Motorola PTP 400 Series - Manual (Page 103)

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Default Raster: When the Default Raster option is enabled the pull down selection menus
displayed for Fixed Tx Frequency and Fixed Rx Frequency allow the selection of frequencies
available within the default channel raster. When this option is not enabled the pull down
selection menus display all available channel centre frequencies. This option is provided to
ease the selection of fixed channel frequencies.
Fixed Tx Frequency: This field controls the units Transmit frequency.
Fixed Rx Frequency: This field controls the units Receive frequency.
Installation Tones: This option allows the operator to enable of disable the audible
installation tones.