
15
Transmit and Receive Signaling
Carrier Squelch operation may be desirable if there are no other users on the channel and there are no interference. In
this mode, the two-way radio users will be able to hear the command signals transmitted by the OSMAC Base Station. To
enable this mode, press
1
to select
CARRIER ONLY
. Press the
–
(dash) key to exit the menu.
CTCSS operation should be used if there are other users sharing the channel, if there is excessive interference, or if the
two-way radio users do not want to hear the paging signals. In this mode, a low frequency tone is transmitted along with
the desired audio. The receiver will only be enabled if this tone is present at the correct frequency.
To enable this mode, press
2
to select CTCSS. Use the arrow keys to select the desired tone frequency. Press
the
–
(dash) or
F1
key to accept the frequency and exit the entry mode.
CW Identification Call Sign
In many cases, the rules and regulations under which the OSMAC Base Station is licensed requires the station's Call Sign
to be transmitted using Morse Code at regular intervals for identification purposes. The base station will send the Call
Sign (with CTCSS turned off) every 10 minutes if the Call Sign has been programmed. This feature is set to disabled
when the unit leaves the factory.
To enable this feature, press
5
from the main configuration menu. At the prompt, enter your station's Call Sign from your
license as follows:
• Numbers are entered directly from the keypad.
• Letters and other special symbols are entered by pressing the
and
arrow keys, and press the
F2
key to accept.
• Press the
F2
key to enter a space character
_
(underscore) which results in a pause in the Morse Code.
• Press the
DEL
key to delete errors or to disable CW Identification by totally clearing the display.
• Press the
F1
or
–
(dash) key to accept the Call Sign and exit the menu.
Summary of Contents for OSMAC
Page 2: ......