Vertex Standard VX-170 User manual

FCC ID: K6620223X20
IC ID: 511B-20223X20
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Vertex Standard Co., Ltd.
General Description
The VX-120/170 is a small size FM hand-held providing up to five watts of RF power and
wealth of convenient features for 2m amateur band.
New and exciting features of the VX-120/170 are the Emergency Automatic ID (EAI) function,
that will automatically cause your VX-120/170 to transmit your callsign and engage your rig’s
microphone, even if you are disabled and unable to press the PTT switch; Enhanced Paging
and Code Squelch (EPCS), that allows you to page a particular station and only receive calls
from that station, if desired; and a security Password feature, that will allow you to turn on and
operate your transceiver only after you enter your Password.
Additional features include a convenient access key for Vertex Standard’s WIRES™
(Wide-coverage Internet Repeater Enhancement System), a transmit Time-Out Timer (TOT),
Automatic Power-Off (APO), Automatic Repeater Shift (ARS), Vertex Standard’s exclusive
ARTS™(Auto-Range Transponder System) which “beeps” the user when you move out of
communications range with another ARTSTM equipped station, plus provision for reduction of
the TX deviation in areas of high channel congestion. 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 VX-120/170, and encourage you to read this manual
thoroughly, so as to learn about the many exciting features of your exciting new Vertex
Standard hand-held transceiver!
Accessories & Options
Supplied Accessories
 FNB-83 7.2 V, 1,400 mAh
Rechargeable Nickel-Metal Hydride Battery Pack
 NC-88B/C/U* Overnight Battery Charger (10-Hour)
 Belt Clip
 Antenna
 Operating Manual
 Warranty Card
Available Options
 FNB-83 7.2 V, 1,400 mAh
Rechargeable Nickel-Metal Hydride Battery Pack
 NC-88B/C/U* Overnight Battery Charger (10-Hour)

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 VAC-370 Desktop Rapid Charger
 CD-26 Charger Cradle
 FBA-25A Dry Cell Battery Case for
 CN-3 BNC-to-SMA Adapter
 CT-32 Cloning Cable
 CT-91 Microphone Adapter
 E-DC-5B DC Cable with Cigarette-Lighter Adapter
 E-DC-6 DC Cable; plug and wire only
 MH-57A4B Speaker/Microphone
 VC-27 Ear piece/Microphone
 VC-24 VOX Headset
* “B” suffix is for use with 100-120 VAC, “C” suffix is for use with 230-240 VAC, and “U” suffix
is for use with 230 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 Vertex Standard accessories. Vertex Standard
shall not be liable for any damage to this product and/or accidents such as fire, leakage or
explosion of a battery pack, etc., caused by the malfunction of non- Vertex Standard
accessories. Consult your Vertex Standard dealer for details regarding these and any
newly-available options. Connection of any non-Vertex Standard-approved accessory,
should it cause damage, may void the Limited Warranty on this apparatus.
Control & Connections
Top & Front Panel
(1) ANTENNA Jack
Connect the supplied rubber flex antenna (or another antenna presenting a 50-Ohm
impedance) here.
(2) MIC/SP Jack
This four-conductor miniature jack provides connection points for microphone audio,
earphone audio, PTT, and ground.
Do not allow the VX-120/170 to become submerged in water while the plastic cover over the
MIC/SP jack is removed.

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(3) VOL/PWR Knob
Turn this control clockwise to turn the radio on and to increase the volume.
Counter-clockwise rotation into the click-stop will turn the radio off.
(4) DIAL Knob
This (inner) 20-position detented rotary switch is used for setting the operating frequency,
and also is used for menu selections and other adjustments.
(5) Speaker
The internal speaker is located here.
(6) LCD (Liquid Crystal Display)
The display shows the current operating condition, as described on the next page.
(7) Keypad
These 16 keys select many of most important operating features on the VX-120/170. The
functions of the keys are described in detail on the pages to follow.
(8) TX/BUSY Indicator Lamp
This indicator glows green when the squelch opens, and turns red during transmit.
(9) MIC
The internal microphone is located here.
Side Panel
(1) PTT (Push To Talk) Switch
Press this switch to transmit, and release it (to receive) after your transmission is completed.
(2) MONI Switch
Pressing this switch disables the noise squelching action, allowing you to hear very weak
signals near the background noise level temporarily.
Press the [F/W] key on the keypad first, then press this switch to enable to adjustment of the
squelch threshold level.
(3) EXT DC Jack
This coaxial DC jack allows connection to an external DC power source (6-16V DC). The
center pin of this jack is the Positive (+) connection.
Do not allow the VX-120/170 to become submerged in water while the rubber cap over the
EXT DC jack is removed.

