Creating Flat Limit Lines - Agilent Technologies 8753ET User Manual

Making Measurements
Using Limit Lines to Test a Device
3. Substitute a thru for the device and perform a response calibration by pressing:
CALIBRATE MENU
Cal
4. Reconnect your test device.
5. To better view the measurement trace, press:
AUTO SCALE
Scale Ref

Creating Flat Limit Lines

In this example procedure, the following flat limit line values are set:
Frequency Range
127 MHz to 140 MHz
100 MHz to 123 MHz
146 MHz to 160 MHz
The minimum value for measured data is −200 dB.
NOTE
1. To access the limits menu and activate the limit lines, press:
System LIMIT MENU
2. To create a new limit line, press:
ADD
The analyzer generates a new segment that appears on the center of the display.
3. To specify the limit's stimulus value, test limits (upper and lower), and the limit type,
press:
STIMULUS VALUE
UPPER LIMIT
LOWER LIMIT −27
You could also set the upper and lower limits by using the
NOTE
and
DELTA LIMITS
MIDDLE VALUE
This would correspond to a test specification of −24 ±3 dB.
4. To define the limit as a flat line, press:
LIMIT TYPE FLAT LINE
1-76
RESPONSE
Power Range
−27 dB to −21 dB
−200 dB to −65 dB
−200 dB to −65 dB
LIMIT LINE ON
127 M/µ
−21
x1
DONE
x1
keys. To use these keys for the entry, press:
−24
x1
RETURN
THRU
EDIT LIMIT LINE
DELTA LIMITS
3
CLEAR LIST YES
MIDDLE VALUE
x1