Yaesu FT-252, FT-257 Operating Manual
VHF FM TRANSCEIVER
FT-252
Operating Manual
YAESU MUSEN CO., LTD.
Tennozu Parkside Building
2-5-8 Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-0002 Japan
YAESU USA
6125 Phyllis Drive, Cypress, CA 90630, U.S.A.
YAESU UK
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
YAESU HK
Unit 2002, 20/F, 9 Chong Yip Street,
Kwun Tong, Kowloon, Hong Kong
Contents
General Description ...........................................1
Accessories & Options .......................................2
Controls & Connections ....................................3
Top & Front Panel ...........................................3
LCD .................................................................4
Installation of Accessories .................................5
Antenna Installation .........................................5
Installation of FNB-124LI Battery Pack..........5
Battery Charging ..............................................6
Low Battery Indication ....................................6
Belt Clip Installation / Removal ......................7
Operation ............................................................8
Switching Power On and Off ...........................8
Adjusting the Audio Volume Level .................8
Squelch Adjustment .........................................8
Frequency Navigation ......................................9
Transmission ..................................................10
Advanced Operation ........................................11
Keyboard Locking .........................................11
LCD Illumination...........................................12
Disabling the Keypad Beeper ........................12
RF Squelch.....................................................13
Checking the Battery Voltage ........................13
Repeater Operation..........................................14
Repeater Shifts ...............................................14
Automatic Repeater Shift (ARS) ...................14
Manual Repeater Shift Activation .................15
CTCSS/DCS Operation ...................................17
CTCSS Operation ..........................................17
DCS Operation...............................................18
CTCSS/DCS Bell Operation..........................19
Split Tone Operation ......................................20
Tone Calling (1750 Hz) .................................21
Memory Mode ..................................................22
Memory Storage ............................................22
Storing Independent
Transmit Frequencies (“Odd Split”) ..........22
Memory Recall ..............................................23
HOME Channel Memory ..............................23
Labeling Memories ........................................24
Enable the Memory
Alpha-Numeric Tag display ...........................24
Memory Offset Tuning ..................................25
Deleting Memories ........................................26
Memory Bank Operation ...............................26
Moving Memory Data to the VFO ................27
Memory Only Mode ......................................27
Weather Broadcast Channels .........................28
Scanning ............................................................29
VFO Scanning ...............................................30
Manual VFO Scan .....................................30
Programmed VFO Scan .............................30
Memory Scanning ..........................................31
How to Skip (Omit) a Channel
during Memory Scan Operation ................31
Preferential Memory Scan .........................32
Memory Bank Scan ...................................33
Programmable (Band Limit) Memory Scan
(PMS) .............................................................34
“Priority Channel” Scanning
(Dual Watch) ..................................................35
Automatic Lamp Illumination
on Scan Stop ..................................................37
Band Edge Beeper .........................................37
Weather Alert Scan ........................................38
Emergency Channel Operation ......................39
Smart Search Operation ..................................40
ATS
(Automatic Transponder System)
DTMF Operation .............................................43
Miscellaneous Settings .....................................46
CW Identier Setup .......................................46
Password ........................................................47
Changing the Channel Steps ..........................48
Receive Battery Saver Setup .........................48
TX Battery Saver ...........................................49
Transmitter Time-Out Timer (TOT) ..............49
Busy Channel Lock-Out (BCLO) ..................50
DCS Code Inversion ......................................50
Changing the TX Deviation Level .................51
Reset Procedures ..............................................52
Set Mode ...........................................................53
Specications ....................................................63
.....................41
General Description
The
FT-252
to ve watts of RF power, and a wealth of convenient features for 2-meter amateur band
operations.
Additional features include a transmit Time-Out Timer (TOT), Automatic Power-Off
(APO), Automatic Repeater Shift (ARS), YAESU’s exclusive Auto Transponder System
(ATS), which “beeps” the user when moving out of communications range with another
ATS equipped station; and an RF squelch circuit which allows adjusting the squelch to
open at a programmed setting of the S-Meter, thus reducing guesswork in setting the
squelch threshold.
