EF JOHNSON 5100 ES II, Operating Manual, Page: 65 / 144

December 2006 5100 ES Model II/III Portable Radio Operating Manual 5-5
Conventional Mode Features
5.4.4 Selective Squelch Code Select (CTCSS/DCS/NAC)
Note
Call Guard codes can be permanently reprogrammed by keypad programming described
in Section 5.15.
This feature allows the normal transmit and receive Call Guard (CTCSS/DCS/NAC)
programming to be temporarily overridden with a code selected from a pre programmed
list. It is available if the Squelch Select List option switch or menu parameter and a
CTCSS/NAC code list have been programmed.
In addition, conventional systems can be programmed for the Keypad CTCSS/DSC
feature. Codes can then be selected directly from the table by pressing the key for the
code. For example, to select code 3 from the table, simply press the “3” key. No other
conventional mode functions can then be assigned to these keys.
The CTCSS/DCS/NAC list is programmed with up to 64 tone (CTCSS) or digital (DCS)
Call Guard codes. Different codes can be programmed for the transmit and receive modes,
and carrier squelch (selective squelch disabled) can be programmed if desired. In addition,
each position can be programmed with an NAC code for use with P25 operation.
When the Call Guard code is changed using this feature, it remains selected even if other
channels are selected. However, if radio power is cycled or a talk-around channel is
selected, the normal codes are reselected. When scanning, the selected code also applies to
all scanned channels. Each channel can also be programmed to always ignore the code
selected from this list and use the default code instead.
If both analog and digital (Project 25) channels can be selected or scanned, the CTCSS/
DCS code for the selected position is used for analog channels and the NAC code for the
selected position is used for P25 channels. If a channel is programmed for mixed mode
operation, the selective squelch type (analog or digital) programmed for the transmit mode
determines the selective squelch type used.
Proceed as follows to select a code using the Squelch Select List option button or menu
parameter:
1
Press the Squelch Select List option switch or select the Sqlch Code menu mode
parameter. Then press the Up/Down switch to select the desired code. The display
indicates “SEL SQ xx” where, “xx” is the selected code from 1-64. The code number
and actual code are alternately displayed (NACs are displayed in hexadecimal).
2
To select the displayed code and return to the normal display, press the < F2 > (Select)
key or the Squelch Select List switch again.
3
To check which code is selected, press the Squelch Select List switch once to display
the current selection and then again to return to normal operation.
4
To return to the normal selective squelch codes, select “Default” in this mode. As
previously described, the normal codes are also automatically reselected whenever
radio power is cycled or a talk-around channel is selected.