Chapter 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 Version 1.11
by Kirt Blattenberger
RF Cafe Website
(www.rfcafe.com) 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. |
10-9 to < High
Low< to 1012
| | Frequency Units |
| Table 2 System Input Parameters - "Filter-Mixer" | Chapter 1, 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 13 | Version 1.11
by Kirt Blattenberger
RF Cafe Website
(www.rfcafe.com) | Chapter 3 |
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