Digital Signal Processing Reference
In-Depth Information
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Duration
Trigger on a multichannel pattern whose time duration is less than
a value, greater than a value, greater than a time value with a
timeout value, or inside or outside of a set of time values
Minimum duration setting: 5 ns
Maximum duration setting: 10 s
•
Autoscale
Finds and displays all active analog and digital (for 54621D/
54622D/54641D/54642D) channels, sets edge trigger mode on
highest numbered channel, sets vertical sensitivity on analog
channels and thresholds on digital channels, time base to display
~1.8 periods. Requires minimum voltage >10 mVpp, 0.5% duty
cycle and minimum frequency >50Hz.
D.2.7
Analog Channel Triggering
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Range (internal)
±6 div from center screen
•
Sensitivity*
54621A/D, 54622A/D, 54624A: greater of 0.35 div or 2.5 mV
54641A/D, 54642A/D:
<10mV/div: greater of 1 div or 5mV
=10mV/div: 0.6 div
•
Coupling
AC (~3.5 Hz on 54621A/D, 54622A/D, 54624A. ~10 Hz on 54641A/
D, 54642A/D), DC, noise reject, HF reject and LF reject (~50 kHz)
D.2.8
Digital (D15 - D0) Channel Triggering (54621D, 54622D, 54641D,
and 54642D)
•
Threshold range (used defined)
±8.0 V in 10 mV increments
•
Threshold accuracy
±(100 mV + 3% of threshold setting)
•
Predefined thresholds
TTL = 1.4 V, CMOS = 2.5 V, ECL = -1.3 V
D.2.9
External (EXT) Triggering
•
Input resistance
54621A/D, 54622A/D, 54624A: 1 M, ±3%
54641A/D, 54642A/D: 1 M ±3% or 50.
