Bristol 428 - Front Panel Controls; Display Screens

Model 428 User’s Manual OPERATION
Bristol Instruments, Inc. 11
Front Panel Controls
Five control buttons on the front panel select and change parameters that affect how data
is collected and reported (Figure 3.1). These control buttons switch between the different
Display and Configuration Screens, and change the value or status of parameters on
each screen. The names and functions of the Control Buttons are listed below (from left
to right).
Mode
This button is used to cycle between the different Display and Configuration
Screens: Main, List, and Config. Within Config mode, there are six separate
Configuration Screens that can be accessed using the Change button.
Up () and Down () Arrows
These buttons are primarily used to scroll through a list of wavelength values on
the List Mode Display Screens. Pressing the Arrow buttons will also cycle
through the values or status options for the highlighted parameter if other options
are available.
Change
This button is used to cycle through a highlighted parameter’s values or status options.
Select
This button cycles between the user-changeable parameters on the currently
displayed screen.
Display Screens
Two Display screens are used to report measurement data. Pressing the Mode button
cycles between the Main Mode Display Screen, the List Mode Display Screen, and the
Config Mode Display Screen.
Main Mode Display Screen
Displays both wavelength and power, in the chosen units, of either the highest-
power laser channel (Peak), a single chosen laser channel (Chan), or the
weighted average of all wavelengths and powers (FPAv).
1523.4888
-9.93
A v g : O f f
P o f f s : O f f
nm- v a c
d B m
c h 5 o f 8
P e a k
M a i n
M o d e


C h a n g e
S e l e c t
Figure 3.3: Main Mode Display Screen
 Wavelength – Displays the measured wavelength (nm), wavenumber (cm
-1
),
or frequency (THz) of the optical signal under test.