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5
-
12
PERFORMANCE
TEST
PM 5135
5.
3. 7. 3
Sweep
External Triggered
Test equipment:
-
Function generator
-
Scope
Procedure:
-
Connect
PM 5135
OUTPUT to
50
n
to scope
channel
A
-
Fed TTL
or square
wave
>
1
Vpp to
TRIGGER
INPUT at the
rear of
PM 5135
and
to the
scope channel B
-
Set function generator to 0.5
Hz
-
Set scope to
1
ms time base
Generator settings:
Wave
Frequency
form
range
Frequency
setting
x100
~
x100
rttt1
FREQUENCY I
SWEEP START
start
frequency
200
Hz
SWEEP
TIME
,_._
1s
150s
1
second
SWEEP
D
~
SWEEP STOP
0.1
200
5
kHz
External
Signal
Vpp
fSTOP
Output frequency
fSTART
sweep
time
Output voltage
AC pp
DC
10
v
0
v
10
v
0
v
sweep time
Test result
requirement
see
figure
below
The
negative
going edge starts the sweep.
During
running sweep the
ext
ernal signal is
ig-
nored.
Passing
the sweep time the sweep
remains
at the stop frequency.
The
next negative
going edge ot
the signal
sets the sweep
to the start frequency again. The following negative
going edge starts
the
sweep
anew.
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