Hello Lyle,
So using the K3 in test mode with the main transmitter on 10m or 6m
driving a transverter at 1mW and the subreceiver fed from a downlink
transverter isn't possible? A pity since I have been using my K3 (and
K2) on the birds for quite some time but always hoped I could use it
full duplex.
FM sats may be the primary focus for North America with AMSAT-NA's FOX
series, the rest of the world is building linear transponders. (I use
both types, no need to discuss the merits of either).
73 de David VK5DG
On 18/08/2015 23:48, Lyle Johnson wrote:
The K3 is not a full-duplex radio.
At the time of the design of the K3 I was hoping we could make it a
full duplex radio with external transverters, as I was responsible for
and/or participated in the design of several subsystems in AO-40 and
other Amateur spacecraft.
The Subreceiver has its own DSP. The issue is signal isolation
between Tx and Rx and a few other
bottlenecks. Full-duplex capability would have impacted the cost and
complexity of the radio significantly, and would have been a cost
borne by all buyers of the product.
Since the initial design time of the K3, the primary focus of most
Amateur satellites has been for use with dual-band HTs using FM.
73,
Lyle KK7P
It may merit further research. The owner's manual block indicates the
Rx DSP
as "DSP2" ? ...
...
Its tempting to think maybe the sub-Rx could be used duplex with
main-Tx in the K3,...
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