JETStream JT220M, Service Manual

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JT220M
SPECIFICATIONS
General
Frequency Range
RX 216~280MHz
TX 222~225MHz
Number of channels 100
Operation mode FM 16K0F3E (Wide mode)/8K50F3E (Narrow mode)
Channel Stepping 5, 8.33, 10, 12.5, 15, 20, 25, 30, 50KHz
Antenna Impedance 50
Ω
Working temperature –10
℃
~+60
℃
(–14
℉
~+140
℉
)
Power Supply 13.8V DC
±
15% (11.7~15.8V)
Grounding Method Negative ground
Current
Transmitter: about 9.0A
Receiver: about 600mA(max.) 400mA (noise reductions)
Frequency Stability
±
2.5ppm
Dimensions (W x H x D ) 145 x 47 x 190 mm
Weight Approx. 1.2kg / 2.6lb
RECEIVER
Circuitry Double conversion superheterodyne
Intermediate Frequency (1st / 2nd) 38.85MHz / 450kHz
Sensitivity (12dB SINAD) Wide : 0.25
μ
V or less Narrow : 0.35
μ
V or less
Selectivity
–6dB Wide : 12kHz or more Narrow : 6kHz or more
–60dB Wide : 28kHz or less Narrow : 14kHz or less
Squelch Sensitivity
0.1
μ
V
Audio Output (8
Ω
, 10% distortion) 2.0W
TRANSMITTER
Power Output
High 50W
Mid 10W
Low About 5W
Modulation Changeable impedance
Scattering transmit -60dB or less than-60dB
Maximum Frequency Deviation Wide :
±
5kHz, Narrow :
±
2.5kHz
Impedance of Microphone 2K
Ω