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O ERATING INSTRUCTIONS
Front-Panel Controls, ndicators, and Connectors
(See Fig. 2-1.)
The function of each item on the Type 114 front panel is
given in the following tabulation.
POWER
witch
This toggle switch completes the circuit
to the primary of the power transformer.
Indicator
The white lamp to the right of the POWER
switch lights when the Type 114 is en
ergized.
PER OD
witch
This switch selects the basic range of
pulse period. When the switch is set to
EXTERNAL TRIGGER — INPUT,
114 provides width and amplitude control
for externally generated pulses applied to
the INPUT connector. Note that " 100 m "
does not indicate a switch position, but
is instead an index for the VARIABLE
control.
VARIABLE
This control has a range of 10:1 or more,
Control
and provides continuous coverage between
the steps of the PERIOD switch.
EXTERNAL
BNC connector to which the external trig-
TRIGGER-
ger is applied when externally triggering.
INPUT Con
nector
W DTH
witch
This switch selects the basic ranges of
pulse width. Note that the word " 10 m "
does not indicate a switch position, but is
instead an index for the associated VARI
ABLE control.
When the WIDTH switch is set to
WAVE, the output of the Type 114 is a
square wave whose period is selected by
the PERIOD controls.
VARIABLE
This control
Control
age between the steps of the WIDTH
switch and has a range of 10:1 or greater.
WIDTH >
With the flexibility provided, it is possible
PERIOD In-
to set the controls so that the width of the
dicator light pulse selected exceeds the period selected.
When this occurs, the Type 114 counts
down the repetition rate and lights the
WIDTH > PERIOD light. The pulse width
remains as selected, but the pulse period
is no longer that selected by the PERIOD
controls.
SECTION
the Type
QUARE
provides continuous cover-
2
AMPL TUDE
witch
elects the two basic voltage ranges and
the polarity of the output signal.
VARIABLE
Provides for varying the output amplitude
Control
within the range selected by the AMPLI
TUDE switch.
OUTPUT
BNC connector from which the output is
Connector
taken.
TR GGER
witch
This switch permits the operator to select
the edge of the output pulse at which the
trigger pulse occurs.
Connector
BNC connector from which the trigger
pulse output is taken.
First Time Operation
The following procedures are designed to acquaint the
operator with the operation of the Type 114.
1.
et the three VARIABLE controls extreme counterclock
wise.
et the PERIOD switch to 100 µ , the WIDTH switch to
QUARE WAVE, and the AMPLITUDE switch to the " + 1 TO
+3 V" position.
2. Connect the OUTPUT connector of the Type 114 to the
vertical input of an oscilloscope (Tektronix Type 547/1 Al or
equivalent) by means of a 50 ft coaxial cable. Terminate
the coaxial cable at the oscilloscope end with a 50 ft ter
mination (Tektronix Part No. 011-049 or equivalent). Make
sure the input voltage switch is set to match the voltage of
the power source in use (115 or 230 V ac).
tach the power cord.
3. Apply power to the Type 114 and the oscilloscope.
the oscilloscope TIME/DIV or TIME/CM switch to .1 m EC
and obtain a stable display.
4.
et the WIDTH switch to 10 µ . Turn the associated
VARIABLE control clockwise and note the increase in pulse
width. When the control is turned so that the pulse width
exceeds 100 /
. , the WIDTH > PERIOD lamp lights.
j
5. Operate the PERIOD, WIDTH, and AMPLITUDE switches
and controls throughout their ranges and check the results
with the oscilloscope.
Using the Type 114 as a Source of Delayed
Trigger
The use of the Type 114 as a source of delayed trigger
may be demonstrated as follows:
1. Apply a 1 Kpps signal (such as the output of the oscillo
scope calibrator) through a BNC T connector and appro
priate coax cables to the external trigger input connectors of
ee Fig. 2-2. At
et
2-1
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