Tektronix 475 Technical Manual

TM 11-6625-2735-14-1
SLOPE
LEVEL
A TRIG MODE
EXT 10 (A Trigger circuit
only): External trigger signal
attenuated by a factor of 10.
STARTS AFTER DELAY (B
trigger circuit only): B sweep
starts immediately after the
delay time selected by the
DELAY TIME POSITION dial
and the DELAY TIME switch.
LINE (A trigger circuit
only): Trigger signal obtained
from a sample of the line voltage
applied to the instrument.
Selects the slope of the trigger
signal which starts the sweep.
TRIG Indicator
+: Sweep can be triggered
from the positive-going portion
of the trigger signal.
NORM: With the proper trigger
control settings, A Sweep can
be initiated by signals that are
within the frequency range
selected by the COUPLING
switch. In the absence of an
adequate trigger signal or when
the trigger controls are misad-
justed, there is no trace.
SINGL SWP: After a sweep is
displayed, further sweeps can-
not be presented until the
SINGL SWP pushbutton is
pressed again. The display is
triggered as for NORM opera-
tion using the A Triggering con-
trols.
A light on condition indicates
that A Sweep Generator is
triggered and will produce a
stable display.
–: Sweep can be triggered
A TRIG HOLDOFF
Provides control of holdoff time
from the negative-going portion
of the trigger signal.
Selects the amplitude point on
the trigger signal at which the
sweep is triggered.
Determines the operating mode
for the A Trigger Circuit.
External Trigger
(not labeled)
AUTO: With the proper trigger
control settings, A Sweep can
be initiated by signals that have
repetition rates above about 20
Hertz and are within the fre-
quency range selected by the
between sweeps to obtain
stable displays when triggering
in aperiodic signals (such as
complex digital words).
Variable can increase hold-off
time up to at least 9 times the
setting of the TIME/DIV switch.
In the B ENDS A position (fully
clockwise), the A Sweep is reset
at the end of the B Sweep to
provide the fastest possible
sweep
repetition
rate
for
delayed sweep presentations.
Input
Input connectors for external
trigger signals.
COUPLING switch. In the
absence of an adequate trigger
A and B Sweep
signal or when the trigger con- DELAY TIME
Provides variable sweep delay
trols are misadjusted, the sweep
POSITION
between 0.00 and 10.00 times
free-runs to produce a
the delay time indicated by the
reference trace.
DELAY TIME switch.
2-6

Tektronix 475 Specifications

General

Brand	Tektronix
Model	475
Category	Test Equipment
Language	English