Low Frequency Verification; High Frequency Verification - Fluke 5520A Service Manual

6-130. Low Frequency Verification

This procedure provides an example of testing low frequency flatness using a 5.5 V
output. Follow the same procedure for testing other amplitudes, only compare results
against the flatness specification listed in Table 6-55.
1. Program the Calibrator Mainframe for an output of 5.5 V @ 500 kHz. Press
the Calibrator Mainframe to activate the output.
2. Allow the 5790A reading to stabilize. The 5790A should display approximately 1.94
V rms. Enter the 5790A reading in Column A of Table 6-55.
3. Enter 50 kHz into the Calibrator Mainframe. Allow the 5790A reading to stabilize,
then enter the 5790A reading in Column B of Table 6-55.
4. Enter the next frequency listed in Table 6-55. Allow the 5790A reading to stabilize,
then enter the reading into Column A of the table.
5. Enter 50 kHz into the Calibrator Mainframe. Allow the 5790A reading to stabilize,
then enter the 5790A reading in Column B of Table 6-55.
6. Repeat steps 4 and 5 for all of frequencies listed in Table 6-55. Continue until you
have completed Columns A and B.
7. When you have completed Columns A and B, press
Mainframe's output. Complete Table 6-55 by performing the calculations for
column C. Compare Column C to the specifications listed in the final column.
Table 6-55. Low Frequency Flatness Verification at 5.5 V
Calibrator
Mainframe A
Frequency
500 kHz
1 MHz
2 MHz
5 MHz
10 MHz
Complete Columns A-C as follows:
A Enter 5790A Reading (mV) for the present frequency.
B Enter 5790A Reading (mV) for 50 kHz.
C Compute and enter the Calibrator Mainframe Flatness Deviation (%): 100 * ((Column A entry)-
(Column B entry))/ (Column B entry)

6-131. High Frequency Verification

This procedure provides an example of testing high frequency flatness using a 5.5 V
output. Follow the same procedure for testing other amplitudes, only compare results
against the flatness specification listed in Table 6-56. For this voltage range, you will use
the model HP 8482A power sensor.
1. Program the Calibrator Mainframe for an output of 5.5 V @ 30 MHz. Press
the Calibrator Mainframe to activate the output.
2. Allow the power meter reading to stabilize. The power meter should display
approximately 75 mW. Enter the power meter's reading in Column A of Table 6-56.
B C
50 kHz
SC300 Option
Verification
to remove the Calibrator
Calibrator Mainframe
Flatness Specification (%)
1.50 + 100 V
1.50 + 100 V
1.50 + 100 V
1.50 + 100 V
1.50 + 100 V
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