Icom IC-F4101D, Service Manual, Page: 17 / 38

5 - 5
ADJUSTMENT
TRANSCEIVER’S
CONDITION
OPERATION
ADJUSTMENT
ITEM
VALUE
TX OUTPUT
POWER
(Hi power) 1 • Channel : 1-4
• Transmitting
• Connect an RF power meter to the an-
tenna connector. [Power (Hi)]
4.0 W
(L2 power) 2 • Channel : 1-5
• Transmitting
[Power (L2)] 2.0 W
(L1 power) 3 • Channel : 1-6
• Transmitting
[Power (L1)]
1.0 W
MODULATION
BALANCE 1
–
• Set “MOD -Narrow-” to “90,” and set the
TX mode to “2” on the “ADJUSTMENT
UTILITY” screen.
[MOD -Narrow-] 90
[TX mode] 2
2 • Set the coursor on [BAL Start] to enter the “MODULATION BAL-
ANCE” adjustment mode.
[BAL Start] –
(Band low) 3 • Channel : 1-7
• Transmitting
• Connect a modulation analyzer with an
oscilloscope to the antenna connector
through an attenuator, and set it as;
HPF : OFF
LPF : 15 kHz
De-emphasis : OFF
Detector : (P–P)/2
[BAL 1]
(Band center) 4 • Channel : 1-8
• Transmitting [BAL 2]
(Band high) 5 • Channel : 1-9
• Transmitting [BAL 3]
6 • Set the coursor on [BAL Start] to quit the “MODULATION BAL-
ANCE” adjustment mode.
[BAL Start] –
FM DEVIATION
-Narrow-
(Band low) 1 • Set the coursor on [MOD N Start] to enter the “FM DEVIATION
-Narrow-” adjustment mode.
[MOD N Start]
–
2 • Channel : 1-10
• Transmitting
• Connect a modulation analyzer to
the antenna connector through an
attenuator, and set it as “MODULATION
BALANCE.”
• Connect an audio generator to the [MIC]
jack through the JIG cable, and set it as;
Frequency : 1 kHz
Waveform : Sinewave
Level : 150 mVrms
[MOD N L]
±2.05 to ±2.15
kHz
(Band center) 3 • Channel : 1-11
• Transmitting
[MOD N C]
(Band high) 4 • Channel : 1-12
• Transmitting
[MOD N H]
5 • Set the coursor on [MOD N Start] to quit the “FM DEVIATION
-Narrow-” adjustment mode.
[MOD N Start]
–
FM DEVIATION
-Wide-*
(Band low) 1 • Set the coursor on [MOD W Start] to enter the “FM DEVIATION
-Wide-” adjustment mode.
[MOD W Start]
–
2 • Channel : 1-13
• Transmitting
• Connect a modulation analyzer to
the antenna connector through an
attenuator, and set it as “MODULATION
BALANCE.”
• Connect an audio generator to the [MIC]
jack through the JIG cable, and set it as
“FM DEVIATION -Wide-.”
[MOD W L]
±4.05 to ±4.15
kHz±
(Band center) 3 • Channel : 1-14
• Transmitting
[MOD W C]
(Band high) 4 • Channel : 1-15
• Transmitting
[MOD W H]
5 • Set the coursor on [MOD W Start] to quit the “FM DEVIATION
-Wide-” adjustment mode.
[MOD W Start]
–
*: For all models except [USA].
5-3 TRANSMIT ADJUSTMENTS
1) Select an adjustment item using [
↑
]/[
↓
] on the PC's keyboard.
2) Set or modify the adjustment value as specifi ed using [
←
]/[
→
] on the PC's keyboard, then push [ENTER].
No over or under shoot.
As flat as possible.