Product Description
TDS 420A, TDS 430A & TDS 460A Service Manual
1-3
Signal Acquisition System
The signal acquisition system provides vertical channels with calibrated vertical
scale factors from 1 mV to 10 V per division. All input channels can be acquired
simultaneously.
You can display, vertically position, and of fset each input channel. You can also
limit their bandwidth (to either 100 MHz or 20 MHz), specify their vertical
coupling, and adjust their fine gain.
Besides the input channels, up to three math waveforms and four reference
waveforms are available for display. (A math waveform results when you specify
operations such as add or invert; a reference waveform results when you save a
live waveform in a reference memory.)
Horizontal System
There are three horizontal display modes: main only, main intensified, and
delayed only. You can select among various horizontal record length settings (see
Table 1--2).
Table 1- 2: Record Length vs. Divisions per Recor d
Record Length
1, 2
Divisions per Record
(50 Points/Division)
120,000 2400 divs
60,000 1200 divs
30,000 600 divs
15,000 300 divs
5,000 100 divs
2,500 50 divs
1,000 20 divs
500 10 divs
1
The 60,000 and 120,000 point record lengths are available
only with Option 1M.
2
If you select the Hi Res acquisition mode, the maximum
Option 1M record length reduces to 60,000 points.
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