Performance Tests
7
Agilent U1602A/U1604A User’s and Service Guide
165
Horizontal
Δ
t and 1/
Δ
t Accuracy Verification Test
This test verifies the horizontal
Δ
t and 1/
Δ
t accuracy. In this test, you
will use the oscilloscope to measure the output of a time mark generator.
Test limits: ±3% reading ±0.4% screen
Refer to Table 7- 1 for the equipment required for this horizontal
Δ
t and
1/
Δ
t accuracy verification test.
1
Connect the calibrator to the instrument’s channel 1 using a 50
Ω
feedthrough termination.
2
Set up the signal source.
•
Select Marker on the calibrator
•
Set the calibrator for 100
m
s markers.
•
Set the spike shape on the calibrator.
3
Set up the oscilloscope.
•
Press the Autoscale key.
•
Set the time base to 20
m
s/div.
•
Select Scope mode and press F3 to access Delay menu.
•
Set the Time Reference to Left at F2.
•
Adjust the trigger level to obtain a stable display.
4
Select Measure mode, then press F1 to enable auto measurement
selection for Measure 1. Turn rotary switch to select Frequency
measurement from the list of auto measurements. Set Measure 2 for
Period measurement. Measure the following:
•
Frequency of 10 kHz — Test limits are 9.63 kHz to 10.40 kHz.
•
Period of 100
m
s — Test limits are 96.20
m
s to 103.8
m
s.
5
Change the calibrator to 1
µ
s markers and time base to 250 ns/div.
Adjust the trigger level to obtain a stable display.
6
Measure the following:
•
Frequency of 1 MHz — Test limits are 962 kHz to 1.04 MHz.
•
Period of 1
m
s — Test limits are 0.96
m
s to 1.04
m
s.
