Codan Radio Communications UT-4-400 User Manual

DANIELS

ELECTRONICS

2-10

UT-4R400 UHF Project 25 Digital Transmitter Instruction Manual

2.13.2.11

Analog Signaling Settings: CTCSS Tone

This field allows selection of any of 42 EIA CTCSS tones.

2.13.2.12

Analog Signaling Settings: Reverse Burst

For  CTCSS  channels only:  When this field is set to “Enabled”, each transmission  is  terminated
with  a  short  burst  of  CTCSS  tone  with  its  phase  reversed  180  degrees.    This  allows  suitably
equipped receivers to squelch their audio circuits before the transmitted carrier is dropped,  giving a
silent squelch operation.

2.13.2.13

Analog Signaling Settings: DCS Code

This field allows selection of any of 83 DCS tones.

2.13.2.14

Analog Signaling Settings: Turnoff Code

For DCS channels only: When this field is set to “Enabled”, each transmission is terminated with
a short burst of 138 Hz tone. This allows suitably equipped receivers to squelch their audio
circuits before the transmitted carrier is dropped, giving a silent squelch operation.

2.13.2.15

Analog Squelch Settings: Invert DCS

This setting is in effect when the Squelch Type is set to DCS.   It may be set to Normal DCS  or
Invert DCS.   When Invert  DCS  is  selected,  the  transmitter  will  broadcast a  DCS  signal  whose
polarity is reversed.  This should not be required unless the distant receiver has its DCS configured
with the wrong polarity, typically when DCS has been installed as an after-market option.