Yaesu Musen 20534X20 Users manual
UHF FM TRANSCEIVER
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
FT-257
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
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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 ........................................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
Tone Search Scanning ....................................19
CTCSS/DCS Bell Operation..........................20
Split Tone Operation ......................................21
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
Memory Offset Tuning ..................................25
Deleting Memories ........................................26
Memory Bank Operation ...............................26
Moving Memory Data to the VFO ................27
Memory Only Mode ......................................27
Scanning ............................................................28
VFO Scanning ...............................................29
Manual VFO Scan .....................................29
Programmed VFO Scan .............................29
Memory Scanning ..........................................30
How to Skip (Omit) a Channel
during Memory Scan Operation ................30
Preferential Memory Scan .........................31
Memory Bank Scan ...................................32
Programmable (Band Limit) Memory Scan
(PMS) .............................................................33
“Priority Channel” Scanning
(Dual Watch) ..................................................34
Automatic Lamp Illumination
on Scan Stop ..................................................36
Band Edge Beeper .........................................36
Emergency Channel Operation ......................37
Smart Search Operation ..................................38
ARTS
(Automatic Range Transponder System)
DTMF Operation .............................................42
Miscellaneous Settings .....................................45
Password ........................................................45
Changing the Channel Steps ..........................46
Receive Battery Saver Setup .........................46
TX Battery Saver ...........................................47
Transmitter Time-Out Timer (TOT) ..............47
Busy Channel Lock-Out (BCLO) ..................48
DCS Code Inversion ......................................48
Changing the TX Deviation Level .................49
Reset Procedures ..............................................50
Set Mode ...........................................................51
Specications ....................................................61
........39
General Description
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
The
FT-257
RF power and wealth of convenient features for the 430 MHz amateur band.
Additional features include a transmit Time-Out Timer (TOT), Automatic Power-Off
(APO), Automatic Repeater Shift (ARS), YAESU’s exclusive ARTS™ (Auto-Range
Transponder System) which “beeps” the user when you move out of communications
range with another ARTS™ equipped station. And an RF squelch circuit allows the
owner to set the squelch to open at a programmable setting of the S-Meter, thus reducing guesswork in setting the squelch threshold.
We appreciate your purchase of the
thoroughly, so as to learn about the many exciting features of your exciting new YAESU
hand-held transceiver!
is a compact, high-performance FM hand-held providing up to ve watts of
FT-257
, and encourage you to read this manual
FT-257 OperaTing Manual 1
Accessories & Options
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
Supplied Accessories
FNB-124LI
YHA-76
SAD-11B
CD-57
Belt Clip
Operating Manual
Warranty Card
7.4 V Rechargeable Lithium-Ion Battery Pack
Antenna
AC Wall Charger (100 - 120 VAC, Typ-A plug)
Charger Cradle
Available Options
FNB-124LI
SAD-11B/C/U
CD-57
CN-3
:
“B” sufx is for use with 100-120 VAC, “C” and “U” sufx is for use with 230-240
VAC.
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.
7.4 V Rechargeable Lithium-Ion Battery Pack
AC Wall Charger
Charger Cradle
BNC-to-SMA Adapter
FT-257 OperaTing Manual2
Controls & Connectors
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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 lo-
This coaxial DC jack allows
Knob
DIAL
frequency, and is also used for menu selections
and other adjustments.
(Push To Talk) Switch
PTT
completed.
cated 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 FT257 to become sub-
FT-257
.
FT-257 OperaTing Manual 3
Controls & Connectors (LCD)
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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
Key Lock Active
Battery Indicator
Battery Saver Active
Dual Watch Active
S- & PO Meter
FT-257 OperaTing Manual4
Installation of Accessories
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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 antenna, 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
compact package.
Installation of the battery is easy and quick:
Open the Battery Cover Latch on the Battery Cover,
then remove the Battery Cover from the radio while
pulling the top side of the Battery Cover.
Connect the 3-pin connector from the Battery pack
to the battery jack on the transceiver.
Install the
Install 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
water 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
Recharging can be provided while the pack is installed inside the
FNB-124LI
FT-257
Battery Pack into the radio.
will not have a problem with
FT-257 OperaTing Manual 5
FT-257
.
