Icom IC-M220

4-3
ADJUSTMENT
TRANSCEIVER’S
CONDITION
OPER ATION
ADJUSTMENT
ITEM
VALUE
REFERENCE
FREQUENCY
-Verication-
1 • Operating channel: 16
• Transmitting
• Connect the RF power meter
(or dummy load) to the antenna
connector.
• Loosely coupled the frequency
counter to the antenna connector.
• No audio signal is applied to the
FRONT MIC JACK.
– 156.800 MHz
(±500 Hz)
4-3 RECEIVE ADJUSTMENTS
1) Select an adjustment item by pushing [↑]/[↓] on the PC keyboard.
2) Set or modify the adjustment value as specied by pushing [←]/[→], and then push [Enter] to store the value.
ADJUSTMENT
TRANSCEIVER’S
CONDITION
OPER ATION
ADJUSTMENT
ITEM
VALUE
RECEIVE
SENSITIVITY
-Verication-
1 • Operating channel: 16
• Receiving
• Connect an standard signal generator
(SSG) to the antenna connector and
set it to:
Frequency: 156.800 MHz
Modulation: 1 kHz
Deviation: ±3.0 kHz
Level: –10 dBμ (–117 dBm)
• Connect the distortion meter to SP+
(blue) and SP− (black) lines of the AF
out leads.
– 12 dB SINAD
or better
(Band low) 2 • Operating channel: 01
• Receiving
• Set the SSG to:
Frequency: 156.050 MHz
(Band high) 3 • Operating channel: 88
• Receiving
• Set the SSG to:
Frequency: 157.425 MHz
SQUELCH
-Adjustment-
(Threshold)
1 • Operating channel: 16
• Receiving
• Set the SSG to:
Level: –13.5 dBµ (–120.5 dBm)
[RSSI
(Threshold)]
Push [Enter]
(Automatic
adjustment)
(Tight) 2 • Set the SSG to:
Level: –3.5 dBµ (–110.5 dBm)
[RSSI (Tight)]
-Verication- 3 • Operating channel: 16
• SQL: 10
• Receiving
• Set the SSG to:
Level: 0 dBµ (–107 dBm)
– Squelch
open
AUDIO OUTPUT
-Verication-
(Distortion)
1 • Operating channel: 16
• Audio output level: 19
• Receiving
• Set the SSG to:
Level: 60 dBµ (–47 dBm)
– 7 ~ 13%
distortion
(Output level) 2 More than
3.5 W (3.74 V)
RX SIGNAL-TO-
NOISE RATIO
-Verication-
1 • Operating channel: 16
• Receiving
• Set the SSG to:
Level: 40 dBµ (–67 dBm)
• Adjust the AF output to 50% of rated.
• Verify the AF output level di󰀨erence
when a modulated and an
unmodulated signal is received.
– More than
40 dB
RX POWER
CONSUMPTION
-Verication-
1 • Operating channel: 16
• Maximum AF volume
• Maximum LCD brightness
• Receiving
• Set the SSG to:
Level: 60 dBµ (–47 dBm)
• Connect the ammeter between the
DC power connector and the DC
power supply.
– Less than
1.2 A
WX Alert
-Verication-
1 • Operating channel: WX10
• Receiving
• Set the SSG to:
Frequency: 163.275 MHz
Modulation: 1.05 kHz
Deviation: ±3.0 kHz
Level: 0 dBµ (–107 dBm)
– WX Alert
sounds
4-2 FREQUENCY ADJUSTMENTS
1) Select an adjustment item using [↑]/[↓]/[←]/[→] on the PC’s keyboard.
2) Set or modify the adjustment value as specied using [Space]/[Back Space] on the PC’s keyboard.