Tektronix TDS2000C series User Manual

Appendix A: Specifications
Table 5: Trigger Specifications (cont.)
Characteris
tic
Description
A 2 division composite video signal will have a 0.6 division sync tip.
The typical
sensitivities are as follows:
Source Typical Sensitivity
Input Channels 2 divisions of composite video
EXT
400 mV of co
mposite video
Video Trigger Sensitivity,
typical
EXT/5 2 V of composite video
Field rat
es:
50 Hz to 60
Hz
Video Tri
gger Formats
and Field Rates
Line rates:
15 kHz to 20 kHz (NTSC, PAL, SECAM)
Trigger Hold Off Range
500 ns mi
nimum to 10 s maximum
Pulse Width Trigger
Modes
< (Less t
han), > (Greater than), = (Equal), ≠ (Not Equal)
Pulse Width Trigger
Point
Equal: The oscilloscope triggers when the trailing edge of the pulse crosses the trigger level.
Not Equ
al: If the pulse is narrower than the specified width, the trigger point is the trailing edge. Otherwise, the oscilloscope triggers when
a pulse continues longer than the time specified as the Pulse Width.
Less than: T he trigger point is the trailing edge.
Great
er than (also called time-out trigger): The oscilloscope triggers when a pulse continues longer than the time specified as the
Pulse Width.
Pulse Width Range 33 ns ≤ width ≤ 10 sec
Puls
e 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 ≤ 33
0 ns: guardband = ±16.5 ns
All pulses, even from the m ost stable sources, have some amount of jitter. To avoid disqualifying pulses that are intended to qualify but
are not absolutely correct values, we provide an arbitrary guardband. Any measured pulse width within the guardband will qualify. If
loo
king for pulse width differences that are smaller than the guardband width, offsetting the center should allow discriminating differences
down to the guardband accuracy.
No
t 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
Al
l pulses, even from the most stable sources, have some amount of jitter. To avoid disqualifying pulses that are intended to qualify but are
not absolutely correct values, we provide an arbitrary guardband. Any measured pulse width outside the guardband will qualify. If looking
for pulse width differences that are smaller than the guardband width, offsetting the center should allow discriminating differences down to
t
he guardband accuracy. Not equal has slightly better ability to deal with small pulse widths than equal. The accuracy is not better.
T
rigger Frequency Co unter
Frequency Counter
Resolution
6 digits
Frequency Counter
Accuracy (typical)
±51 parts per million including all frequency reference errors and ±1 count errors
Frequency Counter
Frequency Range
AC coupled, 10 Hz minimum to r ated bandwidth
Frequency Counter
Signal Source
Pulse width or edge selected trigger source
Frequency counter measures selected trigger source at all times in pulse width and edge mode, including when oscilloscope acquisition is
halted due to changes in run status, or acquisition of a single shot event has completed.
The frequency counter does not measure pulses that do not qualify as legitimate trigger events.
Pulse Width mode: Counts pulses of sufficient magnitude inside the 250 ms measurement window that qualify as triggerable events (e.g.
all narrow pulses in a PWM pulse train if set to < mode and the limit is set to a relatively small number).
Edge Trigger mode: Counts all pulses of sufficient magnitude.
112 TDS2000C and TDS1000C-EDU Series Oscilloscope User Manual

Tektronix TDS2000C series Specifications

General

Brand	Tektronix
Model	TDS2000C series
Category	Test Equipment
Language	English