Technical data

Chapter 3 3-47
Adjustments and Correction Constants
Fractional-N Spur Avoidance and FM Sideband Adjustment
Fractional-N Spur Avoidance and FM Sideband
Adjustment
This adjustment minimizes the spurs caused by the API (analog phase interpolator, on the
fractional-N assembly) circuits. It also improves the sideband characteristics.
Analyzer warmup time: 30 minutes.
Required Equipment and Tools
Procedure
1. Connect the equipment as shown in Figure 3-22.
2. Make sure the instruments are set to their default GPIB addresses:
network analyzer = 16, spectrum analyzer = 18.
Description HP/Agilent Part or Model Number
Spectrum analyzer 8563E
Power splitter 11667A Option 001
Attenuator 10 dB 8491A Option 010
BNC cable 8120-1840
GPIB cable 10833A/B/C/D
RF cable set 11851B
Non-metallic adjustment tool 8830-0024
TORX screwdriver T-15
Antistatic wrist strap 9300-1367
Antistatic wrist strap cord 9300-0980
Static-control table mat and earth ground wire 9300-0797