C/N Link Budget

These various tools are combined to produce a link budget tool with the following parameters:

• $f=$ frequency, entered either directly or using the frequency tool

• $P_{tx}=$ transmit power, entered directly, or calculated from transmit EIRP

• $G_{tx,\text{ peak }}=$ transmit peak gain, entered either directly or using the peak gain tool

• $G_{tx,rel}=$ transmit relative gain, entered either directly or using the offaxis gain tool

• $EIRP=$ transmit EIRP, either entered directly or calculated from $\mathrm{C}$ or using:

$$EIRP=P_{tx}+G_{tx,peak}+G_{tx,rel}$$

• $L_{fs}=$ free space path loss, either entered directly or using the path loss tool

• $L_{\text{other }}=$ other losses, entered directly

• $G_{rx,\text{ peak }}=$ receive peak gain entered either directly or using the peak gain tool

• $G_{rx,\text{ rel }}=$ receive relative gain, entered either directly or using the offaxis gain tool

• $C=$ receive power, either entered directly or calculated from EIRP or $C/N$ or using

$$C=EIRP-L_{fs}-L_{\text{other }}+G_{rx,\text{ peak }}+G_{rx,\text{ rel }}$$

• $N=$ receive noise, either entered directly or using the noise tool. Note that the noise tool includes the bandwidth

• Receive $C/N$, either entered directly or calculated using:

$$C=C-N$$

Note that:

• If $C$ is changed directly the $C/N,EIRP$ and transmit power fields update accordingly

• If the EIRP field is changed directly, the $C,C/N$, and transmit power fields update accordingly

• If the transmit power field is changed directly, the EIRP, $C$ and $C/N$, fields update accordingly

• If the $C/N$ field is changed directly the $C,EIRP$, and transmit fields update accordingly