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OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL
NOTE:
The portion of accentuated brightness will be small if the B TIME/DIV
switch selected position is many steps faster than that of A TIME/DIV
switch.
4. Rotate B TIME/DIV switch [18] until the portion of accentuated brightness
becomes as wide as the portion to be magnified. The portion of accentuated
brightness corresponds to be delayed sweep section.
5. The period from the start of the A sweep to that of the B sweep (the period to
the start of trade accentuation) is called "SWEEP DELAY TIME". This period is
continuously variable by means of the DELAY TIME POSITION knob [35]. Next,
change the HORIZ. DISPLAY MODE switch [38] to the B position.
6. Change the HORIZ. DISPLAY MODE switch [38 ]to the B position. The B
sweep time will be expanded for the full span of the CRT screen.
2. B Triggering delay
When in B delayed sweep, the sweep is not triggered with a signal. Triggering
occurs when A sweep crosses the triggering level set by the DELAY TIME knob [35]. When
the display waveform is magnified by 100 or higher, delay jitter is produced.
The jitter is reduced by triggering the B sweep with the same signal, or with a
triggering signal of multiple or submultiple period. Then DELAY TIME control [35] sets the
minimum delay time between A and B; The real delay time will be that time plus the
additional time needed to reach the next available triggering pulse. As a result, the starting
point of the sweep moves discretely, not continuously, in triggering pulses period steps.
November 2000
Figure 15.- A & B INTEN mode
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