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Feature Creep
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Bryan Hoyer <bhhoyer@...>
Transmit testing is well underway and I have begun the board spin to prototype II, in parallel with receiver characterization.
In the process I have added a small housekeeping processor to the radio card, because a PIC with A/D and PWM was cheaper than using discrete ICs. We have planned the following capabilities but I'm open to other functions provided they meet cost goals. Please be specific as to what function you would like to see rather than just asking for a bunch of inputs/outputs. Telemetry applications can be met with USB I/O so let's focus on core radio functionality. You have Santa's ear, Bryan Planned Functionality: ADC Forward RF PWR Reflected RF PWR PS Voltage PA Temp PWM PA Gate Voltage Digital IO 12V Fan Output TX inhibit Input Open Collector Synthesizer Lock Input Red/Green TX/RX LED Serial Interface to Main CPU Set Monitor All Values EEPROM for Calibration Values SW Control Functions: PA Temp * Fan on at PA>60C * PA rollback at PA>80C TX inhibit * This will allow colocation of the UDR at a site with a 440 Voice Repeater TX Faults RED Blinking LED * Hi Reflected Power * Loss of Lock PS Low Voltage
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Phillip Frost <indigo@...>
Phase coherence with attached units would be pretty awesome. Use case: software-defined goniometer.
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Peter mcCorison <peter@...>
For finite delivery time, features must creep slower than development.
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- Peter, K2SPR
On Dec 3, 2013, at 8:05 AM, Bryan Hoyer <bhhoyer@...> wrote:
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Tom Hayward <esarfl@...>
On Tue, Dec 3, 2013 at 8:05 AM, Bryan Hoyer <bhhoyer@...> wrote:
TX inhibitI see the TX inhibit input, but not the TX active output. Say I put two of these at a site. How do I keep them from TXing at the same time? You use the colocated voice repeater example... maybe I want to disable my repeater while the data radio is transmitting, not the other way around :-) What really excites me about a data radio like this is sampling the receiver directly. I don't care if you implement any protocols before selling it to me; I just want the SDR. I'm one of the guys who checked the "Linux experimenter" box. Will you add the receiver sampling specs to the datasheet? Tom KD7LXL
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Marshall Denny <MarshallDenny@...>
Receive signal strength. As part of a Signal Quality that includes BER and any other measurement of signal quality available based on demodulation.--
Respectfully,
W. Marshall Denny II Software Development Engineer 206 734 9242 cell Far and away the best prize that life has to offer is the chance to work hard at work worth doing.
Theodore Roosevelt
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"John D. Hays" <john@...>
These type of signals are what Bryan is looking for -- I would just add that the UDR also runs in the 430 band, so they can have significant separation (in frequency domain) from repeater receivers (and transmitters). E.g. if it is colocated on a site with a 444.9+ repeater [receiver at 449.9] and runs at 433.9, that is 16 mHz from the receiver and 11 mHz from the transmitter of the repeater. 2-3X the separation of the typical duplex pair.
[Please don't jump all over the use of particular frequencies, they are simply for illustration purposes.]
John D. Hays K7VE PO Box 1223, Edmonds, WA 98020-1223   
On Tue, Dec 3, 2013 at 9:31 AM, Tom Hayward <esarfl@...> wrote:
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Mathison Ott <mathisono@...>
I second the software-defined goniometer. 73 Mathison
On Tue, Dec 3, 2013 at 9:48 AM, Marshall Denny <MarshallDenny@...> wrote:
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"John D. Hays" <john@...>
Providing BER and RSSI are already in the plan, as well as socket access I/Q, modems, etc. -- The rest appears to be an application? This is an open design radio, developers are free to experiment with various applications. NW Digital Radio will provide the platform and a few applications, other applications will come from the community. John D. Hays K7VE PO Box 1223, Edmonds, WA 98020-1223
On Tue, Dec 3, 2013 at 12:08 PM, Mathison Ott <mathisono@...> wrote:
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bhhoyer@...
Philip, the UDR has a 25MHz Master TCXO Clock Are you asking for an external clock option to drive multiple UDRs from a common Clock? Bryan
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Phillip Frost <indigo@...>
On Dec 3, 2013, at 4:01 PM, <bhhoyer@...> wrote:
the UDR has a 25MHz Master TCXO ClockYes, precisely. If you can synchronize the phase of all the mixers and DACs and ADCs of a number of UDRs, each connected to a separate antenna, then you can do all sorts of neat spatial processing in software. What you have is an antenna array, but the phasing of the antennas is software controllable. You might call it MIMO, or beam forming, or spatial filtering, or field recording, depending on precisely what processing you are doing, and in what industry you are. I'm not normally a fan of feature creep, but since this is something that requires hardware support, I thought it might be worth mentioning now. I imagine all the software that does the neat stuff can be implemented later, as long as the hardware has the necessary bolts, which is just phase coherence among multiple antennas.
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Bryan Hoyer <bhhoyer@...>
Philip,
I'm going to add External Clock as an unstuffed, untested, unsupported and consequently no-cost option. I think it has merit and the elves seem to like it, Santa
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Bryan Hoyer <bhhoyer@...>
Tom,
COR... DOH! and done, Santa
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Brian D Heaton <ky9k-lists@...>
- Ability to lock at least the RF board to a 10MHz external reference (that may be the "synthesizer lock input" mentioned below).
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73-KY9K/Brian
On 12/3/2013 8:05 AM, Bryan Hoyer wrote:
Transmit testing is well underway and I have begun the board spin to prototype II, in parallel with receiver characterization.
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Steve Stroh N8GNJ <steve.n8gnj@...>
Many fans now have an output so the system can monitor if they die /
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clog / jam. How about an input for such a feature on the fan. Hey, wait, I thought there wasn't going to be a fan (the massive heat sink)? Thanks, Steve
On Tue, Dec 3, 2013 at 8:05 AM, Bryan Hoyer <bhhoyer@...> wrote:
Transmit testing is well underway and I have begun the board spin to prototype II, in parallel with receiver characterization.
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