Tektronix 2212 - Display; Display Controls; Internal Graticule

The Display
The 2212 display shows you signals, crt readouts, and/or a menu.
This section explains the various parts and controls of the Display
section of the front panel and how to adjust the Trace Rotation.
Display controls
See Figure 5-1 for location of items 1 through 7.
0 Internal Graticule
The 8x10 cm crt graticule is internally marked on the
faceplate of the crt to eliminates viewing errors between the
trace and the graticule lines. On the center horizontal and
vertical graticule line, each division is divided in five minor
divisions to make accurate measurements.
The vertical deflection factors and horizontal timing are cali-
brated to the graticule for making accurate measurements
directly from the crt.
Take voltage measurements by counting the vertical graticule
divisions and partial divisions occupied by the portion of the
display being measured and then multiplying by the VOL TS/
DIV setting. Rise time amplitude and measurement points (0,
10, 90 and 100%) are indicated at the left side of the
graticule.
Take time measurements using the graticule markings in a
similar manner. Count the number of horizontal graticule
divisions and partial divisions occupied by the portion of the
wavefprm being measured and multiply by the SEC/DIV set-
ting.
To improve the accuracy of the measurement, position the
display to take advantage of the 0.2 division minor graticule
markings on the center graticule lines. Also position one of
the measurement points of the waveform as precisely as pos-
sible on one of the major graticule marks to be used as a
measurement reference point.
2212 User Manual
5-3