Rev. 5 – Jun 2020 Page 58 of 91
10 ADDITIONAL MAINTENANCE
REMOVE / INSERT THE SD CARD
For some operations it is required to remove and then
reinsert the SD card. We won’t copy/paste the same pro-
cess here every time so here’s how to do that.
10.1.1 Remove the SD Card
(a) Turn off the module.
(b) Unmount it from your case removing all the screws.
(c) Unplug the module power cable.
(d) Take off the SD card from the back of the module
by pushing it (it’s a push-push mechanism).
10.1.2 Insert the SD Card
(e) Safe remove the SD card from the computer.
(f) Put the SD card back in place onto the module: if
you are looking at the back of the module, the SD
card contacts should look at you. Insert the SD card
into the SD card holder and push to retain it.
(g) Plug the module power cable.
(h) Remount it safely in your case using all the screws.
(i) You can now turn on the module.
ANALOG TRIMMING
The trimming routine is an alternative way to start the
machine, to perform, set, adjust digital trimming on any
of the CV output or input.
Each unit’s CV inputs and outputs are software calibrated to
guarantee the most precise response. For this purpose, it is
highly recommended to make a backup copy of your USTA’s
trimming le. To do so, unmount the SD card (see instruc-
tions above), connect it to your computer and copy the le
labeled trim.cfg, then place the SD card back into the mod-
ule (see instructions above). Should you lose somehow the
le on the SD card, USTA will automatically create a new
trimming le with default values, which may cause impre-
cise tracking.
To access the Trimming turn off the USTA, hold the
Play/Pause button (B.13), and turn on the USTA again.
The trimming menu will show you 32 settings for the
outputs and 4 settings for the inputs. Each output or input
needs to be set for −5V, 0V, +5V, and +10V. Scroll
through elements with the navigation encoder, push it to
start to modify the value, and push again to confirm it.
For best results, we strongly suggest warming up the
USTA at least for 30 minutes inside the case where it will
be used before performing any sort of trimming.
To perform the trimming on the outputs a multimeter
is needed. Consider also the precision of the multimeter
you are using. The USTA outputs are based on an octal
16-bit DAC, with 65’536 steps: the maximum output
without trimming is from around −5.5V up to around
+10.5V, which translates on 16V of range and an ampli-
tude difference between each step of around 0.244 mV.
To perform the trimming on the inputs, a precise volt-
age generator is needed, with the capability to generate
from at least −5.5V up to +10.5V.
To save what you did, push the play button.
When you are done, you can turn off and normally turn
on again the USTA.
PROJECT MANAGEMENT AND BACKUPS
Projects can be backed up on your computer, and it is
strongly suggested to back them up. To do so:
Turn off and unplug your case.
Remove the SD Card (follow instructions above).
Connect the SD card to the computer you want to use
for backups.
Copy/paste the project files you want to save from the
SD card root to your computer.
The project is now backed up.
Insert the SD Card (follow instructions above).
FIRMWARE UPDATE
(a) Turn off and unplug your case.
(b) Remove the SD Card (follow instructions above).
(c) Download the firmware file from
https://frap.tools/firmwares/ to your computer
(d) Connect the SD card to that computer.
(e) Rename the downloaded file as USTA.bin (keep the
extension .bin, it is important).
(f) Place the renamed file on the root of the SD card –
if there is another USTA.bin, replace it (if you have
an older install in there and you don't replace it, you
know what happens right?).
(g) Insert the SD Card (follow instructions above) and
turn on the module.
(h) Press and hold the navigation encoder until the Pro-
ject Menu is displayed.
(i) Select Replace FW and push the encoder. A window
will open, asking for confirmation. By default, the
answer is NO, to prevent accidental misbehaviors.
Rotate the navigation encoder counterclockwise to
select YES, then push the encoder to launch the up-
grade.
The device will automatically reboot and begin the update
procedure. You must wait for it to complete the update be-
fore using it normally. DO NOT TURN OFF POWER FROM
THIS POINT, OR IT WILL VOID YOUR MODULE’S WARRANTY!
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