R3765/67G Series Network Analyzer Operation Manual
7.8 CDMA IF Filter Analysis Function
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7.8
CDMA IF Filter Analysis Function
This function is suitable for measuring the characteristics of CDMA IF filter.
(1)
Gate function of the CDMA IF filter
Obtains the frequency characteristics specifying the defined range of the filter delay time.
(2)
Magnitude analysis function of the CDMA IF filter
The items to be analyzed are as follows:
• Center frequency: The center frequency between the two frequencies from which each
magnitude is attenuated by the specified value from the peak value.
• Pass bandwidth: The frequency band between the two frequencies from which each
magnitude is attenuated by the specified value from the peak value.
• Insertion loss: The peak value
• Ripple within the pass band: The difference between the peak and lowest local minimum
values.
• Guaranteed attenuation: Lower value between the left and right values obtained by cal-
culating the difference between the insertion loss and the value whose frequency is ob-
tained either by adding the specified frequency to the center frequency (right side) or by
subtracting the specified frequency from the center frequency (left side).
(3)
Phase analysis function of the CDMA IF filter
Calculates the phase linearity of the IF filter.
Operation procedure:
Press the {FUNCTION} to call the function menu.
Press the {CDMA IF FILTER} to call the CDMA IF filter analysis menu.
CDMA IF filter analysis menu
Each channel can be set individually.
{CDMA IF GATE [ ]}
: Calls the CDMA IF filter analysis menu (see
).
{CDMA FILTER ANALYSIS [ ]} : Calls the CDMA IF filter magnitude analysis menu
(see ).
{CDMA PHASE LINEARITY [ ]} : Turns the CDMA phase linearity analysis ON or
OFF. This function calculates phase linearity in
compliance with the standards of the CDMA IF
filter. The CDMA phase linearity analysis cannot
be performed at the same time as the phase
linearity analysis.
{PHASE LINEARITY [ ]}
: Calls the Phase linearity analysis menu (see
).
CDMA IF filter gate menu
Each channel can be set individually.
{CDMA IF GATE ON/OFF} : Toggles the CDMA IF filter gate function ON or OFF.
The CDMA IF GATE cannot be ON together with the
gate function of the time domain transformation function.
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