Japan Radio Co. JSS-2150, Service Manual

Page: 21 / 160

CONFIGURATION AND SPECIFICATIONS
1-7
z Transmitter
Antenna output power 1605.0 - 3999.9 kHz : 75/ 100Wpep (Low: 33Wpep)
4000.0 - 27500.0 kHz : 75/ 100/ 150Wpep (Low: 50Wpep)
Modulation method Low-power stage balanced modulation
Occupied bandwidth J3E/ J2D/ H2B : Within 3 kHz
F1B/ A1A : Within 0.5 kHz
Carrier suppression (J3E) 40 dB or more
Unwanted emissions in the
out-of-band domain Mean power of 50 mW or lower, or 43 dB or more lower than the
mean power of the basic frequency
Unwanted emissions in the spurious
domain At J3E:
1.5 to 4.5 kHz : 31 dB or more
4.5 to 7.5 kHz : 38 dB or more
7.5 kHz and upwards : 43 dB or more
(Peak power of unwanted emissions is 50 mW or less.)
At F1B:
Mistuned frequency [Hz]
Attenuation [dB]
Overall distortion and noise -20 dB or less
AF frequency response Deviation is within 6 dB in 350 Hz to 2700 Hz range.
Tone frequency 1500 Hz or 1400 Hz
z
Receiver
Receiving system Double superheterodyne
1st IF 70.036 MHz
2nd IF 36 kHz
Reception frequency stability Within ±10 Hz
Sensitivity (SINAD 20dB) J3E : 2.5 uV or less (1605.0 to 27500.0 kHz)
F1B : 0.7 uV or less (1605.0 to 27500.0 kHz)
A1A : 1.4 uV or less (1605.0 to 27500.0 kHz)
Pass band/Adjacent signal
selectivity J3E : 2.4 - 3.0 kHz (6 dB bandwidth) within
±2.1 kHz (66 dB bandwidth)
F1B : 270 - 300Hz (6 dB bandwidth) within
±550 Hz (60 dB bandwidth)
Spurious response J3E : 60 dB or more
F1B : Symbol error rate of 1% or better at a wanted signal level
of 10 uV and an unwanted signal level of 31.6 mV
separated by 750 Hz
Blocking/Desensitization J3E : When an unwanted signal level separated by 3 kHz is
added to the wanted signal level of 10 uV, the unwanted
signal input voltage suppressing output of the wanted
signal by 3 dB is 10 mV or more.
F1B : Symbol error rate of 1% or better at a wanted signal level
of 10 uV and an unwanted signal level of 1 mV
separated by 500 Hz
Overall distortion and noise When an input signal level of 30 uV is applied, the ratio between
low-frequency output 1000 Hz and unwanted components contained
in that output is 30 dB or more.
Conducted spurious emission Power emitted from antenna terminal is 2 nW or less (9kHz - 2GHz)
and 20 nW or less (2GHz - 4GHz).
Clarifier variable range ±200 Hz (1 Hz steps)
Antenna impedance 50 Ω unbalanced
Line output 0 dBm 600 Ω (balanced)