User`s manual

Basic Operation and Features

Basler A500

k 3-25

PRELIMINARY

3.3.4.1 Free-run Mode with Asynchronous Timing

Figure 3-20: Free-run, Programmable Mode - Exposure Start and Stop with Frame Valid Low

The effective exposure starts 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 3-20):

• The effective exposure starts d microseconds after the rise of the internal control signal

(exposure start delay).

• The duration of the effective exposure is defined by Timer 1.

A504k A503k A501k

p Exposure as set by Timer 1

1.9 µs 1.9 µs 7 µs

Internal

Control

Signal

p = Timer 1

Internal Control Signal Period

Timer 2

3 µs (A504k)

3.5 µs (A503k)

20.1 µs (A501k)

Frame

Valid

Line

Valid

d = 1.9 µs (A504k)

d = 1.9 µs (A503k)

d = 7 µs (A501k)

Integrate

Enabled

p = Timer 1

TIMING CHARTS ARE NOT DRAWN TO SCALE