This section has a set of radio and radio performance calculations.

Enter the inputs Temperature in Kelvin, Bandwidth in Hz, ENR (Excess Noise Ratio) of Source in dB, Pre-Amp Gain in dB the Radio Noise Figure in dBF and the Radio Gain in dB and press “Calculate” to get the Radio Output Power in dBm per Hz. Press “Clear” to clear the coefficients and begin over. Press the “Close” button to quit the screen and go back to main menu. The temperature defaults to 290K (room temp 27C) some of the other parameters such as bandwidth also default to help prevent errors in the calculation caused by blanks or zeros.

Figure 123 – Radio Rcvr Noise Power

Enter the inputs Temperature in Kelvin, Bandwidth in Hz,
the Radio Noise Figure in dBF and the Radio 2^{nd} and/or the 3^{rd}
order IMD or Inter-Modulation in Output Power dBm and press “Calculate” to
get the ^{nd} and/or 3^{rd} order products.
Press “Clear” to clear the coefficients and begin over. Press the
“Close” button to quit the screen and go back to main menu.
The temperature defaults to 290K (room temp 27C) some of the other
parameters such as bandwidth also default to help prevent errors in the
calculation caused by blanks or zeros.

Figure
124
– Radio Spurious Free

Enter the inputs Temperature in Kelvin, Bandwidth in Hz,
the Radio Noise Figure in dBF and the Radio Input Signal and Input Noise Level
in dBm and Press **Calculate** to compute
and display. **Clear** to reset and
reenter value to retry and **Close** to
Quit. The temperature defaults to
290K (room temp 27C) some of the other parameters such as bandwidth also default
to help prevent errors in the calculation caused by blanks or zeros.

Enter the Radio EVm performance in units of dB, V Ratio (or Linear), or percent and press the associated “Calculate” button and the other EVM formats are calculated.

Figure 125 – Radio Minimum Detectable Signal and EVM conversion

This calculation used to calculate Noise Figure from the
Receive Signal Level, the bandwidth of the measurement and the EVM of the radio.
Enter the values and press **Calculate**
and it will calculate the Noise Figure in dBF units.

Figure 126 – Radio EVM to NF conversion

Enter the inputs Eb/No (energy of
data by Noise power) in dB, Bandwidth in Hz, the Radio Data Rate in MB/Sec and
press **Calculate** to get the Carrier to
Noise ratio in dB. **Clear**
to reset and reenter value to retry and **Close**
to Quit. The
temperature defaults to 290K (room temp 27C) some of the other parameters such
as bandwidth also default to help prevent errors in the calculation caused by
blanks or zeros.

Enter the inputs Temperature in
Kelvin, Bandwidth in Hz, the Radio Noise Figure in dBF and the Radio Input
Signal in dBm and press “Calculate” to get the Carrier to Noise ratio in dB.
This function can be worked the other direction as well enter C/N and get
RSL. Press “Clear” to clear the coefficients and begin over. Press the
“Close” button to quit the screen and go back to main menu.
The temperature defaults to 290K (room temp 27C) some of the other
parameters such as bandwidth also default to help prevent errors in the
calculation caused by blanks or zeros.

Figure 127 – Radio Carrier/Noise Calculations

Enter the inputs Input Power in
dBm, and the Gain in dB, Noise Figure in dBF and Third Order Intermodulation in
dBm of the stages in the Radio and press **Calculate**
to get the Total Gain in dB, Total Noise Figure in dBF and Total Intermod dBm.
This function can be worked the other direction as well enter C/N and get
RSL. **Clear** to reset and reenter value to retry and **Close** to Quit.

Figure 128 – Radio Cascade Calculation

Enter the Mid-Band Frequency of
operation in MHz, the Loading Factor (capacitive end loading), the Length to
Diameter ratio approximation and press “Calculate” to get the Antenna Factor
and the Antenna Lengths for Quarter and Half Wavelengths in ft, cm and Meters.
Press **Clear** to clear the coefficients and begin over. Press the **Close**
button to quit the screen and go back to main menu.

Figure 129 - Radio Antenna Calculations

Enter the inputs of Transmitter
Power in dBm, Transmitter (source) match in dB, System Return Loss (Noise Level)
in dB, Antenna (Load) Match in dB and the Transmitter to Antenna Cable Loss in
dB and press **Calculate** to get the
Corrected Transmit Power dBm. Add
the variable for Antenna Gain and it computes the EIRP Effective Isotropic
Radiated Power. Finally enter the Distance to receiver or measurement point and
calculate the Power Density. Press **Clear** to clear the coefficients and begin over. Press the **Close**
button to quit the screen and go back to main menu.

Figure 130 – Radio Effective Radiated Power Calculations

Enter the frequency in MHz and
the Distance to get the Path Loss for Isotropic Atmospheric Loss in dB. In
addition, the user can input the Power Transmitted (Xmit) and the Power Received
both in dBm. Press **Calculate** to get
the Path Loss in dB for either or both calculations.
**Clear** to reset and
reenter value to retry and **Close** to
Quit..

Figure 131 – Radio Radiative Path Loss

Enter any two values to compute the third. In this case a
FM Carrier Deviation of 10KHz and an Modulating Signal Bandwidth of 3 KHz gives
a Modulation Index of 3.333. Press **Calculate**
to compute, **Close** to quit and **Clear**
to clear the value to retry.

Figure 132 - Modulation Index Specs

Enter any two values to compute the third. In this case a
FM Carrier Deviation of 10KHz and an Modulating Signal Bandwidth of 3 KHz gives
a Modulation Index of 3.333. Press **Calculate**
to compute, **Close** to quit and **Clear**
to clear the value to retry.

Figure 133 – Modulation FM Mod Index

Enter any two values to compute the third. In this case a
FM Carrier Deviation of 200Hz and an IF Bandwidth of 5 KHz gives a Modulating
frequency of 1150Hz. Press **Calculate**
to compute, **Close** to quit and **Clear**
to clear the value to retry.

Figure 134 – FM Bw to IF Bw