Installation of Accessories
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
Battery Charging
If the battery has never been used, or its charge is depleted, it may be charged by connecting the
EXT DC
Cable (with its cigarette lighter plug) or
also be used for charging the battery.
SAD-11B
jack. If only 12 ~ 16 Volt DC power is available, the optional
Overnight Battery Charger, as shown in the illustration, to the
DC
E-DC-6
E-DC-5B
DC Cable (plug and wire only) may
The display will blink “
nished, the “
A fully-discharged pack will be charged completely in 5 hours. Disconnect the
from the
11B
Important Note
The
transmission).
Please be advised that the
in the immediate vicinity, so we do not recommend its use adjacent to such devices.
CHG.ING
EXT DC
SAD-11B
CHG.ING
” disappears in the display.
jack and the AC line outlet.
is not designed to power the transceiver for operation (reception or
”, while the battery is being charged. When charging is
SAD-11B
may contribute noise to TV and radio reception
SAD-
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: Enough Battery Power
: Lower Battery Power
(Blinking): Prepare to charge (or replace) the Battery
FT-257 OperaTing Manual6
Installation of Accessories
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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 remove it.
FT-257 OperaTing Manual 7
Operation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
Switching Power ON and OFF
Be sure the Battery Pack is installed, and that the battery is fully charged. Connect
the antenna to the top panel
Press and hold the
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
[
POWER
ANTENNA
]
key for two seconds to turn on the radio The current
Adjusting the Audio Volume Level
Press the
displayed, rotate the
the speaker is at a comfortable level.
[
VOL/SQL
]
key to enter the receiver audio adjustment mode. When “
knob or press the
DIAL
Squelch Adjustment
Press the
is displayed, rotate the
the backgroundnoise is just silenced. This state is known as the “Squelch Threshold”.
1) A special “RF Squelch” feature is provided on this radio. This feature allows you
2) If you’re operating in an area of high RF pollution, you may need to consider “Tone
[
VOL/SQL
to set the squelch so that only signals exceeding a certain S-meter level will open
the squelch. See page 13 for details.
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. Or, if your friends have radios equipped
with DCS (Digital Coded Squelch) like your FT-257 has, try using that mode for
silent monitoring of busy channels.
]
key twice to enter the squelch level adjustment mode. When “
knob or press the
DIAL
jack.
[
POWER
[p]/[q]
[p]/[q]
]
key for two seconds.
VOL
key until the noise or audio from
LVL
key to set the Squelch so that
” is
”
FT-257 OperaTing Manual8
Frequency Navigation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
Operation
The
FT-257
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-257
:
1) Tuning Dial
Rotation of the
operating band. Clockwise rotation of the
higher frequency, while counter-clockwise rotation will lower the operating frequency.
If you press the
will be selected. This feature is extremely useful for making rapid frequency excursions
over the wide tuning range of the
allows tuning in the pre-programmed steps established for the
DIAL
[
]
key momentarily, then rotate the
F/W
FT-257
DIAL
.
causes the
DIAL
FT-257
to be tuned toward a
, frequency steps of 1 MHz
2) Scanning
[p]
Press and hold in either the
ward scanning, respectively (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-257 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 31:
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.
FT-257
[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-257 OperaTing Manual 9
Operation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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-257
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 deection conrms “High
Power” operation, while deection of two bars indicates
“Low Power” operation. Six bars indicate “Medium Power” operation. Additionally, the “
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 appear
LOW
“Low” Power
“Mid” Power
“HigH” Power
Changing the Transmitter Power Level
To change the power level:
[
Press the
Rotate 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.
H/L
HIGH
[p]/[q]
” (5 W), “
key to select the desired power output
” (2 W), and “
MID
switch to save the new setting and
PTT
knob or press the
DIAL
LOW
” (0.5 W).
1) The FT-257 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/W] key, then press the PTT switch, to cause the FT-257 to transmit (temporarily) on High power. After one transmission, the power level will revert to the
previously-selected (“Low” or “Medium” power) setting.
FT-257 OperaTing Manual10
Advanced Operation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
Now that you’re mastered the basics of
of the really neat features.