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Keypad Functions (VX-120)
Key Primary Function
(Press Key)
Secondary Function
(Press [F/W] Key +)
Third Function
(Press and Hold Key)
[WX(∞/EMG)] Recalls the “Weather”
broadcast channel
bank.
Activates the Internet
Connection feature.
Activates the
EMERGENCY
function.
[LOW(SET/LOC
K)]
Selects the desired
transmit power output
level.
Engages the Set
(Menu) Mode.
Activates the Key
Lockout feature.
[▲(MHz)] Increases the VFO
frequency by one
step or moves the
memory channel to
the next-highest
channel.
Tunes the VFO
frequency upward in
1 MHz steps.
Starts the scanner
upward (toward a
higher frequency or a
higher channel
number).
[▼(MHz)] Decreases the VFO
frequency by one
step or moves the
memory channel to
the next-lowest
channel.
Tunes the VFO
frequency downward
in 1 MHz steps.
Starts the scanner
downward (toward a
lower frequency or a
lower channel
number).
[REV(HOME] *2Reverses the transmit
and receive
frequencies while
working through a
repeater.
Switches to the
“Home” (favorite
frequency) Channel.
None
[MR(SKIP)] Set the frequency
control to the Memory
Recall mode.
Activates the
“Memory “Tune”
mode while in the
Memory Recall mode.
Selects the Memory
Scan “Skip”
channel-selection
mode.
None
[VFO(PRI)] Set the frequency
control to the VFO
mode.
Select the VFO
between “VFO A” and
“VFO B” while in the
VFO mode.
Activates the Priority
(Dual Watch)
function.
Starts the
programmed VFO
scanner upward
while in the VFO
mode.
Select the Memory
Bank while in the
Memory Recall mode.
[F/W] Activates the
“Alternate” key
function.
Disables the
“Alternate” key
function.
Activates the
“Memory Write” mode
(for memory channel
storage).

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Keypad Functions (VX-170)
Key Primary Function
(Press Key)
Secondary Function
(Press [F/W] Key +)
Third Function
(Press and Hold Key)
[1(SQ TYP)] Frequency entry digit
“1.”
Activates the CTCSS
or DCS Operation.
Recalls the “Weather”
broadcast channel
bank.
[2(CODE)] Frequency entry digit
“2.”
Selects the CTCSS
tone or DCS code
number.
Activates the ARTS
feature.
[3(LOW)] Frequency entry digit
“3.”
Selects the desired
transmit power output
level.
Activates the Smart
Search feature.
[▲(MHz)] Increases the VFO
frequency by one
step or moves the
memory channel to
the next-highest
channel.
Tunes the VFO
frequency upward in
1 MHz steps.
Starts the scanner
upward (toward a
higher frequency or a
higher channel
number).
[4(RPT)] Frequency entry digit
“4.”
Selects the direction
of the uplink
frequency shift (either
“-,” “+,” or “simplex”)
during repeater
operation.
Activates the
EMERGENCY
function.
[5(BELL)] Frequency entry digit
“5.”
Selects the
CTCSS/DCS Bell
ringer repetitions.
None
[6(LOCK)] Frequency entry digit
“6.”
Activates the Key
Lockout feature.
Activates the Key
Lockout feature.
[▼(MHz)] Decreases the VFO
frequency by one
step or moves the
memory channel to
the next-lowest
channel.
Tunes the VFO
frequency downward
in 1 MHz steps.
Starts the scanner
downward (toward a
lower frequency or a
lower channel
number).
[7(P1)]*1Frequency entry digit
“7.”
Select the RF
Squelch threshold
level.
None
[8(P2)]*1Frequency entry digit
“8.”
None
[9(DTMF)] Frequency entry digit
“9.”
Selects the DTMF
mode.
None
[REV(HOME] *2Reverses the transmit
and receive
frequencies while
workin
g
throu
g
h a
Switches to the
“Home” (favorite
frequency) Channel.
None

