Category Archives: Application Note

EzUHF firmware v1.53 setup guide

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EzUHF firmware v1.53 adds more customisation possibilities to lower the latency throughout all the transmission chain using several techniques:

  • serial input to the Rx JR module from the remote
  • SBus output from the receiver
  • customisable number of transmitted channel
  • synchronisation of the whole transmission chain

It still supports the well tested PPM behaviour and PPM input and output and these can be used in combination with the above settings.

As the setup has more options, it gets a bit more complex to setup so that the transmitter and receiver can talk to each other.

Here is a guide to get the system set up.

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A/V Receiver Sensitivity Defined

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So just about everyone and their mother lists ‘sensitivity specs’, but try to find how they measure them… and what they mean by ‘sensitivity’.

There is no industry standard definition of receiver sensitivity, especially when it comes to analog video reception. Terms such as MOS (Minimum Operational Sensitivity), and MDS (Minimum Detectable Sensitivity), are thrown around in military circles, but exactly what they mean in our world is not clearly defined.

Just to illustrate this, here are three different definitions of sensitivity, which can vary from one extreme to the other by more than 10dB in a typical FPV A/V receiver.
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