Icom IC-F521 Service Manual

5 - 5
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT LOCATION
REFERENCE
FREQUENCY
[TXF]
1 • Operating CH : CH6 Rear
panel
Loosely couple a frequency
counter to the antenna con-
nector.
174.0000 MHz
• Connect an RF power meter or 50
Ω
dummy load to the antenna connector.
• Transmitting
OUTPUT
POWER
[Power (Hi)]
1 • Operating CH
• Transmitting
: CH3 Rear
panel
Connect an RF power meter
to the antenna connector.
25.0 W [25W]
50.0 W [50W]
[Power (L2)] 2 • Operating CH
• Transmitting
: CH2 10.0 W [25W]
25.0 W [50W]
[Power (L1)] 3 • Operating CH
• Transmitting
: CH1 2.5 W [25W]
5.0 W [50W]
MODULATION
BALANCE
[Balance]
1 • Operating CH : CH1 Rear
panel
Connect an FM deviation me-
ter with an oscilloscope to the
antenna connector through an
attenuator.
Set to square wave
form
• Preset [MOD W] : 100
• No audio is applied to the [MIC] connec-
tor.
• Set an FM deviation meter as:
HPF
LPF
De-emphasis
Detector
: OFF
: 20 kHz
: OFF
: (P–P)/2
• Push [P0] while transmitting
FM
DEVIATION
[MOD W]
1
• Operating CH : CH1
Rear
panel
Connect an FM deviation me-
ter to the antenna connector
through an attenuator.
±
4.10 kHz [W/N]
±
3.30 kHz [M/N]
• Connect an audio generator to the [MIC]
connector through the JIG cable and set
as
: 1.0 kHz/40 mVrms
• Set an FM deviation meter as:
HPF
LPF
De-emphasis
Detector
• Transmitting
: OFF
: 20 kHz
: OFF
: (P–P)/2
[MOD N] 2
• Operating CH
• Transmitting
: CH4
±
2.10 kHz
CTCSS/DTCS
DEVIATION
[CTCSS/DTCS]
1
• Operating CH : CH5
Rear
panel
Connect an FM deviation me-
ter to the antenna connector
through an attenuator.
±
0.70 kHz [W/N]
±
0.56 kHz [M/N]
• No audio is applied to the [MIC] connec-
tor.
• Transmitting
5-3 SOFTWARE ADJUSTMENT (TRANSMITTING)
Select an operation using [
↑
] / [
↓
] keys, then set specifi ed value using [
←
] / [
→
] keys on the connected computer keyboard.

Icom IC-F521 Specifications

General

Brand	Icom
Model	IC-F521
Category	Transceiver
Language	English