We appreciate your purchase of the
Thoroughly. You will learn about the many exciting features of your exciting new YAESU hand-held transceiver!
is a compact submersible*, high-performance FM hand-held providing up
FT-252
, and encourage you to read this manual
* IPX5 water submersible.
FT-252 OperaTing Manual 1
Accessories & Options
Supplied Accessories
FNB-124LI
YHA-75
SAD-11B
PA-48B/C/F
CLIP-24
Operating Manual
Quick Manual
Warranty Card
7.4 V Rechargeable Lithium-Ion Battery Pack
Antenna
AC Wall Charger (for USA version)
AC Wall Charger (for EXP version)
Belt Clip
Available Options
FNB-124LI
SAD-11B
PA-48B/C/F
CD-57
SDD-11
E-DC-6
YHA-75
CLIP-24
CN-3
“B” sufx is for use with 100-120 VAC, “C” is for use with 230-240 VAC, and “F”
is for use with 220 VAC.
7.4 V Rechargeable Lithium-Ion Battery Pack
AC Wall Charger
AC Wall Charger
Charger Cradle
DC/DC Converter (with cigarette lighter plug)
DC Cable (plug and wire only)
Antenna
Belt Clip
BNC-to-SMA Adapter
Availability of accessories may vary. Some accessories are supplied as standard per local requirements, while others may be unavailable in some regions. This product is designed to perform optimally when used with genuine YAESU accessories. YAESU shall
not be liable for any damage to this product and/or accidents such as re, leakage or
explosion of a battery pack, etc., caused by the malfunction of non- YAESU accessories.
Consult your YAESU dealer for details regarding these and any newly-available options.
Connection of any non-YAESU-approved accessory, should it cause damage, may void
the Limited Warranty on this apparatus.
FT-252 OperaTing Manual2
Controls & Connectors
Antenna Jack
Connect the supplied rubber ex antenna (or an-
other antenna presenting a 50-Ohm impedance)
here.
The main tuning Dial is used to set the operating
Speaker
The internal speaker is located here.
Press this switch to transmit, and release it (to receive) after your transmission is
LCD (Liquid Crystal Display)
The display shows the current operating conditions, as described on the next page.
Keypad
These 9 keys select many of most important operating features on the
MIC
The internal microphone is
This coaxial DC jack allows
Knob
DIAL
frequency. It is also used for menu selections and
other adjustments.
(Push To Talk) Switch
PTT
completed.
located here.
EXT DC
connection to an external DC
power source (5-10V DC).
The center pin of this jack is
the Positive (+) connection.
merged in water while the
rubber cap over the EXT DC
jack is removed.
Jack
Do not allow the FT252 to become sub-
FT-252
.
FT-252 OperaTing Manual 3
Controls & Connectors (LCD)
Memory Channel Number
Skip Memory Channel or Pref-
erential Memory Channel
Repeater Shift Direction
CTCSS/DSC Operation
Priority Channel
Memory Bank Active
Operating Frequency
BUSY Indicator
TX Indicator
Low TX Power Selected
Secondary Keypad Active
DTMF Autodial Active
Bell Alarm Active
Automatic Power-Off Active
Battery Indicator
Battery Saver Active
Dual Watch Active
S- & PO Meter
FT-252 OperaTing Manual4
Installation of Accessories
Antenna Installation
The supplied antenna provides good results over the entire frequency range of the transceiver. However, for enhanced reception on certain non-Amateur frequencies, you may
wish to connect an antenna designed specically for that frequency range, as the supplied antenna is necessarily a compromise outside the Amateur band, and cannot be expected to
provide high performance at all frequencies.
To install the supplied antenna, hold the bottom end of the an-
tenna, then screw it onto the mating connector on the transceiver until it is snug. Do not over-tighten by use of extreme force.
Notes:
Never transmit without having an antenna connected.
When installing the supplied antenna, never hold the upper part of the antenna while
screwing it onto the mating connector on the transceiver.
If using an external antenna for transmission, ensure that the SWR presented to the
transceiver is 1.5:1 or lower, to avoid excessive feedline loss.
