Teledyne LeCroy HFP1000 - Manual (Page 33)

Operator’s Manual
922251-00 Rev A 27
5. Set the DMM to read AC volt and set the range to measure 5.0 Vrms.
6. Set the mode of the function generator to sine wave, the frequency to 70 Hz and the output
amplitude to 5 Vrms ±10 mV as measured on the DMM.
7. Record the output voltage to 1 mV resolution as ’Generator Output Voltage’ in the Test
Record. Be careful not to alter the output amplitude after the reading is recorded.
8. Divide the reading recorded in step B-7 by 10 and record the result with 100 μV resolution
as “Expected Output Voltage, top range" in the Test Record.
9. Remove the banana plug adapter, connected to the function generator, from the DMM and
connect the precision 50 Ω terminator to the DMM, making sure that the banana plug side
marked ’GROUND" is connected to the LOW or COMMON input of the DMM.
10. After the DMM reading has stabilized, record the reading to 100 μV resolution as ’Measured
Output Voltage, top range’ in the Test Record.
11. Calculate the error by dividing the measured top range output voltage recorded in step B10
by the expected top range output voltage recorded in step B-8. Subtract 1 from this ratio
and multiply by 100% to get the error in percent.
12. Record the calculated error to two decimal places (±0.xx%) as ’Gain Error, top range’ in the
test record.
13. Verify that the error is less than ±1.0 %.
14. Disconnect the precision 50 Ω terminator from the DMM.
15. Connect the banana plug adapter connected via a BNC cable to the BNC tee at the function
generator to the DMM. Verify that the side of the plug marked ’Ground’ is connected to the
LOW or COMMON input of the DMM.
16. Adjust the sine wave generator output amplitude to approximately 2.5 Vrms as measured
on the DMM.
17. Record the reading to 1 mV resolution as ’Generator Output Voltage, mid range’ in the Test
Record. Be careful not to alter the output amplitude after the reading is recorded.
18. Divide the reading recorded in step B-17 by 10.
19. Record the result to 100 μV resolution as ’Expected Output Voltage, mid range’ in the test
record.