Kenwood Tm-271a/e Transceiver Instruction Manual

							44
8
USING PRIORITY SCAN
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 12 (PRI).
2Press [MENU] and turn the Tuning control to select
“ON” or “OFF” (default).
3Press [MENU] to store the setting or any other key to
cancel.
•“PRI” appears.
4Press any key other than [MENU] to exit Menu Mode.
•The transceiver checks for a signal on the Priority
Channel every 3 seconds.
•When the transceiver detects a signal on the Priority
Channel, “Pr” blinks and the frequency changes to the
Priority Channel.
•If you do not operate any control or key for 3 seconds
after the signal drops, the transceiver returns to the
original frequency and resumes Priority Scan.
Note:
◆If you clear the Priority Channel {page 31}, Priority Scan stops.
◆Priority Scan temporarily stops while the transceiver is
transmitting.
◆If Priority Scan is set to ON, the Weather Alert function isautomatically turned OFF.
MEMORY CHANNEL LOCKOUT
You can lock out Memory Channels that you prefer not to
monitor during Memory Scan or Group Scan {page 42}.
1Press [MR] and turn the Tuning control or press Mic
[UP]/[DWN] to select the Memory Channel to be
locked out.
2Press [F], [MENU] and turn the Tuning control to
select Menu No. 14 (L.OUT).
3Press [MENU] and turn the Tuning control to select
“ON” or “OFF” (default).
Memory Channel Number
4Press [MENU] to store the setting or any other key to
cancel.
5Press any key other than [MENU] to exit Menu Mode.
•The “” icon appears below the Memory Channel
number, indicating the channel is locked out.
6To unlock the Memory Channel, repeat steps 1 ~ 5,
selecting “OFF” in step 3.
•The “” icon disappears.
Note:
◆The Program Scan channels (L0/U0 ~ L2/U2), Call Channel,
Priority Channel (Pr), and Weather Radio Channel (AL) (K market
only) cannot be locked out.
◆Even if a Memory Channel is locked out, you can perform CallScan {page 43} between the Call Channel and Memory Channel. 
						

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8
SCAN RESUME METHOD
The transceiver stops scanning at the frequency (or
Memory Channel) where a signal is detected.  It then
continues or stops scanning according to which Resume
Mode you have selected.
•Time-Operated Mode (default)
The transceiver remains on a busy frequency (or
Memory Channel) for approximately 5 seconds, then
continues to scan even if the signal is still present.
•Carrier-Operated Mode
The transceiver remains on a busy frequency (or
Memory Channel) until the signal drops out.  There is
a 2-second delay between signal dropout and scan
resumption.
•Seek Mode
The transceiver moves to a frequency or Memory
Channel where a signal is present and stops.
To change the scan resume method:
1Press [F], [MENU] and turn the Tu ning control to
select Menu No. 13 (SCAN).
2Press [MENU] and turn the Tu n ing control to select
“TO” (Time-Operated; default), “CO” (Carrier-
Operated), or “SE” (Seek) Mode.
3Press [MENU] to store the new setting or any other
key to cancel.
4Press any key other than [MENU] to exit Menu Mode.
Note:  To temporarily stop scanning and monitor weak signals, press
the Mic PF key assigned the MONI function {page 59}.  Press the
MONI key again to resume scanning. 
						

							46
9
SELECTIVE CALL
CTCSS AND DCS
You may sometimes want to hear calls from only specific
persons or groups.  In this case, use Selective Call.  This
transceiver is equipped with CTCSS (Continuous Tone
Coded Squelch System) and DCS (Digital Coded Squelch).
These Selective Calls allow you to ignore (not hear)
unwanted calls from other persons who are using the same
frequency.  The transceiver unmutes only when it receives
a signal having the same CTCSS tone or DCS code.
Received
Rejected
R
ejected
CTCSS freq.:
82.5 HzCTCSS freq.:
82.5 Hz
CTCSS OFF CTCSS freq.:
100 Hz
TM-271
TM-271
TM-271
TM-271
Note:  CTCSS and DCS do not cause your conversation to be private
or scrambled.  It only relieves you from listening to unwanted
conversations.
CTCSS
A CTCSS tone is a sub-audible tone and is selectable
from among the 42 tone frequencies listed in the table
on page 47.  The list includes 37 EIA standard tones and
5 non-standard tones.
To activate CTCSS, press [F], [CALL].
•As you press [F], [CALL], the selection cycles as follows:
“OFF” ➞ “TONE” ➞ “CTCSS” ➞ “DCS”  ➞ “OFF”.
•“CT” appears on the upper part of display, indicating that
the CTCSS function is activated.
When CTCSS is ON, you will hear calls only when the
selected CTCSS tone is received.  To answer the call, press
and hold Mic [PTT], then speak into the microphone.
Note:
◆You cannot use the CTCSS and Tone/ DCS functions
simultaneously.  Switching the CTCSS function ON after having
activated the Tone/ DCS functions deactivates the Tone/ DCS
functions.
◆If you select a high CTCSS frequency, receiving audio or noise
that contains the same frequency portions may cause CTCSS to
function incorrectly.  To prevent noise from causing this problem,
select an appropriate squelch level {page 14}.
◆While transmitting the 1750 Hz tone by pressing [CALL]{page 25}, the transceiver does not transmit the CTCSS tone. 
						

