Fluke 123B/S Service Manual - Page 94

Continue at READY, Table 5-1. HF Gain Calibration Points Fast, Cal step, 5500A Setting

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123/124 Service Manual 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 5-1. 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 5-1. 8. Set the 5500A to source a 1 kHz square wave (Output SCOPE, MODE wavegen, WAVE square), to the first calibration point in Table 5-2. 9. Press to select the first step in Table 5-2. 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 5-2. 13. When you are finished, set the 5500A to Standby. 14. Continue at Section 5.6.2. Table 5-1. HF Gain Calibration Points Fast Cal step 5500A Setting 1) (1 kHz, no 50Ω!) Test Tool Input Signal Requirements 1) (1 kHz, trise

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123/124
Service Manual
5-8
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 5-1.
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 5-1.
8.
Set the 5500A to source a 1 kHz square wave (Output SCOPE, MODE wavegen,
WAVE square), to the first calibration point in Table 5-2.
9.
Press
to select the first step in Table 5-2.
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 5-2.
13.
When you are finished, set the 5500A to Standby.
14.
Continue at Section 5.6.2.
Table 5-1. 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.