User`s manual

MegaPlus
®
Model ES 1.0
4. INTERFACE SPECIFICATIONS
4.1 Introduction
Chapter 4 gives you the information needed to interface the MegaPlus Camera, Model ES 1.0, to
a frame grabber device. The MegaPlus camera is a megaresolution black and white camera with
dual eight or ten bit digital video output. Each frame has 1,008 columns and 1,018 rows of pixels
(picture elements) containing valid video data.
4.2 AIA Interface Connector
All of the signals referred to in this section are present at the AIA interface connector on the rear
panel of the camera. Table 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 (0.127 cm) pin spacing and a D-type
shell that is 2.5 inches (6.35 cm) long.
4.3 Digital Video Outputs
The camera has two digital video output channels, A and B, each with eight or ten bits labeled
MSB through MSB-7 or MSB-9. The MSB is the Most Significant Bit and MSB-7 or MSB-9 is the
LSB (Least Significant Bit) in your camera configuration. These signals are output as differential
pairs with signal levels conforming to the EIA-644 (LVDS) specification. The noninverting part of
the differential pair is present on the output labeled (+), while the inverting part of the differential
pair is present on the output labeled (-).
4.4 Timing Outputs
There are three timing outputs presented on the AIA 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 EIA-644 specification. The
noninverting part of the differential pair is present on the (+) output, while the inverting part of the
differential pair is present on the (-) output. A signal is true when the (+) line is more positive than
the (-) line.
4.5 Control Inputs
The control input EXPOSE is provided as a means of externally synchronizing the camera. This
input is designed to accept RS-422 differential, or single ended TTL. To drive this input
differentially connect both the (+) and (-) inputs to an RS-422 driver. Connect one input to a TTL
driver and leave the other input floating to drive the EXPOSE input from a single ended signal
source.
91000064-004 Revision A 4-1 USER’S MANUAL