To Set The Grating Order Mode; To Set The Wavelength Limit - HP 86140A Series User Manual

To set the grating order mode

1 Press the front-panel System key.
2 Press the More System Functions.... softkey.
3 Press the Service Menu.... softkey.
4 Press the Adv Service Functions.... softkey.
5 Press the Grating Order softkey.
6 Toggle between 1 and AUTO.
The Grating Order function lets you choose between 1
the Automatic setting. The Automatic mode selects 2
wavelength is less than 900 nm. The 2
higher measurement sensitivity. Note that the 10 nm resolution bandwidth is
not available when using the 2
listed in the OSA State Information.
panel" on page 3-47

To set the wavelength limit

1 Press the front-panel System key.
2 Press the More System Functions.... softkey.
3 Press the Service Menu.... softkey.
4 Press the Adv Service Functions.... softkey.
Note
The optical spectrum analyzer compensates for temperature-related current drift
between each sweep. Although this "zeroing" increases amplitude accuracy, it increases
the time between sweeps. If amplitude accuracy is not critical to your measurement, you
can turn off zeroing. Refer to
The optical spectrum analyzer performs a more complete zeroing when the instrument is
first turned on. You can run this more complete routine anytime by pressing the
softkey.
NOW
for more information.
"Auto Zero" on page 3-12
nd
order grating mode provides a slightly
nd
order grating mode. The grating order is
See "To display the OSA State information
Using the Optical Spectrum Analyzer
The System Menus
for additional information.
ZERO
st
order grating only and
nd
order mode if the stop
3-51