Specifications
1-6
TDS1000B and TDS2000B Series Oscilloscope Service Manual
Table 1- 1: Oscilloscope specifications (Cont.)
Trigger
Trigger Level Range, Source Range
typical
CH1, CH2, CH3, CH4 ±8 divisions from center of screen
EXT ±1.6 V
EXT/5 ±8V
AC Line Can not be set
Trigger Level Accura- Accuracies are for signals having rise and fall ti mes ≥ 20 ns
cy, typical
Source
Accuracy
Internal
±0.2 div × volts/div within ±4 divisions from center screen
EXT ±(6% of setting + 40 mV) for signals withi n ±800 mV
EXT/5 ±(6% of setting + 200 mV) for signals withi n ±4V
SET LEVEL TO 50%,
typical
Operates with input signals ≥ 50 Hz
Default Settings,
Video Trigger
Coupling is AC and Auto mode except for a single sequence acquisition
Sensitivity, Video Trig- Composite video signal
ger Type, typical
Source Range
Internal Peak-to-peak amplitude of 2 di visions
EXT 400 mV
EXT/5 2V
Signal Formats and
Field Rates, Video
Trigger Type
Supports NTSC, PAL, and SECAM broadcast systems for any field or any line
Holdoff Range 500 ns to 10 s
Pulse Width trigger
Pulse Width
Trigger modes
Trigger when < (Less than), > (Greater than), = (Equal), or ≠ (Not Equal);
Positive pulse or Negative pulse
Pulse Width
Trigger Point
Equal: The oscilloscope triggers when the trailing edge of the pulse crosses the trigger level.
Not Equal: If the pulse is narrower than the specified w idth, the trigger point is the t railing edge. Otherwise, the
oscilloscope triggers when a pulse continues longer than the time specified as the Pulse Width.
Less than: The trigger point is the trailing edge.
Greater than (also called time-out trigger): The oscilloscope triggers when a pulse continues longer than the
time specified as the Pulse Width.
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