Installation of FNB-124LI Battery Pack
The
FNB-124LI
package. Recharging can be completed while the pack is installed inside the
Installation of the battery is easy and quick:
Release the Battery Cover Latch and remove the
Battery Cover from the radio by lifting the top of the
Cover.
Connect the 3-pin plug from the Battery pack to the
battery jack on the transceiver.
Install the
Replace the Battery Cover by carefully aligning the
two tabs on the bottom of the cover with the slots
on the radio, then gently press the top side of the
Battery Cover. Conrm that a Rubber Gasket of the
Battery Cover is installed correctly.
Close the Battery Cover Latch until it locks in place
with a “Click”.
Caution:
To insure the
intrusion, make sure the battery cover is properly
installed and the battery latch is closed.
is a high performance Li-ion battery providing high capacity in a compact
FT-252
FNB-124LI
FT-252
Battery Pack into the radio.
will not be damaged by water
.
FT-252 OperaTing Manual 5
Installation of Accessories
Battery Charging
If the battery has never been used, or its charge is depleted, it may be charged by connecting the
EXT DC
Converter (with its cigarette lighter plug) or
charging the battery.
The display will indicate “
completed, the “
A fully-discharged pack will be charged completely in 5 hours. Disconnect the
or
11B
SAD-11B
jack. If only 12 ~ 14 Volt DC power is available, the optional
from the
PA-48
or
” indication disappears from the display.
CHRG
EXT DC
AC Wall Charger, as shown in the illustration, to the
PA-48
E-DC-6
”, while the battery is being charged. When charging is
CHRG
jack and the AC line outlet.
SDD-11
DC Cable may also be used for
DC/DC
SAD-
CD-57
(option)
Important Note
The
SAD-11B
ception or transmission).
Please be advised that the
dio reception in the immediate vicinity, so we do not recommend its use adjacent to
such devices.
and
is not designed to power the transceiver for operation (re-
PA-48
SAD-11B
and
may contribute noise to TV and ra-
PA-48
Low Battery Indication
When the battery charge is almost depleted, a “ ” icon will appear on the display.
When the “ ” icon appears, it is recommended that you charge the battery soon.
No Icon: Sufcient Operating Battery Power
: Lower Battery Power
(Blinking): Prepare to charge (or replace) the Battery
FT-252 OperaTing Manual6
Installation of Accessories
Belt Clip Installation / Removal
To install the Belt Clip:
Align the Belt Clip to the groove
above the Battery compartment, then
press the Belt Clip downward until it
locks in place with a “Click”.
Belt Clip Tab
To remove the Belt Clip:
Press the Belt Clip tab away from the
transceiver to unlock the Belt Clip,
then slide the Belt Clip up-ward to re-
move it.
FT-252 OperaTing Manual 7
Operation
Switching Power ON and OFF
Be sure the Battery Pack is installed, and the battery is fully charged. Connect the
antenna to the top panel
Press and hold the
turn the radio on. The current DC supply voltage will be
indicated on the display for 2 seconds. After this 2 second
interval, the display will resume its normal indication of
the operating frequency.
To turn the radio off, press and hold the
ANTENNA
[
POWER
Adjusting the Audio Volume Level
Press the
ment mode. When “
or press the
speaker is at a comfortable level.
[
VOL/SQL
[p]/[q]
]
key to enter the receiver audio adjust-
” is displayed, rotate the
VOL
key until the noise or audio from the
Squelch Adjustment
Press the
justment mode. When “
knob or press the
background noise is just silenced. This state is known as the
“Squelch Threshold”.
[
VOL/SQL
]
key twice to enter the squelch level ad-
” is displayed, rotate the
SQL
[p]/[q]
key to set the Squelch so that the
jack.
(
)]
key for two seconds to
[
POWER
DIAL
(
)]
key for two seconds.
knob
DIAL
1) A special “RF Squelch” feature is provided on this radio. This feature allows you to set the squelch so that only signals exceeding a certain S-meter level will open the squelch. See page 13 for details.
