Icom IC-F4261DT - Transmitter Adjustments

5 - 6
ADJUSTMENT
TRANSCEIVER’S
CONDITION
OPERATION
ADJUST-
MENT
ITEM
VALUE
TX OUTPUT
POWER
(Hi power)
1 • Channel : 1-8
• Transmitting
• Connect an RF power meter to the an-
tenna connector. [Power (Hi)]
5 W
(L2 power) 2 • Channel : 1-9
• Transmitting
[Power (L2)] 2 W
(L1 power) 3 • Channel : 1-10
• Transmitting
[Power (L1)]
1 W
MODULATION
BALANCE
1 • Channel : 1-11
• Transmitting while
holding down [P0].
• Set [MOD N] to “80.” [MOD N] 80
2• Connect a modulation analyzer with an
oscilloscope to the antenna connector,
through an attenuator, and set it as;
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P–P)/2
[BAL (Narrow)]
Square waveform
No over or under shoot.
As flat as possible.
FM DEVIATION
- Narrow mode -
(band center)
1 • Channel : 1-12
• Transmitting
• Connect an audio generator to the exter-
nal MIC terminal, and then set it as;
Frequency : 1 kHz
Waveform : Sin wave
Level : 150 mVrms
• Connect a modulation analyzer to the an-
tenna connector, through an attenuator.
[MOD N C]
±2.05 to ±2.15
kHz
(band low) 2 • Channel : 1-13
• Transmitting
[MOD N L]
(band high) 3 • Channel : 1-14
• Transmitting
[MOD N H]
- Middle mode -
(band center)
4
†
• Channel : 1-15
• Transmitting
[MOD M C]
±3.20 to ±3.30
kHz
(band low) 5
†
• Channel : 1-16
• Transmitting
[MOD M L]
(band high) 6
†
• Channel : 1-17
• Transmitting
[MOD M H]
- Wide mode -
(band center)
7
‡
• Channel : 1-18
• Transmitting
[MOD W C]
±4.05 to ±4.15
kHz
(band low) 8
‡
• Channel : 1-19
• Transmitting
[MOD W L]
(band high) 9
‡
• Channel : 1-20
• Transmitting
[MOD W H]
DIGITAL
DEVIATION
( Band center)
1 • Channel : 1-21
• Transmitting
• Set [Dig Mode] to “7.” [Dig Mode] 7
2• Connect a modulation analyzer to the an-
tenna connector, through an attenuator.
[MOD D C]
±1.35 to ±1.39
kHz
(Band low) 3 • Channel : 1-22
• Transmitting
[MOD D L]
(Band high) 4 • Channel : 1-23
• Transmitting
[MOD D H]
CTCSS/DTCS
DEVIATION
1 • Channel : 1-24
• Transmitting
• Connect a modulation analyzer to the an-
tenna connector, through an attenuator.
[CTCSS/
DTCS]
±0.33 to 0.37 kHz
TONE DEVIATION 1 • Channel : 1-25
• Transmitting while
holding down [P3].
• Connect a modulation analyzer to the an-
tenna connector, through an attenuator. [S.Tone]
±1.50 kHz
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, and then push [ENTER].
*: [Low band] **: [High band] ***: [350 MHz band]
†
: For only [EUR]
‡
: For except [USA]