Typical Characteristics
TDS 500D, TDS 600C, TDS 700D & TDS 714L Performance Verification and Specifications
2–33
Table 2–18: Typical characteristics — Triggering system
Name Description
Accuracy, Trigger Level or Threshold, DC Trigger source Accuracy
Coupled
(for signals having rise and fall times
≥ 20 ns)
Any Channel
Auxiliary
±((2% × | Setting – Net Offset |)
+ (0.3 div × Volts/div Setting ) + Offset
Accuracy)
Not calibrated or specified
Input, Auxiliary Trigger
The input resistance is ≥1.5 kW; the maximum safe input voltage is
±20 V (DC + peak AC).
Trigger Position Error, Acquisition mode Trigger-position error
1,2
Edge Triggering
Sample, Average
Envelope
±(1 Waveform Interval + 1 ns)
±(2 Waveform Intervals + 1 ns)
Holdoff, Variable, Main Trigger
For all Time/Division ranges, the minimum holdoff is 250 ns and the maximum holdoff is 12
seconds. The minimum resolution is 8 ns for settings ≤ 1.2 ms.
Lowest Frequency for Successful Operation
of “Set Level to 50%” Function
30 Hz
TDS 694C: 50 Hz
Trigger Jitter
TDS 580D, 680C, 684C, 784D, and 794D: s = 7 ps
TDS 520D, 540D, 654C, 694C, 714L, 724D, 754D: s = 8 ps
Provide a pulse with T
rise
≤ 350 ps into one channel. Set the scope to 100 ps/div
(250 GS/s TDS 580D, 680C, 684C, 784D, and 794D; 5 GS/s TDS 654C, 680C, 684C),
with 6 div of signal, and the trigger level set to 50% of the rising edge. Turn on a horizontal
histogram, with the box set to minimum height at the trigger point. Enable StdDev and
Hits in Box histogram measurements. Wait for a least 1000 hits, then note the standard
deviation of the trigger point.
Sensitivity, Edge Trigger, Not DC Coupled
3
Trigger source Typical signal level for stable triggering
AC
Noise Reject
High Frequency Reject
Low Frequency Reject
Same as the DC-coupled limits for frequen-
cies above 60 Hz. Attenuates signals below
60 Hz.
Three times the DC-coupled limits.
One and one-half times the DC-coupled
limits from DC to 30 kHz. Attenuates signals
above 30 kHz.
One and one-half times the DC-coupled
limits for frequencies above 80 kHz.
Attenuates signals below 80 kHz.
Sensitivities, Logic Trigger and Events
Delay, DC Coupled
4
1.0 division, from DC to 500 MHz, at vertical settings > 10 mV/div and ≤ 1 V/div at the
BNC input
Sensitivities, Pulse-Type Runt Trigger
5
1.0 division, from DC to 500 MHz, at vertical settings > 10 mV/div and ≤ 1 V/div at the
BNC input
Sensitivities, Pulse-Type Trigger Width and
Glitch
6
1.0 division, at vertical settings > 10 mV/div and ≤ 1 V/div at the BNC input
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