Product specifications

22
In many cases, stimulus response characteristic measure-
ments are important. A spectrum analyzer equipped with
a tracking generator forms a stimulus response measure-
ment system that can easily perform scalar component test
with high dynamic range (due to the spectrum analyzer’s
tuned receiver architecture and narrow IF bandwidths).
The Agilent N924xC HSAs each have an optional high-
performance, built-in tracking generator (Option TG7)
(frequency range from 5 MHz to 7 GHz). With this option,
the HSA performs stimulus response measurements.
In this demonstration, we’ll measure the passband and
rejection of a bandpass filter.
Demonstration 13
Tracking generator
Instructions for HSA Keystrokes for HSA
Preset the HSA [Preset]
Turn on the tracking generator
and set its output amplitude to
-10 dBm
[Mode], {Track Generator},
{Amplitude, (On)}, [-10],
{dBm}
Set start frequency and stop
frequency
Note: Select frequencies
appropriate for the device
being tested
[Freq], {Start Freq}, [852.5],
{MHz}, [Stop Freq], [952.5],
{MHz}
Note: Decrease the resolution
bandwidths to increase
dynamic range
To measure the test system’s
frequency response more
accuracy, directly connect
the cable from the tracking
generator output to the
analyzer RF input
The normalization function
is used to eliminate the test
system’s frequency response
error from the measurements.
Store the frequency response
of the test system in trace 4
and make the Normalize On
[Meas], {Normalize}, {Store
Ref 1->4}, {Normalize (On)}
Connect the DUT to the
analyzer
Change the normalized
reference position to optimize
the view range (Figure 25)
{Norm Ref Posn}, [9], {Enter}
Measure the rejection of the
filter 20 MHz above to the
center frequency
[Marker], [902.5], {MHz},
{Mode}, {Delta}, [20], {MHz}
Figure 25. Stimulus response measurements
DUT