9) Energy Saving Function
When the Energy Saving Function is activated, the unit will switch to standby mode if no sig-
nal has been sent or received, and no control has been used for a certain period. In standby
mode the power consumption is lowered. If the PT-3508 (3) is not in use for a longer period, it is
recommended to turn the unit off.
This function can be set with the software T-UP2.
10) Scan Function
The scan function allows searching some or all available channels for incoming signals until
a transmitting station has been found. The list of channels to be scanned has to contain at least
two channels for the scan function to be enabled. A channel that is on the list of channels to be
scanned is indicated by the capital letter
A
on the left side of the display.
Add a channel to the list of scanned channels:
1. Press the FUNC key ( 9 ), and the capital letter
F
has to show on the left side of the display.
2. Press the SCAN key ( 10 ), and the capital letter
A
has to show on the left side of the display.
To remove a channel of the list, precede in the same order as described above. This time, the
letter
A
will disappear.
To scan the selected channels press the scan key [SCAN] ( 10 ). All symbols will disappear
and the wording
SCAn
will show on the display. Now all selected channels will be scanned in
ascending order. As soon as an occupied channel is found, the scanning stops and the display
reads
CH. X
, where
X
stands for the channel number. The blinking dot behind the letters
CH
indi-
cates that the scan function is active. Meanwhile the LED ( 4 ) emits green light. If for three
seconds no incoming signal is received, the scan function proceeds and the display reads
SCAn
again until another busy channel is found.
Besides the squelch function, there are other muting functions available. The scan function
stops only on those channels where the incoming signal uses the same muting function. If a
channel uses a DTMF code ( Dual-Tone-Multi-Frequency, also known as touch-tone ), the scan-
ner stops if an incoming signal is received but the squelch function will only open the speaker
once the correct DTMF code has been verified. For more information, contact your dealer and
refer to paragraph 2 of the chapter
Muting Function of the PT-3508 (3)
.
To stop scanning press any key except the monitor key [MONI] ( 7 ). When disabling the scan
function while scanning is in process, the unit will return to the channel where scanning was star-
ted. When you deactivate the scan function, while the scanner stops on a channel, the unit will
remain on this channel after the scan function has been turned off.
It is not possible to transmit while the scan function is enabled.
ENGLISH
Muting Functions of the TEAM PT-3508 (3)
1) General
Several functions available allow suppressing incoming signals of unwanted stations that
transmit on the same channel. Only those filtered incoming signals are audible. Two procedures,
CTCSS and DQT, add a permanent coding to the sent signal. Two other procedures, Code-
Squelch and Selective Calling, send a code followed by the message. These muting functions
can be programmed with the optional software T-UP2.
2) Description of the Procedures
a) CTCSS (Continuous Tone Coded Squelch System )
In the CTCSS, the transmitter adds an inaudible tone to the signal that is recognized by the
CTCSS detection decision circuit of the receiver, and, consequently, will disable the CTCSS
muting function, so the signal is audible.
When receiving signals that use no or a different CTCSS code, the signal is not audible but
the LED ( 4 ) emits green light to indicate that the channel is occupied. If you are using CTCSS,
your dealer can set one of 39 different CTCSS tones in the range of 67 Hz to 250 Hz.
b) DQT
The DQT procedure constantly repeats a specific order of inaudible digital impulses that are
added to the signal. When the receiver’s DQT detection decision circuit recognizes the identical
DQT code, the muting function is disabled and the signal is audible. When receiving signals with
no or another DQT code, no signal is audible but the LED ( 4 ) emits green light to indicate that
the channel is occupied. If you are using DQT encoding, your dealer can set one out of 166 dif-
ferent DQT codes for each channel you are using.
c)
Code-Squelch Procedure
In the Code-Squelch procedure, the transmitter sends a code that is composed of 3 - 10
short DTMF tones that will precede the message. If the receiver’s Code-Squelch detection deci-
sion circuit verifies the code, the message will be audible. When receiving signals that use no
code or another Code-Squelch code, only the LED ( 4 ) will emit green light to indicate that the
channel is occupied.
After the reception and verification of the identical code, the Code-Squelch muting function
is disabled, which is indicated by an acoustic signal. It will be reactivated after an adjustable peri-
od, when no signal is received. To reactivate the Code-Squelch muting function immediately,
press the monitor key [MONI] ( 7 ) shortly.
Pushing the PTT key disables the Code-Squelch muting function. During this time the LED
( 4 ) blinks orange and, in the display a hyphen shows behind the letters
CH
.
If group calling has been set up, one or more of the DTMF doubled tones of the
3 - 10 tone combination can be replaced by a special DTMF double tone, the group tone. This
way, several receivers that use a similar Code-Squelch coding, which varies only at one identi-
cal position, can be called simultaneously.
If the 3 - 10 DTMF double tone combination contains a group tone, the Code-Squelch detec-
tion decision circuit recognizes a group call. The acoustic signals upon recognition of a group
calling and a single call vary.
In addition, your dealer can set up an automatic return call that will inform the transmitting
station that the call had been received. This feature is not available for the group calling.
d) Selective Calling
The selective calling procedure sends 4 DTMF double tones preceding the message. This
code needs to be verified by the receiver’s selective calling detection decision circuit, in order to
disable the muting function for the message to be audible. The message, that needs to be sent
immediately after the 4 DTMF tones, can contain up to 5 symbols where each symbol corre-
sponds to one DTMF double tone.
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ENGLISH
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