Agilent Technologies 86121A, Руководство пользователя, Страница: 48 / 240

Defining Laser-Line Peaks 3
-
11
To define laser-line peaks
1 Press the
Setup
key.
2 Press the
THRSHLD
softkey.
3 Press
PX EXC
, and enter the peak excursion value. Use
the softkey to select the digit that requires editing.
Use the and softkeys to change the value.
The peak excursion value can range from 1 to 30 dB. The
default value is 15 dB.
4 Press
RETURN
.
5 Press
PK THLD
and then enter the peak threshold value.
The peak threshold value can range from 0 to 40 dB.
Setting this value to 0 dB ensures that only the peak
wavelength is identified. The default value is 10 dB.
Pressing the green
PRESET
key changes the peak excur-
sion and peak threshold values to their default settings.
It also turns wavelength range limiting on. Cycling the
power off and then on does
not change these settings.
If too many lines are identified
If the following message is displayed, too many laser lines
have been identified:
E15 MAX NUMBER OF SIGNALS FOUND
The maximum number of laser lines that can be measured is
200. If this message appears, decrease the peak threshold
value, increase the peak excursion value, or decrease the
wavelength range of operation with the
WL LIM , S TART W L
and STOP WL functions.