							47
9
SELECTING A CTCSS FREQUENCY
1Press [F], [MENU] and turn the Tuning control or
press Mic [UP]/[DWN] to select Menu No. 3 (CT).
•The current CTCSS frequency appears.
2Press [MENU] and turn the Tuning control to select
your desired CTCSS frequency.
•The selectable CTCSS frequencies are the same as
those for the Tone frequency.  Refer to the table below
for the available CTCSS frequencies.
3Press [MENU] to store the new setting or any other
key to cancel.
4Press any key other than [MENU] to exit Menu Mode.
Note:  To use the selected CTCSS tone, you must first turn theCTCSS function ON.
Available CTCSS Tone Frequencies
) z H ( s e i c n e u q e r F e n o T 2 4
0 . 7 64. 5 82. 7 0 15. 6 3 18. 3 7 11. 8 1 2
3 . 9 65. 8 89. 0 1 13. 1 4 19. 9 7 17. 5 2 2
9 . 1 75. 1 98. 4 1 12. 6 4 12. 6 8 11. 9 2 2
4 . 4 78. 4 98. 8 1 14. 1 5 18. 2 9 16. 3 3 2
0 . 7 74. 7 90. 3 2 17. 6 5 15. 3 0 28. 1 4 2
7 . 9 70. 0 0 13. 7 2 12. 2 6 15. 6 0 23. 0 5 2
5 . 2 85. 3 0 18. 1 3 19. 7 6 17. 0 1 21. 4 5 2
CTCSS FREQUENCY ID SCAN
This function scans through all CTCSS frequencies to
identify the incoming CTCSS frequency on the received
signal.  You may find this useful when you cannot recall
the CTCSS frequency that the other persons in your
group are using.
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 3 (CT).
2Press [MENU] (1s) to start the CTCSS Frequency ID
Scan. 
						

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9
¥While scanning, the decimal point of the CTCSS
frequency blinks.
¥To reverse the scan direction, turn the Tuning control or
press Mic [UP]/[DWN].
•To quit the function, press any key.
•When a CTCSS frequency is identified, the identified
frequency appears and blinks.
3Press [MENU] to program the identified frequency in
place of the current CTCSS frequency or press any
other key to exit the CTCSS Frequency ID Scan.
•Turn the Tuning control or press Mic [UP]/[DWN] while
the identified frequency is blinking to resume scanning.
4Press any key other than [MENU] to exit Menu Mode.
Note:
◆CTCSS turns ON automatically when performing CTCSS
Frequency ID Scan, even if the current frequency is not set with
CTCSS.
◆Received signals are monitored through the speaker while
scanning is in progress.
◆The transceiver continues to check the Weather Alert Channel
and Priority Channel during CTCSS scanning.
◆CTCSS Frequency ID Scan does not scan the tone if a signal isnot detected.
DCS
DCS is similar to CTCSS.  However, instead of using an
analog audio tone, it uses a continuous sub-audible
digital waveform that represents a 3-digit octal number.
You can select a DCS code from among the 104 DCS
codes listed in the table below.
To activate DCS, press [F], [CALL].
•As you press [F], [CALL], the selection cycles as follows:
“OFF” ➞ “TONE” ➞ “CTCSS” ➞ “DCS”  ➞ “OFF”.
•“DCS” appears on the upper part of display, indicating that
the DCS function is activated.
When DCS is ON, you will hear calls only when the
selected DCS code is received.  To answer the call, press
and hold Mic [PTT], then speak into the microphone.
Note:  You cannot use the DCS function and CTCSS/ Tone functions
simultaneously.  Switching the DCS function ON after having activated
the CTCSS/ Tone functions deactivates the CTCSS/ Tone functions.
SELECTING A DCS CODE
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 4 (DCS).
•The current DCS code appears.
2Press [MENU] and turn the Tuning control to select
your desired DCS code.
•The current DCS code appears and blinks. 
						

