Tektronix 434, Инструкция по эксплуатации

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Calibration—434
TR IG G ER C IR C U IT A D JU S T M E N T
E quipm ent Required
1. M e d i u m -F re q u e n c y C o n sta n t-A m p litu d e Signal
4. BNC T C onnector
Generator
5. 42-Inch 50 f t BNC Cable (tw o required)
2. Low -Frequency Signal G enerator
6. 3-Inch Screw driver
3. 50 f t BNC T e rm in a tio n
C ontrol Settings
Preset the in stru m e n t c o n tro ls to the settings given
under P relim inary C o n tro l Settings except as fo llo w s :
Sweep M ODE A U T O
T IM E /D 1 V 50
ms
IN T E N S IT Y Visible Display
28. A d ju st Trigger Level Centering
a. C o n n ect the o u tp u t of the M edium -Frequency
C o n s ta n t-A m p litu d e Signal G enerator to the CH 1 in p u t
connector via a GR to BNC adapter, a 42-inch 50 f t BNC
cable, and a 50 f t BNC te rm in a tio n .
b. A d ju s t the o u tp u t o f the signal generator fo r a 0.3-
divisio n display o f the 50 k ilo h e rtz reference frequency.
c. V e rtic a lly center the display around the center
F ig . 5 -1 0 . L o c a tio n o f T rig g e r Le vel C e n te rin g a d ju s tm e n t,
graticule line.
d . C H E C K - W ith the T R IG G E R L E V E L co n tro l
centered, should have a stable display in the + and — posi­
tio n s o f th e TR IGGER SLOPE sw itch.
e. A D J U S T —Trigger Level C entering adjustm ent R629
(see Fig, 5-10) fo r a stable display in both the + and —
positions o f the T R IG G E R SLOPE sw itch.
29. A d ju st CH 1 and COMP Trigger DC Level
a. Set the T R IG G E R C O U P LIN G to DC and the
TR IGGER SLOPE sw itch to +.
b. C H E C K —C R T fo r a stable display.
c. A D J U S T —C om p Trigger DC Level adjustm ent R274
(see Fig. 5-11) fo r a stable display.
5-21
F ig . 5 -1 1 . L o c a tio n o f trig g e r D C level a d ju s tm e n ts .