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RF record input

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Guest john user

Under what circumstances would I be better off using the "special use only" tuner inputs and why?

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The Rx special purpose port is able to provide a software‐switchable 3 VDC output to drive active antennas (such as when recording GPS), as well as providing an additonal nominal 15 dB gain on the input signal, useful for recording weak signals directly. It is also useful if recording and playback is to be accomplished at the same time without switching cables.

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The Rx special purpose port is able to provide a software‐switchable 3 VDC output to drive active antennas (such as when recording GPS), as well as providing an additonal nominal 15 dB gain on the input signal, useful for recording weak signals directly. It is also useful if recording and playback is to be accomplished at the same time without switching cables.

​All completely true -- I would also add that when using the higher gain ports (or even the normal ports), you need to take care to not saturate the front end of the system (called 'clipping') thereby actually loosing the signal you're trying to measure complete.  When saturating, the unit's tuner will bink red and the screen will also show red on the 200.  In those situations, use RX Atennuation to make the signal weaker such that it can be measured.  

Note that The WBT-2xx series has a ~60dB analog protection circuit, which in the case of overflow will kick in and protect the radio from damage.  Signals may still appear on screen (significantly lowered in power) but should not be relied upon.  

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