oresat oresat-c3-hardware issues

oresat / oresat-c3-hardware

C3 (Command, Communication, and Control) our Command and Data Handling (C&DH) card.

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issues

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Investigate Octavo not booting up on every power reset

#68 andrewgreenberg opened 6 months ago
0
Consider a new UHF transmit PA device

#67 glennl opened 6 months ago
1
Provide UHF transmit TOT adjustable values

#66 glennl opened 6 months ago
0
Rework UHF transmit power annotations

#65 glennl closed 4 months ago
1
OK to change R109 to 22k?

#64 andrewgreenberg closed 8 months ago
1
Make R110 NP

#63 andrewgreenberg closed 8 months ago
0
UHF TX 5th order LPF dropping 6 dBm

#62 andrewgreenberg closed 8 months ago
2
RXTX switch U20 needs better EN/CTRL voltages

#61 andrewgreenberg closed 8 months ago
2
Add AX5043 testing test points and feedback on UHF radio

#60 andrewgreenberg closed 7 months ago
1
Fix brown out on radio enable

#59 andrewgreenberg closed 7 months ago
2
Are the 220 uF Tantalums for the watchdog sealed?

#58 andrewgreenberg opened 11 months ago
0
U34 I_LIM could go to A8 ADC to monitor current consumption

#57 andrewgreenberg opened 11 months ago
0
Move components away from +/- Y edges to enable placement under frame bosses

#56 andrewgreenberg closed 3 months ago
2
BOM optimization

#55 andrewgreenberg opened 11 months ago
0
Replace UHF discrete transistor LNA with MMIC

#54 glennl closed 1 year ago
1
Replace 3rd order BPF following LNA with SAW

#53 glennl closed 1 year ago
2
Add specialized RF test points for easy probing

#52 andrewgreenberg closed 11 months ago
2
Rename UHF receive test point nearest AX5043 to RFTP-9

#51 glennl closed 1 year ago
1
UHF receive sensitive is 15 db down from expected

#50 andrewgreenberg closed 11 months ago
1
Update Readme page

#49 glennl closed 1 year ago
1
Investigate AX5043 RX/TX matching circuit at UHF radio

#48 zisi closed 11 months ago
3
Important: Add PCB inductance between Q7 emitter and ground

#47 glennl closed 1 year ago
2
Move to v2 backplane (power connections, and UART to backplane)

#46 andrewgreenberg closed 11 months ago
4
Remove GPS extractor and GPS L1 output

#45 andrewgreenberg closed 1 year ago
1
Increase inductance to ground on Q7's emitter pins

#44 andrewgreenberg closed 1 year ago
1
Change R50 to 120 ohms

#43 andrewgreenberg closed 1 year ago
1
Changes for Ver-6

#42 glennl closed 2 years ago
1
Switch PA thermistor to 0603

#41 andrewgreenberg closed 1 year ago
1
Add 10uF to VBUSP

#40 oliver-rew closed 1 year ago
2
UHF_ILIM should go to an ADC input on the M4

#39 andrewgreenberg closed 1 year ago
2
v5 WDT circuit wrong

#38 andrewgreenberg closed 1 year ago
2
Allow the M4 to power cycle the L band radio.

#37 andrewgreenberg closed 11 months ago
2
Add UHF reverse power detector test point

#36 glennl closed 1 year ago
1
U15 (Qorvo/Triquint 856930) is obsolete and isn't in stock anywhere

#35 andrewgreenberg opened 3 years ago
2
UHF Transmitter TOT circuit title block name change (trivial)

#34 glennl closed 3 years ago
0
Title box on L band AX5043 change (trivial)

#33 glennl closed 3 years ago
0
Unneeded PWRAMP net on L band

#32 glennl closed 3 years ago
0
Unneeded Tx components on L band transceiver

#31 glennl closed 3 years ago
0
TOT has pins switched

#30 andrewgreenberg closed 3 years ago
1
eMMC SDIO line pullup resistors should be on the emmc_vdd, not on 3.3V

#29 andrewgreenberg closed 3 years ago
1
M4_PA_ENABLE and !M4_LNA_ENABLE need pull down / pull up respectively

#28 andrewgreenberg closed 3 years ago
2
Maybe: add a solder-on shield box for the L band LNA

#27 andrewgreenberg closed 3 years ago
1
Add fiducials :/

#26 andrewgreenberg closed 3 years ago
0
RF Log amps optional LPFs

#25 glennl closed 3 years ago
1
RT1 Thermister needs to be re-wired

#24 glennl closed 3 years ago
1
Values for TOT times LATCH and L_ON need to be determined

#23 glennl closed 3 years ago
1
5th order LPF between AX5043 SE output and PA needed

#22 glennl closed 3 years ago
5
Thermal of U30 needs to be confirmed to clearly go to the right edge of the PCB

#21 glennl closed 3 years ago
1
Unused gates of IC1 and IC3 need inputs terminated

#20 glennl closed 3 years ago
1
Resolve 5V_U airwire

#19 glennl closed 3 years ago
1