Fluke PM3082 Service Manual page 449

PERFORMANCE TEST
settings/procedure:
1 - Apply a 0.5 ms time marker signal to input CH1.
2 - Press the AUTOSET key.
3 - Use a 500 termination. For instruments with switchable 500 input impedance it is
recommended to make use of this feature. Put CH1 in 0.2V/div.
4 - Select in the TRIGGER MTB menu level-pp 'off and 'dc' trigger coupling.
5 - Press the TB MODE menu key: select in the belonging menu 'trig' mode.
6 - Adjust LEVEL MTB for a correctly triggered display.
7 - Set the trace height to about 4 divisions.
8 - Press menukey DTB and select in the belonging menu DEL'D TB 'on' and MAIN TB 'on'.
9 - Set MTB to 1 ms and DTB to 0.5 ms.
10 - Set the delay time to about 0 sec. using the DELAY control.
11 - Adjust the vertical position of the MTB display with the CH1 POS control in the top half of the
viewing area.
12 - Adjust the vertical position of the DTB display with the TRACE SEPARATION keys (or the
TRACK control).
13 - Verify the DTB deflection coefficients with 10x MAGN off and 10x MAGN on (MGN in display)
according to the requirements in the tables. Make use of the deflection error readout of the time
marker generator.
Note: - Error limits must be measured between the 2nd and the 10th graticule line (there are 11
graticule lines). These are the central 8 divisions.
- With 10x MA GN on (MGN), the central 10 divisions of the expanded 100 divisions of DTB
are measured.
- Only the time base positions are checked that are essential for instrument accuracy.
- DTB TIME/DIV is electrically coupled with MTB TIME/DIV; to check the settings in the
table only the key pair MTB TIME/DIV VAR must be pressed.
Requirements analog mode 10x MAGN off:
DTB setting
0.5 ms
20 ps
5 ps
1 ps
0.5 ps
0.1 ps
50 ns
20 ns
Requirements analog mode 10x MAGN on (MGN):
DTB setting
0.1 ps
10 ns
5 ns
2 ns
MTB setting
0.5 ms
20 ps
5 ps
1 ps
0.5 ps
0.1 ps
50 ns
20 ns
MTB setting
0.1 ps
10 ns
5 ns
2 ns
Marker pulse
0.5 ms
20 ps
5 ps
1 ps
0.5 ps
0.1 ps
50 ns
20 ns
Marker pulse
0.1 ps
10 ns
5 ns
2 ns
6 - 2 3
Max. error
1.8%
1.8%
1.8%
1.8%
1.8%
1.8%
1.8%
1.8% (PM3092/94)
Max. error
2.3%
2.3%
3.3%
3.3% (PM3092/94)