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repeater.
[MR(SKIP)] Set the frequency
control to the Memory
Recall mode.
Activates the
“Memory “Tune”
mode while in the
Memory Recall mode.
Selects the Memory
Scan “Skip”
channel-selection
mode.
[V/M(PRI)] Set the frequency
control to the VFO
mode.
Select the VFO
between “VFO A” and
“VFO B” while in the
VFO mode.
Activates the Priority
(Dual Watch)
function.
Starts the
programmed VFO
scanner upward while
in the VFO mode.
Select the Memory
Bank while in the
Memory Recall mode.
[0(SET)%] Activates the Internet
Connection feature.
Frequency entry digit
“0.”
Engages the Set
(Menu) Mode.
Enables Internet
access code
selection.
[VFO(PRI)] Set the frequency
control to the VFO
mode.
Select the VFO
between “VFO A” and
“VFO B” while in the
VFO mode.
Activates the Priority
(Dual Watch)
function.
Starts the
programmed VFO
scanner upward while
in the VFO mode.
Select the Memory
Bank while in the
Memory Recall mode.
[F/W] Activates the
“Alternate” key
function.
Disables the
“Alternate” key
function.
Activates the
“Memory Write” mode
(for memory channel
storage).
*1: You can program the secondary (press [F/W] key +) function of the key to another function,
if desired. See page 57 for details.
*2: You can exchange the function between primary (press key) function and secondary
(press [F/W] key +) function, if desired. See page 74 for details.
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 specifically for that frequency range, as the supplied
antenna is necessarily a compromise outside the Amateur bands, 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

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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-83 Battery Pack
The FNB-83 is a high-performance Ni-MH battery providing high capacity in a compact
package. Under normal use, the FNB-83 may be used for approximately 300 charge cycles,
after which operating time may be expected to decrease. If you have an old battery pack
which is displaying capacity which has become diminished, you should replace the pack with
a new one.
Installation of the battery is easy and quick:
 Insert the battery pack into the battery compartment on the back of the radio while tilting
the Belt Clip outward, then close the Battery Pack Latch until it locks in place with a
“Click.”
 To remove the battery, turn the radio off and remove any protective cases. Open the
Battery Pack Latch on the bottom of the radio, then slide the battery downward and out
from the radio while tilting the Belt Clip out of the way.
Battery Charging
If the battery has never been used, or its charge is depleted, it may be charged by connecting
the NC-88 Overnight Battery Charger, as shown in the illustration, to the EXT DC jack. If only
12 ~ 16 Volt DC power is available, the optional E-DC-5B DC Adapter (with its cigarette
lighter plug) may also be used for charging the battery.
A fully-discharged pack will be charged completely in 10 hours. Disconnect the NC-88 from
the EXT DC jack and the AC line outlet.
Important Note
 The NC-88 is not designed to power the transceiver for operation (reception or
transmission).
 Do not leave the NC-88 connected to the transceiver for continuous periods in excess of
24 hours. Long term overcharging can degrade the Ni-MH battery pack and significantly
shorten its useful life.