FT-257
operation, let’s learn more about some
Keyboard Locking
[
To activate the locking feature, prees the
The “
prees the
In order to prevent accidental frequency change or inadvertent transmission, various aspects of the
keypad may be locked out. You may change the lockout combinations.
To lock out some or all of the keys:
1. Press the
2. Rotate the
3. Press the
4. Rotate the
LK KEY
LKDIAL
LK K+D
LK PTT
LK P+K
LK P+D
LK ALL
” icon will appear on the LCD. To cancel locking
[
]
key, then press the
F/W
[
]
key to enter the Set mode.
SET
knob or press the
DIAL
Set Mode Item 24:
[
]
key momentarily to enable adjustment of
F/W
this Item.
knob or press the
DIAL
listed below:
: Just the front panel keypad is locked out
: Just the top panel
: Both the keypad and
: The
PTT
: Both the
: Both the
: All of the above are locked out
LOCK
switch is locked out (TX not possible)
PTT
PTT
[
POWER
.
is locked out
DIAL
DIAL
switch and keypad are locked out
switch and
]
key, then press the
F/W
]
key.
FT-257
[p]/[q]
[p]/[q]
are locked out (factory default)
DIAL
’s
key to select
are locked out
and
DIAL
key to the desired locking scheme as
[
POWER
]
key.
5. When you have made your selection, press the
and return to normal operation.
FT-257 OperaTing Manual 11
switch to save the new setting
PTT
Advanced Operation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
LCD Illumination
Your
FT-257
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 23:
3. Press the
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.
[
]
key to enter the Set mode.
SET
knob or press the
DIAL
.
LAMP
[
]
key momentarily to enable adjustment of
F/W
knob or press the
DIAL
[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 keypad is pressed.
If you want to turn the beep off:
[
1. Press the
2. Rotate the
Set Mode Item 9:
3. Press the
this Item.
4. Rotate the
5. Press the
6. To turn the beep back on again, select “
4 above.
KEY
: The beeper sounds when you press the keypad.
KEY+SC
stops.
]
key to enter the Set mode.
SET
knob or press the
DIAL
.
BEEP
[
]
key momentarily to enable adjustment of
F/W
knob or press the
DIAL
switch to save the new setting and return to normal operation.
PTT
: The beeper sounds when you press the keypad, or when the scanner
[p]/[q]
[p]/[q]
KEY
key to select
key to change the setting to “
” or “
KEY+SC
(factory default)” in step
FT-257 OperaTing Manual12
OFF
.”
Advanced Operation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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 33:
3. Press the
this Item.
4. Rotate the
level for the squelch threshold (
5. Press the
]
key to enter the Set mode.
SET
knob or press the
DIAL
RF SQL
[
]
key momentarily to enable adjustment of
F/W
knob or press the
DIAL
.
[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
switch to save the new setting and return to normal operation.
PTT
Checking the Battery Voltage
, or
OFF
).
The
FT-257
battery voltage.
1. Press the
2. Rotate the
lect Set Mode Item 14:
3. Press the
DC voltage being supplied.
4. Press the
’s microprocessor includes programming which will measure the current
[
]
key to enter the Set mode.
SET
knob or press the
DIAL
[
]
key momentarily to display the current
F/W
[
]
key, followed by the
F/W
DC VLT
.
[p]/[q]
PTT
key to to se-
switch to return to normal operation.
FT-257 OperaTing Manual 13
Repeater Operation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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-257
includes a number of features which make repeater operation
Repeater Shifts
The
FT-257
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-257
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 6:
3. Press the
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
[
]
key to enter the Set mode.
SET
knob or press the
DIAL
.
ARS
[
]
key momentarily to enable adjustment of
F/W
knob or press the
DIAL
[p]/[q]
[p]/[q]
key to select
key to select “
switch to save the new setting
PTT
ARS. ON
”.
FT-257 OperaTing Manual14
Repeater Operation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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:
[
”, “
]
key to enter the Set mode.
SET
knob or press the
DIAL
RPT.MOD
[
]
key momentarily to enable adjustment of
F/W
knob or press the
DIAL
”, and “
RPT.+
RPT.OFF
[p]/[q]
.
