Aluminium provides more than adequate shielding against both magnetic and electric fields at shortwave frequencies. But plastics do not, and Orion's CPU, DSP's, AD and DA converters, front panel LEDs
At 60 Hz or audio frequencies aluminium is not effective in shielding against magnetic fields. However, at radio frequencies it works very well, provided that the circuit to be protected is completel
The length of Orion's DSP filters is insufficient for bandwidths below ~300 Hz, and ruins performance below ~180 Hz. There are probably also some computation inaccuracies. The 100 Hz DSP filter is a
Any S meter indication above S-0 simply means that the automatic gain control has reduced receiver's gain, usually resulting in reduced sensitivity and degraded RX noise figure. This simple fact is f
AUX RX (if selected) stays connected to RX input during transmissions. Board A3 (RF Converter) has a pair of antiparallel diodes that will protect main RX, at least until they get destroyed. It would
Assuming that you didn't get a defective unit, try increasing AGC Threshold in RX menu. Forget about NR at least until you get a decent copy withou it. More details in: http://www.geocities.com/va3tt
Yes and no, depends on noise. For the "background" type of noise use hand time > 0 and slow decay. For strong impulse noise and strong atmospheric crashes using zero hang time and fast decay in order
A pair of steady carriers is equivalent to a DSB signal, i.e. resulting amplitude is not constant at all. Fast AGC tries to reduce the apparent depth of modulation, resulting in distortion. 73, Sinis
All the mess is created by attempting to feed 6 destinations (speaker, headphones, 3 aux outputs) from just 3 sources (3 DACs). Therefore, aux outputs cannot be independent from speaker/headphone out
I did some measurements recently and it seems that SWEEP hardware takes a single 4 ms sample every 2 seconds. This represents 0.2 % chance of hitting upon a short (intermittent) signal, and 99.8 % ch