Icom ID-31A Service Manual page 21

5-3 TRANSMIT ADJUSTMENT (Continued)
• TONE DEVIATION ADJUSTMENTS
Select an adjustment item using
ADJUSTMENT
ADJUSTMENT
TONE DEVIATION
[DTCS]
(FM)
(FM-N)
[CTCSS]
(FM)
(FM-N)
[DTMF]
(FM)
(FM-N)
[EURO TONE]
(FM)
(FM-N)
/
, and then set the adjustment value as specifi ed using [DIAL].
ITEM
1 1) Set the power supply voltage to 7.4 V.
2) Connect a modulation analyzer to the antenna connector through
an attenuator, and then set it as;
HPF
–
LPF
De-emphasis : OFF
Detector
3) No audio signal is applied.
2 • While transmitting, adjust the deviation using [DIAL], and then
push [ENT] to store the adjustment value.
[MDT]
3
[MCT]
4
[MDM]
5
[MET]
OPERATION
: OFF
: 20 kHz
: (P-P)/2
5 - 6
VALUE
–
±0.7 to ±0.8 kHz
±0.325 to
±0.425 kHz
±0.7 to ±0.8 kHz
±0.325 to
±0.425 kHz
±3.4 to ±3.6
kHz
±1.65 to ±1.85
kHz
±3.4 to ±3.6
kHz
±1.65 to ±1.85
kHz