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 Please be advised that the NC-88 may contribute noise to TV and radio reception in the
immediate vicinity, so we do not recommend its use adjacent to such devices.
Low Battery Indication
 As your battery discharges during use, the voltage will gradually become lower. When the
battery voltage is becoming too low for reliable operation, the “BATTERY” icon will blink
on the LCD display, indicating that the battery pack must be recharged before further use.
 Avoid recharging Ni-MH batteries before the “Low Battery” indicator is observed, as this
can degrade the charge capacity of your Ni-MH battery pack.
Installation of FBA-25A Alkaline Battery Case (option)
The optional FBA-25A Battery Case allows operation of the VX-120/170 using six “AA” size
Alkaline batteries.
When installing batteries, insert the (–) end first, then press in the (+) end so the battery
snaps into place. Always replace all six batteries at the same time, paying attention to the
polarity indicated inside the case.
The FBA-25A must not be used with rechargeable cells. The FBA-25A does not contain the
thermal and over-current protection circuits (provided in the “FNB” series of Ni-MH Battery
Packs) required when utilizing Ni-Cd and Ni-MH cells.
Note that the power output and battery life will be much shorter when using Alkaline AA cells.
They should be considered an emergency backup power source only, for this reason.
Interface of Packet TNCs
The VX-120/170 may be used for Packet operation, using the optional CT-44 microphone
adapter (available from your Yaesu dealer) for easy interconnection to commonly-available
connectors wired to your TNC. You may also build your own cable, using a four-conductor
miniature phone plug, per the diagram below.
The audio level from the receiver to the TNC may be adjusted by using the VOLUME knob,
as with voice operation. The input level to the VX-120/170 from the TNC should be adjusted
at the TNC side; the optimum input voltage is approximately 5 mV at 2000 Ohms.
Be sure to turn the transceiver and TNC off before connecting the cables, so as to prevent
voltage spikes from possibly damaging your transceiver.
When you are operating on Packet, switch the Receive Battery Saver OFF, as the “sleep”
cycle may “collide” with the beginning of an incoming Packet transmission, causing your TNC
not to receive the full data burst. See page 59 for details regarding Battery Saver setup.

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Operation
R. F. says:Hi! I’m R. F. Radio, and I’ll be helping you along as you learn the many features of
the VX-120/170. I know you’re anxious to get on the air, but I encourage you to read the
“Operation” section of this manual as thoroughly as possible, so you’ll get the most out of this
fantastic new transceiver. Now. . .let’s get operating!
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 ANTENNA jack.
 Rotate the top panel’s VOL/PWR knob out of the click-stop to turn on the radio. 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, turn the VOL/PWR knob fully counter-clockwise into the click stop
position.
Adjusting the Audio Volume Level and Squelch Setting
 At first, set the SQL knob fully counter-clockwise. Now, you may rotate the VOL/PWR
knob to adjust the receiver level for a comfortable listing level, using the background
noise as a reference.
 To set the squelch, turn the SQL knob clockwise, slightly past the point where the
background noise is muted. This is the point of best sensitivity to weak signals, and we
recommend that you not rotate the SQL knob very much past the point where the
background noise is just silenced.
R.F. Says: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 ?? for details.
2) If you’re operating in an area of high RF pollution, 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. Or, if your friends have radios equipped with DCS (Digital Coded Squelch) like
your VX-120/170 has, try using that mode for silent monitoring of busy channels.
Frequency Navigation
The VX-120/170 will initially be operating in the “VFO” mode, a channelized system which

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allows free tuning throughout the currently-selected operating band.
Three basic frequency navigation methods are available on the VX-120/170:
1) Tuning Dial
Rotation of the DIAL allows tuning in the pre-programmed steps established for the current
operating band. Clockwise rotation of the DIAL causes the VX-120/170 to be tuned toward a
higher frequency, while counter-clockwise rotation will lower the operating frequency.
If you press the [F/W] key momentarily, then rotate the DIAL, frequency steps of 1 MHz will be
selected. This feature is extremely useful for making rapid frequency excursions over the
wide tuning range of the VX-120/170.
2) Direct Keypad Frequency Entry (VX-170 only)
The desired operating frequency may be entered directly from the keypad.
To enter a frequency directly, just keying in the 10 MHz, 1 MHz, and the kHz digits.
Examples:
To enter 146.560 MHz, press [4] [6] [5] [6] [0]
To enter 146.5625 MHz (12.5 kHz steps), [4] [6] [5] [6] [2]
3) Scanning
Press and hold in either the [▲] or [▼] key for one second to initiate upward or downward
scanning, respectively (Manual VFO Scan).
For scanning within a limited sub-band range, from the VFO mode, press and hold in the
[MR(SKIP)] key for one second to begin scanning toward a higher frequency within the
previously-defined sub-band (Programmed VFO Scan). Details regarding sub-band setup
may be found on page ??.
If you wish to reverse the direction of the scan (i.e. toward a lower frequency, instead of a
higher frequency), just rotate the DIAL one click in the counter-clockwise direction while the
VX-120/170 is scanning. The scanning direction will be reversed. To revert to scanning
toward a higher frequency once more, rotate the DIAL one click clockwise.
The scanner will stop when it receives a signal strong enough to break through the Squelch
threshold. The VX-120/170 will then hold on that frequency according to the setting of the
“RESUME” mode (Set Mode Item 32: RESUME). Press the PTT switch momentarily to
cancel the scanning. This only stops the scan; it does not cause transmission to occur. See
page // for details regarding Scan Operation.
Transmission
Once you have set up an appropriate frequency inside the 144 MHz Amateur band on which

