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TAS 455 and TAS 465 Service Manual
1Ć3
The vertical system provides two vertical channels with calibrated vertical
scale factors from 2 mV to 5 V per division.
Both channels can be displayed, vertically positioned, bandwidth limited (to
either Full or 20 MHz), inverted, and vertical coupling specified.
Besides the two channels, a math waveform is available for display. (A math
waveform results when you add the two channels.)
There are three horizontal display modes: main, delayed, and XY.
The main display is the standard horizontal display mode with calibrated
sec/div scales.
The delayed display can be delayed by time with respect to the main trigger.
The delayed display can also be set to display at the first valid trigger after
the delay. The delayed display also has a calibrated sec/div scale.
XY mode is useful to measure the phase difference of two signals.
The triggering system comprises a complete set of features for triggering the
horizontal system. You can configure trigger for source, slope, coupling,
mode, and holdoff. Video triggers are available for triggering on video sigĆ
nals.
You can adjust the trigger level or automatically set it to 50% of the trigger
signal with the press of a button.
Once you have set up to take your measurements, the cursors can help you
take those measurements quickly.
The TAS 455 and TAS 465 Oscilloscopes have two types of cursors for
taking measurements on the displayed waveforms: delta (difference) and
absolute. The General Purpose Knob controls the placement of the cursors.
The TOGGLE button selects which cursor is active.
Delta voltage measures the voltage between the horizontal bar cursors.
Delta time measures the time between vertical bar cursors. These are delta
measurements; that is, measurements based on the difference between two
cursors.
Absolute voltage measures the voltage position of a single horizontal bar
cursor. The displayed voltage level readout is made with respect to the
ground reference level of the channel.
Vertical System
Horizontal System
Trigger System
Measurement
Cursors