Model No: M150 Plus
Customer: INTEK Rev No: A
8
B. RX test equipment setup:
SINAD Meter RF Signal Power
Generator Supply
Distortion 8 ohm Radio
Meter loading U.U.T.
Oscilloscope
Note: U.U.T. = device under test
Alignment Procedure.
4.1
VCO Adjust.
4.1.1 VCO Voltage Adjust:
Test point TP1 connect to the multi-meter
，
set UUT enter test mode. Press channel “UP” key to select CH01A of Poland
Band in FM mode.
1.
Adjust IFT L17 for 1.0
±
0.1V on the Multi-meter read
，
and then checking CH40L of RU Band should be less than
3.8V, and then check AM mode
CH01A
≥
0.8V
，
CH40L
≤
3.8 V
2.
Set UUT for TX MODE
：
Check
CH01A
≥
0.8V
，
CH14D
≤
3.8V; CH15D
≥
0.8V, CH21G
≤
3.8V; CH22G
≥
0.8V,
CH40L
≤
3.8V.
3.
Turn to AM mode and repeat above item 2.
4.2 RX Section Alignment . ( FM and AM )
4.2.1 Audio Distortion Adjust:
1.
UUT set to FM mode CH19
，
output of RF signal generator connect to
TP2
. Audio dummy load connect to
EXT.
Speaker
. (@8
Ω
load)
2.
Set RF S.S.G Freq.: 10.695MHz
，
Mod.:
±
1.2KHz
，
Fmod.: 1KHz, Output level:1mV.
3.
Squelch Volume set to minimum position, volume control set to around middle position.
4.
Adjust IFT L20 for maximum audio output and minimum distortion at the distortion meter. ( distortion less than 5%).
5.
Set volume control to maximum position, audio output power shall be more than 3 Watts.
6.
UUT set to AM mode CH19
，
output of RF signal generator connect to
TP2
. Audio dummy load connect to
EXT.
Speaker
. (@8
Ω
load)