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the VX-120/170 can transmit, you’re ready to go on the air! These are the most basic steps;
more advanced aspects of transmitter operation will be discussed later.
 To transmit, press the PTT switch, and speak into the front panel microphone (located in
the lower left-hand corner of the speaker grille) in a normal voice level. The TX/BUSY
indicator will glow red during transmission.
 To return to the receive mode, release the PTT switch.
 During transmission, the relative power level will be indicated on the bar graph at the
bottom of the LCD; full scale deflection confirms “High Power” operation, while deflection
of two bars indicates “Low Power” operation. Five bars indicates “Medium Power”
operation. Additionally, the “LOW” icon will appear at the bottom of the display while
operating on the “Low Power” and “Medium Power” settings.
R.F. Says: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.
Changing the Transmitter Power Level
To change the power level:
 Press the [F/W] key, then press the [3(LOW)](VX-170) or [LOW(SET/LOCK)](VX-120)
key. The LCD shows the current power output level.
 Rotate the DIAL knob to select the desired power output level. Available selections are
“HIGH” (5 W), “MID” (2 W), and “LOW” (0.5 W).
 When you have made your choice, press the PTT switch to save the new setting and
return to normal operation.
R.F. Says:1) The VX-120/170 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, when press the PTT switch, to cause the VX-120/170 to transmit (temporarily) on High
power. After one transmission, the power level will revert to the previously-selected (“Low” or
“Medium” power) setting.
Advanced Operation
Now that you’re mastered the basics of VX-120/170 operation, let’s learn more about some of
the really neat features.

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Keyboard Locking
In order to prevent accidental frequency change or inadvertent transmission, various aspects
of the VX-120/170’s DIAL and keypad may be locked out. The possible lockout combinations
are:
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
To lock out some or all of the keys:
1. Press the [F/W] key, then press the [0(SET)] key to enter the Set mode.
2. Rotate the DIAL knob to select Set Mode Item 26: LOCK.
3. Press the [F/W] key momentarily to enable adjustment of this Item.
4. Rotate the DIAL knob to choose between one of the locking schemes as outlined above.
5. When you have made your selection, press the PTT switch to save the new setting and
return to normal operation.
To activate the locking feature, (1) press and hold in the [6(LOCK)] key for one second, or (2)
press the [F/W] key, followed by the [6(LOCK)] key. The “Key Lock” icon will appear on the
LCD. To cancel locking, repeat one of these process.
Keypad/LCD Illumination
Your VX-120/170 includes a reddish illumination lamp which aids in nighttime operation. 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 Mode: Illuminates the Keypad/LCD lamp for five seconds when you rotate the DIAL
knob or press the keypad or any switch (except PTT switch). This is the factory-programmed
default setting.
CONT Mode: Illuminates the Keypad/LCD lamp continuously.
OFF Mode: Disables the Keypad/LCD lamp.
Here is the procedure for setting up the Lamp operating mode:
1. Press the [F/W] key, then press the [(0)SET] key to enter the Set mode.
2. Rotate the DIAL knob to select Set Mode Item 25: LAMP.

