3-44 Service Guide
Adjustments and Correction Constants 8719ET/20ET/22ET
API Spur Avoidance and 100 kHz FM Sideband Adjustment 8719ES/20ES/22ES
RF Network Analyzers
API Spur Avoidance and 100 kHz 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.
Required Equipment and Tools
Network Analyzer warmup time: 30 minutes.
Spectrum Analyzer warmup time: 30 minutes.
FM Sideband Adjustment (100 kHz Spurs)
1. The object of this test is to make the spur levels for all 3 frequencies equal. Connect the
equipment as in Figure 3-11.
Equipment Description 8719ET/ES 8720ET/ES 8722ET/ES
Spectrum Analyzer 8591E Opt. 130
RF cable 50 ohm,Type N, 24 inch 11500C
RF cable 50 ohm, 24 inch BNC type part number 8120-2582
Non-metallic Adjustment Tool part number 8830-0024
Adapter 2.4-mm (f) to Type-N (f) N/A 11903B
Adapter 3.5 mm (f) to Type-N (f) part number 1250-1745 N/A
Antistatic Wrist Strap part number 9300-1367
Antistatic Wrist Strap Cord part number 9300-0980
Static-control Table Mat and Earth
Ground Wire
part number 9300-0797
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