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

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
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I
I
I
I
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I
I
I
I
8081A
IlJU
OUTPUT~ ~
__
~
I
I
I
I
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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
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