Tektronix 491 - Page 100

Type 491
INTENSITY
FOCUS and ASTIGMATISM
SCALE ILLUM
POSITION (Horizontal
and Vertical)
TIME/DIV
VARIABLE
TRIGGER
SLOPE
LEVEL
SOURCE
DISPERSION RANGE
DISPERSION-COUPLED
RESOLUTION
IF ATTENUATOR dB
IF CENTER FREQ Controls
VIDEO FILTER
VERTICAL DISPLAY
GAIN
POWER
6-12
Display of nominal
brightness
Adjusted for optimum
display definition
As desired
Adjusted for a
horizontally centered
sweep on the grati-
cule baseline
2 mS
CAL
+
FREE RUN
INT
MHz/DIV
5 MHz/div
All switches in off position
Midrange (000)
OFF
LIN
CCW
ON
Fig. 6-9. Test equipment setup for adjusting Vertical Amplifier Gain.
MIXER PEAKING
SEARCH
FINE RF CENTER FREQ
Centered
PHASE LOCK Controls
OFF or EXT REF FREQ
INT REF FREQ
IN
Fig. 6-10. Location of Vertical Amplifier Gain adjustment R672.