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SPECIFICATIONS
● Transmitter Unit
Antenna output power 25W +20%, –50% 0.1 – 1W (reduced output)
Oscillation method Frequency synthesizer
Modulation method Frequency modulation
Maximum frequency deviation Within ±5kHz
Occupied bandwidth Within ±16kHz
Microphone input impedance 600Ω balanced
Standard modulation input –53dBm
Pre emphasis characteristics 6dB/oct +1dB, –3dB
Overall distortion 10% or better
Signal-to-noise ratio 40dB or more
Spurious emission 2.5µW or less
DSC modulation rate 1200 baud ±30X10
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DSC modulation method FSK
DSC modulation index 2 ±10%
Mark signal frequency (Y) 1300Hz ±10Hz
Space signal frequency (B) 2100Hz ± 10Hz
● Receiver Unit
Receiving system Double superheterodyne
1st IF 21.4MHz
2nd IF 455kHz
Local oscillation frequency Reception frequency – 21.4MHz
Local oscillation method Frequency synthesizer
Sensitivity 2µV or better (20dB NQ)
Sensitivity (DSC) Symbol error rate at 1µV is 1% or better.
Squelch sensitivity 1µV or better
Selectivity 6dB bandwidth: 12kHz or more
70dB selectivity: 25kHz or less
Spurious response 80dB or more (20dB NQ)
Spurious response (DSC) Symbol error rate is 1% or less at a wanted signal level of 3dBµ and
an unwanted signal level of 73dBµ.
Blocking 90dBµ or more (±1–10MHz), 80dBµ or more (20dB NQ)
Blocking (DSC) Symbol error rate is 1% or better at a wanted signal level of 3dBµ
and an unwanted signal level of 73dBµ.
Intermodulation 70dBµ or more (20dB NQ)
Intermodulation (DSC) Symbol error rate is 1% or better at wanted signal level of 3dBµ and
an unwanted signal level of 68dBµ.
Overall distortion 10% or better
Signal-to-noise ratio 40dB or more
Rated audio output 2W (4Ω)
External speaker output level 0dBm (600Ω, unbalanced)
De emphasis characteristics 6dB/oct, +1dB, –3dB
Radiation 4000µµW or less
DSC message files For distress messages: 20
For other messages: 10
8.1 Main Unit (JHS-32B)
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