[ ] Demonstrate TDMA repeater
[ ] superior weak signal performance (-135dBm)
[ ] diversity to handle multipath
+ + TDMA diversity, switch rx LO quickly?
+ + demo overcoming large fades?
[ ] wideband audio
[ ] high bit rate data
[ ] low cost
[ ] Block diagram
[ ] Uses cases in paragraph form
[ ] Gain, NF, IP3 budget spreadsheet
- [ ] Power supply budget spreadsheet
+ [ ] Power budget spreadsheet
+ [ ] Current per active device
+ [ ] Power dissiapation per active device
+ [ ] Resistor power dissiapation per active device
+ + RF bias currents can be high
[ ] RF Specs
+ these are targets, main goals are functional, leave
[ ] General purpose VHF transistors
[X] 1st mixer: ADE-1
[ ] RF switches
+ + Brady has suggest AS17992LF
[ ] 1W PA transistor
[ ] LCD
[ ] encoder
[ ] Open Source VHF DV radio
[ ] Low MDS
[ ] TDMA Repeater
- [ ] Setting frequencu and mode
+ [ ] Diversity rx
+ + use 2nd output from 5351
+ [ ] Setting frequency 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
+ [ ] Changing waveform
[ ] Software Modules
[ ] VHF Modem
[ ] VHF protocol
[ ] TDMA framework around modem, burst modem
+ [ ] diversity
[ ] New Drivers
[ ] LCD
[ ] Encoder
[ ] coupled res in shielded box or cots part?
[ ] how to swithc mixer/xtal filter
[ ] what else wcould er use instead of NE602?
+ [ ] ADC perf
+ + SFDR etc, which is why we run it as 100kHz
+ + if not good enough we'll need an external ADC
+ + test against two tone, MDS and ACR
+ [ ] Power dissipation of active devices and resistors
+ + easy to exceed limits in SM resistors and transistors
+ + RF drivers draw lots of current
+ [ ] termination of mixer
+ [ ] do we need a way to bypass the LNA?
+ + or is it OK even with strong signals
[ ] PCB layout
- [ ] where do we put shilds
- [ ] how to fabricate?
+ [ ] shields
+ [ ] where do we put sheilds
+ [ ] how to fabricate?
+ [ ] foot prints
+