3390 50 kHz Arbitrary Waveform / Function Generator Verification and Adjustment Manual Section 1: Verification procedures
3390-905-01Rev. B / May 2016
1-5
Internal timebase verification
This test verifies the output frequency accuracy of the 3390. A single generated frequency provides
all of the output frequencies.
1. Connect a frequency counter as shown below (the frequency counter input should be terminated
at 50
Ω).
Figure 1: Frequency counter connection
2. Set the instrument to the output (found in the table below) and measure the output frequency. Be
sure the instrument output is enabled.
Keithley Instruments 3390
Measurement
Function
Amplitude
Frequency
Nominal
Error*
Sine Wave
1.00 V
pp
10.000,000,0 MHz 10.000 MHz
± 200 Hz
*The error is ±100 Hz within 90 days of calibration, or ±200 Hz within one year.
3. Compare the measured frequency to the test limits shown in the table.
