JRC JHS-7 - Specifications; Transmitter; Receiver

2
2. SPECIFICATIONS
2.1 General
(1) Operating channels: CH16 （156.800MHz）
CH6 （156.300MHz）
CH13 （156.650MHz）
CH15 （156.750MHz）
CH17 （156.850MHz）
CH67 （156.375MHz）
Note: Usable channels of the JHS-7 for JG flag
are restricted to CH15, CH16, and CH17.
(2) Optional channels: Seven simplex
Channels
selectable from a
range of 156.300 to
156.875MHz
(3) Communication mode: Simplex
(4) Type of emission: G3E/F3E
(5) Antenna: Vertical, non-directional
type (nominal 50Ω)
Gain -3dB
(6) Continuous operation:
More than 8 hours in a duty cycle of 6
seconds of transmission, 6 seconds of
reception and 48 seconds of stand-by.
(7) Power source: Primary battery
(9.0VDC, 4800mAH)
Secondary battery
(7.2VDC, 1000mAH)
(8) Warm-up time: Less than 5 seconds
(9) CH switching period: Less than 5 seconds
(10) Tx/Rx switching period: Within 0.3 seconds
(11) Operating temp range: －20℃ to ＋55℃
(12) Storage temp range: －30℃ to ＋70℃
(13) Humidity: 93％ at 40℃
(14) Safety distance from standard
magnetic compass: 0.4m
(15) Safety distance from steering
magnetic compass: 0.4m
(16) Shock resistance:
No troubles after a fall on the hard wood
floor from a height of 1m.
(17) Vibration resistance:
No troubles after vibrations, up and down,
right and left, and back and forth for
15min. under each of the following
conditions:
60 to 750times/min., full amplitude of
3.2mm;750 to 1500 times/min., full
amplitude of 0.76mm; and 1500 to 3000
times/min., hull amplitude of 0.2mm
(18) Water-tightness:
Operates normally after it is immersed in
water to the depth of one meter for 5 min.
(19) Overall dimensions: 64(W)×
165(H)×45.5
(D)
mm
(Exc. pr
ojections)
(20) Weight: Approx. 600g
2.2 Transmitter
(1) Carrier output power: 0.8W
(2)
Effective radiated power : More than 0.25W
(3) Oscillation: Freq synthesizer
(4) Modulation: Variable reactance
frequency modulation
(5) Frequency stability: Within 10×10
－
6
(6) Pre-emphasis: 6dB per octave
(7) Modulation frequency: 300 to 3000Hz
(8) Splatter filter: 40log(f/3), f=3 to
15kHz
(9) Occupied bandwidth: Within 16kHz
(10) Max FRQ deviation: Within ±5kHz
(11) Distortion: 10％ or less, standard
modulation
(12) Mod input impedance: 600Ω
2.3 Receiver
(1) Receiving system:
Double superheterodyne
1st IF: 21.7MHz
2nd IF: 455kHz
(2) Max usable sensitivity: 6dBμ or less,
S+N+D/N ratio of
20dB
(3) Selectivity: 6dB bandwidth :
12kHz or more
70dB bandwidth:
25kHz or less
(4) Spurious response: 70dB or more
(5) Local FRQ variation: 0.001% or less
(6) Blocking: 90dBμ or more
(7) Intermodulation: 70dB or more
(8) De-emphasis: 6dB per octave
(9) Rated AF output power: 200mW or more (with
distortion rate of 10％)
(10) Distortion: 10％ or less
(11) Squelch sensitivity: Not more than
maximum usable
sensitivity level, and
not exceeds +30dBμ.
(12) Speaker impedance: 8Ω