Intek M-150 Plus Service Manual page 11

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Customer: INTEK

1. UUT set to FM I2 CH19, input of power-meter to antenna input terminal. Input of MIC socket to the audio frequency

signal generator output terminal. Mic Gain set to maximum. Compander set to Off.

2. Set audio frequency signal generator @ FREQ.: 1000Hz Output level: 50mVrms.

10uF capacitor in series between the AF signal O/P and UUT input.

3. Set UUT to TX mode, adjust RV1 for 1.6KHz deviation on modulation meter.

4. Decrease the AF output level. Check the 1.2KHz deviation modulation sensitivity should be between 8 -15 mV;

Compander set On, Check the 1.2KHz deviation modulation sensitivity should be between 3-8 mV.

5. Turn the AF output level for 1.2KHz deviation on modulation meter, check the modulation distortion must be less than

5.0% on the audio distortion meter for Compander On and Off..

Set UUT to AM mode; Set audio frequency signal generator @ FREQ.: 1000Hz Output level: 50mVrms.

Set UUT to TX mode, adjust RV3 for 90% deviation on modulation meter.

Decrease the AF output level. Check the 50% deviation modulation sensitivity should be between 8-15 mV;

Compander set On, Check the 50% deviation modulation sensitivity should be between 3-8 mV.

Turn the AF output level for 60% deviation on modulation meter, check the modulation distortion must be less than

5.0% on the audio distortion meter for Compander On and Off..

4.3.4 PA audio output checking:

1. The UUT enter PA mode after long press the "ANL" key, Volume set maximum position for M-150, and the MIC gain

set maximum position for M-760. 1KHz audio input.

2. Turn to TX mode, the PA output must meet the DTS.

5.0 TEST MODE DESCRIPTION，Model Selection and International Band Select:

1. For M-760, Press both keys of "ANL" & "Scan" synchronously, then turn on the DC power enter test mode. Press

the "ENG" key for Software version checking, press the Channel "Down" key for LCD segments scanning checking.

2. For M-150, Press both keys of "ANL" & "DN" synchronously, then turn on the DC power enter test mode. Press the

"ENG" key for Software version checking, press the Channel "Down" key for LED segments scanning checking.

3. RX & TX parameter test: Press the "channel up" key can select Germany CH41 (26.565MHz), CH19(27.185MHz),

EU CH22(27.225MHz) and UK CHU40(27.99125MHz), PO CH01A and RU CH40L.

4. EEPROM control for VCO alignment for Channel RU 14D, RU 15D, RU 21G and RU 22G.

5. VCO Alignment Channel: PO band CH01A(25.610MHz) ---- Low channel; RU band channel CH40L(30.105MHz)

---- High channel.

Model selection

Model select: M-150 R146 = N/A and R145 = 10K; M-760 R146 = 47K and R145 = N/A. (CPU PIN64 pull high for M-150;

CPU PIN64 pull low for M-760)

International Band select: "IB" pad open for European band only, International band disable; "IB" PAD shorting that the

International band enable and the European band enable also. (CPU pin 21 pull high for International Band)

Model No: M150 Plus

and

European band and International band

selection.

Rev No: A

Note: Should be add one