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Chapter 3
3 Inband System Specification
Inband system specifications are located in the upper left region of the Inband worksheet as shown in Figure 3. A brief explanation of each parameter is given in Table 1. All cell input data is validated for correctness.
Figure 3 System Specification Input Areas - "Inband"
Parameter
Description
Range
Tolerance
Units
P[input]
Signal power level at system input
-1000 to +1000
-
dBm
Temp
System reference temperature used for noise power calculations. (-273.15 is absolute zero)
-273.14 to +1000
-
°C
Min SNR
Minimum system SNR used to calculate the dynamic range (SDR)
-100 to +100
-
dB
Use VSWR
Determines whether the interface VSWR mismatch errors are included in the cascaded Gain equation, which in turn affects every other equation in the system.
y or Y to include n or N to exclude
-
-
Table 1 System Input Parameters - "Inband"
Figure 4 System Specification Input Areas - "Filter-Mixer"
Parameter
Description
Range
Tolerance
Units
Frequency Units
Used in noise power calculations and for filter/mixer calculations. This value is used throughout the workbook for column headers and calculations.
g or G = GHz m or M = MHz k or K = kHz
-
-
Input Frequency
Defines input frequency range for filter and mixer calculations. Low: Lower input frequency High: Upper input frequency # Steps: Number of frequency steps between Low and High limits. !Important! If this number is changed, then the number of both the "Freq" columns and the "Psig" columns must be changed to match.
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Chapter 3
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