Furuno FM-8500 User Manual

FM-8000
E3-8
3. Adjustment
3.1 Tx Power Adjustment
Item Rating Check Point Adjuster Condition
High Power 20 to 25 W R54 CH16, Power: HI
Low Power Loss than 1 W R56 CH16, Power: LOW
Hot Power 6 to 8 W
ANT connector
R53
CH16, Power: HI
(Temporarily disconnected lead
wire of posistor RT1.)
Note)
Hot power;
It reduces the power automatically to 6 to 7 w when the temperature at the power
amplifiers exceeds 100 degrees (actually 85 degrees) “HI” indication blinks when power
is reduced.
R56 [Low]
R54 [High]
R53 [Hot]
TX Board
To check "HOT"
power,remove RT1
at solder side.
RT1
Power
meter
Frequency
Counter
ANT
MAIN UNIT
VCO
PA
C67
Pick up
Frequency ADJ. Power ADJ.
3.2 Frequency Adjustment
TX Freq. on CH16 (Rating) Conditions Adjuster
156.8 MHz±300Hz
(Rule: ±10ppm)
PTT: ON
C67
(TX Board)
If the frequency is out of the rating, adjust C67 on TX Board to correct.
(Adjust to PLL reference OSC: 8 MHz )

Furuno FM-8500 Specifications

General

Brand	Furuno
Model	FM-8500
Category	Telephone
Language	English