Operating Instructions-2225 Service
OPERATOR'S CHECKS AND ADJUSTMENTS
To verify the operation and basic accuracy of your SOURCE
VERT MODE
instrument before making measurements, perform MODE P-P AUTO
the following checks and adjustment procedures. If SLOPE Positive
(1)
adjustments are required beyond the scope of these COUPI-ING AC
operator's checks and adjustments, refer the instru- LEVEL For a stable display (with
ment to qualified service personnel.
signal applied)
For new equipment checks, before proceeding with
3.
Adjust the INTENSITY and FOCUS controls for
these instructions, refer to Preparation for Use in the desired display brightness and best focused
this manual to prepare the instrument for the initial trace.
start-up before applying power.
4.
Adjust the Vertical and Horizontal POSITION
INITIAL SETUP
controls to position the trace within the graticule
area.
1. Verify that the POWER switch is OFF (switch is
5.
Allow the instrument to warm up for 20 minutes
in the out position), and the Line Voltage before commencing the adjustment proce-
Selector switch is set for the correct source
dures. Reduce the INTENSITY level during the
voltage. Then plug the power cord into the ac
waiting time.
power outlet.
2.
Press in the POWER switch (ON) and set the
instrument controls to obtain a baseline trace:
'TRACE ROTATION ADJUSTMENT
Display
INTENSITY Midrange
FOCUS Best defined display
Vertical (Both Channels)
VERTICAL MODE CH 1
POSITION (both) Midrange
VOLTSIDIV (both) 10 mV
AC-GND-DC (both) DC
VOLTSIDIV Variable CAL (in detent)
(both)
Magification (both)
XI (CAL knobs
in)
Horizontal
SECIDIV 0.5 ms
SECIDIV Variable CAL (in detent)
POSITION Midrange
MODE
XI
Trigger
HOLDOFF MIN (fully counter-
clockwise)
NOTE
Normally, the trace will be parallel to the
center horizontal graticule line, and TRACE
ROTATION adjustment is not required.
1.
Preset the instrument controls and obtain a
baseline trace as described in Initial Setup.
2.
Use the CH
1
POSITION control to move the
baseline trace to the center horizontal graticule
line.
3.
If the baseline trace is not parallel to the center
horizontal graticule line, use a small-bladed
screwdriver or alignment tool to adjust the
TRACE ROTATION control and align the trace
with the graticule line.
PROBE COWIPENSATION
Misadjustment of probe compensation is a source of
measurement error. The attenuator probes are
equipped with a compensation adjustment. To
ensure optimum measurement accuracy, always
check probe compensation before making
Scans
by
ARTEK
MEDL4
==.
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