Redlake MASD MegaPlus ES 4.0/E, User Manual

Page: 27 / 40

Mega Plus
®
Model ES 4.0/E
4. INTERFACE SPECIFICATIONS
4.1 Introduction
Chapter Four gives you the information needed to interface the Mega Plus Camera, Model ES
4.0/E, to a frame grabber device. The Mega Plus camera is a megaresolution black and white
camera with eight or twelve bit digital video output. Each frame has 2,048 columns and 2,048
rows of pixels (picture elements) containing valid video data.
4.2 Digital Interface Connector
All of the signals referred to in this section are present at the digital interface connector on the
rear panel of the camera. Table 4-1 lists each signal and its pin number. The connector for this
port is a 68-pin, high density, dual row, D type connector. This connector is the same as that
used for the “SCSI-2 B cable” interface. The connector has 0.050 inch (1.27 mm) pin spacing
and a D-type shell that is 2.5 inches (63.5 mm) long.
4.3 Camera Link Connector (Optional)
All of the signals referred to in this section are present at the Camera Link connector on the rear
panel of the camera. Table 4-3 lists each signal and its pin number. The connector for this port
is a 26-pin, high-density, Mini-D ribbon connector (manufactured by 3M). Cable assemblies and
boardmount receptacles are available from Redlake or 3M. For more information on 3M
products, see the 3M website at www.3M.com.
4.4 Digital Video Outputs
The camera has provisions for two twelve-bit digital video output channels. Channel A bits are
labeled AMSB through AMSB-11. Channel B bits are labeled BMSB through BMSB-11. The
AMSB indicates the Most Significant Bit (MSB) and the AMSB-11 is the Least Significant Bit
(LSB). These signals are output as differential pairs with signal levels conforming to the RS644
specification. Most RS422 receivers work with RS644 low voltage differential signal levels. The
non-inverting part of the differential pair is present on the (+) output, while the inverting pair of the
differential pair is present on the (-) output. A signal is true when the (+) line is more positive than
the (-) line.
4.5 Timing Outputs
There are three timing outputs presented on the digital interface connector. They are FRME ENA
(frame enable), LINE ENA (line enable) and PIX DATA STRB (pixel data strobe). These signals
are output as differential pairs with signal levels conforming to the RS644 specification. Most
RS422 receivers work with RS644 low voltage differential signal levels. The non-inverting part of
the differential pair is present on the (+) output, while the inverting pair of the differential pair is
present on the (-) output. A signal is true when the (+) line is more positive than the (-) line.
4.6 Control Inputs
The control input EXPOSE is provided as a means of externally synchronizing the camera. Drive
this input differentially by connecting the (+) and (-) inputs to an RS644 driver.
91000116-001 Revision B 4-1 USER’S MANUAL