ADJUSTMENT MODE ADJUSTMENTS (Continued)

The following adjustment must be performed at “ADJUSTMENT MODE”.

ADJUSTMENT

 

 

ADJUSTMENT CONDITION

OPERATION

 

 

 

 

 

 

 

 

 

S-METER

1

• Displayed frequency :

 

 

 

Push the [BAND] key.

 

 

 

(SM ch.) 1.620 MHz

 

 

 

 

 

• Mode

: FM

 

 

 

 

 

 

• Connect the SSG to the antenna connector and set as:

 

 

 

 

Level

: 0.63 µV* (–111 dBm)

 

 

 

 

 

 

Modulation

: 1 kHz

 

 

 

 

 

 

Deviation

: ±3.5 kHz

 

 

 

 

 

• Receiving

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

• Same operation as step 1 for the listed frequencies and SSG

Push the [BAND] key.

 

 

 

level shown below.

 

 

 

 

 

 

• Some adjustment frequencies must adjust both FM and WFM

 

 

 

 

modes.

 

 

 

 

 

 

 

 

 

When adjust the WFM mode, set the SSG’s deviation as

 

 

 

 

±52.5 kHz.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ADJUSTMENT freq.

 

SSG level (FM)

SSG level (WFM)

 

 

 

 

(SM Ch.) 28.100 MHz

 

0.5 µV (–113 dBm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(SM Ch.) 51.000 MHz

 

0.5 µV (–113 dBm)

1.8 µV (–102 dBm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(SM Ch.) 145.100 MHz

 

0.5 µV (–113 dBm)

1.8 µV (–102 dBm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(SM Ch.) 180.100 MHz

 

0.63 µV (–111 dBm)

3.2 µV (– 97 dBm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(SM Ch.) 435.100 MHz

 

0.5 µV (–113 dBm)

 

 

 

 

 

 

 

 

 

 

 

 

 

(SM Ch.) 520.100 MHz

0.79 µV (–109 dBm)

3.2 µV (– 97 dBm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(SM Ch.) 729.100 MHz

 

0.5 µV (–113 dBm)

3.2 µV (– 97 dBm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*This output level of the standard signal generator (SSG) is indicated as SSG’s open circuit.

• AF UNIT

IC151, pin 12 (SD line)

RF Tracking check point

5 - 14

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Image 31
Icom IC-T90A manual Adjustment Adjustment Condition Operation, Meter