Specifications

31
Power at the analyzer inputs
Calculate the IF power levels at the receiver using the following equations:
P
REF
= P
RM
– conversion loss of mixers
1
+conversiongainof85309B–(L3+L5)
P
TEST
= P
TM
– conversion loss of mixers
1
+conversiongainof85309B–(L4+L6)
Where L=CableslossesasshowninFigure11
Conversion gain of 85309B: ~23 dB (typical)
Caution: These values must not exceed the maximum input power level (0.1 dB
compression level) of the receiver (-27 dBm for Option H11 or -14 dBm for Option
014). Reduce the power level of the RF source if necessary or add attenuators prior to
the mixers or the analyzer inputs.
Sensitivity
Now, determine the sensitivity required of the PNA network analyzer.
Sensitivity = P
REF
– DR – S/N
Where DR = Required dynamic range
S/N = Signal-to-noise ratio calculated previously
With this sensitivity number, select an analyzer from Table 1 that meets your
measurement needs.
1. Refer to Table 10 in the “ Antenna measurement
components catalog” section on page 52 for
mixer conversion loss.