BaseMod rev1 errata

[gkasprow]

From @gkasprow on September 4, 2017 19:55

• [x] replace AD8363ACPZ-WP with AD8363ACPZ-R7CT-ND
• [x] replace ADT7420UCPZ-R2 with ADT7420UCPZ-RL7TR-ND
• [x] This board has a lot of pads for potential matching components. At the frequency this AFE is designed to operate at, these are unnecessary. Please remove them from the schematic + layout to simplify things and save space (the boards are quite cramped atm).
• [x] We do not need an input path that bypasses the InAmp. Please remove these solder jumpers.
• [x] Zero-index everything (silk, schematic, panel)
• [x] Make sure that we're using the cheapest acceptable substrates. e.g. FR408 on the RF layer, FR4 everywhere else.
• [x] Should we add inductors on the +-12V to filter them (these are generated by SMPSs on Sayma and do not have LDOs on BaseMod so may contain high-frequency noise).
• [x] Add version number to schematic
• [x] Text is upside down for C4, R40, R42, C63 (although, these are being dropped from V2.0)
• [x] should probably have a power budget on the schematic like the ones for the EEMs.
• [x] Input/output connector caps should be 2*1nF on each connector. (Why are there three caps on the input SMA?)
• [x] add current limiting resistor for attenuator output

Copied from original issue: sinara-hw/sinara#269

[gkasprow]

From @sbourdeauducq on September 5, 2017 3:19

As explained in detail several times already, it would be better to have one issue for each item instead of one big errata, and use milestones and labels.

[gkasprow]

From @jbqubit on September 22, 2017 17:55

@gkasprow asked in email

To do tests of Allaki, I'd need sine wave at the DAC output. The sooner, the better. What about clocking DAC from 100MHz source?

[gkasprow]

From @jbqubit on November 16, 2017 15:40

• Allaki as-shipped to UMD do not have serial numbers. Please add serial numbers so end-users, WUT and Technosystem can track.

• back-side silkscreen double printing

• As-shipped to UMD insulating front-panel missing. @gkasprow is sending the right panel. Photo from @gkasprow below so everybody can see what this will look like.

[marmeladapk]

replace ADT7420UCPZ-R2 with ADT7420UCPZ-RL7TR-ND

Not changed in current schematics.

This board has a lot of pads for potential matching components. At the frequency this AFE is designed to operate at, these are unnecessary. Please remove them from the schematic + layout to simplify things and save space

@hartytp @jbqubit Is this still relevant?

FR408 on the RF layer, FR4 everywhere else.

FR4 is on all layers.

inductors on the +-12V

Placed on RTM.

Input/output connector caps should be 2*1nF on each connector

Now there are 2*10nF on inputs, + additional 10pF on output.

add current limiting resistor for attenuator output

@hartytp @jbqubit Is this still smth to do, or are 0 Ohm resistors on output fine for this purpose?