Agilent Technologies 4395A - Page 245

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
Conguration
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
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
CONTINUOUS
to
activate
a
gate
trigger
.
2.
Choose
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
TRIGGER:
[
]
.
3.
Choose
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
GATE
[
]
.
4.
Select
the
gate
control mode
. Select
LEVEL or
EDGE by
toggling
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
GATE
CTL:
LEVEL
and
N
NN
NN
NN
NN
NN
N
N
N
EDGE
to the
required mode
.
5. If you have selected the LEVEL trigger mode
, set the trigger polarity for starting the gate
.
Press
NNNNNNNNNN
NNNNNNNNNN
RETURN .And
then toggle
NNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNN
TRIG PLRTY
to
NNNNNNNNNN
NNNNNNNNNNNNN
POS neg
(positive)
or
NNNNNNNNNN
NNNNNNNNNNNNN
pos NEG
(negative).
6.
Choose
NNNN
NNNNNNNNNNNNNNNNNNNNNN
GATE [ ]
NNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNN
GATE DELAY .
7. Set a gate delay time
.
8.
If you have selected the EDGE trigger mode
, choose
NNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNN
GATE LENGTH
. Then set the gate open
length.
You can see the gate trigger status by monitoring the GATE Output terminal using an
oscilloscope. The GATE Output terminal is located on the 4395A's rear panel.
Analyzing the Measurement Results 8-43