ADVANCED OPERATION

CTCSS/DCS OPERATION

CTCSS Operation

Many repeater systems require that a very-low-frequency audio tone be superimposed on your FM carrier in order to activate the repeater. This helps prevent false activation of the repeater by radar or spurious signals from other transmitters. This tone system, called “CTCSS” (Continuous Tone Coded Squelch System), is included in your FT-2800M, and is very easy to activate.

CTCSS setup involves two actions: setting the Tone Mode and then setting of the Tone Frequency. These actions are set up by using the Set (Menu) mode, selec-

tions #28 (SQ TYP) and #27 (SQ TNF).

1.Press and hold in the [MHz(SET)] key for one second, then rotate the DIAL knob to select “28 SQ TYP.”

2.Press the [MHz(SET)] key, then rotate the DIAL knob so that “T ENC” appears on the display; this activates the CTCSS Encoder, which allows repeater access.

You may notice an additional “DC ENC” and “DCS” appearing while you

rotate the DIAL knob in this step. We’ll discuss the Digital Code Squelch sys- tem shortly. And also, “T+DCS” and “TSQ+DC” appearing while you rotate the DIAL knob in this step. This is a Split Tone Operation, describe later.

3.Rotating the DIAL knob one more click clockwise in the above step will cause “TSQ” to appear. When “TSQ” appears, this means that the Tone Squelch system is active, which mutes your FT-2800M’s receiver until it receives a call from another radio sending out a matching CTCSS tone. This can help keep your radio quiet until a specific call is received, which may be helpful while operating in congested areas.

4. When you have made your selection of the

 

CTCSS TONE FREQUENCY (Hz)

 

CTCSS tone mode, press the [MHz(SET)]

67.0

 

69.3

71.9

74.4

77.0

 

79.7

key momentarily, then rotate the DIAL knob

82.5

 

85.4

88.5

91.5

94.8

 

97.4

one click counter-clockwise to select Menu

100.0

 

103.5

107.2

110.9

114.8

 

118.8

“27 SQ TNF.” This Menu selection allows

123.0

 

127.3

131.8

136.5

141.3

 

146.2

151.4

 

156.7

159.8

162.2

165.5

 

167.9

setting of the CTCSS tone frequency to be

 

 

171.3

 

173.8

177.3

179.9

183.5

 

186.2

used.

 

 

189.9

 

192.8

196.6

199.5

203.5

 

206.5

5. Press the [MHz(SET)] key to enable adjust-

 

 

 

 

 

 

 

 

210.7

 

218.1

225.7

229.1

233.6

 

241.8

ment of the CTCSS frequency.

250.3

 

254.1

–

–

–

 

–

6.Rotate the DIAL knob until the display indicates the Tone Frequency you need to be using.

7.When you have made your selection, press and hold in the [MHz(SET)] key for one second to save the new setting and exit to normal operation.

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FT-2800M OPERATING MANUAL