--- /dev/null
+[ ] Goals
+ [ ] Demonstrate TDMA repeater
+ [ ] superior weak signal performance (-135dBm)
+ [ ] diversity to handle multipath
+ [ ] wideband audio
+ [ ] high bit rate data
+ [ ] low cost
+ [ ] Full SDR so we can define waveform
+ [ ] SSB up and down converters to allow full waveform control
+ [ ] no SoCs
+
+[ ] Doc
+ [ ] Block diagram
+ [ ] Uses cases in paragraph form
+ [ ] Gain, NF, IP3 budget spreadsheet
+ [ ] Power supply budget spreadsheet
+
+[ ] RF Specs
+ + these are targets, main goals are functional, leave
+ others to get sparkling RF performance
+ [ ] spurious tx emissions -45dBC @ 1W
+ [ ] IP3 10dBm
+ [ ] Blocking 95dB
+ [ ] System NF 2dB
+ [ ] ACS 50dB,
+ [ ] MDS (1200Hz) -135dBm,
+ [ ] Tx phase noise -124dBc/Hz ??
+
+[ ] Parts Selection
+ [ ] New audio amp chip
+ + bit better, higher power than LM386
+ [ ] should we add a LCD?
+ + how would this be used?
+ [ ] General purpose VHF transistors
+ [X] 1st mixer: ADE-1
+ [ ] RF switches
+ [ ] 1W PA transistor
+ [ ] LCD
+ [ ] encoder
+ [ ] first LO: Si5351
+ + also 2nd LO
+ [ ] optional Si570
+ + low phase noise soldered in option, provide footprint
+ + Si5351 still used as 2nd LO
+ [ ] how to select Si570?
+ + jumper 0hm resistor?
+
+[ ] Use Cases
+ [ ] VHF FM radio
+ [ ] Open Source VHF DV radio
+ [ ] Low MDS
+ [ ] TDMA Repeater
+ [ ] Setting frequencu and mode
+ + how to select frequency? What combinations of buttons
+ and encoder.
+ + do we need a full 0-9 keyboard?
+ + should we use a PC or remote device as primary input device
+ + does position of buttons/encoders/style of buttons make it easy
+ to use, e.g. set a frequency
+ [ ] Chnaging waveform
+
+[ ] Software Modules
+ [ ] VHF Modem
+ [ ] VHF protocol
+ [ ] TDMA framework around modem, burst modem
+ [ ] New Drivers
+ [ ] LCD
+ [ ] Encoder
+ [ ] Si570
+ [ ] Si5351
+ [ ] UI for setting a frequency
+ [ ] USB console
+
+[ ] Risks
+ + and experiments/tasks/prototypes to mitigate
+ [ ] DAC and ADC tied together
+ + demo tx/rx switching using this approach
+ [ ] Can we use ADE-1 bir-directional?
+ + what about diplexor?
+ [ ] Investigate use of other mixers
+ + but doesnt have to be perfect?
+ [ ] Celestra mixer
+ [ ] Glens
+ [ ] coupled res in shielded box or cots part?
+ [ ] how to swithc mixer/xtal filter
+ [ ] what else wcould er use instead of NE602?
+
+[ ] PCB layout
+ [ ] where do we put shilds
+ [ ] how to fabricate?
+++ /dev/null
-[ ] Goals
- [ ] Demonstrate TDMA repeater
- [ ] superior weak signal performance (-135dBm)
- [ ] diversity to handle multipath
- [ ] wideband audio
- [ ] high bit rate data
- [ ] low cost
- [ ] Full SDR so we can define waveform
- [ ] SSB up and down converters to allow full waveform control
- [ ] no SoCs
-
-[ ] Doc
- [ ] Block diagram
- [ ] Uses cases in paragraph form
- [ ] Gain, NF, IP3 budget spreadsheet
- [ ] Power supply budget spreadsheet
-
-[ ] RF Specs
- + these are targets, main goals are functional, leave
- others to get sparkling RF performance
- [ ] spurious tx emissions -45dBC @ 1W
- [ ] IP3 10dBm
- [ ] Blocking 95dB
- [ ] System NF 2dB
- [ ] ACS 50dB,
- [ ] MDS (1200Hz) -135dBm,
- [ ] Tx phase noise -124dBc/Hz ??
-
-[ ] Parts Selection
- [ ] New audio amp chip
- + bit better, higher power than LM386
- [ ] should we add a LCD?
- + how would this be used?
- [ ] General purpose VHF transistors
- [X] 1st mixer: ADE-1
- [ ] RF switches
- [ ] 1W PA transistor
- [ ] LCD
- [ ] encoder
- [ ] first LO: Si5351
- + also 2nd LO
- [ ] optional Si570
- + low phase noise soldered in option, provide footprint
- + Si5351 still used as 2nd LO
- [ ] how to select Si570?
- + jumper 0hm resistor?
-
-[ ] Use Cases
- [ ] VHF FM radio
- [ ] Open Source VHF DV radio
- [ ] Low MDS
- [ ] TDMA Repeater
- [ ] Setting frequencu and mode
- + how to select frequency? What combinations of buttons
- and encoder.
- + do we need a full 0-9 keyboard?
- + should we use a PC or remote device as primary input device
- + does position of buttons/encoders/style of buttons make it easy
- to use, e.g. set a frequency
- [ ] Chnaging waveform
-
-[ ] Software Modules
- [ ] VHF Modem
- [ ] VHF protocol
- [ ] TDMA framework around modem, burst modem
- [ ] New Drivers
- [ ] LCD
- [ ] Encoder
- [ ] Si570
- [ ] Si5351
- [ ] UI for setting a frequency
- [ ] USB console
-
-[ ] Risks
- + and experiments/tasks/prototypes to mitigate
- [ ] DAC and ADC tied together
- + demo tx/rx switching using this approach
- [ ] Can we use ADE-1 bir-directional?
- + what about diplexor?
- [ ] Investigate use of other mixers
- + but doesnt have to be perfect?
- [ ] Celestra mixer
- [ ] Glens
- [ ] coupled res in shielded box or cots part?
- [ ] how to swithc mixer/xtal filter
- [ ] what else wcould er use instead of NE602?
-
-[ ] PCB layout
- [ ] where do we put shilds
- [ ] how to fabricate?