Agilent Technologies 8510C, Operating And Programming Manual

Page: 94 / 391

DISPLA Y Functions
T o Define Minimum Limit Lines
If desired, use the RPG, step k eys, or n umeric k eypad to dene minimum limits. Minimum
limits may b e at frequencies that are dieren t from the maxim um limit frequencies. It is
acceptable to en ter minimum limits b efore or after en tering maximum limits.
F or this example, the frequencies used for maximum and minimum limit lines are slightly
dieren t. Refer to the table b elow:
Lo cation F requency of In terest
The low side of the cut-o
frequency p ortion
125 MHz to 150 MHz
The bandpass p ortion 155 MHz to 195 MHz
The high-side of the cut-o
frequency p ortion
200 MHz to 225 MHz
1. Press 4
PRIOR MENU
5, then
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ADD MIN LINE to set up the limit line for the device's low er lev el
resp onse.
2.
Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
BEGIN STIMULUS and en ter 125 MHz, the b eginning frequency of the rst minimum
limit line.
Note
Correct a mistak e b y using the follo wing tec hnique:
If y our incorrect v alue is en tered and y ou ha v e not pressed 4
MHz
5, bac k space
o v er the error, then en ter the correct v alue.
If y ou ha v e pressed 4
MHz
5 for the incorrect v alue, press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
BEGIN STIMULUS
and en ter the corrected v alue.
3. Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
END STIMULUS . En ter 150 MHz, the ending frequency of the rst minimum limit
line. A limit line is dra wn b et w een the t w o frequency v alues y ou en tered, at a zero (0.0)
unit lev el.
4. Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
BEGIN LIMIT and w atch the limit segmen t and measuremen t trace as y ou rotate the
RPG knob to adjust the limit segmen t.
5. Place the b eginning of the limit line at 050 dB, whic h is the device's minimum allo w able
output p o w er lev el for the b eginning frequency .
Note
Notice that the p o w er lev el and frequency v alue app ear in the limit-test table.
Y ou can iterate b et w een setting the b eginning and ending of the limit line
p osition.
6. Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
END LIMIT and rotate the RPG to p osition the end of the limit line at 010 dB, the
device's minimum allo w able output p o w er lev el for the ending frequency .
7.
Press 4 PRIOR MENU 5, then
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ADD MIN LINE and rep eat the steps ab o v e for the second and
third minimum limit lines. F or this example,
1) 155 MHz to 195 MHz, and 2) 200 MHz to 225 MHz
Measurement Controls 4-15