E.F. Johnson Company 5100 ES Operating Manual page 80

Conventional Mode Features
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, 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 button or select the Sqlch Code menu mode
parameter. Then press the Up/Down buttons 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)
button or the Squelch Select List button again.
3 To check which code is selected, press the Squelch Select List button 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.
5-6 ES Series Models II/III Portable Radio Operating Manual