2) If you’re operating in an area of high RF interference, you may need to consider “Tone Squelch” operation using the built-in CTCSS Decoder. This feature
will keep your radio quiet until a call is received from a station sending a carrier
which contains a matching (subaudible) CTCSS tone. If your friends have radios
equipped with DCS (Digital Coded Squelch) like your FT-252, you may try using
that mode for silent monitoring of busy channels.
FT-252 OperaTing Manual8
Frequency Navigation
Operation
The
FT-252
allows free tuning throughout the operating band.
Two basic frequency navigation methods are available on the
will initially be operating in the “VFO” mode, a channelized system which
FT-252
:
1) Tuning Dial
Rotation of the
erating band. Clockwise rotation of the
frequency, while counter-clockwise rotation will lower the operating frequency.
If you press the
MHz will be selected. This feature is extremely useful for moving rapidly over the wide
tuning range of the
allows tuning in the pre-programmed steps established for the op-
DIAL
[
F/MW
FT-252
causes the
DIAL
]
key momentarily, then rotate the
.
FT-252
to be tuned upward in
, frequency steps of 1
DIAL
2) Scanning
Press and hold in either the
ward scanning (Manual VFO Scan).
If you wish to reverse the direction of the scan (i.e. toward a lower frequency, instead
of a higher frequency), just rotate the
tion while the FT-252 is scanning. The scanning direction will be reversed. To revert to
scanning toward a higher frequency once more, rotate the
The scanner will stop when it receives a signal strong enough to break through the
Squelch threshold. The
of the “RESUME” mode (Set Mode Item 29:
tarily to cancel the scanning. This only stops the scan; it does not cause transmission to
occur. See page 29 for details regarding Scan Operation.
[p]
FT-252
[q]
or
key for one second to initiate upward or down-
one click in the counter-clockwise direc-
DIAL
one click clockwise.
DIAL
will then hold on that frequency according to the setting
RESUME
). Press the
switch momen-
PTT
FT-252 OperaTing Manual 9
Operation
Transmission
Once you have set up an appropriate frequency inside the 144 MHz Amateur band on
which the
steps; more advanced aspects of transmitter operation will be discussed later.
FT-252
can transmit, you’re ready to go on the air! These are the most basic
To transmit, press the
in the lower right-hand corner of the speaker grille) in a normal voice level. The “TX”
indicator will appears on the LCD during transmission.
To return to the receive mode, release the
During transmission, the relative power level will be indicated on the bar graph at
the bottom of the LCD; full scale indication confirms
“High Power” operation, while a display of two bars indicates “Low Power” operation. Six bars indicate “Medium
Power” operation. Additionally, the “
pear at the display while operating on the “Low Power”
and “Medium Power” settings.
1) If you’re just talking to friends in the immediate area,
you’ll get much longer battery life by switching to Low
Power operation, described in the next chapter. And
don’t forget: always have an antenna connected when
you transmit.
2) Transmission is possible only on the 144 MHz amateur
band.
switch, and speak into the front panel microphone (located
PTT
switch.
PTT
” icon will ap-
LOW
“Low” Power
“Mid” Power
“HigH” Power
Changing the Transmitter Power Level
To change the power level:
[
Press the
Press the
level. Available selections are “
When you have made your choice, press the
return to normal operation.
]
key. The LCD shows the current power output level.
LOW
[
]
key (repeatedly, if necessary) to select the desired power output
LOW
HIGH
” (5 W), “
” (2 W), and “
MID
switch to save the new setting and
PTT
LOW
” (0.5 W).
1) The FT-252 is smart! When you store memories, you can store the power output
settings separately in each memory, so you don’t waste battery power when using
very close-in repeaters!
2) When you are operating on the “Low” or “Medium” power setting, you can press
the [F/MW] key, then press the PTT switch, to cause the FT-252 to transmit (temporarily) on High power. After one transmission, the power level will revert to the
previously-selected (“Low” or “Medium” power) setting.
FT-252 OperaTing Manual10
Advanced Operation
Now that you have mastered the basics of
FT-252
operation, let’s learn more about
some of the really neat features.
Keyboard Locking
To activate the locking feature, press the
[
POWER
(
)]
key momentarily.
To cancel locking press the
[
POWER
( )]
key momentarily again.
