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Programming and Syntax Diagram Conventions
HP 8163A Lightwave Multimeter, HP 8164A Lightwave Measurement System,
& HP 8166A Lightwave Multichannel System User's Guide, E1299
• When a register value is given or returned (for example *ESE), the decimal
values for the single bits are added. For example, a value of nine means that bit
0 and bit 3 are set.
• Larger blocks of data are given as Binary Blocks, preceded by
"#<H><Len><Block>", terminated by <END>; <H> represents the number
of digits, <Len> represents the number of bytes, and <Block> is the data
block. For example, for a Binary Block with 1 digit and 6 bytes this is:
#16TRACES<END>.
Slot and Channel Numbers
Each module is identified by a slot number and a channel number. For commands
that require you to specify a channel, the slot number is represented by [n] in a
command and the channel number is represented by [m].
The slot number represents the module's position in the mainframe. These are:
• from one to two for the HP 8163A,
• from zero to four for the HP 8164A, and
• from one to seventeen for the HP 8166A.
These numbers are displayed on the front panel beside each module slot.
N O T E
The HP 8164A slot for back-loadable tunable laser modules is numbered zero.
Channel numbers apply to modules that have two inputs/outputs, for example, the
HP 81635A Dual Power Sensor.
Modules with two channels, for example, the HP 81635A Dual Power Sensor, use
the channel number to distinguish between these channels.
N O T E
The channel number of single channel modules is always one.
For example, if you want to query slot 1, channel 2 with the command,
":SENSe[n]:[CHANnel[m]]:POWer:WAVelength?" on page 83, you should
send the command:
• :sens1:chan2:pow:wav?
N O T E
If you do not specify a slot or channel number, the lowest possible number is used
as the default value. This means:
•
Slot 1 for the HP 8163A and HP 8166A mainframes.
•
Slot 0 for the HP 8164A mainframe.
•
Channel 1 for all channels.
Introduction to Programming
21
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