RMV Operations Manual Revision Copyright illunis LLC, 2014
Page 91
6.4: Image Detectors
SNR: Signal and Noise Detectors
The SNR
detectors are used to measure sys-
tem noise and signal amplitude. From these measure-
ments a signal to noise ratio can be calculated. See the
following section for the mathematics required to calcu-
late SNR. By dividing the SNR sum values be the num-
ber of samples, the accuracy of the black clamping can
be measured. There are separate detectors for the left
and the right taps.
In 4 tap readout, there are two additional SNR
detectors.
Serial Commands
Target
Index
Command
R/W
Description
04
19
Show Detectors
W
0x0004 = SNR Left
0x0005 = SNR Right
0x0009 = disable
04
1a
Read Detectors
R
0x0004 = Left SNR Sum
0x0005 = Left SNR Sum of Squares
0x0006 = Left SNR Number of Samples
0x0007 = Right SNR Sum
0x0008 = Right SNR Sum of Squares
0x0009 = Right SNR Number of Samples
0x000a = Left SNR Max Value
0x000b = Right SNR Max Value
A and B when BIT5 of PIO x57 is 0
C and D when BIT5 of PIO x57 is 1
Quick FAQ’s:
►SNR detectors are very useful for measuring cam-
era performance.
►SNR can be measured live and displayed as on
screen text.
►
The SNR window position is programmable. Thus
the active imaging area can be used to measure
noise. Call or email [email protected] for details.
►The SNR window vertical limits are set by the AED
window.
SNR Window
Active Pixels
Optical Black Pixels