Specifications
TDS1000B and TDS2000B Series Oscilloscope Service Manual
1-7
Table 1- 1: Oscilloscope specifications (Cont.)
Pulse Width trigger
Pulse Width Range Selectablefrom33nsto10s
Pulse Width
Resolution
16.5 ns or 1 part per thousand, whichever is larger
Equal Guardband t > 330 ns: ±5% ≤ guardband < ±(5.1% + 16.5 ns)
t ≤ 330 ns: guardband = ±16.5 ns
Not Equal Guardband t > 330 ns: ±5% ≤ guardband < ±(5.1% + 16.5 ns)
165 ns < t ≤ 330 ns: guardband = --16.5 ns/+33 ns
t ≤ 165 ns: guardband = ±16.5 ns
Trigger frequency counter
Readout Resolution 6 digits
Accuracy (typical) ±51 parts per million including all frequency reference errors and ±1 count errors
Frequency Range AC coupled, 10 Hz minimum to rated bandwidth
Signal Source Pulse Widt h or Edge Trigger modes: all available trigger sources
The Frequency Counter measures trigger source at all times in Pulse Width or Edge modes, including when
the oscilloscope acquisition is halted due to changes in the run status, or acquisition of a single shot event has
completed.
Pulse Width Trigger mode: The oscilloscope counts pulses of significant magnitude inside the 250 ms
measurement window that qualif y as triggerable events, such as narrow pulses in a PWM pulse train if
set to < mode and the width is set to a relatively small time.
Edge Trigger mode: The oscilloscope counts all edges of sufficient magni tude and correct polarity.
Video Trigger mode: The Frequency Counter does not operate.
Measurements
Cursors Amplitude difference between cursors (ΔV, ΔA, ΔVA)
Time difference between cursors (Δt)
Reciprocal of ΔtinHertz(1/Δt)
Automatic Measure-
ments
Frequency, Period, Mean, Pk-Pk, Cycle RMS, Min, Max, Rise Time, Fall Time, Pos Width, Neg Width
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