The rmware les are encoded in product-specic form, i.e. if
you accidentally select a le which does not match the product
(e.g. transmitter update le instead of receiver le), then the
pop-up window “Product code error” will appear, and you will
not be able to start the update procedure.
Press the “Download Start” button in the software. Wait briey
until you see movement in the progress bar. This make take up
to ve seconds, depending on the computer (B).
Receiver: press the SET button, and switch the receiver on
while you hold it pressed in.
After a few seconds the Status screen displays the message
“Found target device…”; you can now release the button, and
the rmware update process commences (C).
If the device is not recognised, if the pop-up window “Target de-
vice ID not found” appears, or if the process fails before 100%
is reached, you must restart the update procedure. Repeat all
the steps as described above.
The Status display and the Progress bar show the progress of
the rmware update. The update is completed when the mes-
sage “Complete!!” appears (D).
During the update process the green LED on the receiver also
light up; when the process is complete, the green LED goes
out.
Switch your receiver off, and disconnect the adapter lead.
Caution: after completing an update process, you must in-
itialise the device before using it, i.e. reset it to the factory
default values.
Initialisation:
Press and hold the SET button on the receiver, switch it on, and
release the SET button again. After about four or ve seconds
the green LED on the receiver goes out to conrm that your
radio control system has been re-initialised.
Please note:
The initialisation procedure erases ALL the settings you have
entered. Where necessary, you will need to program your pre-
ferred settings again.
Any settings you have entered using the SMART-BOX are also lost when you initialise the recei-
ver. If you carry out a receiver rmware update, you will need to re-enter these settings.
The latest version of these instructions can be found at www.graupner.de
Manual Receiver GR-12 Graupner HoTT 2.4
04
A
B
C
D
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