[TowerTalk] Receiver protectors and intermod, harmonics, etc.

[Michael Tope]

On 7/3/2015 12:46 PM, Pete Smith N4ZR wrote:
> Do the DX Engineering RG-5000 device, or the AS-RXFEP from Array 
> Solutions) behave nicely when hit with a signal well above their 
> protection threshold, or dothey generate interference (noise, 
> harmonics, intermod) from the energy that is blocked?
>
> Our particular application is for the RBN, involving a QS1R receiver 
> very close to the antennas of an HF ionospheric radar operating on a 
> couple of discrete frequency bands in the 8-18 MHz range with about 1 
> KW input (don't know what the EIRP would be at the location of the 
> receiver).
>
> Dx Engineering says their version offers "far lower harmonic and noise 
> products across the spectrum than any competing RX front-end saving 
> device,"  Would sure like to hear some impartial confirmation.
>
Pete,

Do you have any information on the characteristics of the transmitted 
radar waveform (i.e. is it pulsed or FM-CW; if pulsed, what is the pulse 
width and pulse repetition frequency?).

73, Mike W4EF...........