TWO-WAY VHF RADIOTELEPHONE ON-BOARD COMMUNICATION EQUIPMENT JHS-7

VHF radio and UHF onboard communications
VHF Radio Telephone

Outline

GENERAL

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.

FEATURES

Thirteen Operating Channels

Thirteen single-frequency voice channels are provided including Channel 16 for calling and safety which can also be selected easily by an independent switch.

Heavy Duty Design

The JHS-7 is designed to operate normally for 8 hours in extremely severe operating conditions.

Single-Handed Operation

The control knobs and switches are in easy-to-operate arrangement to ensure single-handed operation.

Mechanical Ruggedness

The JHS-7 is designed to withstand a 1-m drop onto a hard surface.

Watertightness

The JHS-7 is designed to be waterproof to ensure its normal use even in rainy or water splash conditions.

Sunlight resistance

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.

Low Power Consumption

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.

High Reliability

Highly reliable ICs, transistors, LEDs and other surface-mount devices are used.

Specifications / Components

SPECIFICATIONS

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)
	Communication mode	Simplex
	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 NiMH Battery
	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

STANDARD COMPONENTS

Item	Model	Q'ty	Remarks
Radiotelephone	JHS-7	1	Incl. Antenna and battery
Battery Pack	NBB-389	1
Carrying Strap	MPX02384	1
Test Data		1
Instruction Manual		1

OPTIONS

Item	Model
Battery Charger	NBA-4141
Battery Pack	NBB-248A
Earphone	6UMJD00004
External Speaker/Microphone	6UMJD00029
Carrying case	MPX02368
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

Two-way VHF Radiotelephone On-board Communication Equipment JHS-7