Table of Contents
Advertisement
Photon User Guide 412-0035-00-10 Version 100
Command and Control Channel
Remote control of the Photon camera is provided via a RS-232 serial interface consisting of
signals named RX, TX and GND using 3.3 volt signal levels. Section 7 provides information
regarding remote control using the Photon OEM GUI. The Electrical Interface Control
Document (ISC doc. 102-1238-41) describes the serial communications protocol for the Photon
camera.
Digital Data Channel
Photon provides a digital channel with real-time serialized digital video. The camera outputs
either 8-bit or 14-bit data using the SD_CLK±, SD_FSYNC± and SD_DATA± signals.
Conversion of the digital data to a parallel format for data acquisition requires a serial-to-parallel
converter accessory or an Ethernet Module which is also an accessory. Section 8 provides
information regarding the digital data interface. Also, the Electrical Interface Control Document
(ISC doc. 102-1238-41) describes the specific timing information.
External Synchronization
Photon camera provides the ability to either accept or output frame synchronization if needed.
1.
Slave Mode: The camera will accept a frame synchronization signal on the interface
connector (DIS0_EXT) when configured as a slave via the serial communications port. The sync
signal starts the FPA frame timing sequence. The sync signal consists of a positive going, 3 volt
pulse as defined in Table 5. The frame sync signal should be sent only once per frame and the
camera core will not output digital data until a valid frame sync is received. The video output
(analog) of the camera core is enabled while in external sync mode, however, the video frame
rate depends upon the external frame sync rate (e.g. the analog video may not conform to timing
standards). The camera synchronization state must be set prior to power-up (e.g. after the mode
is changed and saved, the camera must be re-started).
Table 5: Frame Sync Input Requirements
Frequency
Pulse width
Range
(minimum)
0 to 30 Hz
135ns
2. Master Mode: The camera will output a frame synchronization signal on the interface
connector (DIS0_EXT) when configured as a master via the serial communications port. The
sync signal corresponds to the start of the FPA frame timing sequence. The sync signal shall
consist of a positive going, 3 volt pulse as defined in Error! Reference source not found. . The
frame sync signal shall occur only once per frame. This signal output is intended to drive one
Photon which is configured for slave mode operation.
9
Advertisement
Table of Contents