In order to prevent accidental frequency change or inadvertent transmission, various
aspects of the
FT-252
’s
DIAL
and keypad may be locked out. You may change the lock-
out combinations.
To lock out some or all of the keys:
1. Press the
[
SET/ATS
]
key to enter the Set mode.
2. Rotate the
DIAL
knob or press the
[p]/[q]
key to select
Set Mode Item 22:
LOCK
.
3. Press the
[
SET/ATS
]
key momentarily to enable adjust-
ment of this Item.
4. Rotate the
DIAL
knob or press the
[p]/[q]
key to select the desired locking scheme
as listed below:
LK KEY
: Just the front panel keypad is locked out
LKDIAL
: Just the top panel
DIAL
is locked out
LK K+D
: Both the keypad and
DIAL
are locked out (factory default)
LK PTT
: The
PTT
switch is locked out (TX not possible)
LK P+K
: Both the
PTT
switch and keypad are locked out
LK P+D
: Both the
PTT
switch and
DIAL
are locked out
LK ALL
: All of the above are locked out
5. When you have made your selection, press the
PTT
switch to save the new setting
and return to normal operation.
FT-252 OperaTing Manual 11
Advanced Operation
LCD Illumination
Your
FT-252
The reddish illumination yields clear viewing of the display in a dark environment, with
minimal degradation of your night vision.
Three options for activating the lamp are provided:
KEY
CONT
OFF
Here is the procedure for setting up the Lamp operating mode:
1. Press the
2. Rotate the
Set Mode Item 21:
3. Press the
ment of this Item.
4. Rotate the
scribed above.
5. When you have made your choice, press the
return to normal operation.
includes a reddish illumination lamp which aids in nighttime operation.
Mode: Illuminates the LCD lamp for ve seconds when you rotate the
knob or press the keypad or any switch (except
the factory-programmed default setting.
Mode: Illuminates the LCD lamp continuously.
Mode: Disables the LCD lamp.
[
SET/ATS
DIAL
[
SET/ATS
DIAL
]
key to enter the Set mode.
knob or press the
.
LAMP
]
key momentarily to enable adjust-
knob or press the
[p]/[q]
[p]/[q]
key to select
key to select one of the three modes de-
PTT
switch to save the new setting and
switch). This is
PTT
DIAL
Disabling the Keypad Beeper
A keypad beeper provides useful audible feedback whenever a key button is pressed.
If you want to turn the beep off:
1. Press the
2. Rotate the
Set Mode Item 7:
3. Press the
ment of this Item.
4. Rotate the
5. Press the
6. To turn the beep back on again, select “
4 above.
KEY
KEY+SC
stops.
[
SET/ATS
DIAL
[
SET/ATS
DIAL
PTT
: The beeper sounds when you press the keypad.
: The beeper sounds when you press the keypad, or when the scanner
]
key to enter the Set mode.
knob or press the
.
BEEP
]
key momentarily to enable adjust-
knob or press the
switch to save the new setting and return to normal operation.
[p]/[q]
[p]/[q]
key to select
key to change the setting to “
KEY
” or “
KEY+SC
(factory default)” in step
FT-252 OperaTing Manual12
OFF
.”
Advanced Operation
RF Squelch
A special RF Squelch feature is provided on this radio. This feature allows you to set the
squelch so that only signals exceeding a certain S-meter level will open the squelch.
To set up the RF squelch circuit for operation, use the following procedure:
1. Press the
2. Rotate the
Set Mode Item 31:
3. Press the
ment of this Item.
4. Rotate the
level for the squelch threshold (
5. Press the
[
SET/ATS
DIAL
[
SET/ATS
DIAL
PTT
]
key to enter the Set mode.
knob or press the
RF SQL
knob or press the
switch to save the new setting and return to normal operation.
.
]
key momentarily to enable adjust-
[p]/[q]
[p]/[q]
key to select
key to select the desired signal strength
S-1, S-2, S-3, S-4, S-5, S-7, S-FULL
, or
OFF
Checking the Battery Voltage
).
The
FT-252
1. Press the
2. Rotate the
Set Mode Item 12:
3. Press the
rent DC voltage being supplied.
