Here we go... ADALM Pluto receives up to 3.8 GHz

https://www.analog.com/en/design-center/evaluation-hardware-and-software/eva...

Bernard, KC9SGV

Sent from my iPad

On Aug 21, 2019, at 10:02 PM, KC9SGV kc9sgv@gmail.com wrote:

My Octagon quad LNB for direct reception: Input: 10.7 GHz to 12.75 GHz (possibly higher) L.O. : 9.75/10.6 GHz Excellent noise ratio up to 0.1 dB Gain: 60~65 dB High frequency stability.

Now... 12.75 GHz - 9.75 GHz (L.O.) = 3 GHz Looking for an SDR dongle that can receive at 3 GHz. Does this sound correct ?

Bernard, KC9SGV

Sent from my iPad

...

On Aug 21, 2019, at 8:34 PM, Michelle Thompson via AMSAT-BB amsat-bb@amsat.org wrote:

An arrangement on Echostar9 for 1MHz of bandwidth for up to 4 years of USA+Mexico+Canada coverage is on offer for $2000 a month.

I'm putting together a grant proposal for ARRL, FEMA, and others to pay for at least year of access. I've gotten some positive feedback already. I think we can make this happen with some fundraising effort. I'm willing to provide the human resources and whatever incidental financing needs to happen to secure a grant for rental.

The main purpose of this type of system would be to enable field deployment of "legacy mode" aggregators, like the Phase 4 Ground ARAP (Amateur Radio Access Point). This is where traffic on any ham band, using FM or analog gear, is digitized by a local "collecting" repeater, and is then sent to a satellite from that repeater. FEMA and ARRL have expressed a lot of interest and support for this in the past. Phase 4 Ground needs an ARAP in order to support legacy radios.

You don't have to personally have a microwave digital uplink. The aggregator equipment does that part for you.

This is most useful for public service and emergency communications. A communications emergency is declared, someone (FEMA, Red Cross, motivated ham volunteer) drops in the aggregator, and all ham traffic it hears is sent to the satellite and then transmitted to the entire footprint.

The downlink is 12-14GHz. This is not 10GHz, but is receivable by individuals using very inexpensive gear. Traffic can be repeated over the internet.

What does this get us?

An opportunity to do all the R&D for the aggregator and get some experience with uplinks.

What do we not have?

A true ham band downlink. You can still receive the downlink yourself, or you can get it over the internet from an earth station distributor.

That's where we're at with *this* proposal.

I think it's worth it to provide a US-based way to design, deploy, test, and use real world aggregator equipment. We learn a lot about GEO comms and figure out a lot of the ins and outs.

Comment and critique welcome and encouraged.

More soon! -Michelle W5NYV _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb