JRC JHS-770S Instruction Manual page 139

● CH70 Watch Keeping Receiver
Receiving frequency
Receiving system
1st IF
2nd IF
Local oscillation frequency
Local oscillation method
Local Oscillation Frequency
Variance
Sensitivity
Selectivity
De-emphasis characteristics
Co-channel selectivity
Adjacent channel selectivity
Desensitization effect
Spurious response
Intermodulation characteristics
Blocking characteristics
Radiation
DSC/ATIS Modem
●
Modulation rate
Modulation method
Modulation index
Mark Frequency (Y)
Space Frequency (B)
DSC protocol
DSC operation standards
ATIS protocol, operation standards
● Controller
Communication speed
Communication interface
Microphone input impedance
Standard modulation input
Rated audio output
LCD Display
156.525MHz (CH70)
Double superheterodyne
58.1MHz
455kHz
Receiving frequency + 58.1MHz
Frequency synthesizer
-6
±10 x 10 or less
1% or lower symbol error rate at 0dB μV
6dB bandwidth: 12kHz or more, 70dB selectivity: 25kHz or less
6dB/oct, +1dB, -3dB
Symbol error rate of 1% or better at a wanted signal level of 3dB μV
and an unwanted signal level of -5dB μV
Symbol error rate of 1% or better at a wanted signal level of 3dB μV
and an unwanted signal level of 73dB μV
Symbol error rate of 1% or better at a wanted signal level of 3dB μV
and an unwanted signal level of 73dB μV
Symbol error rate of 1% or better at a wanted signal level of 3dB μV
and an unwanted signal level of 73dB μV
Symbol error rate of 1% or better at a wanted signal level of 3dB μV
and an unwanted signal level of 68dB μV
Symbol error rate of 1% or better at a wanted signal level of 3dB μV
and an unwanted signal level of 93dB μV
9kHz - 2GHz: 2nW or less
-6
1200baud ±30ｘ10 or less
FSK
DSC: 2.0±10%
ATIS: 1.0±10%
1300Hz ±10Hz or less
2100Hz ±10Hz or less
ITU-R Recommendation M.493-11 (Class A)
ITU-R Recommendation M.541-9, M.689-2, M.821-1, M.1080-0
EN 300 698-1 V1.3.1
9600bps or 57.6kbps
RS-485 and RS-232C
150Ω balanced
-54dBm
Internal speaker (4Ω):
Handset phone (150Ω):
3.8 inch FSTN monochrome, 320 x 240 dot, LED backlight
2W or more
1mW or more
Specifications
9-3