Time Measurement Accuracy Test Set-Up - HP 75000 C Series Service Manual

4-1 5. Time
This test uses a precise frequency source to check the accuracy of time
Measurement Accuracy
measurement functions.
Test procedure
1.
Connect the equipment a s shown below. Use an N-to-BNC adapter
and BNC cable to connect the signal generator output to the HP
E1426A channel
1
input.
1
INPUT
1
..
..
0
0
SIGNAL GENERATOR
D
1 1
TYPE N TO BNC COMMAND OSCILLOSCOPE
ADAPTER MODULE MODULE
Figure
4-6. Tlme
Measurement Accuracy Test Set-up
2. Set the Signal Generator controls as follows:
...................................................
Frequency 500 MHz
...................................................
Output
150 mVrms
3. Set the HP E1426A controls as follows:
Reset HP E1426A
...............................................
*RST
Time base to 5 nsec
..............................
T1M:RANG 5E-9
Time base delay to 0 sec
................................
T1M:DEL 0
Turn on channel
1
...................................
VIEW CHANl
Turn off unused channels
.....
BLAN
CHAN2,CHAN3,CHAN4
.......................
Channel
1
to DC a t 50R
CHAN1:COUP DCF
Acquisition type to average
.....................
A C Q m AVER
Acquisition count to 8
.................................
ACQ:COUN 8
Channel
1 range
to 400 mV
.....................
CHAN1:RANG .4
Measure channel 1
.........................
MEAS:SOUR CHANl
Digitize channel 1
.....................................
DIG CHANl
Measure time of 1st positive edge at 0 V
....
MEAS:TVOL? 0,+1?
4. Record the measured time that 1st positive edge occurred a t 0 V.
4-1 8 Verlflcatlon Tests