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5.1.5
Output Level Linearity (R3755A/R3755TF)
5-4
15.
The span and the output level are fixed. Change the center frequency and read data
from the power meter.
NOTE: Use the calibration factor at the center frequency.
16.
Check that the Flatness of 0 dBm is as follows.
R3755A
1 MHz to 100 MHz
5.0 dBp-p
100 MHz to 300 MHz
8.0 dBp-p
R3755TF 10 kHz to 10 MHz
5.0 dBp-p
5.1.5. Output Level Linearity (R3755A/R3755TF)
Testing procedure
17.
Perform the ZERO calibration for the power meter.
18.
Set the R3755x as follows.
PI circuit
: ON
Center frequency
: 10 MHz
Span
: 0 Hz
Output level
: 0 dBm
19.
Connect the power sensor to the output terminal as shown in the figure below.
Figure 5-3 Output Level Linearity
20.
Press the
[REL]
key on the power meter and set it to 0 dB (ratio test mode).
21.
Obtain the linearity data when the output level is changed.
NOTE: The calibration factor should be set to 10 MHz.
22.
Check that the output level linearity of 0dBm is as follows.
R3755A
+18 dBm to -35 dBm
±
1.5 dB
-35 dBm to -43 dBm
±
2.5 dB
R3755TF 0 dBm to -30 dBm
±
1.5 dB