Tektronix 410, Service Manual

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Product Description
TDS 410, TDS 420 & TDS 460 Technical Reference Manual
1Ć3
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.)
There are three horizontal display modes: main only, main intensified, and
delayed only. You can select among various horizontal record length settings
(see Table 1-1).
Table 1-1: Record Length vs. Divisions per Record
Record Length
1, 2
Divisions per Record
(50 Points/Division)
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 30,000 and 60,000 point record lengths are available only with Option 1M.
2
The maximum record length of 60,000 points for oscilloscopes equipped with Option 1M
reduces to 15,000 points when operating in Hi Res or Average acquisition mode.
Both the delayed only display and the intensified zone on the main intensified
display can be delayed by time with respect to the main trigger. Both can be
set to display immediately after the delay (delayed runs after main mode); the
delayed display can also be set to display at the first valid trigger after the
delay (delayed triggerable mode).
The delayed display (or the intensified zone) can also be delayed by a se-
lected number of events. In such a case, the events source is the delayed
trigger source. For any events signal, the delayed-trigger system conditions
the signal by determining the source, coupling, etc., of that signal.
At time base settings of 20 ms per division or slower the records are dis-
played using Roll mode. Both untriggered roll and triggered roll modes are
available.
Horizontal System