Getting Started A Description of the User Interface
36 Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement
System, & Agilent 8166A Lightwave Multichannel System, Fourth Edition
Introducing Hardkeys
A hardkey is a key that always has the same function.
Special Module States
Besides parameter or measurement values, you may also see some texts instead.
<empty> The slot is empty.
<unknown> The installed module is not supported by the firmware revision.
Slot and Channel Numbers
Each module is identified by a slot number and a channel number.
You can use slot and channel numbers:
• to identify each channel in the overview screen with a number at the side of the
screen,
• to identify each channel in the Details screen with a tab at the top of the screen,
• to identify the channel when referencing the power measured by another
channel, see “How to Reference Another Power Measurement Channel” on
page 75,
• to identify the channel when using an application, see “Applications” on
page 153, and
• to identify a channel when using a GPIB command, see the Agilent 8163A
Lightwave Multimeter, Agilent 8164A Lightwave Measurement System, &
Agilent 8166A Lightwave Multichannel System Programming Guide for more
information on GPIB commands.
The slot number represents the module’s position in the mainframe. Front-
loadable modules are numbered:
• from one to two from left to right for the Agilent 8163A,
• from one to four from left to right for the Agilent 8164A, and
• from one to seventeen from left to right for the Agilent 8166A.
These numbers are displayed on the front panel beside each module slot. The
Agilent 8164A slot for back-loadable modules is numbered zero.
NOTE Modules with two channels, for example, the Agilent 81635A Dual Power
Sensor, use the channel number to distinguish between these channels.
The channel number of single channel modules is always one.
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