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Manual Function Test; Manual Function Test Setup - HP 8081A Operating And Service Manual

300mhz rate generator module
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Oscilloscope:
4-11
MANUAL FUNCTION TEST
\
Sensitivity (both cha nnels)
1VIdiv
Trigger
external
SPECI FI CATION
Timebase, main
20~s/div
All external functions can be triggered manually by
pressing a pushbutton.
Oscillator:
o
00
500HM
HRMINATJON
SOBOA MAINfRAME
SOS1A
REAL TIME
ascI
LLOSCO~E:
Frequency
10KHz
Amplitude
1VRMs
Display oscillator output and 8081 A output on
screen.
2.
3.
Check that during the positive slope of the oscilla-
tor output a pulse burst appears.
Figure 4-5. Manual Function Test Setup
EQUIPMENT
Threshold level
OSCILLATOR
OUTPUT
I
I
I
I
I
I
~
r--Delay of 1/2 period
8081A
i,hnnnn rl -
OUTPUT
-----.lJ
U U U U U
~
OV
Real Time Oscilloscope
HP 182C Mainframe
with 1804A and 1821 A plug-ins
PROCEDURE
1.
Set up the equipment as shown in figure 4-5 and
set the controls as follows:
8081 A:
4.
Turn EXT INPUT LEVEL control from positive to
negative and observe the waveforms.
RATE range
100KHz-10KHz
Rate VERNIER
, .. ,
CCW
Operating Mode switch
GATE EXT
EXT INPUT LEVEL
-
NEG-POS-MAN switch
,
MAN
Oscilloscope:
OSCILLATOR I
I
OUTPUT
-+ __
I_
I
I
I
I
I
I
I
I
I
I
I
I
I
I
8081A
IlJU
OUTPUT~
~
__
~
I
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I
I
11nJllUlJlJt:
2.
Sensitivity
,
1V/div
Trigger, ,
,
internal
Timebase, main
,
10IlS/div
Press MAN pushbutton. As long as the Man button
is pressed a pulse train should be visible
~MAN
button--..J
I
pressed
I
_llll~11Ill·I.lml-UIJ/JINI.ll-
OV
Threshold level
--+
+1 V
-1V
Note that the last pulse will be cut off as soon as
the gate closes.
3.
Set the Operati ng Mode switch to T RIG. Press the
MAN pushbutton. As long as the MAN button is
pressed the output should be OV.
5.
Set the NEG-POS-MAN switch to NEG and repeat
steps 3 and 4 observing the pulses. The 8081 A
output should be gated on the negative half-cycles
of the oscillator output.
r-
MAN
button~
pressed
I

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