4. Press the
includes feature which will display the current battery voltage.
[
SET/ATS
DIAL
]
key to enter the Set mode.
knob or press the
DC VLT
[
SET/ATS
[
SET/ATS
]
key momentarily to display the cur-
]
key, followed by the
[p]/[q]
.
key to select
switch to return to normal operation.
PTT
FT-252 OperaTing Manual 13
Repeater Operation
Repeater stations, usually located on mountaintops or other high locations, provide a
dramatic extension of the communication range for low-powered hand-held or mobile
transceivers. The
simple and enjoyable.
FT-252
includes a number of features which make repeater operation
Repeater Shifts
The
FT-252
Depending on the part of the band
in which you are operating, the repeater shift may be either downward
(–) or upward (+), and one of these
icons will appear at the top of the
LCD when repeater shifts have been
enabled.
has been congured, at the factory, with the repeater shift set to 600 kHz.
Automatic Repeater Shift (ARS)
The
FT-252
appropriate repeater shift to be applied automatically whenever you tune into the designated repeater sub-bands in your country. These sub-bands are shown below.
If the ARS feature does not appear to be working, you may have accidentally disabled it.
To re-enable ARS:
1. Press the
2. Rotate the
Set Mode Item 5:
3. Press the
ment of this Item.
4. Rotate the
5. When you have made your selection, press the
and return to normal operation.
provides a convenient Automatic Repeater Shift feature, which causes the
[
SET/ATS
DIAL
[
SET/ATS
DIAL
]
key to enter the Set mode.
knob or press the
.
ARS
]
key momentarily to enable adjust-
knob or press the
[p]/[q]
[p]/[q]
key to select “
key to select
switch to save the new setting
PTT
ARS. ON
”.
FT-252 OperaTing Manual14
Repeater Operation
Manual Repeater Shift Activation
If the ARS feature has been disabled, or if you need to set a repeater shift direction other
than that established by the ARS, you may set the direction of the repeater shift manually.
To do this:
1. Press the
2. Rotate the
Set Mode Item 32:
3. Press the
ment of this Item.
4. Rotate the
“
RPT.–
5. When you have made your selection, press the
and return to normal operation.
If you manually change the shift direction, but still have Automatic Repeater Shift engaged (see previous section), when you change frequency (by rotating the DIAL knob,
for example) the ARS will over-ride your manual setting of the shift direction. Turn
ARS off if you do not wish this to happen.
If you manually change the repeater shift on a memory channel that you have already
stored, the radio will consider this a “temporary” change, unless you store the memory
once more, this time with the desired repeater shift engaged.
[
SET/ATS
DIAL
[
SET/ATS
DIAL
”, “
RPT.+
]
key to enter the Set mode.
.
[p]/[q]
[p]/[q]
.”
key to select
knob or press the
RPT.MOD
]
key momentarily to enable adjust-
knob or press the
”, and “
RPT.OFF
key to select the desired shift among
switch to save the new setting
PTT
Changing the Default Repeater Shifts
If you travel to a different region, you may need to change the default repeater shift to
ensure compatibility with local operating requirements.
To do this, follow the procedure below:
1. Press the
2. Rotate the
Set Mode Item 28:
3. Press the
ment of this Item.
4. Rotate the
nitude.
5. When you have made your selection, press the
and return to normal operation.
If you have only one “odd” split that you need to program, don’t change the “default”
repeater shifts using this Set Mode Item. Instead, enter the transmit and receive frequencies separately, as shown on page 22.
[
SET/ATS
DIAL
[
SET/ATS
DIAL
]
key to enter the Set mode.
knob or press the
R SHIFT
knob or press the
.
]
key momentarily to enable adjust-
[p]/[q]
[p]/[q]
key to select
key to select the new repeater shift mag-
switch to save the new setting
PTT
FT-252 OperaTing Manual 15
Repeater Operation
Manual Repeater Shift Activation
Checking the Repeater Uplink (Input) Frequency
It often is helpful to be able to check the uplink (input) frequency of a repeater, to see if
the calling station is within direct (“Simplex”) range.
