Mega
Plus
®
Model 1.4i
4. INTERFACE SPECIFICATIONS
4.1 Introduction
Chapter four gives you the information needed to interface the MEGAPLUS Camera, Model 1.4i
to a frame grabber device. The relationship between the video outputs and the synchronization
outputs of the camera are presented in the following order:
• DIGITAL INTERFACE CONNECTOR
• MODE CONTROL
• EXPOSURE TIMING
• FRAME TIMING
• LINE TIMING
• PIXEL TIMING
The MEGAPLUS Camera, Model 1.4i is a high-resolution black and white still camera presenting
an eight bit digital video output. Each frame has 1,317 columns and 1,035 rows of pixels (picture
elements) containing valid video data.
4.2 Digital Video Connector
All the signals referred to in this section are present at the Digital 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 .050 pin spacing and a D-type shell that is 2.5
inches long. We have taken precautions to prevent damage to the CCU should a SCSI device
accidentally be connected to this port.
4.3 Digital Video Outputs
The digital video output of the camera has eight bits labeled MSB through MSB-7. These signals
are output as differential pairs with signal levels conforming to the RS422 specification. The
noninverting part of the differential pair is present on output (+), while the inverting part of the
differential pair is present on output (-).
MSB is the Most Significant Bit and MSB-7 is the least significant bit in this camera configuration.
All frame grabbers designed to work with this and future
Mega
Plus Cameras should be MSB
justified. MSB will always be the most significant bit in all eight or ten bit camera configurations.
4.4 Timing Outputs
There are three timing outputs presented on the Video connector. They are FRAME ENABLE,
LINE ENABLE and PIXEL DATA STROBE. These signals are output as differential pairs with
signal levels conforming to the RS422 specification. The noninverting part of the differential pair
is present on output (+), while the inverting part of the differential pair is present on output (-). A
signal is true when the (+) line is more positive than the (-) line.
91000050-002 Revision A
4-1
USER’S MANUAL
Summary of Contents for 1.4i
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