Operation Manual

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VX-7R OPERATING MANUAL30

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 VX-7R, and is

very easy to activate.

CTCSS setup involves two actions: setting the Tone Frequency and then set-

ting of the Tone Mode. These actions are set up by using the key, or Menu

Items

(

TSQTSQ

TSQ/

DCSDCS

DCS/

DTMF #1: SQL TYPDTMF #1: SQL TYP

DTMF #1: SQL TYP

)

and

(

TSQTSQ

TSQ/

DCSDCS

DCS/

DTMF #2: TONE SEDTMF #2: TONE SE

DTMF #2: TONE SE

)

1. Press the key, then press the key. This provides a “Short-cut” to Menu Item

(

TSQTSQ

TSQ/

DCSDCS

DCS/

DTMF #1: SQL TYPEDTMF #1: SQL TYPE

DTMF #1: SQL TYPE).

2. Press the or key so that “

TONETONE

TONE” appears on the

display; this activates the CTCSS Encoder, which allows

repeater access.

You may notice an additional “

DCSDCS

DCS” icon appearing while you press the

or key in this step. We’ll discuss the Digital Code Squelch sys-

tem shortly.

3. Pressing the key in step “2” above will occasionally cause “

SQLSQL

SQL” to appear adja-

cent to the “

TONETONE

TONE.” When “

TONE SQLTONE SQL

TONE SQL” appears, this means that the Tone SQueLch

system is active, which mutes your VX-7R’s receiver until it receives a call from an-

other 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

mode, rotate the DIAL one click clockwise to select Menu

Item labeled (

TSQTSQ

TSQ/

DCSDCS

DCS/

DTMF #2: TONE SETDTMF #2: TONE SET

DTMF #2: TONE SET). This Menu

selection allows setting of the CTCSS tone frequency to

be used.

5. Press the key to enable the adjustment of the CTCSS frequency.

6. Press the or key until the display indicates the Tone Frequency you need to be

using (ask the repeater owner/operator if you don’t know the tone frequency).

7. When you have made your selection, press the key, then press the PTT switch to

save the new settings and exit to normal operation.

Your repeater may or may not re-transmit a CTCSS tone - some systems just

use CTCSS to control access to the repeater, but don’t pass it along when

transmitting. If the S-Meter deflects, but the VX-7R is not passing audio,

repeat steps “1” through “3” above, but rotate the DIAL so that “

SQLSQL

SQL” disappears - this

will allow you to hear all traffic on the channel being received.

ADVANCED OPERATION