Vertical Offset; Bw Limit; Dc Circuit Loading - Tektronix 11A34 User Reference Supplement

Vertical Offset

The 11401 and 11402 oscilloscopes use offset to position the hate on the screen.
in unit provides the X component of an XY display, offset controls horizontal
position.
Offset subtracts a precision voltage from the input signal. To access the offset
function, touch the double-ended arrow at the left edge of the
offset is then assigned to the Lower Control knob.
compresses the displayed signal about c0een center. Therefore, to examine a
potion of the input signal in greater detail, use
(the Upper Control knob) to adjust tha display to the size needed for detailed
examination.

BW Limit

Two four-@ (24 dB/octave) bandwidth limit (low-pass) filters ara available
for each llA.34 channel. The pu'posa
of unwanted noise or lnterferance occurring at frequencies above the frequency of
the signal of interest. The user has a choice of cut-off (-3 dB) frequencies,
either
auxiliary 'rigger, and display signal bandwidths for a channel are always the
same. The auxiliary trigger is the signal sunt to the right plug-in compartment.

DC Circuit Loading

In the llAS2 and llA7l, the coupling capacitor isolates both the input
termination and the amplifier from external dc voltages.
3-2
volts.
20
determines
to screen center, Next, wz the Vert Size
of these
filters is to reduce the amplitude