Time Cursor Accuracy; Horizontal Deflection; Delayed Time Base Deflection Coefficients - Fluke Autoranging CombiScope PM3370B Reference Manual

PERFORMANCE TEST
4.3.26 Time cursor accuracy (continuation of 4.3.25)
This test verifies the accuracy of the time cursors.
Settings/procedure:
1 - Switch the MAIN TB VARiable mode off by pressing both MAIN TB TIME/
DIV keys at a time. The message '1-2-5 STEPS'.
Select 5.00 µs/division for the MAIN TB.
2 -
3 - Switch off the deflection error facility of the time marker generator.
4 - Press the CURSORS menu key.
5 - Select 'on' and time cursors (//) from the CURSORS menu.
Select ∆ T in the READOUT menu.
6 -
Requirements:
- Position one cursor line exactly on the 2nd time marker on the screen and the
other cursor on the 10th time marker. The distance between both cursors is
now 8 time marker intervals. Check for a cursor readout between 39.5 and
40.5 µs.
Press the ANALOG key ('DIGITAL MODE' is displayed briefly) and repeat the
check in this section for the digital mode. Press the TEXT OFF key to have the
full screen width available to display the time markers.
Press the ANALOG key ('ANALOG MODE' is displayed briefly) to return to
analog mode.
4.3.27

Horizontal deflection; DELAYED TIME BASE deflection coefficients

The deflection coefficients of the delayed timebase generator (DEL'D TB) are
verified by means of a calibration signal.
Test equipment:
Fluke 5500A mode: marker (Alternative: time marker generator TG 501).
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