[p]/[q]
.”
key to select
key to select the desired shift among
switch to save the new setting
PTT
1. Press the
2. Rotate the
Set Mode Item 34:
3. Press the
this Item.
4. Rotate the
“
RPT.–
5. When you have made your selection, press the
and return to normal operation.
If you make a change in the shift direction, but still have Automatic Repeater Shift
still 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 make a change in the repeater shift on a memory channel that you 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.
Changing the Default Repeater Shifts
If you travel to a different region, you may need to change the default repeater shift so
as to ensure compatibility with local operating requirements.
To do this, follow the procedure below:
[
1. Press the
2. Rotate the
Set Mode Item 30:
3. Press the
this Item.
4. Rotate the
nitude.
5. When you have made your selection, press the
and return to normal operation.
If you just have one “odd” split that you need to program, don’t change the “default”
repeated shifts using this Set Mode Item. Enter the transmit and receive frequencies
separately, as shown on page 22.
]
key to enter the Set mode.
SET
knob or press the
DIAL
R SHIFT
[
]
key momentarily to enable adjustment of
F/W
knob or press the
DIAL
FT-257 OperaTing Manual 15
.
[p]/[q]
[p]/[q]
key to select
key to select the new repeater shift mag-
switch to save the new setting
PTT
Repeater Operation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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 32: 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-257 OperaTing Manual16
CTCSS/DCS Operation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
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.
[
1. Press the
2. Rotate the
Set Mode Item 42:
3. Press the
this Item.
4. Rotate the
“
” indication appears on the display; this activates
TONE
the CTCSS Encoder, for access to repeaters requiring a
CTCSS tone.
5. Rotation of the
[p]/[q]
the
cause the “
displayed, this means that the Tone SQuelch system is ac-
tive, which mutes your
sending out a matching CTCSS tone. This can help keep your radio quiet until a specic call is received, which 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
DIAL knob in this step; this means that the Reverse Tone Squelch system is
active, which mutes your FT-257’s receiver (instead of opening the squelch)
when it receives a call from the radio sending a matched CTCSS tone. The
“ ” icon will blink on the display when the Reverse Tone Squelch system is
activated.
2) You may notice the “DCS” indications on the display while you rotate the
DIAL knob still more. We’ll discuss the Digital Code Squelch system (for
“DCS”) later.
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 44:
9. Press the
this Item.
]
key to enter the Set mode.
SET
knob or press the
DIAL
.TYP.
SQL
[
]
key momentarily to enable adjustment of
F/W
knob or press the
DIAL
knob one more “click” or press
DIAL
key one more “press” in step “4” above will
” notation to appear. When “
TSQL
FT-257
[
]
key to enter the Set mode.
SET
knob or press the
DIAL
TN FRQ
[
]
key momentarily to enable adjustment of
F/W
.
[p]/[q]
[p]/[q]
key to select
key so that
TSQL
’s receiver until it receives a call from another radio
[p]/[q]
key to select
” is
PTT
FT-257
switch
,
FT-257 OperaTing Manual 17
CTCSS/DCS Operation
FCCID:K6620534X20/IC:511B-20534X20
YAESUMUSENCO.,LTD.
CTCSS Operation
10. Rotate the
using (ask the repeater owner/operator if you don’t know the tone frequency).
11. When you have made your selection,
press the
switch to save the new settings and
exit to normal operation. This is differ-
ent than the usual method of restoring
normal operation, and it applies 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-257 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 you need to be
DIAL
[
]
key, then press the
F/W
PTT
CTCSS TONE FREQUENCY (Hz
67.0 69.3 71.9 74.4 77.0 79.7
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-257
)
, 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 42:
3. Press the
]
key to enter the Set mode.
SET
knob or press the
DIAL
.TYP.
SQL
[
]
key momentarily to enable adjustment of
F/W
[p]/[q]
key to select
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
.
COD
switch to save the new setting.
PTT
[
]
key to enter the Set mode.
SET
knob or press the
DIAL
[p]/[q]
key to select Set Mode Item 15:
FT-257 OperaTing Manual18
DCS.
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