13. Measurement and Adjustments
13.1. Tuner Section
13.1.1. Measuring Instruments and Special Tools
- AM signal generator (AM-SG)
- EVM-AC (AC Electronic voltmeter)
- EVM-DC (DC Electronic voltmeter)
- Osciloscope
- Choke coil (100 H)
- AM loop antenna
Note:
- Trimmer will be instability that once you tighten, please adjust with
tighten slowly from loosened condition.
- Adjust OSC coil and IFT with nonmetal driver.
13.1.2. AM IF Adjustment
1. Connect the instrument as shown in Fig.1.
2. Set the unit to AM mode.
3. Apply signal sa shown in Fig.1 from AM-SG.
4. Adjust Z102 so that the output frequency is maximized in Fig.2.
Fig.1
Fig.2
56