Specifications And Options; Specifications; D General; D Transmitter - Icom IC-GM651 Instruction Manual

n Specifications
* This specification is described when the IC-GM651 is used with
the PS-250.

D General

• Frequency coverage : TX 156.000–161.450 MHz
• Mode : FM (16K0G3E), DSC (16K0G2B)
• Current drain (at 24 V) : TX high (25 W) 3.5 A
• Power supply requirement : Use with PS-250*
*Input voltage to PS-250 is 12/24 V DC (10.8 V to 31.2 V)
• Frequency stability : ±5 ppm
• Operating temp. range : –15°C to +55°C
• Antenna impedance : 50 ˘ nominal
• Input impedance (Hand mic) : 2 k˘
• Output impedance (audio) : 4 ˘
• VDR interface
Impedance : Ballanced 600 ˘
Ground : Floating
Audio level : TX –4 dBm (typical)
• Dimensions (Projections not included)
: 220(W) × 110(H) × 109.4(D) mm
IC-GM651
: 250(W) × 67(H) × 200(D) mm
PS-250
• Weight
IC-GM651 : Approx. 1600 g
PS-250 : Approx. 2100 g

SPECIFICATIONS AND OPTIONS

RX 156.000–163.425 MHz
Max. audio 1 A
(at 1 kHz, ±3 kHz deviation)
RX –3 dBm (typical)
(at 1 kHz, ±3 kHz deviation)

D Transmitter

• RF output power : 25 W and 1 W
• Modulation system : Variable reactance frequency
• Max. frequency deviation : ±5.0 kHz
• Spurious emissions : Less than 0.25 µW
• Adjacent channel power : More than 70 dB
• Audio harmonic distortion : Less than 10%
• Residual modulation : More than 40 dB
• Audio frequency response : +1 to –3 dB of 6 dB/octave

D Receiver

• Receive system : Double conversion superheterodyne
• Sensitivity (20 dB SINAD) : –5 dBµ emf (typical)
• Squelch sensitivity : Less than –2 dBµ emf
• Spurious response : More than 73 dB
• Intermodulation : More than 75 dB
• Adjacent channel selectivity : More than 75 dB
• Hum and noise : More than 45 dB
• Audio output power : 2.0 W at 10% distortion with a 4 ˘
All stated specifications are subject to change without
notice or obligation.
10
modulation
(at 1 kHz, 60% deviation)
range from 300 Hz to 3000 Hz
–5 dBµ emf (typical)
(CH 70 receiver)
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