Chapter 6. Measurement; Adjustment; Output Power - Furuno FM-8800D Service Manual

6.1 Adjustment

6.1.1 Output Power

Adjusts output power for HI, LOW and TEMP REDUCE. Adjustment procedure for
FM-8800D and FM-8800S are the same. Power Data are curried out on the selected
channels and they are not memorized separately for each channel. Therefore, make an
adjustment with intermediate channel (CH14) of VHF.
- HI: 25 W (IEC standard is within 0 dB, –3 dB)
- LOW: Less than 1 W
- TEMP. REDUCE: Adjusts to 14W with output when the temperature sensor in
Handset
Procedure
1. Set to CH14.
2. Call up the option menu. Refer to page 4-1.
- Make a jumper connection between #2 and #15 on [Printer] port
- Or, jumper connection between #25 and #26 of IF-8810
- Press [MENU] -> SYSTEM -> [ENT] -> Input the password
3. Select TX POWER and press [ENT] key. Pop-up window will appear as below.
* TX POWER *
HI
LOW
TEMP. REDUCE

Chapter 6. Measurement

TX/RX board detects 60 degrees.
ANT
FM-8800S
FM-8800D
CH70 ANT
Fig. 6.1.1 Output Measurement Circuit
6-1
50 ohm
Dummy
50 ohm
Power meter
6.1 Adjustment
Antenna
or