Icom IC-F3, Service Manual

Page: 16 / 52

5 - 4
Select an operation using [
↑
]/[
↓
] keys, then set the specified value using [
←
]/[
→
] keys on the connected computer keyboard.
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.
REFERENCE
FREQUENCY
OUTPUT
POWER
FM DEVIATION
BPF1–BPF4
CONVENIENT: The BPF T1–BPF T4 can be adjusted automatically.
q
-1 Set each to 0, then push the [F9] key.
(The cursor must be set to the BPF T1 position.)
q
-2 The connected PC tunes BPF T1–BPF T4 to peak levels.
or
w
-1 Set the cursor to one of BPF T1, T2, T3 or T4 as desired.
w
-2 Push [F8] to start tuning.
w
-3 Pepeat
w
-1 and
w
-2 to perform additional BPF tuning.
• Operating freq. :
136.000 MHz (L-band)
146.000 MHz (H-band)
• High/Low switch : Low
• Transmitting
•Transmitting
• Operating freq. :
143.000 MHz (L-band)
146.000 MHz (H-band)
• High/Low switch : Low
• Transmitting
• High/Low switch : High
• Transmitting
• Operating freq. :
143.000 MHz (L-band)
160.000 MHz (H-band)
• High/Low switch : Low
• Connect an audio generator to the [MIC]
jack and set as:
1 kHz/150 mV
• Set an FM deviation meter as:
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector
: (P–P)/2
• Transmitting
• Operating freq. :
136.000 MHz (L-band)
146.000 MHz (H-band)
• Set an SSG as:
Level : 3.2 µV* (–97 dBm)
Modulation : 1 kHz
Deviation : ±3.5 kHz (W-type)
±1.75 kHz (N-type)
±2.8 kHz (M-type)
• Receiving
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT LOCATION
5-3 TRIMMER ADJUSTMENT for IC-F3/S
1
2
1
2
1
1
Top
panel
Top
panel
Top
panel
Top
panel
Loosely couple a frequency
counter to the antenna connec-
tor.
Connect an RF power meter to
the antenna connector.
Connect an FM deviation meter
to the antenna connector
through an attenuator.
Connect an SSG to the antenna
connector and a SINAD meter
with an 8
Ω
load to the [SP] jack.
136.000000 MHz
(L-band)
146.000000 MHz
(H-band)
136.001360 MHz
(L-band)
146.001460 MHz
(H-band)
1.0 W
5.0 W
±4.2 kHz (W-type)
±2.1 kHz (N-type)
±3.4 kHz (M-type)
Minimum distortion
level
F3/S