Performance Tests 7
138 Agilent U1602B/U1604B User’s and Service Guide
Bandwidth Verification Test
This test verifies bandwidth of the instrument. In this test, you will use an
oscilloscope calibrator to output a sine wave signal at 1 MHz and
bandwidth frequency (20 MHz and 40 MHz). You will use the peak- to- peak
voltage to verify the bandwidth response of the instrument.
U1602B
Test limits ¡ –3 dB at 20 MHz (for all channels)
U1604B
Test limits ¡ –3 dB at 40 MHz (for all channels)
Refer to Table 7- 1 for the equipment required for this bandwidth
verification test.
1 Connect the calibrator output through a 50
Ω feedthrough termination
to input channel 1 of the instrument.
2 Set up the instrument.
• Set the time base to 500 ns/div.
• Set the Volts/Div for channel 1 to 200 mV/div.
• Select User mode of the instrument, then press F2 softkey for
Acquire mode.
• Press F1 to select Average acquisition mode. Turn the rotary switch
to select averaging number of 8 (Avg 8). Press the rotary switch to
set the setting.
3 Set the calibrator to "Level Sine" and OPR/STBY to "OPR". Set the
calibrator to 1 MHz and six divisions of amplitude.
The oscilloscope calibrator is supplied with 2 or more coaxial cables N (m), BNC (m), 1
meter long and Fluke P/N 686318.
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