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•The available DCS codes are shown in the following
table.
s e d o C S C D 4 0 1
3 2 056 023 150 255 213 331 456 421 613 7
5 2 017 043 121 216 223 332 466 442 623 7
6 2 027 034 132 236 234 313 430 572 643 7
1 3 037 054 152 256 264 323 460 513 634 7
2 3 047 025 162 266 215 354 461 523 645 7
6 3 041 155 134 217 265 364 432 545 6
3 4 051 165 144 247 246 325 462 526 6
7 4 061 126 154 260 356 345 423 546 6
1 5 022 156 164 211 317 355 464 530 7
3 5 052 127 115 251 311 426 456 521 7
4 5 013 147 125 252 321 446 460 632 7
3Press [MENU] to store the new code or any other key
to cancel.
4Press any key other than [MENU] to exit Menu Mode.
DCS CODE ID SCAN
This function scans through all DCS codes to identify the
incoming DCS code on the received signal.  You may
find this useful when you cannot recall the DCS code
that the other persons in your group are using.
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 4 (DCS).
2Press [MENU] (1s) to start the DCS Code ID Scan
function.
•While scanning, the decimal point between “DCS” and
the DCS code blinks.
•To quit the function, press any key.
•When a DCS code is identified, the identified DCS code
appears and blinks.
3Press [MENU] to program the identified DCS code in
place of the current DCS code or press any other key
to exit the DCS Code ID Scan.
•Turn the Tuning control or press Mic [UP]/[DWN] while
the identified DCS code is blinking to resume scanning.
4Press any key other than [MENU] to exit Menu Mode.
Note:
◆DCS turns ON automatically when performing DCS Code ID
Scan, even if the current frequency is not set with DCS.
◆Received signals are monitored through the speaker while
scanning is in progress.
◆The transceiver continues to check the Weather Alert Channel
and Priority Channel during DCS scanning.
◆DCS Code ID Scan does not scan the code if a signal is notdetected. 
						

							50
10
DUAL TONE MULTI-FREQUENCY (DTMF) FUNCTIONS
This transceiver provides you with 10 dedicated DTMF
Memory Channels.  You can store a DTMF number (16
digits max.) in each of these channels to recall later for
speed dialing.
Many repeaters in the U.S.A. and Canada offer a service
called Autopatch.  You can access the public telephone
network via such a repeater by sending DTMF tones.  For
further information, consult your local repeater reference.
MANUAL DIALING
The keys on the Mic keypad function as DTMF keys; the
12 keys found on a push-button telephone plus 4
additional keys (A, B, C, D).
To perform Manual Dialing, follow the steps below.
1Press and hold Mic [PTT] to transmit.
2While transmitting, press the keys in sequence on the
keypad, to send the DTMF tones.
•The corresponding DTMF tones are transmitted.
) z H ( . q e r F9 0 2 16 3 3 17 7 4 13 3 6 1
7 9 6123A
0 7 7456B
2 5 8789C
1 4 90#D
•When DTMF TX Hold is activated {page 51}, you do not
need to continuously press Mic [PTT] to remain in
transmission mode.  However, transmission mode is
retained for only 2 seconds after pressing a key, so if the
next key is not pressed within this time limit, the
transceiver stops transmitting.
DTMF MONITOR
When pressing the Mic DTMF keys, you will not hear
DTMF tones emitted from the speaker.  However, you
can monitor the DTMF tones if desired.
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 33 (DT.M).
2Press [MENU] and turn the Tuning control to select
“ON” or “OFF” (default).
3Press [MENU] to store the setting or any other key to
cancel.
4Press any key other than [MENU] to exit Menu Mode. 
						

