Operating Manual 6175.4760.02 – 01 3.171
M3SR Series 4100 Starting ATU Learning
3.7.3.1 Starting ATU Learning
Softkey Softkey Type Description
During learning the following status is dis-
played:
1. Press 'ATU Learn' softkey to initiate learn-
ing process.
The ATU starts to perform consecutive ATU
tuning processes (see ATU TUNE) for the se-
lected frequency range.
The learning process can take between
some seconds and up to one hour, depend-
ing on the ATU and antenna connected. It
can be aborted at any time by pressing the
'ESC/CLR' button.
Do not switch off the R&S GB4000C Con-
trol Unit while ATU learning is in progress.
Otherwise learning will be impeded when
the control unit is switched on again.
If learning was successful, the following status
is displayed:
It will disappear as soon as the learning pro-
cess is finished successfully.
If learning is aborted or failed the following sta-
tus is displayed
In case of a 'Tuned failed'’ indication please try
to tune once again or check the antenna instal-
lation and the RF cable between PA and ATU.
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