Tektronix DG2020A, Руководство пользователя

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Appendix B: Performance Verification
DG2020A, P3410, & P3420 User Manual
BĆ7
Setup
. Set the frequency counter to frequency measurement mode.
Characteristics Confirmation Procedure
1. Load the TP1CLK.PDA test pattern file from the performance check disk.
When the file is loaded, the DG2020A clock frequency will be set to 200
MHz internally and the PLL circuit will be turned on.
The following two steps check the clock frequency precision with the PLL
circuit on and the internal clock frequency set to 200 MHz
2. Press the START/STOP button on the front panel so that the button’s LED
indicator lights.
3. Set the counter trigger to an appropriate value and confirm that the counter
displays a frequency in the range 199.99 to 200.01 MHz.
The following five steps check the clock frequency precision with the PLL
circuit on and the internal clock frequency set to 200 kHz or 100.0 mHz.
4. Change the frequency counter input to INPUT A through the 50
W
termina-
tion with the SMB-to-BNC cable.
5. Press the following buttons to set the DG2020A clock frequency to 200 kHz.
Menu button Bottom button Popup menu Side button
Front panel
button
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6. Set the counter trigger to an appropriate value, and confirm that the counter
displays a frequency in the range 199.99 to 200.01 kHz.
7. Set the DG2020A clock frequency to 100 mHz.
8. Set the frequency counter to frequency measurement mode.
9. Set the counter trigger to an appropriate value, and confirm that the counter
displays a frequency in the range 99.995 to 100.005 mHz.
The following two steps check the clock frequency precision with the PLL
circuit off and the internal clock frequency set to 200 MHz, 200 kHz and 100.0
mHz.
10. Press the following buttons to turn the PLL circuit off.
Menu button Bottom button Popup menu Side button
Front panel
button
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