Also be aware that even at -10dBm, which is well below the damage level, the TinySA may still be slightly overloaded and not give accurate results on some measurements. At least 60db of attenuation would be required for a 5W input.
An input of -25dBm or less is recommended.
73
Jeff G8HUL
________________________________________
From:
[email protected] <
[email protected]> on behalf of Gary W9TD via groups.io <w9td@...>
Sent: 11 November 2024 18:43
To:
[email protected]Subject: Re: [tinysa] Setup FM mobile VHF transceiver's deviation with VaraFM
Todd,
You need 50 dB of external attenuation to keep the level at the Ultra at -10dBm or less. You also might be able to use the supplied antenna with your radio feeding a dummy load. You cannot use the VARA modem as it will not create a single frequency tone, you need an external audio source like Audigy on your computer to generate a tone and send it through the USB to the DRA-50.
Gary
W9TD
