Acom 2000R Operating Manual page 18

b) Procedure for preparation of USR-tunings.
We recommend that you prepare USR-tunings for the center frequencies of the segments, but you can
do them for other preferred frequencies.
If you use more than one antenna per segment, it is necessary that you select the
proper antenna number (see S.4d) BEFORE the next step. Otherwise you may
"overwrite" some useful tuning for another antenna number.
To select the AUTO TUNE sub-menu while in the MAIN menu, press ENT twice:
The amplifier will then wait for you to apply between 10 and 20W continuous (CW) signal with the
desired frequency. If you leave the amplifier waiting longer than 40 seconds, then it will automatically
revert to the MAIN menu.
The automatic matching process starts the moment power remains constant within the indicated
boundaries. This is shown by the mark on the lower line which indicates the applied input power and
must be somewhere between the two brackets
is executed automatically in less than 3 seconds and the following message to the operator appears,
while the letter "S" is being sent in CW:
If the KEY-OUT control is used (see S.2-4e), the above message will be skipped.
If for some reason matching cannot be accomplished successfully (for example excessive VSWR or
unstable drive power during tune-up), the process ends up with the choice of DEF-tuning and you will
hear "K" being sent in CW:
After removing drive power, the RCU returns automatically to the MAIN menu with USR or DEF
indicated in the lower right-hand side corner.
N O T E
. The antenna impedance matching
N O T E
17