From: rickb44 Date: Thu, 4 Sep 2014 14:50:03 +0000 (+0000) Subject: Updated Change-Log.txt format RGB X-Git-Url: http://git.whiteaudio.com/gitweb/?a=commitdiff_plain;h=da66c79ec189ed27daab6e11c90161ec8527ac10;p=freetel-svn-tracking.git Updated Change-Log.txt format RGB git-svn-id: https://svn.code.sf.net/p/freetel/code@1826 01035d8c-6547-0410-b346-abe4f91aad63 --- diff --git a/smartmic/SM1000-C/Change-Log-C.txt b/smartmic/SM1000-C/Change-Log-C.txt index 24fd2281..4bae5a14 100644 --- a/smartmic/SM1000-C/Change-Log-C.txt +++ b/smartmic/SM1000-C/Change-Log-C.txt @@ -101,7 +101,7 @@ Changes 07/22/2014 Reformatted file to fit on Schematic. 20. [X] Added item numbers to this file to facilitate communication. RGB 07/15/2014 -Latest change notes David 14 August +========= Latest change notes David 14 August ========== 21. [X] R46 to 100k [ ] add series R to prevent DAC distortion? @@ -114,60 +114,88 @@ Latest change notes David 14 August 23. [X] R52 1k trimmer wasn't on my digikey order + probably my mistake, but check BOM Is in BOM RGB -[ ] C36 is along way away from U6 + +24. [ ] C36 is along way away from U6 + poss to move closer? -[ ] Mic DC bias v low, about 0.3V + +25. [ ] Mic DC bias v low, about 0.3V + should we change R39? -[ ] Idea - clear labels next to each trimmers in large font + +26. [ ] Idea - clear labels next to each trimmers in large font + and connectors and TP, hard to see with naked eye -[ ] foot print for a small reset button + +27. [ ] foot print for a small reset button + I press it a lot, gd for experimenting -[ ] 1nF to filter noise across 500k R42 but very close to op-amp -[ ] highly senstive net between R53 and R42 should be shorter if possible, + +28. [ ] 1nF to filter noise across 500k R42 but very close to op-amp + +29. [ ] highly senstive net between R53 and R42 should be shorter if possible, as we are getting a lot of noise pick up. -[ ] Move ADC power supply bypass network v close to pins 21/22 U1B and + +30. [ ] Move ADC power supply bypass network v close to pins 21/22 U1B and away from switcher + as per Discovery board -[ ] route op-amp bypass caps directly to op amp power supply pins on same layer, place nearby + +31. [ ] route op-amp bypass caps directly to op amp power supply pins on same layer, place nearby -[ ] Idea - clear labels next to each trimmers in large font +32. [ ] Idea - clear labels next to each trimmers in large font + and connectors -[ ] foot print for a small reset button + +31. [ ] foot print for a small reset button + I press it a lot, gd for experimenting -[ ] Matt - PCB review + manufacture +32. [ ] Matt - PCB review + manufacture -[ ] Modem appears to be losing sync on time slips +33. [ ] Modem appears to be losing sync on time slips + investigate this in simulation form -[ ] check trimmers all go the same way around -[ ] connect C36 to + term of U6, delete R43 -[ ] some gain on U6 a good idea? + +34. [ ] check trimmers all go the same way around + +35. [ ] connect C36 to + term of U6, delete R43 + +36. [ ] some gain on U6 a good idea? + laptop audio ouput just a few 100mVpp + at least put in resistors. -[ ] very big robust pads for R46 + +37. [ ] very big robust pads for R46 + pot keeps falling off, breaking pads -[ ] Consider case made from PCB, like sniffers + +38. [ ] Consider case made from PCB, like sniffers + can get all holes drilled + gd RF shielding -[ ] should square pad on Mic be gnd side? -[ ] added 3n9 between U8 p3 and ground + +39. [ ] should square pad on Mic be gnd side? + +40. [ ] added 3n9 between U8 p3 and ground + removed some tonal noise and -[ ] changed R39 to 2k2 + +41. [ ] changed R39 to 2k2 + mic bias now 2.8V -[ ] Switcher noise reduction idea + +42. [ ] Switcher noise reduction idea + is there away to lock the switcher osc to a uC clock? + we could make it a multiple of ADC/DAC sample rate + thus aliasing all noise down to 0 Hz + need swicther to freerun until uC starts -[ ] review jumpers and see if it makes mores sense to make them 0 ohm 0805s -[ ] C24 closer to U1? -[ ] C40 should be 47nF + +43. [ ] review jumpers and see if it makes mores sense to make them 0 ohm 0805s + +44. [ ] C24 closer to U1? + +45. [ ] C40 should be 47nF + David used wrong value on prototype -[ ] LD2 opto-isolator footprint wrong (or maybe I ordered wrong part) -[ ] location of C51 net label -[ ] SW1 needs bigger pads to make hand solderable + +46. [ ] LD2 opto-isolator footprint wrong (or maybe I ordered wrong part) + +47. [ ] location of C51 net label + +48. [ ] SW1 needs bigger pads to make hand solderable + is this suitable as a PTT switch? + button is quite small + locking PTT as per SW3 useful for testing (want to leave tx on) -[ ] CN12 is hard to solder manually, need larger mechanical pads + +49. [ ] CN12 is hard to solder manually, need larger mechanical pads + although this would increase the outline so maybe not a problem -[ ] CN2 difficult to hand solder, extend padds back towards outline + +50. [ ] CN2 difficult to hand solder, extend padds back towards outline + +========== ==========