Tektronix DG2020A, Руководство пользователя

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Appendix B: Performance Verification
BĆ8
DG2020A, P3410, & P3420 User Manual
11. Set the internal clock frequency to 200 MHz, 200 kHz, and 100.0 mHz, and
confirm that the frequencies and periods measured by the frequency counter
fall within the ranges shown in Table B-4.
Table BĆ4: Internal clock frequency precision (PLL off)
Internal clock frequency (Int Frequency) Clock frequency range
200.0 MHz 194 MHz to 206 MHz
200.0 kHz 194 kHz to 206 kHz
100.0 mHz (10.0 s) 97 mHz to 103 mHz (9.709 s to 10.31 s)
This test confirms external clock input operation. Confirm that the clock signal is
output from the CLOCK OUT connector when a square wave signal with a
frequency of 1 MHz and an amplitude of 1 V (V
IH
> 0.7 V, V
IL
< 0.3 V) is input
as an external clock signal.
Required Equipment
Oscilloscope
Function generator
Two SMB-to-BNC cables
Performance check disk
Connections.
Connect the clock output from the DG2020A rear panel to the
oscilloscope CH1 input with an SMB-to-BNC cable. Connect the function
generator output to the DG2020A rear panel clock input with the other
SMB-to-BNC cable.
Function generator
SMBĆtoĆBNC Cable
Clock Input
DG2020A rear panel
Clock Output
SMBĆtoĆBNC Cable
Oscilloscope
Figure BĆ4: External clock input connection
External Clock Input