Photon Focus MV2-D1280-640, Руководство пользователя, Страница: 45 / 85

STROBE_VDD Pull-up Resistor
15 V > 3.9 kOhm
10 V > 2.7 kOhm
8V > 2.2 kOhm
7V > 1.8 kOhm
5V > 1.0 kOhm
Table 5.1: Pull-up resistor for strobe output and different voltage levels
5.1.4 Status Indicator
Two dual-colour LED’s on the back of the camera gives information about the current status of
the CameraLink cameras.
LED Green Green when an image is output. At slow frame rates, the LED blinks with the
FVAL
signal. At high frame rates the LED changes to an apparently continuous
green light, with intensity proportional to the ratio of readout time over frame
time.
LED Red Red indicates an active serial communication with the camera.
Table 5.2: Meaning of the S0 LED
LED S1 is reserved for future use.
5.2 CameraLink Data Interface
The CameraLink standard contains signals for transferring the image data, control information
and the serial communication. In PoCL camera models the power supply is provided by the
same data interface.
Data signals: CameraLink data signals contain the image data. In addition, handshaking
signals such as FVAL , LVAL and DVAL are transmitted over the same physical channel.
Camera control information: Camera control signals (CC-signals) can be defined by the camera
manufacturer to provide certain signals to the camera. There are 4 CC-signals available
and all are unidirectional with data flowing from the frame grabber to the camera. For
example, the external trigger is provided by a CC-signal (see Table 5.3 for the CC
assignment).
CC1 EXSYNC External Trigger. May be generated either by the frame grabber itself
(software trigger) or by an external event (hardware trigger).
CC2 CTRL0
Control0. This signal is reserved for future purposes and is not used.
CC3 CTRL1 Control1. This signal is reserved for future purposes and is not used.
CC4 CTRL2 Control2. This signal is reserved for future purposes and is not used.
Table 5.3: Summary of the Camera Control (CC) signals as used by Photonfocus
Pixel clock: The pixel clock is generated on the camera and is provided to the frame grabber
for synchronisation.
5.2 CameraLink Data Interface 43