Basler A501kc Manual de usuario descargar pdf (Pagina 70)

Basic Operation and Features

3-20 Basler A500k

PRELIMINARY

3.3.3.1 ExSync, Programmable Mode with Asynchronous Timing

Figure 3-16: ExSync, Programmable Mode - Exposure Start and Stop with Frame Valid Low

The effective exposure occurs 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 3-16):

• 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 (f) may shorten the effective exposure, i.e. duration of the effective exposure = p - f.

Due to the propagation time of approximately 1 µs, ExSync can go high up to 1 µs before the

Frame Valid signal goes low.

A504k A503k A501k

p Exposure as set by Timer 1

1.7 µs 1.7 µs 7.2 µs

0 µs 0 µs

 5.5 µs

ExSync

p = Timer 1

ExSync Period

4.7 µs (A504k)

5.5 µs (A503k)

26.4 µs (A501k)

Frame

Valid

Line

Valid

d = 1.7 µs (A504k)

d = 1.7 µs (A503k)

d = 7.2 µs (A501k)

Integrate

Enabled

f = 0 µs (A504k)

f = 0 µs (A503k)

f =



5.5 µs (A501k)

p = Timer 1

TIMING CHARTS ARE NOT DRAWN TO SCALE

1 2 ... 65 66 67 68 69 70 71 72 73 74 75 ... 149 150

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Basler A501kc Manual de usuario Pagina 70