Ocean Optics SAD500 Communications and Control - Manual (Page 8)

8
Pixel Mode
Description: Specifies which pixels are transmitted or stored in slow memory. While all pixels are acquired
on every scan, this parameter determines which pixels will be transmitted or stored.
Command Syntax: P{ DATA WORD }
Value:
Description
0 = all 2048 pixels
1 = every n
th pixel with no averaging
2 = every n th pixel with averaging (effective boxcar
width of n)
3 = pixel x through y every n pixels
4 = up to 81 randomly selected pixels between 0 and
2047 (denoted p1, p2, … p81)
256 = all 2048 pixels, compressed
257 = every nth pixel with no averaging, compressed
258 = every nth pixel with averaging, compressed
259 = pixel x through y every n, compressed
260 = up to 81 selected pixels, compressed
512 = all 2048 pixels, with CDS
513 = every nth pixel with no averaging, with CDS
514 = every nth pixel with averaging, with CDS
515 = pixel x through y every n, with CDS
516 = up to 81 selected pixels, with CDS
768 = all 2048 pixels, compressed, with CDS
769 = every nth pixel with no averaging, compressed,
with CDS
770 = every nth pixel with averaging, compressed, with
CDS
771 = pixel x through y every n, compressed, with CDS
772 = up to 81 selected pixels, compressed, with CDS
Example
P 0
(spaces for clarity only)
P 1 n
P 2 n
P 3 x y n
P 4 n p1 p2 p3…p81
Response: ACK or NAK
Default value: 0
All pixel modes involving correlated double sampling can only be used with the S1024DW
spectrometer.
Since most applications only require a subset of the spectrum, using the Pixel Mode command can
greatly reduce the amount of time required to transmit a spectrum while still providing all of the
desired data.
Initialize
Description: Sets all operating parameters to their default value.
Command Syntax: Q
Response: ACK or NAK
This command resets operating parameters to the parameters that were read from flash memory at
power-up.