Tektronix 491 - Page 120

Fig. 6-35. Test equipment setup to check dynamic range, IF GAIN control range, IF ATTENUATOR dB accuracy RECORDER signal out ampli-
tude and incidental FM.
Type 491
INTENSITY Display of nominal
brightness
FOCUS and ASTIGMATISM
Adjusted for optimum
display definition
INTENSIFIER
OFF
SCALE ILLUM As desired
POSITION (Horizontal and
Adjusted for a horizon
Vertical) tally centered sweep
on the graticule
baseline.
TIME/DIV 10 ms
VARIABLE
CAL
TRIGGER
SLOPE
+
LEVEL
SOURCE
DISPERSION RANGE
DISPERSION-COUPLED
RESOLUTION
IF ATTENUATOR dB
IF CENTER FREQ
VIDEO FILTER
VERTICAL DISPLAY
GAIN
POWER
MIXER PEAKING
FINE RF CENTER FREQ
PHASE LOCK Controls
INT REF FREQ
FREE RUN
INT
kHz/DIV
500 kHz/div
All switches in off position
Midrange (000)
OFF
LIN
Midrange
ON
SEARCH
Centered
OFF
6-32