From: drowe67 Date: Sun, 27 Dec 2015 19:50:28 +0000 (+0000) Subject: updated task list X-Git-Url: http://git.whiteaudio.com/gitweb/?a=commitdiff_plain;h=3d965533bb88b6755fc4b8512a698338fdf29ece;p=freetel-svn-tracking.git updated task list git-svn-id: https://svn.code.sf.net/p/freetel/code@2576 01035d8c-6547-0410-b346-abe4f91aad63 --- diff --git a/sm2000/doc/sm202 Task List.txt b/sm2000/doc/sm202 Task List.txt index c20f0930..aa8824ac 100644 --- a/sm2000/doc/sm202 Task List.txt +++ b/sm2000/doc/sm202 Task List.txt @@ -75,10 +75,10 @@ Task List [ ] Remaining Manhatten Prototype Tasks + Manhatten Style prototype used to build and test as much as possible - [ ] 1W PA - [ ] PIN diode TR switch - [ ] PA filter - [ ] Input (1st) BPF + [X] 1W PA + [X] PIN diode TR switch + [X] PA filter + [X] Input (1st) BPF [ ] TDMA switching [ ] how to switch PS rails [ ] tx and rx meet specs @@ -88,12 +88,12 @@ Task List + cross off below when part selected and tested in prototype [ ] New audio amp chip + bit better, higher power than LM386 - [ ] General purpose VHF transistors - [ ] General purpose IF transistors + [X] General purpose VHF transistors + [X] General purpose IF transistors [X] 1st mixer: ADE-1 [X] RF switches + Brady has suggest AS17992LF - [ ] 1W PA transistor + [X] 1W PA transistor [ ] LCD + Could use cheap Nokia 5110, at least in first rev. Well documented and libraried. [ ] encoder @@ -102,7 +102,7 @@ Task List [X] optional Si570 + low phase noise soldered in option, provide footprint + Si5351 still used as 2nd LO - [ ] Prototype parts list to Edwin for review + [X] Prototype parts list to Edwin for review + just major parts, semiconductors + make sure they are obtainable + look for low cost equivalents @@ -184,7 +184,7 @@ Task List [X] how to switch mixer/xtal filter + tx modulator transistor is part of rx load + alo use of TIA - [ ] Is NE602/612 still easy to get? + [X] Is NE602/612 still easy to get? [X] ADC perf + SFDR etc, which is why we run it as 100kHz + if not good enough we'll need an external ADC @@ -194,12 +194,13 @@ Task List + easy to exceed limits in SM resistors and transistors + RF drivers draw lots of current + mitigation: power spereadhseet in doc section - [ ] IF termination of 1st mixer - + how to test if this is OK? - [ ] do we need a way to bypass the LNA? + [X] IF termination of 1st mixer + + how to test if this is OK -> Sweep with R/L bridge + [X] do we need a way to bypass the LNA? + or is it OK even with strong signals + mitigation: cascaded IP3 calculations in doc section if this compares to current middle range radios then OK + + decided to keep in cct, pending strong sig tests [ ] xtal filter power + what is the limit, how many dBm are we using at the moment? [X] prototype RX works @@ -211,11 +212,12 @@ Task List [ ] TDMA switching + demonstrate design supports tx/rx switching fast enough for TDMA [ ] tx/rx power supply rail swicthing - [ ] RF detector + [X] RF detector + pwr calibration, shutdown with no load - [ ] PA - [ ] 1W for 5 minutes - [ ] adjust PA from uC via Vgg + [X] PA + [X] 1W for 5 minutes + [X] adjust PA from uC via Vgg + + not tested from uC yet [ ] Dual freq TDMA + tx and rx? We need a way to tx on two different freqs + use same clock for tx and rx? @@ -232,15 +234,15 @@ Task List + e.g. on collectors and emitters of RF amps + between building blocks [ ] inductors - [ ] coil winding details if air core - [ ] tolerance - [ ] statement on Q so we know if we can subs SM or need Hi-Q air-core - [ ] alignment of coils WRT each other to prevent coupling + [X] coil winding details if air core + [X] tolerance + [X] statement on Q so we know if we can subs SM or need Hi-Q air-core + [X] alignment of coils WRT each other to prevent coupling [ ] location of shields if rqd [ ] how to adjust/if adjustment rqd + e.g. adjust filter by variation in coild spacing against filter spec [ ] 4 by 0.1 inch pin headers in a square pattern to disconnect building blocks - [ ] select Si570 with a jumper + [X] select Si570 with a jumper [ ] review of foot prints for discretes + ease of debug, e.g. if we need to add a LC filter + power handling @@ -249,9 +251,10 @@ Task List [ ] specify locations of 4 pin 50 ohm breaks + 0805 0 ohm, or break for isolation and testing [ ] 10uF tant to PA - [ ] research TXCO for si5351 clock input + [X] research TXCO for si5351 clock input + perhaps include as option + does it have to be 25MHz? + + decided not to run with TXCO for prototype, as freq stab not critical [ ] how to connect SCA/SCL on clock chips to uC? + is there a separate enable? [ ] LEDs for control signals/rails