Receiver's input impedance is irrelevant for sensitivity (and noise figure) measurements, which are defined in terms of the "available power" from the generator. The generator output impedance shoul
Of course it loads the generator, but nevertheless there is a good reason why RF noise and sensitivity measurements depend on the "available power" and not on the "delivered power". It's common for R
When transmitting on port one, the Orion T/R relay, which I suspect is a reed relay, must provide enough isolation to the rx on the active port to prevent swamping and damage. Perhaps it even ground
Measured data on SB1000 relay input: open circuit voltage = 12 V short circuit current = 80 mA switch-off peaks >= 230 V Voltage and current are well within Orion output capabilities. However, switch
Interesting - I use the bandstacking registers all the time on my Orion I with the latest firmware. I have them set on all bands to CW, PSK, FSK, and SSB freq and mode, and they are 100% repeatable.
There are probably at least two reasons for this. The 870's dsp is a 24 bit system; Ten Tec went with 16 bit dsp, which produces a slightly "grungy" sound at times. This is true for the Jupiter/Pegas
Ron, could you, please, try it again, taking care about following: a) exactly the same BW is used on both UCW and LCW (BW can be altered by pressing LCW/UCW); b) PBT = 0; c) the roofing filter used i
Well, some parts of Orion are not sheilded: the front panel board (encoders, buttons, LEDs) and A7 board (ADCs, DACs, processors, memories, mic amp, speaker amp, headphone amps,...). They are just hi
Orion's RX is not noisier than the rest of the bunch. On the contrary, it's noise figure is very good for an HF receiver. I've measured the following noise figures: 10.5 - 12.0 dB main RX, PREAMP on
Hi Ken Quoting from http://en.wikipedia.org/wiki/Noise_figure "...noise figure (NF) is the ratio of the output noise power of a device to the portion thereof attributable to thermal noise..." The out
Having separate offset values for RIT and XIT is an example of useless generality. It will suffice to have a single offset value used by both RIT and XIT, just like with any other radio. 73, Sinisa Y
This won't work on Orion. Switching from UCW to LCW will not make any difference in attenuation of unwanted signals. Only the audio frequencies will change. Page 15 of the Orion 565 manual contains a