Fluke 125B/S Calibration Guide - Page 44

Position, Input A and B, Pulse Adjust Input B

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123B/124B/125B Calibration Manual 7. Connect the calibrator Scope Output to both CH A and CH B without the 50 Ω terminator. 8. Set up the Calibrator: a. Supply a 1 kHz square wave (Output SCOPE, Mode VOLT). b. Set the Calibration step in Table 14. c. Push . 9. On the Test Tool: a. Push  to select the first Calibration Step in Table 14. b. Push  to start the calibration. c. Wait until READY shows as the calibration status on the display. d. Push  to select the next calibration step. 10. Repeat steps 8 through 9 for each Calibration Step in Table 14. 11. Put the Calibrator in Standby. 12. Continue to the next section. Table 14. HF Gain Calibration Points Slow Calibration Step LF-Gain- (CL 0330) 25 V LF-Gain (CL 0335) 50 V [1] After starting the first step in this table cell, other steps are done automatically. Calibrator Setting [1] (1 kHz, Scope Mode EDGE) Position, Input A and B To do the position calibration: 1. Push  to select calibration step, Position (CL 0400):IDLE. 2. Disconnect all connections to the Test Tool inputs. 3. Push  to start the calibration. The Position (CL0400) to (CL0414) calibrates. 4. Wait until Position (CL 0414):READY shows on the display. 5. Continue to the next section. Pulse Adjust Input B To do the Pulse Adjust Input A calibration: 1. Push  to select calibration step Volt Zero (CL 0420):IDLE. 2. Connect 50 Ω Terminators to the A and B inputs (BB120 and TRM50). 3. Push  to start the calibration. 4. Wait until Volt Zero (CL 0434):READY shows on the display. 5. Continue to the next section. 36

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123B/124B/125B
Calibration Manual
36
7.
Connect the calibrator Scope Output to both CH A and CH B without the 50
Ω
terminator.
8.
Set up the Calibrator:
a.
Supply a 1 kHz square wave (Output SCOPE, Mode VOLT).
b.
Set the Calibration step in Table 14.
c.
Push
.
9.
On the Test Tool:
a.
Push
to select the first Calibration Step in Table 14.
b.
Push
to start the calibration.
c.
Wait until
READY
shows as the calibration status on the display.
d.
Push
to select the next calibration step.
10.
Repeat steps 8 through 9 for each Calibration Step in Table 14.
11.
Put the Calibrator in Standby.
12.
Continue to the next section.
Position, Input A and B
To do the position calibration:
1.
Push
to select calibration step,
Position (CL 0400):IDLE
.
2.
Disconnect all connections to the Test Tool inputs.
3.
Push
to start the calibration.
The Position (CL0400) to (CL0414) calibrates.
4.
Wait until
Position (CL 0414):READY
shows on the display.
5.
Continue to the next section.
Pulse Adjust Input B
To do the Pulse Adjust Input A calibration:
1.
Push
to select calibration step
Volt Zero (CL 0420):IDLE
.
2.
Connect 50
Ω
Terminators to the A and B inputs (BB120 and TRM50).
3.
Push
to start the calibration.
4.
Wait until
Volt Zero (CL 0434):READY
shows on the display.
5.
Continue to the next section.
Table 14. HF Gain Calibration Points Slow
Calibration Step
Calibrator Setting
[1]
(1 kHz, Scope Mode EDGE)
LF-Gain- (CL 0330)
25 V
LF-Gain (CL 0335)
50 V
[1]
After starting the first step in this table cell, other steps are done automatically.