Tektronix TDS 420A, Руководство по обслуживанию, Страница: 29 / 288

TDS 420A, TDS 430A & TDS 460A Service Manual
1- 7
Nominal Traits
Nominal traits are described using simple statements of fact such as “Four, all
identical” for the trait “Input Channels, Number of,” rather than in terms of
limits that are performance requirements.
Table 1- 3: Nominal Traits — Signal Acquisition System
Name Description
Bandwidth Selections 20 MHz, 100 MHz, and FULL (TDS 420A: 200 MHz, TDS 430A and
TDS 460A: 400 MHz)
Digitizers, Number of TDS 430A: Two, both identical
TDS 420A and TDS 460A: Four, all identical
Digitized Bits, Number of 8 bits
1
Digitized Resolution, Hi Res Mode Clock, Internal:
Clock, External:
Resolution
HiRes
≅
8
≤
Ꮑ
8
+
0.5 Log
2
Ꮛ
time div
500
⋅
10
–9
Ꮠ
Ꮖ
≤
15 bits
Resolution
HiRes
≅
8
≤
Ꮑ
8
+
0.5 Log
2
Ꮛ
100, 000, 000
ClockExternalMenu
Ꮠ
Ꮖ
≤
11.8 bits
Bandwidth, Hi Res Mode Clock, Internal:
Clock, External:
For 1 s div and slower, BW
HiRes
≅
0.44
⋅
Ꮛ
50
time div
Ꮠ
Hz
BW
HiRes
≅
44
⋅
Ꮛ
ClockExternalMenu
100
Ꮠ
Hz
Input Channels, Number of TDS 430A: Two, both identical, called CH 1 and CH 2
TDS 420A and TDS 460A: Four, all identical, called CH 1 through CH 4
Input Coupling DC, AC, or GND
2
Input Resistance Selections
1 M
Ω
or 50
Ω
Ranges, Offset, All Channels Volts/Div Setting Offset Range g , ,
1 mV/div to 99.5 mV/div
±
1 V
100 mV/div to 995 mV/div
±
10 V
1 V/div to 10 V/div
±
100 V
Range, Position
±
5 divisions
Range, Sensitivity
3
1 mV/div to 10 V/div