73, Barry N1EU
The FLEX-6000 ADC can handle a very large amount of aggregate signal and will overload somewhere in the neighborhood of +9 dBm. When this happens you will see spurs or "images" on the panadapter. There isn't an ADC attenuator that automatically kicks in to reduce the when you approach the ADC saturation level. The AGC only operates on the recovered audio inside the RX passband filter.
With more than one slice open the preselector is disabled (WIDE). Obviously it has to be that way but good to keep in mind for FD operations.
This may be a bug..........
If you are on say .... 30 meters then open a slice for 6 meters which has +20 DB preselector engaged then change that same slice to 30 meters, both slices will then have +20 DB engaged. Then close the extra slice and +20 stays on. Doesn't seem right.
If anyone thinks this is worthwhile, I can repost it as an idea and see if it gets any votes. Sometimes it's the little things that make a difference. Thoughts?
Regards, Al / NN4ZZ
al (at) nn4zz (dot) com
Average Power at the Antenna 1500 watts
Antenna Gain in dBi 2.2 dBi. dipole
Distance to the Area of Interest 200 feet 60.96 metres
Frequency of Operation 14 MHz
Are Ground Reflections Calculated? Yes
Estimated RF Power Density 0.0137 mW/cm2. Or 137mW/m2
Conversion to dBm. +21.4 /m2
Even withe 10dB attenuation. Overload limit =. +9+19= 19dBm
Therefor ADC likely overloaded.
If this were FD then the power would be 150W max, or there is a letter to write. On our FD (VE7SAR) we calculated using the side pattern of two tri-banders with 150' separation and the numbers came close to the limit. This year we ran QRP - No problems with two on one band.