Frequency Offset In-Depth Description - HP 8753E User Manual

SYNTHESIZED
SIGNAL GENERATOR
Figure 6-60. Typical 'l&t Setup for a Frequency Offset Measurement

Frequency Offset In-Depth Description

The source and receiver operate at two different frequencies in frequency offset operation.
The difference between the source and receiver frequencies is the Lo frequency that you
specify.
The two user-defined variables in frequency offset are the receiver frequency, and the offset
receiver frequency IF + Lo or IF - Lo.
The Receiver Frequency. You can choose a CW value or start and stop values for the receiver
frequency. The stimulus values, which appear on the analyzer display, will affect only the
receiver.
The ORset Frequency (L0). This frequency value is the difference between the source and
receiver frequencies.
The analyzer's source locks to the receiver f the Lo frequency, regardless of
Note
the offset value you selected.
is not known precisely. As the Lo frequency changes, the source tracks it to
maintain the receiver start/stop or CW frequency that you requested.
Frequency Hierarchy. The source frequency can be greater than or less than the Lo
frequency. That is, the analyzer can measure either the lower or upper of the two IF mixing
products when it is in the frequency offset mode.
Frequency Ranges. Receiver frequency range: 300 kHz to 3 GHz (or 6 GHz with Option 006)
Compatible Instrument Modes and Sweep Types. Frequency offset is compatible with all
sweep types in the network analyzer mode.
6 dB
ATTENUATOR
MIXER
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Application and Operation Concepts