[
To do this, just press the
repeater uplink frequency. Press the
normal monitoring of the repeater downlink (output) frequency. While you are listening
on the input frequency to the repeater using the
blink.
The conguration of this key may be set either to “REV” (for checking the input frequency of a repeater), or “HOME” (for instant switching to the “Home” channel for
the band you are operating on). To change the conguration of this key, use Set Mode
Item 30: REV/HM. See page 59.
]
key. You’ll notice that the display has shifted to the
REV
[
]
key again to cause operation to revert to
REV
[
]
key, the repeater offset icon will
REV
FT-252 OperaTing Manual16
CTCSS/DCS Operation
CTCSS Operation
Many repeater systems require that a very-low-frequency audio tone be superimposed
on your FM carrier in order to activate the repeater. This helps prevent false activation
of the repeater by radar or spurious signals from other transmitters. This tone system,
called “CTCSS” (Continuous Tone Coded Squelch System), is included in your
and is very easy to activate.
FT-252
,
1. Press the
2. Rotate the
Set Mode Item 40:
3. Press the
ment of this Item.
4. Rotate the
“
TONE
the CTCSS Encoder, for access to repeaters requiring a
CTCSS tone.
5. Rotation of the
the
cause the “
displayed, this means that the Tone Squelch system is active and will mute the
is sending a matching CTCSS tone. This can help keep your radio quiet until a specic call is received; this may be helpful while operating in congested areas of the
band.
1) You may notice a “REV TN” indication on the display while you rotate the
2) You may notice the “DCS” indications on the display while you rotate the
6. When you have made your selection of the CTCSS tone mode, press the
to save the new setting.
7. Press the
8. Rotate the
Set Mode Item 42:
9. Press the
ment of this Item.
[
SET/ATS
DIAL
[
SET/ATS
DIAL
” indication appears on the display; this activates
[p]/[q]
key one more “press” in step “4” above will
TSQL
DIAL knob in this step; this means that the Reverse Tone Squelch system is
active, which mutes your FT-252’s receiver (instead of opening the squelch)
when it receives a call from any radio sending a matched CTCSS tone. The
“ ” icon will blink on the display when the Reverse Tone Squelch system is
activated.
DIAL knob still more. We’ll discuss the Digital Code Squelch system (DCS)
later.
[
SET/ATS
DIAL
[
SET/ATS
]
key to enter the Set mode.
knob or press the
.TYP.
SQL
]
key momentarily to enable adjust-
knob or press the
knob one more “click” or pressing
DIAL
” notation to appear. When “
FT-252
]
key to enter the Set mode.
knob or press the
TN FRQ
.
]
key momentarily to enable adjust-
[p]/[q]
[p]/[q]
receiver until it receives a call from another radio that
[p]/[q]
key to select
key so that
” is
TSQL
key to select
PTT
switch
FT-252 OperaTing Manual 17
CTCSS/DCS Operation
CTCSS Operation
10. Rotate the
repeater you are using (if you don’t know the tone frequency, ask the repeater owner/
operator).
11. When you have made your selection,
press the
the
switch to save the new set-
PTT
tings and exit to normal operation. This
is different than the usual method of
restoring normal operation, and it ap-
plies only to the configuration of the
CTCSS/DCS frequencies.
Your repeater may or may not re-transmit a CTCSS tone - some systems just use
CTCSS to control access to the repeater, but don’t pass it along when transmitting. If
the S-Meter deects, but the FT-252 is not passing audio, repeat steps “1” through “4”
above, but rotate the DIAL so that “TSQ” disappears - this will allow you to hear all
trafc on the channel being utilized.
