PULL X5 MAG:
When pulled out, increases vertical sensitivity by a
factor of five. Effectively provides two extra sensi-
tivity settings: 2 mV/div and 1 mV/div. In X-Y
mode, increases Y-sensitivity by a factor of five.
17.
CH2 (Y) Input Jack. Vertical input for channel 2.
Y-axis input for X-Y operation.
18. CH2 AC-GND-DC Switch. Three-position lever
switch with the following positions:
AC:
Channel 2 input signal is capacitively coupled; dc
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 de-
flection.
HORIZONTAL CONTROLS
19.
Time Base TIME/DIV Control. Provides step selec-
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
µ
S/div
to 0.5 S/div, in a 1-2-5 sequence.
20.
VARiable Sweep Control. Rotation of control is ver-
nier adjustment for sweep rate. In fully clockwise
(CAL) position, sweep rate is calibrated.
21.
POSition/PULL X10 MAG Control.
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.
22.
X-Y Switch. Used with the VERTical MODE switch
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
23. HOLDOFF/PULL NORM TRIG Control.
HOLDOFF:
Rotation adjusts holdoff time (trigger inhibit period
beyond sweep duration). When control is rotated
fully counterclockwise, the holdoff period is MIN-
inum (normal). The holdoff period increases pro-
gressively with clockwise rotation.
PULL NORM TRIG:
When pushed in, selects AUTOmatic 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
Model 2522B, automatic triggering is applicable to
both the main sweep and delayed sweep.
When pulled out, selects NORMal triggered sweep
operation. A sweep is generated only when an ade-
quate trigger signal is present.
24.
Trigger SOURCE Switch. Selects source of sweep
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
mode, permits each waveform viewed to become its
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-
pling. Four-position lever switch with the following
positions:
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:
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 (50/60 Hz)
becomes trigger.
26.
TRIGger LEVEL/PULL (–) SLOPE Control.
TRIGger LEVEL:
Trigger level adjustment; determines the point on
the triggering waveform where the sweep is trig-
gered. Rotation in the (–) direction (counterclock-
wise) selects more negative triggering point;
rotation in the (+) direction (clockwise) selects
more positive triggering point.
CONTROLS AND INDICATORS
9