Performance Tests 7
140 Agilent U1602B/U1604B User’s and Service Guide
Horizontal Δt and 1/Δt Accuracy Verification Test
This test verifies the horizontal Δt and 1/ Δt 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 Δt and
1/ Δt 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
ms markers.
• Set the spike shape on the calibrator.
3 Set up the oscilloscope.
• Press the Autoscale key.
• Set the time base to 20
ms/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
ms — Test limits are 96.20 ms to 103.8 ms.
5 Change the calibrator to 1
µs 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
ms — Test limits are 0.96 ms to 1.04 ms.
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