Another form of tone access control is Digital Code Squelch, or DCS. It is a newer,
more advanced tone system which generally provides more immunity from false paging than does CTCSS. The DCS Encoder/Decoder is built into your
eration is very similar to that just described for CTCSS. Your repeater system may be
congured for DCS; if not, DCS is frequently quite useful in Simplex operation if your
friend(s) use transceivers equipped with this advanced feature.
knob until the display indicates the Tone Frequency required by the
DIAL
CTCSS TONE FREQUENCY (Hz
67.0 69.3 71.9 74.4 77.0 79.7
[
SET/ATS
]
key, then press
82.5 85.4 88.5 91.5 94.8 97.4
100.0 103.5 107.2 110.9 114.8 118.8
123.0 127.3 131.8 136.5 141.3 146.2
151.4 156.7 159.8 162.2 165.5 167.9
171.3 173.8 177.3 179.9 183.5 186.2
189.9 192.8 196.6 199.5 203.5 206.5
210.7 218.1 225.7 229.1 233.6 241.8
250.3 254.1 – – – –
DCS Operation
FT-252
)
, and op-
Just as in CTCSS operation, DCS requires that you set the Tone Mode to DCS and
that you select a tone code.
1. Press the
[
2. Rotate the
Set Mode Item 40:
3. Press the
SET/ATS
DIAL
[
SET/ATS
]
key to enter the Set mode.
knob or press the
.TYP.
SQL
]
key momentarily to enable adjust-
[p]/[q]
key to select
ment of this Item.
4. Rotate the
“
” indication appears on the display; this activates the
DCS
knob or press the
DIAL
[p]/[q]
key so that
DCS Encoder/Decoder.
5. Press the
6. Press the
7.
Rotate the
8. Press the
switch to save the new setting.
PTT
[
SET/ATS
DIAL
[
SET/ATS
]
key to enter the Set mode.
knob or press the
]
key momentarily to enable adjustment of this Item.
[p]/[q]
key to select Set Mode Item 13:
DCS.COD
FT-252 OperaTing Manual18
.
CTCSS/DCS Operation
DCS Operation
9. Rotate the
desired DCS Code (a three-digit number). Ask the repeater owner/operator if
you don’t know DCS Code; if you are
working simplex, just set up the DCS
Code to be the same as that used by
your friend(s).
10. When you have made your selection,
press the
the
tings and exit to normal operation.
Remember that the DCS is an Encode/Decode system, so your receiver will remain
muted until a matching DCS code is received on an incoming transmission. Switch
the DCS off when you’re just tuning around the band!
[
SET/ATS
switch to save the new set-
PTT
knob to select the
DIAL
]
key, then press
DCS CODE
023 025 026 031 032 036 043 047 051 053
054 065 071 072 073 074 114 115 116 122
125 131 132 134 143 145 152 155 156 162
165 172 174 205 212 223 225 226 243 244
245 246 251 252 255 261 263 265 266 271
274 306 311 315 325 331 332 343 346 351
356 364 365 371 411 412 413 423 431 432
445 446 452 454 455 462 464 465 466 503
506 516 523 526 532 546 565 606 612 624
627 631 632 654 662 664 703 712 723 731
732 734 743 754 – – – – – –
CTCSS/DCS Bell Operation
During CTCSS Decode or DCS operation, you may set up the
ing “bell” sound alerts you to the fact that a call is coming in. Here is the procedure for
activating the CTCSS/DCS Bell:
1. Set the transceiver up for CTCSS Decode (“Tone Squelch”) or DCS operation, as
described previously.
2. Adjust the operating frequency to the desired channel.
8 T
[
SET/ATS
DIAL
[
SET/ATS
DIAL
” rings,
PTT
3. Press the
4. Rotate the
Set Mode Item 8:
5. Press the
ment of this Item.
6. Rotate the
the Bell. The available choices are “
or “
7. Press the
and exit to normal operation.
]
key to enter the Set mode.
knob or press the
.
BELL
]
key momentarily to enable adjust-
knob or press the
(continuous ringing), or
CONT
switch momentarily to save the new setting
[p]/[q]
[p]/[q]
,” “
1 T
key to select
key to set the desired number of rings of
,” “
3 T
.
OFF
5 T
FT-252
,”
such that a ring-
When you are called by a station whose transceiver is sending
a CTCSS tone or DCS code which matches that set into your
Decoder, the Bell will ring in accordance with this programming. When the CTCSS/DCS Bell is activated, the “ ” icon
will appear at the upper right corner on the LCD.
FT-252 OperaTing Manual 19
Loading...