17.
PULL X5 MAG:
When pulled out, increases vertical sensitivity by a
factor of five. Effectively provides two extra sensitivity
settings: 2 mV/div and 1 mV/div. In X-Y mode, increases
Y-sensitivity by a factor of five.
CH2 (Y) Input Jack.
Vertical input for channel 2.
PULL NORM TRIG:
When pushed in, selects
AUTO
matic triggering
mode. In this mode, the oscilloscope generates
sweep (free runs) in absence of an adequate trigger;
it automatically reverts to triggered sweep operation
when an adequate trigger signal is present. On the
18.
Y-axis input for X-Y operation.
CH2 AC-GND-DC Switch.
Three-position lever
Model 2522C, automatic triggering is applicable to
both the main sweep and delayed sweep.
switch with the following positions:
AC:
Channel 2 input signal is capacitively coupled; dc
24.
When pulled out, selects
NORM
al
triggered sweep
operation. A sweep is generated only when an
adequate trigger signal is present.
Trigger SOURCE Switch.
Selects source of sweep
component is blocked.
GND:
Opens signal path and grounds input to vertical
amplifier. This provides a zero-volt base line, the
position of which can be used as a reference when
performing dc measurements.
DC:
Direct coupling of channel 2 input signal; both ac
and dc components of signal produce vertical deflection.
HORIZONTAL CONTROLS
trigger. Four-position lever switch with the following
positions:
CH1
Causes the channel 1 input signal to become the
sweep trigger, regardless of the
VERTical MODE
switch setting.
CH2:
The channel 2 signal becomes the sweep trigger,
regardless of the
VERTical MODE
switch setting.
ALTernate:
Selects alternate triggering, used in dual-trace
19.
Time Base TIME/DIV Control.
Provides step selec-
mode, permits each waveform viewed to become its
20.
tion of sweep rate for the time base. When the
VARi-
able Sweep
control is set to
CAL,
sweep rate is
calibrated. This control has 21 steps, from 0.1 S/div
to 0.5 S/div, in a 1-2-5 sequence.
VARiable Sweep Control.
Rotation of control is ver-
own trigger source. Must be used with alternate
sweep, cannot be used with chop sweep.
EXT:
Signal from
EXTernal TRIGger
jack becomes
sweep trigger.
25. Trigger COUPLING Switch.
Selects trigger cou-
21.
nier adjustment for sweep rate. In fully clockwise
(CAL)
position, sweep rate is calibrated.
POSition/PULL X10 MAG Control.
pling. Four-position lever switch with the following
positions:
22.
POSition:
Horizontal (X) position control.
PULL X10 MAG:
Selects ten times sweep magnification when pulled
out, normal when pushed in. Increases maximum
sweep rate to 10 nS/div.
X-Y Switch.
Used with the
VERTical MODE
switch
AC:
Trigger signal is capacitively coupled. Used for
most waveforms except video.
TV-V:
Used for triggering from television vertical sync
pulses. Also serves as lo-pass/dc (high frequency
reject) trigger coupling.
TV-H:
and
Trigger SOURCE
switch to select X-Y operating
mode. The channel 1 input becomes the X-axis and the
channel 2 input becomes the Y-axis. Trigger source
and coupling are disabled in this mode.
TRIGGERING CONTROLS
Used for triggering from television horizontal sync
pulses. Also serves as hi-pass (low frequency reject)
trigger coupling.
LINE:
Signal derived from input line voltage (5 0/60 Hz)
becomes trigger.
23. HOLDOFF/PULL NORM TRIG Control.
26. TRIGger LEVEL/PULL (–) SLOPE Control.