Fluke ScopeMeter 123, Service Manual, Page: 70 / 96

Fluke 123/124/125
Service Manual
4-8
3. Set the 5500A to source a 1 kHz fast rising edge square wave (Output SCOPE,
MODE edge) to the first calibration point in Table 4-1.
4. Set the 5500A in operate (OPR).
5. Press to start the calibration.
6. Wait until the display shows calibration status
READY
.
7. Press to select the next calibration step, set the 5500A to the next calibration
point, and start the calibration. Continue through all calibration points in Table 4-1.
8. Set the 5500A to source a 1 kHz square wave (Output SCOPE, MODE wavegen,
WAVE square), to the first calibration point in Table 4-2.
9. Press to select the first step in Table 4-2.
10. Press to start the calibration.
11. Wait until the display shows calibration status
READY
.
12. Press to select the next calibration step, set the 5500A to the next calibration
point, and start the calibration. Continue through all calibration points Table 4-2.
13. When you are finished, set the 5500A to Standby.
14. Continue at Section 4.6.2.
Table 4-1. HF Gain Calibration Points Fast
Cal step 5500A Setting
1)
(1 kHz, no 50
Ω
!)
Test Tool Input Signal
Requirements
1)
(1 kHz, t
rise
<100 ns,
flatness after rising edge:
<0.5% after 200 ns)
HFG & FI AB (CL 0600) 10 mV 20 mV
HFG & FI AB (CL 0601) 25 mV 50 mV
HFG & FI AB (CL 0602) 50 mV 100 mV
HFG & FI AB (CL 0603) 100 mV 200 mV
HFG & FI AB (CL 0604) 250 mV 500 mV
HFG & FI AB (CL 0605) 500 mV 1V
HFG & FI AB (CL 0606) 1V 2V
HFG & FI AB (CL 0607)
[HFG & FI A (CL 0608), HFG & FI B (CL 0628)]
2)
2.5V 5V
1)
As the 5500A output is not terminated with 50
Ω
, its output voltage is two times its set voltage
2)
After starting the first step in this table cell, these steps are done automatically.