PERFORMANCE TEST
4 - 29
-
Only the timebase positions essential for instrument accuracy are checked.
Press the ANALOG key (’DIGITAL MODE’ is displayed briefly) to perform the
tests for the digital mode. Press the TEXT OFF key for full visibility of the time
marker pulses in the central 8 divisions.
Press the ANALOG key (’ANALOG MODE’is displayed briefly) to return to
analog mode.
5
equirements for analog mode MAGNIFY off (
*
1):
MAIN TB setting
Marker pulse
Max. error
20.0 ns (PM3390B/94B)
20 ns
1.8%
100 ns
0.1
µ
s
1.8%
500 ns
0.5
µ
s
1.8%
1.00
µ
s
1
µ
s
1.8%
5.00
µ
s
5
µ
s
1.8%
20.0
µ
s
20
µ
s
1.8%
500
µ
s
0.5 ms
1.8%
1.00 ms
1 ms
1.8%
10.0 ms
10 ms
1.8%
Requirements for analog mode MAGNIFY on (
*
10):
MAIN TB setting
Marker pulse
Max. error
2.00 ns (PM3390B/94B)
2 ns
3.3%
5.00 ns
5 ns
3.3%
10.0 ns
10 ns
2.3%
100 ns
0.1
µ
s
2.3%
Requirements for digital mode:
MAIN TB settingMarker pulseMax. error
2.00 ns (PM3390B/94B)
2 ns
1.8%
5.00 ns
5 ns
1.8%
250 ns
0.5
µ
s
1.3%
500 ns
0.5
µ
s
1.3%
20.0 ms
20 ms
1.3%
1.00 s
1 s
1.3%
Check for an undistorted display of the time marker pulses. Timing accuracy
should not show a noticeable error. In the MAIN TB setting 250 ns/division, the
interval between successive time marker pulses should be 2 div.‘