3-30 Service Guide
Adjustments and Correction Constants 8719ET/20ET/22ET
Blanking Adjustment (Test 54) 8719ES/20ES/22ES
RF Network Analyzers
Blanking Adjustment (Test 54)
This adjustment sets the output power level during retrace. If incorrectly adjusted, the
first data points in a sweep may not be stable.
Required Equipment and Tools
Analyzer warmup time: 30 minutes.
Power meter warmup time: 30 minutes.
Preparing the Instrument
1. With the analyzer turned off, remove the top two corner standoffs and the top cover.
2. Locate the metal source assembly cover that is on the top-left, front-side of the
instrument.
3. Unplug the flexible SMB cables coming out of the source assembly cover.
NOTE The 8719ET/ES and the 8720ET/ES have 2 SMB cables. The 8722ET/ES have
4 SMB cables. All cables are clearly marked for easy re-assembly.
4. Remove the 3 screws on source assembly cover and lift it off the frame.
5. Reattach the SMB cables to the proper connectors.
6. Turn the analyzer on. If it does not phase lock, check the cable connections.
7. Zero and calibrate the power meter and connect the power sensor to PORT 1
(REFLECTION port on the ET models).
8. Press .
9. Press .
10.For the location of the blanking adjustment, refer to Figure 3-6. Adjust it to obtain the
value indicated on the analyzer display.
Equipment Description 8719ET/ES
8720ET/ES
8722ET/ES
Power Meter 436A, 437B, 438A, E4418A (EPM-441A) or
E4419A (EPM-442A)
Power Sensor 8485A 8487A
Adapter 3.5-mm (f) to 3.5-mm (f) part number 85052-60012
(part of 85052B)
N/A
Adapter 2.4-mm (f) to 2.4-mm (f) N/A part number 85056-60006
(part of 85056A)
Non-Metallic Adjustment Tool part number 8830-0024
Preset
Preset Sweep Setup
50.5 M/µ
System
54
x1
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