NAVICOM RT-550BT, Руководство пользователя

Страница: 26 / 27

MAINTENANCE
Your VHF Marine Radio RT-550BT is a marine radio of water proof who can meet
45 46
the requirement of JIS level gives you a good reliability when using in marine 7,
circumstance .
The equipment is designed to be maintenance free To keep your radio in good .
working condition :
Never unscrew the equipment either the base station or handset For in , ,
such case the water proof performance will be greatly damaged , .
If the radio becomes dirty and dusty wipe it clean with a moisture cloth but , ,
pay attention to never using such solvents as benzene or alcohol for they ,
may damage the radio surfaces .
Once your equipment does not work properly never allow an unqualified ,
person to tamper with internal adjustments Please contact the local dealer .
for help .
TROUBLE SHOOTING
Item Symptom Cause Remedy /
1 Unit can not be powered
on
.
Check the connection to the base
station
.
Check the volume control .
2 No sound comes from
the speaker Set VOL to a suitable level [ ] .
Set squelch to the threshold point .
3 Transmitting is
impossible or high
,
power can not be
selected
.
Check to see if the PTT switch is
defective .
Check to see if the microphone or MIC
jack is defective
.
Some channels are for low power or
receive only change to another channel
, .
Push H L / . to select high power
4 . Low receiver sensitivity Check to see if the antenna being bad
connected
.
Check the connection between coaxial
cable and base station
.
SPECIFICATION
TX Frequency ………………………… ... ……… 156.025 ~ 157.425 MHz
RX Frequency ............. ………………………… 156.050 ~ 162.025 MHz
Channels ........................ …………………………… .. 57 USA Channels
57 INT Channels
Modulation type ......................... ……………………… .. …………… ... FM
Antenna impedance ........................... ……………………… ...... 50 Ohm
Microphone ............................... …………………… ...... condenser type
Power supply .................................... ………………………… .. 13.8V DC
Sensitivity at dB Sinad 12 ....................................... …………… . 0.25
µ
V
Adjacent Channel Rejection ................................ …………… ........ 70dB
Audio output power ............................. …………… ........... 4 4 W Ohm @
Audio Distortion ............................... ……………………… ............... 5%
RF Output Power .................... ………………… ... High W/Low W : : 25 1
Harmonic Emissions ................ …………… ... High dB Low dB : / : 80 60
Dimensions HWT ( ).......................................... …… ..... 71×161×147mm
Weight ………………… ................................... ………………… ... 1290g
Navicom RT-550BT Navicom RT-550BT
8 9