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3. Press the [F/W] key momentarily to enable adjustment of this Item.
4. Rotate the DIAL knob to select one of the three modes described above.
5. When you have made your choice, press the PTT switch to save the new setting and
return to normal operation.
Disabling the Keypad Beeper
A keypad beeper provides useful audible feed back whenever a keypad is pressed.
If you want to turn the beep off:
1. Press the [F/W] key, then press the [%(0)SET] key to enter the Set mode.
2. Rotate the DIAL knob to select Set Mode Item 6: BEEP.
3. Press the [F/W] key momentarily to enable adjustment of this Item.
4. Rotate the DIAL knob to change the setting to “OFF.”
5. Press the PTT switch to save the new setting and return to normal operation.
6. To turn the beep back on again, select “KEY” or “KEY+SC (factory default)” in step 4
above.
KEY: The beeper sounds when you press the keypad.
KEY+SC: The beeper sounds when you press the keypad, or when the scanner stops.
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 [F/W] key, then press the [0(SET)] key to enter the Set mode.
2. Rotate the DIAL knob to select Set Mode Item 34: RF SQL.
3. Press the [F/W] key momentarily to enable adjustment of this Item.
4. Rotate the DIAL knob to select the desired signal strength level for the squelch threshold
(S-1, S-2, S-3, S-4, S-5, S-6, S-8, S-FULL, or OFF).
5. Press the PTT switch to save the new setting and return to normal operation.
Checking the Battery Voltage
The VX-120/170’s microprocessor includes programming which will measure the current
battery voltage.
1. Press the [F/W] key, then press the [%(0)SET] key to enter the Set mode.
2. Rotate the DIAL knob to select Set Mode Item 12: DC VLT.
3. Press the [F/W] key momentarily to display the current DC voltage being supplied.
4. Press the [F/W] key, followed by the PTT switch to return to normal operation.

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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 VX-120/170 includes a number of features which make repeater operation
simple and enjoyable.
Repeater Shifts
The VX-120/170 has been configured, at the factory, for the repeater shift set to 600 kHz.
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.
Automatic Repeater Shift (ARS)
The VX-120/170 provides a convenient Automatic Repeater Shift feature, which causes the
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 [F/W] key, then press the [0(SET)] key to enter the Set mode.
2. Rotate the DIAL knob to select Set Mode Item 4: ARS.
3. Press the [F/W] key momentarily to enable adjustment of this Item.
4. Rotate the DIAL knob to select “ARS. ON.”
5. When you have made your selection, press the PTT switch to save the new setting and
return to normal 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 [F/W] key, then press the [(4)RPT] key to enable selection of the repeater shift
direction.
2. This provides a “short-cut” to Set Mode Item 35: RPT.MOD.
3. Rotate the DIAL knob to select the desired shift among “RPT.–,” “RPT.+,” and
“RPT.OFF.”

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4. When you have made your selection, press the PTT switch to save the new setting and
return to normal operation.
R. F. Says: 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.
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 [F/W] key, then press the [0(SET)] key to enter the Set mode.
2. Rotate the DIAL knob to select Set Mode Item 41: SHIFT.
3. Press the [F/W] key momentarily to enable adjustment of this Item.
4. Rotate the DIAL knob to select the new repeater shift magnitude.
5. When you have made your selection, press the PTT switch to save the new setting and
return to normal operation.
R.F. Says: 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 ??.
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 [REV(HOME)] key. You’ll notice that the display has shifted to the
repeater uplink frequency. Press the [REV(HOME)] key again to cause operation to revert to
normal monitoring of the repeater downlink (output) frequency. While you are listening on the
input frequency to the repeater using the [REV(HOME)] key, the repeater offset icon will
blink.
R. F. Says:The configuration of this key may be set either to “RV” (for checking the input
frequency of a repeater), or “HM” (for instant switching to the “Home” channel for the band
you are operating on). To change the configuration of this key, use Set Mode Item 33:
REV/HM. See page 75.
VFO Split Mode

