Tektronix 543B, Instruction Manual

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Operating Instructions — Type 543B/RM543B
SCALE ILLUM Varies illumination of the graticule grid
lines.
Beam Position Four neon lamps with accompanying
arrows indicate the direction when the
display is deflected out of the viewing
area.
TRIGGER INPUT Connector for applying an external trigger
signal to the time base when TRIGGER
SLOPE switch is set to the EXT position.
+ GATE OUT Supplies approximately a 20-volt square­
wave pulse when the time base is oper-
a'ing. Pulse duration is approximately
10. 5X the setting of the TIME/CM switch.
NORMAL SWEEP
Power Connections
Unless otherwise indicated, the Type 543B is shipped
with rhe power transformer and fan wired for 115-volt ac
input. A connection diagram on the side of the trans­
former and Fig. 2-1 shows alternative connections for other
input voltages to the power transformer. When the trans­
former is changed from a 108, 115, or 122 volts to 216, 230,
or 244 volts connection, the fan wiring must be changed.
Fig. 2-2 shows the fan connections for each voltage range.
SAWTOOTH OUTSupplies the sawtooth voltage of the time
base. Peak amplitude is about —130 volts.
EXTERNAL
HORIZ INPUT Jack for applying external horizontal sig­
nal when the 'HORIZONTAL DISPLAY
switch is set to EXT.
VERT SIG OUT
CRT CATHODE
SELECTOR
(rear panel)
EXTERNAL CRT
CATHODE
Vertical signal output connector. Output
amplitude is approximately 1.2 volts/cm
of deflection.
Provides blanking of between-channe!
switching transients (in the CHOPPED
BLANKING position) when using multi­
channel plug-in units in the chopped mode.
With the ground strap disconnected, this
connector applies Z-axis modulation sig­
nals to the crt cathode. The Z-axis signa's
should be at leas’ 20 volts in amplitude
to cause intensity modulation.
Always have the ground strap connected
except when applying Z-axis modulating
signals.
Fig. 2-2. Fan connections for 100-124 volts and 220-248 volts.
See the label on the side of T601 for the placement of jumper leads.
Fig. 2-1. Transformer connections for 108 to 244 volt, 50 Io 60 cps
and 400 cps operation.
Sweep Triggering
Proper sweep triggering is essentia' for a stable presenta­
tion of an input signal. For a stable display, the sweep must
be triggered at the same time relative to the displayed
signal. Thus, the sweep must be triggered by the input
signal or by some external signal that has a fixed time
relationship with the displayed signal. The external trigger
signal must be the same frequency or a multiple of the
input signal.
Selecting the Trigger Source
The TRIGGER SLOPE switch selects one of a variety of
possible triggering signcis. For most applications, The sweep
can be triggered internally from the clisp ayed signal. This
occurs with the TRIGGER-SLOPE switch set at or
- INT.
The LINE positions of the TRIGGER SLOPE switch connect
a line-frequency signal to the triggering input. Line trigger­
ing is useful whenever the input signal is frequency-related
to the line frequency.
To trigger the time base from an external signal, set the
TRIGGER SLOPE switch to an EXT position and connect the
2-2