FlexRadio Systems FLEX-6000 Signature Series User Manual

FLEX-6000 Signature Series - SmartSDR for Windows Software User’s Guide
Page 135
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31.5 RTTY MODE
RTTY mode is a variant of DIGL mode, provided to facilitate tuning, click tuning and reporting of RTTY
Mark frequency via CAT or the FlexLib API. In RTTY mode two fields appear in the DSP drop down
menu in place of the APF/ANF sliders. These are the RTTY Mark and RTTY Shift values:
These values default to 2125 and 170 Hz respectively for operating at 45.5 baud, the standard for HF.
The RTTY Mark is an IF shift of the Slice Receiver indicated frequency which allows click tuning and
spot frequency reporting to third-party programs that expect the reported frequency to be the RTTY
Mark frequency. For click tuning, place your mouse cursor on the Mark frequency (higher of the two
tones) and double click. To the user, the IF shift at the RTTY Mark frequency is transparent since the
slice seems to be tuned to the RTTY Mark.
The Slice Receiver filter is also IF shifted and the default filter presets (shown below) are centered
between the RTTY Mark and Space frequencies.

FlexRadio Systems FLEX-6000 Signature Series Specifications

General

Brand	FlexRadio Systems
Model	FLEX-6000 Signature Series
Category	Transceiver
Language	English