RMV Operations Manual Revision Copyright illunis LLC, 2014
Page 130
In this release of the RMV (4) the concept of gain has changed to a fixed analog gain and a vari-
able digital gain. This allows the analog section to be set to an optimum setting for noise and linearity
and allow the flexibility of a continuously variable user gain.
FAQ# 15:
What is the difference between single tap and single channel
mode ?
The single tap mode refers to the CCD sensor operation. The Kodak CCD sensors can be
clocked in one or two tap modes. The two tap mode will read the image from the sensor twice as fast as
the single tap mode. The RMV reorders the two tap image data with the TRO circuit. The internal reor-
dered data is then processed as a single image raster.
The single channel mode refers to the Camera Link operation. The camera link base mode data
transfer can occur in one or two channels, each with 8/10/12 bits per channel. Another way to describe
the channels is to refer to them as pixels. Thus for each clock cycle, of the camera link transport, either
a single pixel or two pixels can be transferred. The two channel mode can transfer twice the data for a
given clock rate and thus reduces the pixel clock and camera power.
FAQ# 16:
How do I see the optical black pixels?
The RMV (firmware release D9) has a new mode called overscan that is used to view the optical
black pixels.
FAQ# 17:
I have a third party cameralink cable that does not always work !
Run into the woods screaming ! Seriously the camera link specification is very specific about
cable design. To date only two venders have bee qualified for camera link cables: Intercon1 and 3M.
Do not confuse a 3M manufactured cable with a cable that uses 3M branded cable. We have found
several cables manufactured offshore that do not meet the camera link maximum cable length and data
rates. Please do not use unauthorized camera link cables.
DGO
1/4096 to 16X
± 4096
LUT
PxGA
4dB ± 6dB
VGA
2dB to 36dB
CLAMP
0 to 255
FPGA Digital Processing
RMV Image Data Gain and Offsets
Analog to Digital Converter