Agilent Technologies Knowing the Instrument Modes

7-84
Operating Concepts
Knowing the Instrument Modes
Knowing the Instrument Modes
There are three major instrument modes of the analyzer:
• network analyzer mode
• tuned receiver mode
• frequency offset operation (Option 089)
Network Analyzer Mode
This is the standard mode of operation for the analyzer, and is active after you press
or switch on the AC power. This mode uses the analyzer's internal source.
Pressing returns the analyzer
to the "normal" network analyzer operating mode.
Tuned Receiver Mode
In the tuned receiver mode, the analyzer's receiver operates independently of any signal
source. This mode is not phase-locked and functions in all sweep types. The analyzer tunes
the receiver to a synthesized CW input signal at a precisely specified frequency. All phase
lock routines are bypassed, increasing sweep speed significantly. The external source must
be synthesized, and must drive the analyzer's external frequency reference. The analyzer's
internal source frequency is not accurate, and the internal source should not be used in the
tuned receiver mode.
Using the analyzer's tuned receiver mode is useful for automated test applications where
an external synthesized source is available and applications where speed is important.
Although the tuned receiver mode can function in all sweep types, it is typically used in
CW applications.
Typical test setup
1. Activate the tuned receiver mode by pressing
.
2. To perform a CW measurement using the tuned receiver mode, connect the equipment
as shown in Figure 7-46.
Preset
System
INSTRUMENT MODE
NETWORK ANALYZER
System
INSTRUMENT MODE
TUNED RECEIVER