Agilent Technologies 8719ET Service Manual page 114

Adjustments and Correction Constants
Frequency Accuracy Adjustment
NOTE For Option 1D5 Instruments Only: Remove the rear panel BNC to BNC
jumper that is connected between the "EXT REF" and the "10 MHz Precision
Reference," as shown in
3. Press
FACTORY: PRESET
Preset
frequency:
• For the 8719ET/ES, press
• For the 8720ET/ES, press
• For the 8722ET/ES, press
4. No adjustment is required when the frequency counter measurement results are within
specification:
• ±135 kHz for 8719ET/ES
• ±200 kHz for 8720ET/ES
• ±260 kHz for 8722ET/ES
Otherwise, locate the Reference (A12) assembly (red extractors) and adjust the VCXO
ADJ (see Figure 3-9) for a frequency measurement within specifications.
Figure 3-9 Location of the VCXO ADJ Adjustment
3-42
Figure 3-10.
Preset Sweep Setup
.
13.5 G/n
.
20 G/n
.
26 G/n
8719ET/20ET/22ET
8719ES/20ES/22ES
RF Network Analyzers
and select the
CW FREQ
Service Guide