Fluke 5500A, Service Manual

Page: 179 / 296

SC600 Option
Verification
6
6-53
5. Multiply the rms reading by the conversion factor listed to convert it to the peak-to-
peak value. Compare result to the tolerance column.
6-68. Verification at 50
Ω
Set the Calibrator Mainframe impedance to 50
Ω
(The blue softkey under SCOPE Z
toggles the impedance between 50
Ω
and 1 M
Ω
).
1. Connect the BNC cable to the Calibrator Mainframe’s SCOPE connector. Connect
the other end of the BNC cable to the 50
Ω
feedthrough termination then to the
5790A INPUT 2 using the BNC(f) to Double Banana adapter.
2. Set the 5790A to AUTORANGE, digital filter mode to FAST, restart fine, and Hi
Res on.
3. Program the Calibrator Mainframe to output the wave type and voltage listed in
Table 6-42.
4. Allow the 5790A reading to stabilize, then record the 5790A rms reading for each
wave type and voltage in Table 6-42.
5. Multiply the rms reading by the conversion factor listed to convert it to the peak-to-
peak value.
Multiply the peak-to-peak value by (0.5 * (50 + Rload) / Rload), where Rload = the
actual feedthrough termination resistance, to correct for the resistance error. Compare
result to the tolerance column.