Icom IC-M220

4-4
ADJUSTMENT
TRANSCEIVER’S
CONDITION
OPER ATION
ADJUSTMENT
ITEM
VALUE
BIT ERROR
RATIO
-Verication-
1 • Operating channel: 70
• Switch to [Inspection Mode]
and move the cursor to
[DSC Sensitivity].
• Receiving
• Connect an standard signal generator
(SSG) to the antenna connector and set it
to:
Frequency: 156.525 MHz
AFSK:
Modulation/Deviation
1.3 kHz/±2.6 kHz
2.1 kHz /±4.2 kHz
Signal
†
50% Duty or PN9
Modulation rate 1200 bps
Level: 0 dBµ (–107 dBm) emf
• Connect “DATA” terminal of the bit error
meter to NMEAO+ (white) and NMEAO−
(brown) lines of the NMEA out leads, and
“CLOCK” terminal of the SSG to “CLOCK”
terminal of the bit error meter.
– Less than
1%
†
Selected by the SSG installed function.
4-3 RECEIVE ADJUSTMENTS (CONTINUED)
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.