FLEX-6000 Signature Series – Maestro User Guide
Copyright 2024 FlexRadio, Inc. All Rights Reserved. | Page 101
22 HOW TO OPERATE FM MODE
To use the Maestro in Frequency Modulation (FM), Narrow FM (NFM) mode, or Digital FM (DFM)
mode, select either FM, NFM, or DFM in the Slice Receiver Menu.
Wide FM is the standard FM mode used by commercial radio stations and provides 5kHz deviation
FM modulation and demodulation with pre-emphasis and de-emphasis, CTCSS tone encoding, and
memories.
NFM is the same basic mode but with a 2.5kHz deviation for narrower channel spacing.
DFM is a digital FM mode providing 5kHz of deviation, but no pre-emphasis and de-emphasis. This
mode can be used for modulation of digital data that prefers a flat bandpass such as 9600 baud
packet data.
When an FM mode is selected, controls specific to FM modes are displayed in the Slice Receiver
Menu, as shown below.
22.1 OPERATING FM REPEATERS
From left to right, the first of the FM-specific controls enables and disables CTCSS tones in
transmissions. The second control selects the CTCSS tone value. The repeater controls, “-“, “SIMP”,
and “+” set the repeater offset direction or enable simplex mode (no offset). The REV button
enables a quick frequency change to the repeater split or transmit frequency. The Offset control
selects the frequency offset or “split” in MHz for repeater operation.
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