Tektronix 475 Technical Manual

TM 11-6625-2735-14-1
d. CHECK—That a stable triggered display can be
obtained in CH 1 and CH 2 positions of A TRIGGER
SOURCE with adjustment of A TRIGGER LEVEL.
e. Return A TRIGGER SOURCE to NORM and move
test signal cable from CH 2 input to A TRIGGER external
input.
f. Set the sine-wave generator for a 1 division,
40 megahertz display, then set A TRIGGER SOURCE to
EXT.
g. CHECK—That a stable triggered display can be
obtained in AC and DC positions of A TRIGGER
COUPLING with adjustment of A TRIGGER LEVEL
h. Return A TRIGGER SOURCE to NORM and A
TRIGGER COUPLING to AC.
i.
15.
It
Disconnect all test equipment.
Check A 200 Megahertz Triggering
NOTE
may be necessary to change to a sine-wave
generator with a 200 megahertz output.
a. Connect the sine-wave generator output cable
through a GR-to-BNC female adapter to the through
signal input of the 50-ohm signal pickoff. Connect the
through signal output of the signal pickoff to a GR-to-BNC
male adapter, to a 10X BNC attenuator, to a 50-ohm BNC
termination, to a BNC elbow, to A TRIGGER external
input.
b. Connect the 10% signal output of the signal pickoff
to an 18-inch 50-ohm BNC cable, to a 50-ohm termination,
to CH 1 input.
c. Set the sine-wave generator for a 1.5 division,
200 megahertz display.
d. Set TIME/DIV to 0.01 and press X10 MAG to on.
e. CHECK—That a stable triggered display, with no
more than 0.2 division of jitter, can be obtained in AC, LF
REJ and DC positions of A TRIGGER COUPLING with
adjustment of A TRIGGER LEVEL.
f. Set TIME/DIV to 0.1 ms and set A TRIGGER
SOURCE to EXT.
g. Set the sine-wave generator for a 5 division display
of reference frequency (250 millivolts at external input),
then set to 200 megahertz.
NOTE
If generator has no reference frequency setting, set
for 5 megahertz.
h. Set TIME/DIV to 0.01
i. CHECK—That a stable triggered display, with no
more than 0.2 division of jitter, can be obtained in AC and
DC positions of A TRIGGER COUPLING with adjustment
of A TRIGGER LEVEL.
j. Replace the 10X BNC attenuator in test signal setup
with a 5X BNC attenuator (500 millivolts at external input)
and set A TRIGGER COUPLING to LF REJ.
k. CHECK—That a stable triggered display, with no
more than 0.2 division of jitter, can be obtained with
adjustment of A TRIGGER LEVEL.
16. Check B 200 Megahertz Triggering
a. Move test signal setup from A TRIGGER external
input to B TRIGGER external input.
b. Set A TRIGGER SOURCE to NORM, set A
TRIGGER COUPLING to AC, set HORIZ DISPLAY to B
DLY’D, set B TRIGGER SOURCE to EXT and set B
TRIGGER COUPLING to LF REJ.
c. CHECK—That a stable triggered display, with no
more than 0.2 division of jitter, can be obtained with
adjustment of A and B TRIGGER LEVEL controls.
d. Replace the 5X BNC attenuator with a 10X BNC
attenuator (250 millivolts at external input).
e. CHECK—That a stable triggered display, with no
more than 0.2 division of jitter, can be obtained in AC and
DC positions of B TRIGGER COUPLING with adjustment
of A and B TRIGGER LEVEL controls.
5-13

Tektronix 475 Specifications

General

Brand	Tektronix
Model	475
Category	Test Equipment
Language	English