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-8800R, 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 mode #41 (TONE M)

and #40 (TONE F).

1.Press the [SET] key momentarily to enter the Set mode.

2.Rotate the “Main” band DIAL knob to select Menu #41 (TONE M).

3.Press the “Main” band DIAL knob momentarily, then rotate the “Main” band DIAL knob so that “ENC” appears on the display; this activates the CTCSS Encoder, which allows repeater access.

You may notice an additional “DCS” icon appearing while you rotate the

“Main” band DIAL knob in this step. We’ll discuss the Digital Code Squelch system shortly.

4.Rotating the “Main” band DIAL knob one more click clockwise in step “3” above will cause “ENC.DEC” to appear. When “ENC.DEC” appears, this means that the Tone Squelch system is active, which mutes your FT-8800R’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.

5. When you have made your selection of the

 

CTCSS TONE FREQUENCY (Hz)

 

 

 

 

CTCSS tone mode, press the “Main” band

67.0

 

69.3

71.9

74.4

77.0

 

79.7

 

 

 

DIAL knob momentarily, then rotate the

82.5

 

85.4

88.5

91.5

94.8

 

97.4

“Main” band DIAL knob one click counter-

100.0

 

103.5

107.2

110.9

114.8

 

118.8

clockwise to select Menu #40 (TONE F).

123.0

 

127.3

131.8

136.5

141.3

 

146.2

This Menu selection allows setting of the

151.4

 

156.7

159.8

162.2

165.5

 

167.9

171.3

 

173.8

177.3

179.9

183.5

 

186.2

CTCSS tone frequency to be used.

 

 

189.9

 

192.8

196.6

199.5

203.5

 

206.5

 

 

 

6. Press “Main” band DIAL knob momentarily

210.7

 

218.1

225.7

229.1

233.6

 

241.8

to enable adjustment of the CTCSS fre-

250.3

 

254.1

–

–

–

 

–

quency.

 

 

 

 

 

 

 

 

7.Rotate the “Main” band DIAL knob until the display indicates the Tone Frequency you need to be using.

8.When you have made your selection, press and hold in the “Main” band DIAL knob for 1/2 second to save the new setting and exit to normal operation.

FT-8800R Operating Manual

29