Next Power Tuning system RT-900
Added 2025-04-27 20:34:54 +0000 UTCThe output power of the RT-900 especially on UHF is all over the place. For that reason power tuning is going to have to take a different approach. You will have noticed the PA Gain 1 and PA Gain 2 settings in the menu, there will have to be three more so in total there will be 5 power tuning menu options.
PA Gain 1
PA Gain 2
Low Threshold (lowest TX Power setting, usually around 120 ish)
High Threshold (Highest TX Power setting, usually around 220)
High Threshold Watts (The output power in watts for the high threshold)
The idea is these 5 settings tune a 5 MHz band slot. Such as for example:
140-145
430-435
465-470
The radio will store these settings alongside each 5MHz band slot, if one does not exist for the slot you are in, the closest one will be used. For example using the above, if you tuned to 445 MHz the settings for the 430-435 slot will be used. These settings will also be in the SPI app as well for mass manipulation.
This is kind of a complex situation, so I will be making a video explaining exactly how to set the band slots, most of the time only a few slots will be required to be set and hopefully the default will be okay for most.
I am in the middle of implementing this, it is very difficult so please bear with me.
