Technical data

Chapter 3 3-43
Adjustments and Correction Constants
Frequency Accuracy Adjustment
NOTE Make sure that the spectrum analyzer and network analyzer references are
not connected.
3. For Option 1D5 Instruments Only: Remove the BNC-to-BNC jumper that is
connected between the “EXT REF” and the “10 MHz Precision Reference,” as shown in
Figure 3-19.
4. Set the spectrum analyzer measurement parameters as follows:
5. On the network analyzer, press (or
for Option 006).
6. No adjustment is required if the spectrum analyzer measurement is within the
following specifications:
• ± 30 kHz for analyzers without Option 006
• ± 60 kHz for analyzers with Option 006
Otherwise, locate the A12 assembly (red extractors) and adjust the VCXO ADJ (see
Figure 3-18) for a spectrum analyzer center frequency measurement within
specifications.
7. Replace the A12 assembly if you are unable to adjust the frequency as specified. Repeat
this adjustment test.
Figure 3-18 Location of the VCXO ADJ Adjustment
Spectrum Analyzer
Parameter
Network Analyzer without
Option 006
Network Analyzer with
Option 006
Frequency 3 GHz 6 GHz
Span 60 kHz 120 kHz
Amplitude Ref Level 10 dBm 10 dBm
Preset Sweep Setup
CW FREQ
3 G/n 6
G/n