Leader LBO-516 Instruction Manual - page 10
TRIG'D lamp Indicates when the sweep generator is
being triggered.
HOLDOFF control Allows triggering on certain complex
signals by changing the hold-off (dead)
time of the main (A) sweep. This
avoids triggering on intermediate
trigger points within the repetition
cycle of the desired display. NORM is
a detented position at full CCW
rotation that is used for ordinary
signals.
B ENDS A is a detented position at full
clockwise rotation that increases the A
timebase repetition rate to the
maximum to improve the apparent
brightness of "short" duration (low-
duty cycle) pulses in the delayed mode.
2-1-4 Miscellaneous
Refer to Figure 2-4 for references (43) to (48).
Z AXIS INPUT For applying signal to intensity
Connector modulate the CRT.
FUSE Receptacle permits quick fuse re-
placement without opening case
Power Connector Permits removal or replacement of AC
power cord.
Voltage Label Indicates the voltage of the oscil-
loscope's primary wiring.
Cord Caddy Provides a quick method of securing
the power cord, and supports the
oscilloscope for vertical operation.
Feet Supports the oscilloscope for shelf
mounting.
2-2. INITIAL OPERATION
Before the instrument is operated for the first time, perform the
following procedures in the order listed to ensure satisfaction and
prevent damage to the instrument.
2-2-1 Power Connections and Adjustments
The instrument is normally shipped wired for a 120-volt power
source but can be adapted to operate from power sources with - 10%
of the rated values given in Table 2-1. Operation with a voltage less
that t0% of the rated value may result in improper performance of the
instrument and a voltage more than 10% in excess of the rated value
may damage the power supply circuitry.
To check or alter the power-transformer wiring, proceed as
follows:
1. Disconnect the power cord from the Power Connector (45).
2. Remove the 14 Phillips-head screws around the periphery of the
top and bottom covers.
3. Remove the covers and carefully turn the LBO-516 upside
down.
41
42
46
47
48
43
44
45
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