Agilent Technologies 8753ET User Manual page 73

6. To produce a normalized trace, perform the following steps:
• Press
Display
channels simultaneously.
• Press
Chan 2
• To uncouple the channel stimulus so that the channel power will be uncoupled, press:
Sweep Setup
This will allow you to separately increase the power for channel 2 and channel 1, so that you can
observe the gain compression on channel 2 while channel 1 remains unchanged.
• To display the ratio of channel 2 data to channel 1 data on the channel 2 display, press:
DISPLAY
Chan 2
This produces a trace that represents gain compression only.
7. Press
Marker MARKER 1
8. Press
Scale Ref SCALE/DIV
9. Press .
Power
10. Increase the power until you observe approximately 1 dB of compression on channel 2, using the step
keys or the front panel knob.
11. To locate the worst case point on the trace, press:
Marker Search SEARCH:MIN
Figure 1-49 Gain Compression Using Linear Sweep and
12. If
COUPLED CH OFF
DUAL | QUAD SETUP
Meas Trans:FWD S21 (B/R)
COUPLED CH OFF
MORE D2/D1 to D2 ON
and position the marker at approximately mid-span.
to change the scale to 1 dB per division.
x1
was selected, recouple the channel stimulus by pressing:
and select
DUAL CHANNEL ON
or on ET models:
D2/D1 to D2 ON
Making Measurements
Measuring Amplifiers
to view both
TRANSMISSN
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