Technical data

3-48 Chapter 3
Adjustments and Correction Constants
Fractional-N Spur Avoidance and FM Sideband Adjustment
Figure 3-22 Fractional-N Spur Avoidance and FM Sideband Adjustment Setup
3. Set the spectrum analyzer measurement parameters as follows:
Reference Level 0 dBm
Resolution Bandwidth 100 Hz
Center Frequency 676.145105 MHz
Span 2.5 kHz
4. On the network analyzer, press
.
5. Remove the upper-rear corner bumpers and the top cover, using a torx screwdriver.
6. Adjust the 100 kHz (R77) for a null (minimum amplitude) on the spectrum analyzer.
The minimum signal may, or may not, drop down into the noise floor.
Preset Avg
IF BW
3000 x1 Sweep Setup
CW FREQ
676.045105 M/µ