General Information
Chapter 226
Performance Test
Standing Wave Ratio (SWR) and Reflection Coefficient (Rho)
Performance Test
This section does not provide a preset test procedure since there are several test
methods and different equipment available to make these measurements. Therefore,
when measuring this specification, the actual accuracy of the test equipment must be
taken into account in order to determine the pass/fail condition. The Maximum
SWR values (also expressed in terms of the Reflection Coefficient [Rho]) for each
model of Power Sensor are listed in Table 2-2.
NOTE For overlapping frequency points, refer to the lower SWR specification.
Table 2-2 Power Sensor SWR and Reflection Coefficient
Frequency Maximum
SWR
(Reflection
Coefficient)
System SWR
Uncertainty
Performance
Limit (Rho -
System Rho
Uncertainty)
Actual
Measurement
8481A
10 to 30 MHz < 1.40 (0.166)
30 to 50 MHz < 1.18 (0.083)
50 MHz to 2 GHz < 1.10 (0.048)
2 to 12.4 GHz < 1.18 (0.083)
12.4 to 18 GHz < 1.28 (0.123)
8482A
100 kHz to 300 kHz < 1.60 (0.231)
300 kHz to 1 MHz < 1.20 (0.091)
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