Basler A501kc Manual de usuario descargar pdf (Pagina 71)

Basic Operation and Features

Basler A500

k 3-21

PRELIMINARY

3.3.3.2 ExSync, Programmable Mode with Synchronous/Asynchronous

Timing

Figure 3-17: ExSync, Programmable Mode - Exposure Start When Frame Valid is High, Exposure

Stop When Frame Valid is Low

The effective exposure starts while the Frame Valid signal is high and stops while the Frame Valid

signal is low. The FlashOut signal is set to high while the effective exposure occurs. The start,

stop, and duration of the effective exposure are defined in the following ways (see Figure 3-17):

• The effective exposure starts d microseconds after the rise of the ExSync signal (exposure

start delay).

• Disregarding possible jitter, the duration of the effective exposure is defined by period p (set

by Timer 1).

• Jitter may shorten (f) or extend (g) the effective exposure, i.e.

duration of the effective exposure = p - f.

A504k A503k A501k

p Exposure as set by Timer 1

1.7 µs ... 3.7 µs 1.7 µs ... 4.2 µs 6.9 µs ... 20.2 µs

 1 µs  1.25 µs  7.1 µs

 3 µs  3.75 µs  6.2 µs

p = Timer 1

ExSync

ExSync Period

4.7 µs (A504k)

5.5 µs (A503k)

26.4 µs (A501k)

Frame

Valid

Line

Valid

d = 1.7 µs ... 3.7 µs (A504k)

d = 1.7 µs ... 4.2 µs (A503k)

d = 6.9 µs ... 20.2 µs (A501k)

f =



1 µs (A504k)

f =



1.25 µs (A503k)

f =



7.1 µs (A501k)

p = Timer 1

Integrate

Enabled

TIMING CHARTS ARE NOT DRAWN TO SCALE

g =



3 µs (A504k)

g =



3.75 µs (A503k)

g =



6.2 µs (A501k)

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 149 150

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Basler A501kc Manual de usuario Pagina 71

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