Typical Characteristics
Specifications
1Ć24
TableĂ1Ć15:ăTypical Characteristics Ċ Triggering System (Cont.)
Name Description
Sensitivities, PulseĆType Trigger Width
and Glitch
6
1.0 division with a minimum slew rate of 25 div/ms at the trigger level
or the threshold crossing. For <5 nsec pulse width or rearm time,
2 divisions are required.
Sensitivities, Derating Aux Channel TrigĆ
ger (TDS 520A & 524A)
All trigger sensitivity specifications are derated by 50% for AUX 1 and
AUX2 inputs.
Sync Width (Option 05 Video Trigger) min. 400 ns for HDTV signals
Sync Duty Cycle
(Option 05 Video Trigger)
min. 50 to 1
Hum Rejection
(Option 05 Video Trigger)
NTSC and PAL: -20 dB without any trigger spec deterioration. TrigĆ
gering will continue down to 0 dB with some performance deterioraĆ
tion.
1 The trigger position errors are typically less than the values given here. These values are for triggering signals having a slew rate
at the trigger point of ±0.5 division/ns.
2 The waveform interval (WI) is the time between the samples in the waveform record. Also, see the footnote for the characteristics
Sample Rate Range and Equivalent Time or Interpolated Waveform Rates in Table 1Ć3 on page 1Ć10.
3 The minimum pulse width and rearm width required for logicĆtype triggering or events delaying to occur.
4 The minimum sensitivity for obtaining a stable trigger. A stable trigger results in a uniform, regular display triggered on the seĆ
lected slope. The trigger point must not switch between opposite slopes on the waveform, and the display must not roll" across
the screen on successive acquisitions. The TRIG'D LED stays constantly lighted when the SEC/DIV setting is 2 ms or faster but
may flash when the SEC/DIV setting is 10 ms or slower.
5 See the characteristic Sensitivity, EdgeĆType Trigger, DC Coupled in Table 1Ć10, which begins on page 1Ć17.
6 The minimum signal levels required for stable logic or pulse triggering of an acquisition or for stable counting of a DCĆcoupled
events delay signal. Also, see the footnote for Sensitivity, EdgeĆType Trigger, DC Coupled in this table. (Stable counting of events
is counting that misses no events.)
TableĂ1Ć16:ăTypical Characteristics Ċ Data Handling
Name Description
Time, DataĆRetention, Nonvolatile
Memory
1,2
Battery life is 5 years
Floppy disk
Standard on TDS 540A, 544A
Option 1F on TDS 520A, 524A
3.5 inch, 720 K or 1.44 Mbyte, DOS 3.3ĆorĆlater compatible
1 The time that reference waveforms, stored setups, and calibration constants are retained when there is no power to the oscilloĆ
scope.
2 Data is maintained by small lithiumĆthionylĆchloride batteries internal to the memory ICs. The amount of lithium is so small in
these ICs that they can typically be safely disposed of with ordinary garbage in a sanitary landfill.
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