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For working on repeaters with odd splits, or communicating with astronauts on orbiting space
vehicles, it may be necessary to use non-standard splits between the receive and transmit
frequency. If the application is infrequent enough not to warrant the dedication of a memory
channel for this purpose, the “VFO Split” mode may be used. Here is the procedure:
1. Press the [VFO(PRI)] key, as needed, to select VFO-A. Set VFO-A for the receiving
2. Now press the [VFO(PRI)] key, and set VFO-B for the desired transmit frequency (e.g.
144.750 MHz).
3. Press the [VFO(PRI)] key once more to re-establish VFO-A as the “Main” (receive) VFO.
4. Press the [F/W] key, then press the [0(SET)] key to enter the Set mode.
5. Rotate the DIAL to select Set Mode Item 43: SPLIT.
6. Press the [F/W] key, then rotate the DIAL to set this function “ON.”
7. Press the PTT key once to save the new setting and exit to normal operation.
8. You will now be operating in a Split mode. When you press the PTT key to transmit, you
will observe that VFO-A and VFO-B will reverse positions. The VFO selection indicator
“-b-” will blinks while the transceiver is transmitting, this means that the VFO Split feature
is now activated.
9. If you need to modify the VFO-B (transmit) frequency (for Doppler Shift correction, etc.),
just press the [VFO(PRI)] key, then make the necessary change, then press [VFO(PRI)]
key once more to restore VFO-A to the “receive VFO” position.
10. When you have finished with Split operation, re-enter the Set mode, and set Set Mode
Item 43: SPLIT to “OFF.”
A split frequency pair set up via the VFO Split feature cannot be stored directly into memory.
You can, however, store odd frequency pairs using a different (slightly simpler) procedure.
See page ??.
CTCSS/DCS/EPCS 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 VX-120/170, and is
very easy to activate.
R.F. Says:CTCSS setup involves two actions: setting the Tone Mode and then setting of the
Tone Frequency. These actions are set up by using the [1(SQ TYP)] key and [2(CODE)]
keys.

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1. Press the [F/W] key, then press the [1(SQ TYP)] key to enable selection of the
CTCSS/DCS/ECS mode.
2. Rotate the DIAL knob so that “TONE” indication appears on the display; this activates
the CTCSS Encoder, for access to repeaters requiring a CTCSS tone.
3. Rotation of the DIAL knob one more “click” in step “2” above will cause the “TSQL”
notation to appear. When “TSQL” is displayed, this means that the Tone SQueLch
system is active, which mutes your VX-120/170’s receiver until it receives a call from
another radio sending out a matching CTCSS tone. This can help keep your radio quiet
until a specific call is received, which may be helpful while operating in congested areas
of the band.
R.F. Says: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 VX-120/170’s receiver (instead of opening the squelch) when it
receives a call from the radio sending a matched CTCSS tone. The “TSQ” icon will blink
on the display when the Reverse Tone Squelch system is activated.
2) You may notice the “DCS” and “ECS” indications on the display while you rotate the
DIAL knob still more. We’ll discuss the Digital Code Squelch system (for “DCS”) and
Enhanced Paging & Code Squelch (for “ECS”) later.
5. When you have made your selection of the CTCSS tone mode, press the PTT switch to
save the new setting.
6. Press the [F/W] key, then press the [2(CODE)] key to enable adjustment of the CTCSS
frequency.
7. Rotate the DIAL knob until the display indicates the Tone Frequency you need to be
using (ask the repeater owner/operator if you don’t know the tone frequency).
8. When you have made your selection, press the [F/W] key momentarily to save the new
settings and exit to normal operation. This is different than the usual method of restoring
normal operation, and it applies only to the configuration of the CTCSS/DCS
frequencies.
R.F. Says: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 deflects, but the VX-120/170 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 traffic on the
channel being utilized.

