Specifications
Table 4: Trigger specifications (cont.)
Characteristic Description
Trigger Source Sensitivity
Any input channel
0.40 div from DC to 50 MHz, increasing to
1 div at oscilloscope bandwidth
Aux in (External) 200 mV from DC to 50 MHz, increasing to
500 mV at 250 MHz
Edge-type trigger sensitivity, DC
coupled, typical
Line Fixed
Trigger Coupling Typical Sensitivity
NOISE REJ 2.5 times the DC-coupled limits
HF REJ
1.5 times the D C-coupled limit from DC to
50 kHz. Attenuates signals above 50 kHz
Edge trigger sensitivity, not DC
coupled, typical
LF REJ
1.5 times the DC-coupled limits for
frequencies above 50 kHz. Attenuates
signals below 50 kHz
Source Sensitivity
Any input channel
±8 divisions from center of screen,
±8 divisions from 0 V when vertical LF reject
trigger coupling is s elected
Aux In (External)
±8 V
Line Not applicable
Trigger level ranges
The line trigger level is fixed at about 50% of the line voltage.
This specification applies to logic and pulse thresholds.
Lowest frequency for successful
operation of "Set Level to 50%"
function, typical
45 Hz
For signals having rise and fall times ≥10 ns, the limits are as follows:
Source
Range
Any channel ±0.20 divisions
Aux In (external trigger) ±(10% of setting + 25 mV)
Trigger level accuracy, DC coupled
typical
Line Not applicable
Trigger holdoff range
20 ns minimum to 8 s maximum
The limits for both delayed and main trigger are as follows:
Source Sensitivity
Any input channel
0.6 to 2.5 divisions of video sync tip
Video-type trigger sensitivity, typical
Aux In (External)
Video not supported through Aux In
(External) input
Video-type trigger formats and field
rates
Triggers from negative sync composite video, field 1 or field 2 for interlaced systems, on any
field, specific line, or any line for interlaced or non-interlaced systems. Supported systems
include NTSC, PAL, and SECAM.
8 MSO4000 and DPO4000 Series Specifications and Performance Verification
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