Agilent Technologies 4395A, Manual Change

Page: 245 / 575

P erforming Time Gated Spectrum Analysis
Step 2: Connecting the Gate Trigger Source .
1. Connect the RF signal source to the R input of the 4395A.
2. Connect the trigger output from the signal source to the EXT TRIGGER connector on the
rear panel of the 4395A.
Figure 8-26. Time Gated Measurement Conguration
Step 3: Setting the Center and Span Frequency .
Set up the center and span frequency of the 4395A to display the target signal.
Step 4: A djusting the Gate Trigger .
1.
Press 4
T rigger
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
CONTINUOUS to activate a gate trigger .
2.
Choose
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TRIGGER: [ ] .
3.
Choose
NNNNNNNNNNNNNNNNNNNNNNNNNN
GATE [ ] .
4.
Select the gate control mode . Select LEVEL or EDGE by toggling
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
GATE CTL: LEVEL and
NNNNNNNNNNNNNN
EDGE to the required mode .
5. If you have selected the LEVEL trigger mode , set the trigger polarity for starting the gate .
Press
NNNNNNNNNNNNNNNNNNNN
RETURN . And then toggle
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TRIG PLRTY to
NNNNNNNNNNNNNNNNNNNNNNN
POS neg (positive) or
NNNNNNNNNNNNNNNNNNNNNNN
pos NEG (negative).
6.
Choose
NNNNNNNNNNNNNNNNNNNNNNNNNN
GATE [ ]
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
GATE DELAY .
7. Set a gate delay time .
8.
If you have selected the EDGE trigger mode , choose
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
GATE LENGTH . Then set the gate open
length.
Y ou can see the gate trigger status by monitoring the GA TE Output terminal using an
oscilloscope . The GA TE Output terminal is located on the 4395A's rear panel.
Analyzing the Measurement Results 8-43