Tektronix T921 User Manual

Use the following procedure to measure
risetime :
1 . Adjust the
VOLTS/DIV and VAR controls for a
display
amplitude of exactly 5 divisions .
2 . Adjust the vertical POSITION control so that the
display bottom just touches the 0% graticule line and
the
display top just touches the 100% graticule
line (see Fig . 2-
16) .
3 . Measure the horizontal distance (divisions)
between the 10% and 90% points on the waveform (point A
to point B, Fig . 2-16) .
4 . Use the following formula to find risetime :
Examples :
horizontal
Risetime = distance

x
(divisions)
The horizontal distance between the 10% and 90% point
on the waveform is 5 divisions with a SEC/DIV switch
setting of 1 /is .
Substituting the given values :
Risetime = 5 divisions x 1 /is/division
Risetime =
5,us
loo
1 .
SIGNAL
AMPLITUD
ASURE
E FROM
TO B
HORIZONTAL
DISTANCE
465/DM-0-13
Fig . 2-16 . Risetime .
SEC/DIV
setting
Introduction
Operating Instructions-T921/T922/T922R
The Tektronix
T922R
Oscilloscope
is designed to
mount in a standard 19-inch rack . When mounted in
accordance with the following mounting procedure, the
instrument will meet all electrical and environmental
characteristics given in Section 1 of this manual .
Instrument Dimensions
A dimensional
drawing showing the major dimensions
of the T922R is
shown in Fig . 1-2 in Section 1 of this
manual
.
Rack Dimensions
T922R RACKMOUNTING
Height . A least 5.25 inches of
vertical space is required
to mount this instrument in a rack .
Width . When used with the optional
slide-out tracks,
the minimum width of the openingbetween
the left and
right front rails of the rack
mustbe 17 5/8 inches . This
allows room oneach
side
of
the instrument for the slide-
out tracks
to
operate freely, permitting the instrument to
move smoothly in and out of the rack .
Depth . Total depth necessary to mount the
T922R in
a
cabinet rack is 18 inches .
This allows room for air
circulation, power cord clearance and the necessary
mounting hardware . (Additional room may beneeded if
access
to rear
panel connections is required .)
Slide-Out Tracks
The optional slide-out
tracks permit the T922R to be
extended out of the rack for maintenance or calibration
without removing
the instrumentfrom the rack . To operate
the T922R in the extended
position, be sure the power
cord and any interconnecting
cables are long enough for
this purpose .
The slide-out tracks
consist of two assemblies-one for
the left side
of
the
instrument and one for the right side .
Illustrations at the
end of this section show the complete
slide-out track assemblies
.
The
stationary section of each
assembly attaches to the front and rear rails
of the rack,
and the chassissection is attached to the instrument
.
The
intermediate section slides between the stationary
and
chassis sections and allowsthe T922R
to
be
extended out
of the rack . The stationary and intermediate sections
of
the
tracks are packaged as matched sets andshould not
be separated .
To
identify
the left or right assembly, note
the position of the automatic latch . When mounted in
the
rack, the automatic latch should be at the top of both
assemblies
.
2- 1 7
.
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Tektronix T921 Specifications

General

Brand	Tektronix
Model	T921
Category	Test Equipment
Language	English