Horizontal System; Horizontal System; Check/Adjust Horizontal Gain; Check/Adjust Horizontal Magnifier Registration - Tektronix 221 Instruction Manual

Calibration—221 Service
Equipment Required
1. BNC to dual banana plug adapter
2. Probe tip to BNC adapter
Control Settings
Preset the controls as given in the Preliminary Control
Settings.

23. Check/Adjust Horizontal Gain

a. Preset the controls as given in the Preliminary Control
Settings.
b. Set the SEC/DIV switch to the 1 volt position.
c. Connect the standard amplitude calibrator to the
HORIZ INPUT. Use a BNC cable w ith a dual banana plug
adapter (GND plug to COMMON).
d. Set the standard amplitude calibrator amplitude for a
5 volt signal.
e. Check for a five-division display.
Fig. 5-8. Location of Horizontal Gain and Magnifier Registration
adjustments.
5-12
H O R IZO N TA L SYSTEM
3. Three inch screwdriver
4. Time mark generator
5. Standard amplitude calibrator
f. Adjust Horizontal
five-division display. See Fig. 5-8.
g. Disconnect all the test equipment.

24. Check/Adjust Horizontal Magnifier Registration

a. Position the spot to the center of the crt graticule.
b. Set the HORIZ-MAG switch to the 10X position.
c. Check that the spot remains w ithin one division of
graticule center.
d. Adjust the Mag Regis adjustment R433 fo r less than
one division shift from the IX to the 10X position. See
Fig. 5-8.

25. Check Horizontal Bandwidth

a. Set the SEC/DIV switch to 1 V.
b. Set INPUT COUPLING to GND.
c. Connect the constant amplitude signal generator to
the HORIZ INPUT jack. Use a dual banana plug to BNC
adapter (GND adapter to COMMON), a 50-ohm cable and a
GR to BNC adapter
d. Set the constant amplitude signal generator to
50-kHz reference. Adjust the output of the constant
amplitude signal generator for six divisions of horizontal
display.
REV. APR 1974
Gain adjustment R505 for a
®1