Teledyne Lecroy Everywhereyoulook ZS4000, User Manual, Page: 23 / 32

User Manual
21
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
μ V 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 μ V
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.