Tektronix TDS 420A Service Manual

Warranted Characteristics
1-18
TDS 420A, TDS 430A & TDS 460A Service Manual
Table 1- 12: Warranted Characteristics — Triggering System
Name Description
Accuracy, Trigger Level or Threshold,
DC Coupled
±(2%of|Setting--NetOffset
1
|+0.2div× volts/div setting + 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 420A) or
500 MHz (TDS 430A and TDS 460A) 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 5ns
Auxiliary Trigger Input, External Clock Input Connector: BNC at rear panel
Input Load: equivalent to three TTL gate loads
Input Vol tage (maximum ): --5 VDC to +10 VDC (TTL levels recommended)
Auxiliary Trigger, Maximum Input
Frequency
10 MHz
Duty Cycle High and low levels must be stable for ≥ 50 ns
Frequency, External Clock DC to 10 MHz High and low levels must be stable for ≥ 50 ns
1
Net Offset = Offset - (Position × Volts/Div). Net Offset is the voltage level at the center of the A-D converter dynam ic
range. Offset Accuracy is the accuracy of this voltage l evel.
2
The minimum sensitivity for obtaining a stable trigger. A stable trigger results in a uniform, regular display triggered on
the selected sl ope. 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.
Table 1- 13: Warranted Characteristics — Probe Compensat or Output
Name Description
Output Voltage and Frequency, Characteristic Limits
p
g
q
y
,
Probe Compensator
Voltage 0.5 V (base-top) ±5%intoa1MΩ load
Frequency 1 kHz ±5%
Table 1- 14: Warranted Characteristics — Power Requirements
Name Description
Source Voltage and Frequency
100 to 240 VAC ±10% CAT II, cont inuous range, for 50 Hz/60 Hz
115 VAC ±10% CAT II, continuous range, for 400 Hz
Power Consumption ≤250 Watts

Tektronix TDS 420A Specifications

General

Brand	Tektronix
Model	TDS 420A
Category	Test Equipment
Language	English