Acterna SPM-32A, Operating Manual

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SPM-32A ... SPM-36A 4.2 Operation and features
4-53
Using a measured level as a reference level
A result is stored as a reference level by entering the
following key sequence:
"!" is displayed in the lower left-hand corner of the display as
an acknowledgment.
Example: Attenuation of a channel filter at 4 kHz
The reference frequency is 1 kHz. The difference between
the levels measured at 1 kHz and 4 kHz is to be determined.
•
Tune the receiver to 1 kHz (reference frequency):
•
Measure the voltage level at 1 kHz
• Store the measured level as the reference
•
Tune the receiver to 4 kHz
*
ABS
→
REF
ABS-
REF
TUNE 1 ENTER
ABS
*
ABS
→
REF
ABS-
REF
4 ENTER