Tektronix 1A5 Instruction Manual page 26

Operating Instructions — Type 1A5
Fig. 2-13. Recommended component sequence when using the P6034 or P6035 probe.
Procedure:
a. Insert the plug-in unit into the oscilloscope. Turn on
the oscilloscope and allow 20 minutes for warm-up.
b. Set the front-panel controls as follows:
Type 544
Amplitude Calibrator
Horizontal Position
Horizontal Display
Time/CM
Triggering Mode
Triggering Slope
Triggering Coupling
Triggering Source
Type
STEP ATTEN BAL
VOLTS/CM
POSITION
DISPLAY
AC-GND-DC (A Input)
AC-GND-DC (B Input)
c. Attach the BNC-binding post adapter to the oscillo ­
scope Cal Out connector.
2-18
1 V
Centered
Normal ( ×1 )
.5 ms
Auto
+
AC
Norm
1A5
Adjust as outlined in
Front Panel Adjustments
20 mV
Centered
A-B
GND
GND
d. Connect the compensation box of the P6023 probe to
the Type 1A5 A INPUT connector.
to the binding post attached to th e Cal Out connector.
e. Check that the oscilloscope Intensity control is set for
normal brightness. Position the trace to graticule center with
the Type 1A5 POSITION control.
f. Switch the A Input AC-GND-DC control to DC. Adjust
the osc i l loscope Triggering Level and Type 1A5 POSITION
control to provide a centered, triggered display.
g. Check that the Type 1A5 VARIABLE control is at CAL
position.
h. Adjust the probe DC ATTEN CALIBR
exactly 5 cm vertical display amplitude, as measured be ­
tween the trailing edges of the s
2-14 (A).
i. Adjust the probe AC COMP FINE ADJUST (and AC
COARSE COMP if neces sa
s q uareness at the bottom left corner of the square wave.
See F i g. 2-14 (B).
j. Switch t he osc i lloscope Ampli
The probe is now properly adjusted.
to be used for making CMRR measurements, a second probe
must be adjusted to match the first. The rem
explains an effective method for performing the adjustment.
k. Connect the compens a tion box of the second probe to
the B INPUT connector; connect the probe tip to the junction
of the binding post and the first probe tip
See Table 2-3.
Connect the probe tip
ATIO N to obtain
q uare waves. See Fig.
ry) for op ti mum flatness and
t ude C a librator to Off.
If two probes are
a ining procedure
.