External Zaxis And Probe Adjust

Equipment Required (see Table 4-1):

Leveled Sine-Wave Generator (Item 2)

BNC T-Connector (Item 8)

Two 50-i2 BNC Cables (Item 4)

P6120 Probe (provided with instrument)

INITIAL CONTROL SETTINGS

PROCEDURE STEPS

POWER

ON

1. Check EXT Z-AXIS Operation

AUTO INTENSITY AUTO FOCUS

As desired

Best defined display

a. Connect the leveled sine-wave generator output via a T-connector and two 50-i2 cables to the EXT Z-AXIS INPUT connector on the rear panel and to the CH 1 OR X input connector.

b. Adjust the generator controls to produce a 5-volt, 50 kHz display.

Vertical

Channel 1 POSITION VERTICAL MODE CH 1 VOLTS/DIV CH 1 VOLTS/DIV Variable

Channel 1 AC-GND-DC

Midrange CH 1 2 V

CAL detent DC

c. CHECK—For noticeable intensity modulation. The positive part of the sine wave should be of lower intensity than the negative part.

d. Disconnect the test setup.

2. Check PROBE ADJUST Operation a. Set:

Horizontal

POSITION

HORIZONTAL MODE SEC/DIV SEC/DIV Variable

CAL detent

CH 1 VOLTS/DIV 10 mV SEC/DIV 0.5 ms b. Connect the P6120 Probe to the CH 1 OR X input connector and insert the probe tip into the PROBE ADJUST jack on the instrument front panel. If necessary, adjust the probe compensation for a flat-topped square-wave display.

VAR HOLDOFF TRIGGER MODE TRIGGER SLOPE TRIGGER LEVEL INT

Midrange VERT MODE INT

c. CHECK—Display is 5 divisions ±1 division (4 to 6 divisions).

d. Disconnect the test setup.

5-20

rev nov 1981

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