424 Trace Align

4-25. Trace-aligning coil L302 is located around the CRT near its screen. Adjustment of Trace Align R350A/B varies the magnitude and direction of current through the coil, which has the effect of rotating the trace. In this way the trace is brought into alignment with the CRT graticule.

Table 5-1. Equipment Required for Tests and Adjustments

Recommended Instrument

Model

Required For

Ref Para

Required Characteristics

1. Voltmeter Calibrator

($ 738AR

Calibrator check; High Voltage Adjustment; Calibrator Adjustment

5-17

Outputs of lv and lOv p-p; -300v DC; ±0.2%

2. DC Voltmeter

<$ 412A

Low-Voltage Adjustments

5-11

-100 to +100 volts, ±1%

3. DC VTVM

<$ 410B

High-Voltage Adjustment

5-13

May be adapted for high voltage (-2.5 kv) measurement. Provision for altering calibration.

4. Voltage Divider

<$ 11044A

High-Voltage Adjustment

5-13

Provide 100:1 division for vtvm (item 3); 2.5 kv rating.

5. Audio Oscillator

($> 200CD

Geometry Adjustment

5-16

400 kc output.

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