Sutter Instrument Lambda 10-3, Operation Manual

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LAMBDA 10-3 OPERATION MANUAL – REV. 3.03 (20110829)
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In the previous table, “Decimal Group Values” are equivalent to the values of the desired
Filter Wheel (always 0), Switching Speed (0 through 7) and Filter Position (0 through 9).
Their hexadecimal and binary equivalents are shown as the “Hexadecimal Group Values”
and “Binary Group Values”, respectively. These 8 bits are the raw data, then, that serve as a
Filter Command to select the Filter Position and Switching Speed via the Lambda 10-3
controller’s serial and USB ports. The Wheel bit (Bit 7) is used to select the filter wheel: 0 for
Wheel A or C, and 1 for Wheel B. When selecting Wheel C, the encoded filter wheel command
byte must be preceded by a byte containing the value of 252 decimal (FC hexadecimal), and
Bit 7 in the encoded wheel command byte must be set to 0. In summary, the controller will
treat any byte it receives from the remote computer as a “filter command” if the byte’s least
significant nibble contains a value of 0 through 9. If the received byte’s least significant
nibble contains a decimal value of 10 through 15, then the controller treats the entire byte as
a “special command” or “shutter command”.
5.2.1 5.2.1 5.2.1 5.2.1 Filter Wheel Comm Filter Wheel Comm Filter Wheel Comm Filter Wheel Command Byte Encoding and Byte Encoding and Byte Encoding and Byte Encoding
The following formula may be used to encode all three filter wheel commands into a single
byte. All values are in decimal):
Command byte = (
wheel
* 128) + (
speed
* 16) +
position
Where
wheel
= 0 (Wheel A or C) or 1 (Wheel B),
speed
= 0 through 7, and
position
= 0 through 9.
NOTE: Wheel C is differentiated from Wheel A by having its command byte preceded
by the “Wheel C First Byte” command (252 decimal (FC hexadecimal)).
5.3 5.3 5.3 5.3 Shutter Commands Shutter Commands Shutter Commands Shutter Commands
When the 8-bit command is identified by the controller as one which is not a filter wheel
command, the entire byte is then treated as either a “special” or “shutter” command.
Shutter Commands are described in the following table, along with the decimal, hexadecimal
and binary values that encode them. The paragraphs that follow the table describe these
commands in more detail.
Table 5-5. Shutter commands.
Command
Command Command
Command Value
Value Value
Value
(Decimal,
hexadecimal, &
binary)
Description
Description Description
Description
Open Shutter A Open Shutter A Open Shutter A Open Shutter A 170
AA
10101010
Sets the state of Shutter A to open.
Open Shutter A Open Shutter A Open Shutter A Open Shutter A
Conditionally
Conditionally Conditionally Conditionally
171
AB
10101011
Configures Shutter A to open while the filter wheel is
stopped. The shutter will close each time the filter wheel
moves and then will open again at the end of the move.