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10
DTMF TX HOLD
This function causes the transceiver to remain in
transmission mode for 2 seconds after you release each
key.  So, you can release Mic [PTT] while sending DTMF
tones.
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 30 (DT.H).
2Press [MENU] and turn the Tuning control to select
“ON” or “OFF” (default).
3Press [MENU] to store the setting or any other key to
cancel.
4Press any key other than [MENU] to exit Menu Mode.
AUTOMATIC DIALER
If you use the 10 dedicated DTMF Memory Channels to
store DTMF numbers, you do not need to remember a
long string of digits.
STORING A DTMF NUMBER IN MEMORY
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 28 (DTMF.MR).
2Press [MENU] and turn the Tuning control to select
your desired DTMF Memory Channel number from 0
to 9.
•You can also select a DTMF Memory Channel by using
Mic [UP]/[DWN].
3Press [MENU].
•The DTMF code entry display appears and the first digit
blinks.
4Turn the Tuning control to select a DTMF code.
•You can also enter a DTMF code using the Mic keypad.
Simply press your desired DTMF codes on the keypad.
•On the display, 
 is represented by “E” and  is
represented by “F”.
5Press [MR] to select the DTMF code and move the
cursor to the next digit.
•To move to the previous digit, press [VFO].  To delete
the character at the current cursor position, press [F]. 
						

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6Repeat steps 4 and 5 to enter up to 16 digits.
7Press [MENU] to complete the entry.
•Press any key other than [MR], [VFO], [F], and [MENU]
to cancel the entry.
•To complete an entry of less than 16 digits, press
[MENU] two times.
8Press any key other than [MENU] to exit Menu Mode.
CONFIRMING STORED DTMF NUMBERS
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 28 (DTMF.MR).
2Press [MENU] and turn the Tuning control to select
your desired DTMF Memory Channel number from 0
to 9.
•You can also select a DTMF Memory Channel by using
Mic [UP]/[DWN].
3Press [REV].
•The numbers scroll across the display and the DTMF
tones emit from the speaker without transmitting.
4Press any key other than [REV] or [MENU] to exit.
TRANSMITTING A STORED DTMF NUMBER
1Press Mic [PTT] + Mic [PF/D].
2Release Mic [PF/D] (continue pressing Mic [PTT]),
then press a key from 0 to 9 to transmit the desired
DTMF Memory Channel number.
•To transmit tone “D”, press Mic [PF/D] again.•The number stored in the channel scrolls across the
display, accompanied by DTMF tones from the speaker.
(DTMF tones are not emitted if Menu No. 33 (DT.M) is
set to “OFF”.)
•After transmission, the frequency display is restored.
3Release Mic [PTT].
Note:
◆If you select an empty DTMF Memory Channel and press
[MENU], the frequency display is restored.
◆In step 2, above, you can preview the DTMF Memory Channels
first by turning the Tuning control or pressing Mic [UP]/[DWN].
ADJUSTING THE DTMF TONE TRANSMISSION SPEED
This transceiver allows you to configure the DTMF
number transmission speed between Fast (default) and
Slow.  If a repeater cannot respond to the fast speed,
adjust this parameter.
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 29 (SPD).
2Press [MENU] and turn the Tuning control to select
“FA” (Fast) or “SL” (Slow).
•The tone duration of Fast is 50 ms and Slow is 100 ms.
3Press [MENU] to store the setting or any other key to
cancel.
4Press any key other than [MENU] to exit Menu Mode. 
						

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ADJUSTING THE PAUSE DURATION
You can change the pause duration (a space digit)
stored in Memory Channels.  The default setting is
500 milliseconds.
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 31 (PA).
2Press [MENU] and turn the Tuning control to select
100, 250, 500 (default), 750, 1000, 1500, or 2000 ms.
3Press [MENU] to store the setting or any other key to
cancel.
4Press any key other than [MENU] to exit Menu Mode.
DTMF LOCK
You sometimes may want to disable the keypad to avoid
accidental DTMF transmission.  In this case, turn the
DTMF Lock function ON.
1Press [F], [MENU] and turn the Tuning control to
select Menu No. 32 (DT.L).
2Press [MENU] and turn the Tuning control to select
“ON” or “OFF” (default).
3Press [MENU] to store the setting or any other key to
cancel.4Press any key other than [MENU] to exit Menu Mode.
When this function is activated, you cannot send DTMF
tones using the Mic keypad.  DTMF memory
transmission is also inhibited.