Sweep Controls - Tektronix 7B92 Instruction Manual

Operating Information-7B92 Service
®
Sweep Controls
TIME!DIV OR DLV TIME . Selects the basic sweep rate
for Norm al and AL T Sweep operation and se lects the delay
time (to be mult iplied by the DELAV T IM E MULT dial
setting) w hen operating in the INTEN or DL V'D Sweep
mode (see F ig. ' ·3) . Th e VAR IABL E control must be in
the CAL position for the ind icated sweep rate.
DL V'D Time/Division . Selects the 9Neep rate of the
delayed 9Neep generator for o peration in the DL V'D
Sweep, INTEN, and AL T Sweep Display Modes (see
Fig. ' ·3) . The VAR IAB LE control must be in the CAL
position for ind icating the sweep rate .
VARIABLE . Two·position 9Nitch actuated by the
VAR IAB LE control to select calibrated or uncatibrated
sweep rates (see Fig. ' ·3). In the CAL position (pressed in)
t he VAR IAB LE control is inoperative and the sweep rate is
calibrated. When pressed and released, the knob moves out
to activate the VAR IABLE control for uncalibrated sweep
rates. The sweep rate in each Tl ME/ DIV switch position
can be reduced at least to the 9Neep rate of the next slower
position. The VA RI AB LE con trol can be sw itched to
operate with either the delaying or delayed 9Neeps by
means of the internal Variable Selector multi·pin con·
nectar.
Display Modes. Four display modes can be selected by
the follOWing switch settings:
SWP VAR IABLE { CAL IN t
CAl TIME/DIY OR DLY
ALT (OUT I
o
•
,-OUT ·
DL'I'O SW, TRI
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NORMAL Sweep. A Normal Sweep (non·delayed) is
selected when the TI ME / DIV O R Dl V TI ME switch and
the Dl V'D T ime/ Division switch are locked together at
the same sweep rate (see Fig. ' ·3). The Dl V'D Time!
Division switch and the Delayed Triggering l EVE L
control must be pressed in for the Normal Sweep Mode.
Calibrated sweep rates from 0 .2 second/ di vision to 0.5
nanosecond/division can be obtained.
IN TEN. The tNTEN mode , a function of the
delayi ng and delayed 9Neeps is selected when the DL V'D
Time/Division mitch is pulled out and rotated clockwise
(see Fig. ' ·3). In th is mocle, a portion of the delaying
sweep is intensified during the time that the delayed
sweep generator runs.
DL V'O Sweep. The Dl V'D Sweep Display Mode is
selected when the DL V'D Time/ Division switch is pulled
out , ro tated in the INTEN Display Mode for the desired
delayed sweep rate, then pushed in (see Fig. ' ·3). ln this
Display Mode, the delayed 9Neep is displayed, at a rate
determined by the DL V'D Time/ Division 9Nitch, at the
end of each delay period, as selected by the T IME/ DIV
OR Dl V TI M E switch and the DE LA V T IME MUL T
dial settings.
AL T Sweep . When the A L T switch is pressed and
released to the OUT position, sweeps from both the
delaying sweep generator (intensified sweep) and de·
layed SNeep generator (delayed $\Neep) are displayed.
Swilch
$Weep rite
upon i I
NORMAL Sweep, INTEN ,
D ispl ay Modes .
Fig. 1·3 . Composi te Ti me/ Div isio n swit ch .
' ·4
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Out.fOurce-Options
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