Probe Compensation (Option 10X Probe) - Tektronix 2205 Service Manual

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 COMPENSATION
(Option 10X Probe)
Misadjustment of probe compensation is a
source of measurement error.
probes are equipped with a compensation adjust­
ment. To ensure optimum measurement accuracy,
always check probe compensation before making
measurements. Probe compensation is accom­
plished by the following steps:
1. Preset the instrument controls and obtain a
baseline trace as described in the Initial Setup.
2. Connect the two 10X probes (supplied with the
instrument) to the CH 1 OR X and CH 2 OR Y
input connectors.
3. Connect the Channel 1 probe tip to the PROBE
ADJUST terminal.
4. Use the CH 1 POSITION control to vertically
center the display. If necessary, adjust the
Trigger LEVEL control to obtain a stable display
on the positive (~ r) SLOPE.
NOTE
Refer to the Instruction manual supplied
with the probe
information on the probe
compensation.
The attenuator
for more complete
and probe
Operating inform ation—2205 Service
5. Check the waveform display for overshoot and
rounding (see Figure 2 -5 ): if necessary adjust
the probe's compensation.
reactance alignment tool to adjust the LF comp
capacitor for a square front corner on the
waveform.
6. Disconnect the Channel 1 probe tip from the
PROBE ADJUST terminal.
7. Connect the Channel 2 probe tip to the PROBE
ADJUST terminal.
8. Set the Vertical MODE to CH 2.
9. Use the CH 2 POSITION control to vertically
center the display.
10. Repeat step 5 for the Channel 2 probe.
Figure 2-5. Probe compensation.
Use a low-
2-9