HP 86037B, Instruction Manual

Page: 24 / 204

2-6
Operation
The Main Window
Wavelength Selection area
The Wavelength Selection area shows
the current wavelength settings. Single-
band systems only show the settings for
the single band. With dual-band systems,
only the settings for the selected band
are active. For example, this figure
shows the 1500 nm band active. To acti-
vate a band,
refer to “Range menu” on
page 2-18 and turn on the appropriate
band.
Start and Stop
The start and stop wavelength settings define the limits of the test. The tun-
able laser source’s display shows an error message if the values in the start and
stop wavelength fields are greater than the range of the tunable laser source.
The HP 86037B application does not indicate an error. The shaded area in
Fig-
ure 2-2 shows the wavelength range where the selected tunable laser source
power is more than the tunable laser source can deliver. If you select a wave-
length range within the shaded area, the tunable laser source displays an error
and continue to put out as much power as it can.
Figure 2-2. TLS power roll-off in relation to wavelength range
# Steps and Delta
The # Steps field sets the number of measurement points between the start and
stop wavelengths. The Delta field shows the step size in nanometers between
each measurement point. After entering values for one of these fields, the sys-
tem automatically calculates the other field. The greater the number of data
P
o
w
e
r Le
ve
l
Wavelength Range
User-Selected
Wavelength Range
User-Selected
TLS Power
TLS power will be less than
user-selected power
TLS Output Power vs. Wavelength Curve TLS Output Power vs. Wavelength Curve TLS Output Power vs. Wavelength Curve TLS Output Power vs. Wavelength Curve