FLEX-6000 Signature Series – Maestro User Guide
Copyright 2024 FlexRadio, Inc. All Rights Reserved. | Page 100
21 HOW TO OPERATE AM AND SAM MODES
To use the Maestro in Amplitude Modulation (AM) or Synchronous AM (SAM) mode, select either
AM or SAM in the Slice Receiver Menu. In selective fading conditions, SAM mode may provide
better detection of AM signals. The carrier frequency indicator is shown at the center of the filter
passband.
Standard AM receive filter bandwidths from 5.6K to 20K can be selected from the Slice Receiver
Menu. Custom bandwidths can be adjusted by use of the High/Low Shift/Width multi-function
control. When the control is in High/Low mode, adjusting the inner knob moves the location of the
lower frequency margin of the filter while adjusting the outer knob moves the location of the
higher frequency margin. Pop-up displays provide detailed information as the adjustments are
made.
The AM Carrier control is found on the TX Menu. It allows the carrier level to be set while
maintaining a constant overall PEP output of the transmitter. With the AM Carrier control set to
maximum, standard 25% carrier operation is provided. When both the RF Power and AM Carrier
controls are set to maximum, the carrier level will be approximately 25W, and the PEP output will
be approximately 100W. Reducing the RF Power control will reduce the carrier level and PEP in
proportion. By reducing the AM Carrier level, the percentage of carrier relative to total PEP can be
reduced to increase talk power in the AM sidebands. This is called Reduced Carrier AM.
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