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7
Residual Measurement Fundamentals
The Single-sided Spur Method and the Double-sided Spur Method (Option 4) are the two
NO T E
most accurate methods.
Broadband couplers with good directivity are available, at reasonable cost, to
couple in the calibration spur.
Disadvantages
Requires a second RF sources that can be set between 10 Hz and up to 50 MHz
(depending on the baseband analyzer used) from the carrier source frequency.
Requires an RF spectrum analyzer for manual measurement of the
signal-to-spur ratio and the spur offset frequency.
Procedure
1
Source
Calibration
source
Figure 159 Calibration setup for single-sided spur
2
222
Connect circuit as per
input signal into the directional coupler is being supplied to the coupler's
output port.
Power
splitter
output
-10 dB
attenuator
Measure the power level that will be applied to the Signal Input port of the
test set's phase detector.
amplitude ranges for the E5505A system phase detectors.
Figure
159, and tighten all connections. Note that the
Optional line
stretcher
RF spectrum
-20 dB
analyzer
coupler
input
Coupler
port
100 kHz
Table 35
on page 223 shows the acceptable
Test set
Signal
input
Phase
detector
Ref input
}
- 40 dBc
E5505a_cal_setup_single_sided
01 Mar 04 rev 1
Agilent E5505A User's Guide
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