Trigger Sensitivity Test Set-Up - HP 75000 C Series Service Manual

4-16. Trigger
This test checks channel and external triggers for sensitivity a t rated
Sensitivity Test
bandwidth.
procedure
1 .
Connect the equipment as shown below. Use an N-to-BNC adapter
and BNC cable to connect the signal generator output to the HP
E1426A channel
1
input.
INPUT
1
n
/
SIGNAL GENERATOR
TYPE N TO BNC COMMAND OSCILLOSCOPE
ADAPTER
MODULE MODULE
Figure
4-7.
Trigger Sensitivity Test Set-up
2. Set the Signal Generator controls as follows:
Frequency
................................................................
100
MHz
..........................................................................
Output 100 m v
3. Set the HP E1426A controls a s follows:
Reset HP E1426A
.............................................................
*RST
Time base
to
20 nsec
...................................
T1M:RANG 20E-9
..............................................
Turn on channel
1
VIEW CHANl
Turn off unused channels
....
BLAN
CHANB,CHANS,CHANI
Channel 1 to DC a t 50R
.............................
CHAN1:COUP DCF
Channel
1
range to 1.6 V
.............................
CHAN1:RANG 1.6
Channel
1
offset to 0 V
....................................
CHAN1:OFFS 0
...........................
Acquisition type to average ACQ:TYP AVER
Acquisition count to 16
......................................
ACQ:COUN 16
Trigger source to channel 1
....................
TR1G:SOUR CHANl
Trigger level to 0 V
..............................................
TRIGLEV 0
Start HP E1426A running
................................................
RUN
4.
On the HP E1426A front panel, verify TRIGGERED LED is ON.
5. Set the Signal Generator controls as follows:
..................................................................
Frequency 500 MHz
..................................................................
Output 250 mV n n s
February 9, 1991 Verification Tests 4-21