Path Calc - SAF 0.3-3 GHz Spectrum Compact User Manual

0.3-3 GHz SPECTRUM COMPACT (FW V5.2.6)

2.13.4 PATH CALC

The PATH CALC menu allows evaluating received signal level (RSL) in dBm. The
calculator is adapted for the 300 – 3000 MHz frequency range.
The calculated value is an estimation. For more credible result, use a
professional link planning tool.
The parameters required for the calculation are:

transmitter frequency FREQ, in MHz;

transmitter power TX PWR, in dBm;

distance between the transmitter and receiver DIST, either in kilometers or
miles;

gain of the transmitter antenna GAIN 1, in dBi;

gain of the receiver antenna GAIN 2, in dBi;

(optional) LOSSES value to account for any known additional losses e.g.
cables, rain, obstacles, in dB.
The RX LEVEL is recalculated instantly when a parameter's value is modified.
To select a parameter, tap on it once. The color of the keypad buttons shows which
numbers can be entered at the current digit position to obtain a valid parameter value
– the numbers on the
cannot be entered. If the currently entered value is valid, it is displayed in
OK button is green). If the value is not valid, it is displayed in
red). To confirm a valid value, tap the OK button or tap the selected parameter's box.
If the currently selected parameter is already correct, next/ previous parameter can
be selected by using the arrow buttons.
The frequency value can be entered with precision 0.01 MHz (10 kHz) by using the
"." on keypad. To input a value with decimal digits, first enter the full MHz's, then tap
the "." button and enter the rest of the digits. Until the value is confirmed, the digits
after the point are displayed larger. If there are no digits displayed after the point, it
means that they are zeroes.
To exit the parameter submenus, tap BACK. To exit the PATH CALC menu and return
to the TOOLS menu, tap BACK.
green buttons can be entered, the numbers on the
34
OPERATION
red buttons
green (also
red (also OK button is