulation: 16K0F3E, 11K0F3E
Max Deviation: 5.0 kHz
Conducted Spurious Emissions: 70 dB Below Carrier
FM Hum & Noise: 45 dB (25 kHz)
Audio Response: +1 / –3 dB from the 6 dB / oct-8
Audio Distortion (@ 1 kHz): < 5 %
Measurements per EIA standards unless noted above.
Specifications subject to change without notice or obligation.
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