Tektronix 1780-R - page 103

Operating Instructions

1780R-Series Operator’s Manual 3–51

3. <READOUT INTENSITY> will be circled, and a test readout

will be displayed. Use the large knob to adjust intensity. (The

front-panel INTENSITY control adjusts signal intensity only.

Readout intensity must be adjusted through the Calibration

menu.)

4. Touch <TRACE ROTATION> to obtain a test axis, then use the

large knob to adjust trace rotation.

5. Touch <CAL OSC> until <ON> is outlined. While the cal

oscillator is on, the V axis switcher is enabled and 75% bars are

selected (with setup for NTSC).

a. Touch <GAIN CAL>. The large knob will now adjust

vectorscope gain. Use the large knob to make the circle

match the compass rose.

b. Exit Calibrate menu.

Perform Step 6 for 1780R (NTSC ) only.

6. Apply a 75% color bar signal with no setup to a 1780R input

channel and select that channel for display.

a. Push the front-panel CONFIGURE button to enter the

Configure menu. Touch the <PAGE> area of the screen

until <2> is outlined.

b. Touch <SETUP> until <NO> is outlined.

c. Touch <BARS> until <75%> is outlined.

d. Push the front-panel PHASE button to assign the large

knob function to phase shift. Adjust the large knob to

properly align the burst and vectors on the graticule.

e. Push the front-panel CALIBRATE button to enter the

Calibration menu, then push the button under the left

CRT.

f. Touch <GAIN CAL>. The large knob will now adjust

vectorscope gain. Use the large knob to set the color bar

vectors to fall on the boxes.

g. Exit Calibrate menu.