Input B Frequency Measurement Accuracy Test - Fluke 123 Service Manual

Fluke 123/124/125
Service Manual
5. Observe the Input A main reading on the test tool and check to see if it is within the
6. Continue through the test points.
7. When you are finished, set the 5500A to Standby.
Duty Cycle and Pulse Width measurements are based on the same principles as
Frequency measurements. Therefore the Duty Cycle and Pulse Width
measurement function will not be verified separately.

3.5.5 Input B Frequency Measurement Accuracy Test

Proceed as follows to test the Input B frequency measurement accuracy:
1. Connect the test tool to the 5500A as shown in Figure 3-4.
2. Select the following test tool setup:
3-10
range shown under the appropriate column.
Table 3-1. Input A,B Frequency Measurement Accuracy Test
5500A output, 600 mVpp
1 MHz
10 MHz
40 MHz
60 MHz (Fluke 124/125 only)
Figure 3-4. Test Tool Input B to 5500A Scope Output 50Ω
•
Press select auto ranging (
•
open
Press to the INPUT B MEASUREMENTS menu, and choose:
INPUT B: ON | MEASURE on B:
•
Fluke 123/124: press
Input A, B Reading
0.993 to 1.007 MHz
09.88 to 10.12 MHz
38.98 to 41.02 MHz
58.48 to 61.52 MHz
Note
AUTO
in top of display).
Hz
/ to open the SCOPE INPUTS menu.
ST8005.WMF