HP 3562A Operating Manual page 57

T H E FREQUENCY RESPONSE MEASUREMENT
The frequency response measurement, often called the "transfer function," is the ratio of a
system's output to its input and yields both gain and phase as a function of frequency. (The
phase response can be viewed by pressing PHASE in the COORD menu.
the signal on Channel 1 is assumed to be the system's input, and the signal on Channel 2 is
assumed to be its output To select the frequency response measurernent, press SELECT
MEAS, followed by the FREO RESP softkey.
To select a display for this rneasurement, press MEAS DISP to display the following rnenu:
FREQ
RESP
COHER
POWER
SPEC1
POWER
SPEC2
CROSS
SPEC
IMPLS
RESP
AUTO
MATH
FILTRD
INPUT
Displays the frequency response. When default units and
coordinates are active, this displays frequency on the X­
axis and gain on the Y-axis.
Calculates and displays the coherence of the frequency
response. (This softkey does not appear if time averaging
is selected-"-"see " Averaging in the Linear Resolution
Mode" later in this chapteL)
Displays the power spectrum measured on Channel 1 .
Displays the power spectrum measured on Channel 2.
Displays the cross spectrum.
Displays the impulse response.
Selects the display calculated with the auto math routine;
see "Auto Math" in Chapter 9. Note that this label might
be replaced by a user-defined label.
Displays the filtered input menu, which provides time
record and linear spectrum displays; see "Filtered Input
Displays" later in this chapter.
r
G h p te 1-Uslng the
a Linear Hesolution
THE FREQUENCY RESPONSE MEASUREMENT
)
In the H P 3562. A ,
Mode
1-3