TM 11-6625-2925-10/TO 33A1-10-242-1
Apparent = TIME/DIV OR DLY TIME setting
MagnificationDLY'D Time/Division setting
Substituting the given values:
Apparent =200 nanoseconds = 10
Magnification20 nanoseconds
Triggered Delayed Sweep Magnification
The delayed sweep magnification method just described, may
produce too much jitter at high apparent magnification. The
Delayed Sweep Triggerable mode provides a more stable
display, since the delayed sweep display is triggered at the
same point each time.
1. Set up the display as given in steps 1 through 7 in the
Delayed Sweep Magnification procedure.
2. Rotate the Delayed Triggering LEVEL control
counterclockwise out of the RUNS AFTER DELAY TIME
detent. Select the desired Delayed Triggering SLOPE,
COUPLING, and SOURCE.
3. Adjust the Delayed Triggering LEVEL control to produce an
intensified portion on the display.
4. Inability to produce an intensified zone on the display
indicates that the Delayed Triggering controls are incorrectly
set. If the condition cannot be remedied with the Delayed
Triggering controls or by increasing the display amplitude
(lower volts/division setting), externally trigger the delayed
sweep.
5. When the correct portion of the display is intensified, press
Figure 2-10. Using delayed sweep for magnification.in the DLY'D Time/Division switch for the Delayed Sweep
mode, slight readjustment of the Delayed Triggering LEVEL
6. Position the start of the intensified portion with the DELAYcontrol may be necessary to produce a stable delayed sweep
TIME MULT dial to the part of the display to be magnified.display.
7. Set the DLY'D Time/Division switch to a setting which6. Measurement and magnification are as described in the
Delayed Sweep Magnification discussion.
intensifies the full portion of the display to be magnified. The
start of the intensified trace will remain as positioned in step 6.
Displaying Complex Signals Using Delayed Sweep
8. Press in the DLY'D Time/Division switch for the DelayedComplex signals often consist of a number of individual events
Sweep mode.of differing amplitudes. Since the trigger circuits are sensitive
to changes in signal amplitude, a stable display can normally
9. Time measurements can be made from the display in thebe obtained only when the sweep is triggered by the event(s)
conventional manner. Sweep rate is set by the DLY'D Time/having the greatest amplitude. However, this may not produce
Division switch.the desired display of a lower-amplitude portion which follows
the triggering event. The delayed sweep feature provides a
10. The apparent sweep magnification can be calculated bymeans of delaying the start of the delayed sweep by a
dividing the TIME/DIV OR DLY TIME switch setting by theselected amount following the event which triggers the Main
DLY'D Time/Division switch setting.Sweep Generator. Then, the part of the waveform which
contains the information of interest can be displayed at the
Example: The apparent magnification of the display shown indelayed sweep rate.
figure 2-10 with a TIME/DIV OR DLY TIME setting of 200 ns
and a DLY'D Time/Division switch setting of 20 ns is:
2-16 |
ACEC
