The JHS-7 is a hand-held portable VHF radiotelephone for on-scene, life-saving two-way communication between survival craft, between survival craft and ship, an
|GENERAL||Standard||IMO Res.A.569(14), A.605(15);
Radio Regulations Appendices 18 and 19
|Operating channels||CH 16 (156.800 MHz)
CH 6 (156.300 MHz)
CH 13 (156.650 MHz)
CH 15 (156.750 MHz)
CH 17 (156.850 MHz)
CH 67 (156.375 MHz)
|Optional channles||Seven simplex channels selectable form a range of 156.300 to 156.875 MHz|
|Channel spacing:||25 kHz|
|Channel selection||CH 16 – by one-touch selector switch
Other CHs – by a rotary dial knob
|Local oscillator||PLL frequency synthesizer|
|Frequency stability||Within 10 ppm (TX)|
|Class of emission||G3E/F3E|
|Type of antenna||Vertical, omnidirectional type integrated antenna|
|Operating time||More than 8 hours at the duty cycle of 1:9|
|Integrated battery||Ni-Cd battery7.2VDC, 1000mAH
|Operating temperature||-20degC to +55degC|
|TRANSMITTER||Effective radiated power:||0.25 to one watt|
|Type of modulation||Variable reactance frequency modulation|
|Frequency deviation||±5 kHz max.|
|Pre-emphasis||6dB (+1 dB, -3 dB)/octave|
|AF harmonic distortion||Better than 10%|
|RECEIVER||Receiving system||Double superheterodyne|
|AF output power||200mW or more at 10% THD|
|De-emphasis||-6 dB (+1 dB -3 dB)/octave|
|Maximum usable sensitivity||+6 dBuV or less (20 dB noise quieting)|
|Selectivity||12kHz or more at 6dB attenuation
25kHz or less at 70dB attenuation
|Frequency Satbility||Better than 0.001%|
|Spurious response rejection||70 dB or more|
|Intermodulation response||70 dB or more|
|Blocking||90 dBuV or more|
|Radiotelephone||JHS-7||1||Incl. Antenna and battery|
|Ledge for three Battery chargers (Horizontal type)||NZB-90|
|Ledge for four Battery chargers (Horizontal type)||NZB-91|
|Ledge for five Battery chargers (Horizontal type)||NZB-92|
|Ledge for three Battery chargers (Vertical type)||NZB-93|
|Ledge for four Battery chargers (Vertical type)||NZB-94|
|Ledge for five Battery chargers (Vertical type)||NZB-95|
The JHS-7 is a hand-held portable VHF radiotelephone for on-scene, life-saving two-way communication between survival craft, between survival craft and ship, and between ship and rescue boat in accordance with SOLAS convention.
The JHS-7 is of heavy duty design for use maritime severe conditions and equipped with 13 single-frequency voice channels including Channel 16 (156.800 MHz), providing 0.25 to one watt of transmitted power.
This equipment can be used as an on-board communication equipment.
Thirteen single-frequency voice channels are provided including Channel 16 for calling and safety which can also be selected easily by an independent switch.
The JHS-7 is designed to operate normally for 8 hours in extremely severe operating conditions.
The control knobs and switches are in easy-to-operate arrangement to ensure single-handed operation.
The JHS-7 is designed to withstand a 1-m drop onto a hard surface.
The JHS-7 is designed to be waterproof to ensure its normal use even in rainy or water splash conditions.
If the JHS-7 is long exposed to the sunlight, it will not be damaged because it is composed of specially selected components and materials.
The JHS-7 is designed to minimize its power consumption and to maximize its operating time. Its sleep mode technique ensures more than 8 hours of its operation time.
Highly reliable ICs, transistors, LEDs and other surface-mount devices are used.