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7
Residual Measurement Fundamentals
Source
Calibration
source
Figure 161 Carrier-to-spur ratio of non-modulated signal
5
6
For the system to accept the adjustment to quadrature, the meter must be
NO T E
within ±2 mV to ±4 mV.
7
8
9
10
224
Power
splitter
output
-10 dB
attenuator
Connect the phase detector.
Adjust the phase difference at the phase detector to 90 degrees
(quadrature) either by adjusting the test frequency or by adjusting an
optional variable phase shifter or line stretcher. Quadrature is achieved
when the meter on the front panel of the test set is set to center scale.
Enter sideband level and offset.
Check quadrature and measure the phase detector constant.
Remove audio source.
Reset quadrature and measure phase noise data.
Optional line
RF spectrum
stretcher
analyzer
-20 dB
coupler
input
Coupler
port
}
<- 60 dBc
Test set
Signal
input
Phase
detector
Ref input
E5505a_carrier_spur_ratio_non_mod
01 Mar 04 rev 1
Agilent E5505A User's Guide
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