Tektronix 410, Service Manual

Page: 41 / 275

Warranted Characteristics
TDS 410, TDS 420 & TDS 460 Technical Reference
1Ć15
Table 1-10: Warranted Characteristics — Time Base System (Cont.)
Name Description
Accuracy, Delta Time
Measurement
1, 2
For single-shot acquisitions using sample or high-resolution acquisi-
tion modes and a bandwidth limit setting of 100 MHz:
1 WI + 150 ppm of |Reading| + 650 ps)
For repetitive acquisitions using average acquisition mode with
≥
8 av-
erages and a bandwidth limit setting of FULL:
1 WI + 150 ppm of |Reading| + 300 ps)
1
For input signals
≥
5 divisions in amplitude and a slew rate of
≥
2.0 divisions/ns at the delta time measurement points. Signal
must have been acquired at a volts/division setting
≥
5 mV/division and not in Events mode.
2
The WI (waveform interval) is the time between the samples in the waveform record. Also, see the footnotes for Sample Rate
Range and Equivalent Time or Interpolated Waveform Rates in Table 1-3 on page 1-8.
Table 1-11: Warranted Characteristics — Triggering System
Name Description
Accuracy, Trigger Level or Thresh-
old, DC Coupled Offset
1
| + 0.2 div volts/div s Offset
Accuracy) for any channel as trigger source and for signals having
rise and fall times
≥
20 ns.
Sensitivity, Edge-Type Trigger, DC
Coupled
2
0.35 division from DC to 50 MHz, increasing to 1 division at 350 MHz
(TDS 410 and TDS 420) or 500 MHz (TDS 460) for any channel as
trigger source
Sensitivity, Video-Type, TV Field and
TV Line
2
0.6 division of video sync signal
Pulse Width, minimum, Events-Delay 5 ns
Auxiliary Trigger Input Connector: BNC at rear panel
Input Load: equivalent to three TTL gate loads
Input Voltage (maximum): –5 VDC to +10 VDC
Auxiliary Trigger, Maximum Input
Frequency 10 MHz
Duty Cycle High and low levels must be stable for
≥
50 ns
1
Net Offset = Offset – (Position x Volts/Div). Net Offset is the voltage level at the center of the A-D converter dynamic range. Offset
Accuracy is the accuracy of this voltage level.
2
The minimum sensitivity for obtaining a stable trigger. A stable trigger results in a uniform, regular display triggered on the selected
slope. The trigger point must not switch between opposite slopes on the waveform, and the display must not “roll” across the screen
on successive acquisitions. The TRIG’D LED stays constantly lighted when the SEC/DIV setting is 2 ms or faster but may flash when
the SEC/DIV setting is 10 ms or slower.