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Making Measurements
Using Limit Lines to Test a Device
3. Substitute a thru for the device and perform a response calibration by pressing:
4. Reconnect your test device.
5. To better view the measurement trace, press:
Creating Flat Limit Lines
In this example procedure, the following flat limit line values are set:
NOTE The minimum value for measured data is −200 dB.
1. To access the limits menu and activate the limit lines, press:
2. To create a new limit line, press:
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:
NOTE You could also set the upper and lower limits by using the
and keys. To use these keys for the entry, press:
This would correspond to a test specification of −24 ±3 dB.
4. To define the limit as a flat line, press:
Frequency Range Power Range
127 MHz to 140 MHz −27 dB to −21 dB
100 MHz to 123 MHz −200 dB to −65 dB
146 MHz to 160 MHz −200 dB to −65 dB
Cal
CALIBRATE MENU
RESPONSE
THRU
Scale Ref
AUTO SCALE
System
LIMIT MENU
LIMIT LINE
LIMIT LINE ON
EDIT LIMIT LINE
YES
ADD
STIMULUS VALUE
127 M/µ
UPPER LIMIT
−21 x1
LOWER LIMIT
−27 x1
DONE
MIDDLE VALUE
DELTA LIMITS
MIDDLE VALUE
−24
x1
DELTA LIMITS
3x1
LIMIT TYPE
FLAT LINE
RETURN