Adjustment Procedure—2205 Service
EXTERNAL Z-AXIS AND PROBE ADJUST
Equipment Required (See Table 4-1):
Calibration Generator (Item 1)
50-fi Termination (Item 8)
Two 50-fl Coaxial Cables (Item 6)
10X Probe (Item 12)
Dual-Input Coupler (Item 7)
INITIAL CONTROL SETTINGS
Vertical
CH 1 POSITION Midrange
MODE CH 1, NORM
CH 1 VOLTS/DIV 1 V
CH 1 VOLTS/DIV Variable CAL detent
Channel 1 AC-GND-DC DC
Horizontal
POSITION Midrange
MAG XI
SEC/DIV 20 ms
SEC/DIV Variable CAL detent
Trigger
SLOPE Positive {~r)
LEVEL Midrange
MODE P -P AUTO
SOURCE EXT. EXT=Z
PROCEDURE STEPS
1. Check External Z-Axis Operation
a. Connect a 5-V standard-amplitude signal from
the calibration generator via dual-input coupler to
the CH 1 oft X and EXT INPUT o r Z connectors.
NOTE
The INTENSITY level may need adjustment to
view the Intensity modulation on the dis
played waveform.
b. CHECK—For noticeable intensity modulation.
The positive part of the sine wave should be of lower
intensity than the negative part.
c. Disconnect the test equipment from the
instrument.
2. Check Probe Adjust Operation
a. Set:
CH 1 VOLTS/DIV 10 mV
SEC/DIV 0.5 ms
Trigger SOURCE CH 1
b. Connect the 10X Probe to the CH 1 OR X input
connector and clip the probe tip to the PROBE con
nector on the instrument front panel. If necessary,
adjust the probe compensation for a flat-topped
square-wave display.
c. CHECK—Display amplitude is 4.75 to 5.25
divisions.
d. Disconnect the probe from the instrument.
5-19
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