Fluke 9500B User Handbook Manual page 285

10.6.3 Calibrating the Edge Function
10.6.3.1 Summary
The Edge Function is calibrated by applying risetime corrections in the
sequences given in paras 10.6.3.4 through 10.6.3.9.
Equipment requirements are given in para 10.6.6.2; para 10.6.6.3
describes the Calibration Setup.
10.6.3.2 Equipment Requirements
• The UUT Active Head, connected to a verified Model 9500B
Mainframe.
High-bandwidth sampling oscilloscope with bandwidth ≥6GHz for
•
Risetime measurements. (≥20GHz for 9550 and 9560)
Example: Tektronix Model TDS820 or HP 54750.
• 50Ω SMA - SMA co-axial 'Trigger' cable for trigger inputs to the
high-bandwidth oscilloscope.
• High-bandwidth coaxial attenuator may be required if 9500B edge
output voltage exceeds oscilloscope input capability.
Example: HP8493 Copt20 26.5GHz 3.5mm 20dB attenuator.
• 50Ω SMA - BNC adaptor
Example: Suhner 33 SMA-BNC-50-1
10.6.3.3 Calibration Setup
1. Connections Ensure that the 9500B is connected to the
Oscilloscope as shown in Fig. 10.6.3.1, and
that both instruments are powered on and
warmed up.
2. Oscilloscope Select the required function to measure edge
response.
Caution: The 9500B Edge function output is
capable of generating voltages that may cause
damage to sampling oscilloscope inputs with
limited input voltage capability. Use of an
attenuator is typically required for outputs above
1V pk-pk.
Section 10: Calibrating the Model 9500B:
High Bandwidth Oscilloscope
Trigger Y-Channel
Input Input
C H 1
C H 2
C H 3
Trigger Cable:
Wavetek Part No.
C H 4
630477 (supplied)
C H 5
230V PK MAX
Fig 10.6.3.1 Edge Function Calibration -
Interconnections
Edge Function
Active Head
9510/9520/9530 9510 or 9520
9500
10.6-7