Leveled Sine Wave Frequency Verification - Fluke 5500A Service Manual

6-58. Leveled Sine Wave Frequency Verification

This procedure uses the following equipment:
•
PM 6680 Frequency Counter with a prescaler for the Channel C input
(Option PM 9621, PM 9624, or PM 9625) and ovenized timebase (Option PM 9690
or PM 9691)
•
BNC(f) to Type N(m) adapter
•
BNC cable supplied with the SC600
Refer to Figure 6-6 for the proper setup connections. Set the Calibrator Mainframe to
SCOPE mode, with the Levsine menu on the display. Then follow these steps to verify
the leveled sine wave amplitude.
1. Set the PM 6680's FUNCTION to measure frequency with auto trigger,
measurement time set to 1 second or longer, and 50Ω impedance.
2. Using the BNC cable, connect the SCOPE connector on the Calibrator Mainframe to
the PM 6680 at the channel indicated in Table 6-30. You will need the BNC-N
adapter for the connection to Channel C.
3. Set the filter on the PM 6680 as indicated in the table.
4. Program the Calibrator Mainframe to output as listed in Table 6-30. Press O on
the Calibrator Mainframe to activate the output.
5. Allow the PM 6680 reading to stabilize, then record the PM 6680 reading for each
frequency listed in Table 6-30.
Table 6-30. Leveled Sine Wave Frequency Verification
Calibrator Mainframe
Frequency
(output @ 5.5 V p-p)
50 kHz
500 kHz
5 MHz
50 MHz
500 MHz
PM 6680 Settings
Channel Filter
A On
A Off
A Off
A Off
C Off
PM 6680 Reading
(Frequency)
0.125 Hz
1.25 Hz
12.5 Hz
125 Hz
1250 Hz
SC600 Option
Verification
Tolerance
6
6-41