UT12-000 Universal Encoder/Decoder
SM40 Installation and Operation Manual
May 15, 2012 Rev: 5.00
Page 3-11
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
3.5.4
Operation when the transceiver is scanning:
In order for the UT12 to decode receive CCIR tone sequences when the transceiver is scanning, the
following conditions must be met:
Transceiver
Scanning
Type
Channels
allowed
in
Scan
List.
NTX138E
LIST
9
max.
NTX138E
LIST+PRIORITY 7
max.
The NTX138E can scan a maximum of 10 channels and still have the UT12 reliably decode its tone ID
sequence. These 10 channels include the home channel (1), the number of priority channels set
(NTX138E can have 0, 1, or 2) and the number of list channels set (NTX138E can have 9, minus the
number of priority channels set).
CCIR Sequence: Must have long (700ms) first tone.
3.5.4.1 Priority
Channels:
When the transceiver is locked on a priority scan channel the UT12 will always turn on the head phone
audio. This is not affected by the
MON ON/OFF
switch. If the transceiver locks on a priority channel it
will remain on that channel until loss of carrier (transmit or receive) for three seconds, or if the control
head’s
CHAN SELECT-
switch is toggled. Pressing the
CHAN SELECT-
switch will remove that priority
scan channel front the
scan list until scanning is restarted (the control head’s
SCAN/NORM
switch is put
in the
NORM
position and then back in
SCAN
).
3.5.4.2
List Scan Channels:
When the transceiver is receiving on a list scan channel the UT12 will not turn on the head phone audio
until the UT12’s tone ID sequence is decoded. This is not
affected by the
MON ON/OFF
switch.
If the transceiver is locked on a list scan channel it will remain on the channel until disconnect (loss of
carrier (transmit or receive) for 20 seconds or pressing the
b
utton). Pressing the control head’s
CHAN SELECT-
switch will not take list channels out of the scan list.
If the transceiver is locked on a list scan channel it will continue to scan priority channels. If the
transceiver then locks on a priority channel it will remain on the priority channel until loss of carrier
(transmit or receive) for three seconds, or if the control head’s
CHAN SELECT-
switch is toggled. The
transceiver will return to the list scan channel that was previously connected, and will remain on that
channel until disconnected (
button is pressed, or 20 seconds after returning to the list scan
channel).
3.5.4.3 Home
Channel:
If the UT12 is in
MON ON
mode then the transceiver will lock and stay on the home channel if there is
carrier present. If the UT12 is in
MON OFF
mode then the transceiver will stay on the home channel only
if the correct tone sequence is decoded, otherwise scanning will continue.
