EF JOHNSON 5100 ES II, Operating Manual

Page: 54 / 144

4-6 5100 ES Model II/III Portable Radio Operating Manual December 2006
Radio-wide Features
4.8 Surveillance Mode
The Surveillance mode totally disables the backlight, all alert tones, and front panel LED
indicator in all operating modes. The radio can be fixed in this mode by programming or it
can be turned on and off by the user if the Surveillance Mode option button or menu
parameter is programmed. The user selected mode permanently overrides the programmed
mode if applicable. To provide a transmit indication when the front panel LED is disabled,
the
icon is displayed (see Section 2.4). This icon is displayed only in the surveillance
mode.
4.9 Scanning
Scanning monitors the channels in the scan list for messages that the radio is programmed
to receive. When a message is detected, scanning stops and the message is received.
Shortly after the message is complete, scanning resumes (unless it has been disabled).
When a call is received in the scan mode, the alias of the channel on which a call is
received (and any other display parameters that may be programmed) are displayed until
scanning resumes. The selected channel alias is then displayed if applicable.
There are two basic scan modes available: Priority (Standard) and Radio Wide. The
operation of the priority type is unique to the type of channel selected, and the operation of
Radio Wide type is the same regardless of the type of channel selected. Only one type can
be enabled at a time. For example, if priority scanning is enabled and radio wide scanning
is selected, priority scanning is automatically disabled and vice versa. More information
on these types of scanning follows.
4.9.1 Priority Scanning
Priority scanning (also referred to as standard scan) monitors only channels that are the
same type as that currently selected. For example, if a conventional channel is selected,
only conventional channels are scanned and likewise for SMARTNET/SmartZone and
Project 25 Trunked channels.
More information on how priority scanning operates in the Conventional Mode is located
in Section 5.10, and for the other modes in Section 6.11. Priority scanning is turned on and
off by the Scan option switch or menu parameter as follows. If this switch or menu
parameter is not programmed, Priority scanning is not available.
• Enable scanning using the Scan option switch or menu parameter. Scanning is enabled
when “Scan On” is briefly displayed and the icon is indicated.
• To turn scanning off, press the Scan option switch again or select “Off” in the scan
menu. Scanning is disabled when “Scan Off” is briefly displayed and the icon is no
longer indicated.