MultiCam Boards Documentation > GRABLINK series Documentation > GRABLINK Full Handbook > Functional Specification > Camera Link Interface > Enable Signals > FVAL Timing Diagram > Area-Scan Acquisition Mode

Area-Scan Acquisition Mode

When the board is configured for image acquisition from area-scan cameras:

FVAL timing diagram (area-scan acquisition mode)

If the acquisition trigger is armed when FVAL raises, the board

  1. Skips a pre-defined amount (VsyncAft_Ln) of video data lines at begin of frame (BOF),
  2. Acquires a pre-defined amount (Vactive_Ln) of video data lines,
  3. Terminates the image acquisition

The subsequent video data lines are all skipped until a new FVAL rising edge occurs.

Applicable limits on FVAL signal

Parameter

Min

Typ

Max

Unit

FVAL high duration

64

Lines with active video

N/A

Clock cycle

FVAL low duration

64

Lines with blanked video

N/A

Clock cycle

FVAL rising edge to LVAL rising edge setup time

0

-

N/A

Clock cycle

Skipped lines at begin of frame (BOF)

0

0

255

LVAL cycle

Acquired lines

Refer to Vactive_Px

-

Refer to Vactive_Px

LVAL cycle

Skipped lines at end of frame (EOF)

0

-

N/A

LVAL cycle