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DCS Operation
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 VX-120/170, and operation is very
similar to that just described for CTCSS. Your repeater system may be configured for DCS; if
not, DCS is frequently quite useful in Simplex operation if your friend(s) use transceivers
equipped with this advanced feature.
R.F. Says: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 [F/W] key, then press the [1(SQ TYP)] key to enable selection of the
CTCSS/DCS/ECS mode.
2. Rotate the DIAL knob until the “DCS” indication appears on the display; this activates the
DCS Encoder/Decoder.
3. Press the PTT key to save the new setting.
4. Press the [F/W] key, then press the [2(CODE)] key to enable adjustment of the DCS
code.
5. Rotate the DIAL knob to select 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).
6. When you have made your selection, press the [F/W] key momentarily to save the new
settings and exit to normal operation.
R.F. Says: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!
Tone Search Scanning
In operating situations where you don’t know the CTCSS or DCS tone being used by another
station or stations, you can command the radio to listen to the incoming signal and scan in
search of the tone being used. Two things must be remembered in this regard:
 You must be sure that your repeater uses the same tone type (CTCSS vs. DCS).
 Some repeaters do not pass the CTCSS tone; you may have to listen to the station(s)
transmitting on the repeater uplink (input) frequency in order to allow Tone Search
Scanning to work.
To scan for the tone in use:

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1. Set the radio up for either CTCSS or DCS Decoder operation (see the previous
discussions). In the case of CTCSS, “T SQ” will appear on the display; in the case of
DCS, “DCS” will appear on the display.
2. Press the [F/W] key, then press the [2(CODE)] key.
3. Press and hold in the [] or [] key for one second to start scanning for the incoming
CTCSS or DCS tone/code.
4. When the radio detects the correct tone or code, it will halt on that tone/code, and audio
will be allowed to pass. Press the [F/W] key to lock in that tone/code, then press the
[F/W] key again to exit to normal operation.
R.F. Says:If the Tone Scan feature does not detect a tone or code, it will continue to scan
indefinitely. When this happens, it may be that the other station is not sending any tone. You
can press the PTT switch to halt the scan at any time.
You also can press the MONI key during Tone Scanning to listen to the (muted) signal from
the other station. When you release the MONI key, Tone Scanning will resume after about a
second.
Tone Scanning works either in the VFO or Memory modes.
EPCS (Enhanced Paging & Code Squelch)
The VX-120/170 includes an Enhanced CTCSS tone encoder/decoder and a dedicated
microprocessor providing paging and selective calling feature. This allows you to place a call
to a specific station (Paging), and to receive calls of your choice directed only to you (Code
Squelch).
The paging and code squelch systems use two pairs of (alternately switched) CTCSS tones
which are stored in the pager memories. Basically, your receiver remains silent until it
receives the CTCSS tone pair that matches those stored in the Receiving Pager Memory.
The squelch then opens so the caller is heard, and the paging ringer immediately sounds, if
activated. When you close the PTT switch to transmit, the CTCSS tone pair which is stored in
the Transmitting Pager Memory will be transmitted automatically.
On the paged radio, the squelch will close automatically after the incoming page ends.
Meanwhile, on the paging radio, the Enhanced Paging and Code Squelch system will be
disabled after the PTT key is released after the paging transmission. You may re-activate the
Enhanced Paging and Code Squelch system again using Set Mode Item 29: PAGER, if
desired.
Storing the CTCSS Tone Pairs for EPCS Operation

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1. Press the [F/W] key, then press the [0(SET)] key to enter the Set mode.
2. Rotate the DIAL knob to select Set Mode Item 18: ECS.CDR for the Receiving CTCSS
Tone Pair or Set Mode Item 19: ECS.CDT for the Transmitting CTCSS Tone Pair.
3. Press the [F/W] key momentarily to enable adjustment of this Set Mode Item.
4. Rotate the DIAL knob to set the CTCSS Tone number which corresponds to the first tone
of the CTCSS Tone Pair.
5. Press the [] or [] key, then rotate the DIAL knob to set the CTCSS Tone number which
corresponds to the second tone of the CTCSS Tone Pair.
6. Press the PTT switch to save the new setting and exit to normal operation.
CTCSS Tone Number
01 67.0 11 94.8 21 131.8 31 171.3 41 203.5
02 69.3 12 97.4 22 136.5 32 173.8 42 206.5
03 71.9 13 100.0 23 141.3 33 177.3 43 210.7
04 74.4 14 103.5 24 146.2 34 179.9 44 218.1
05 77.0 15 107.2 25 151.4 35 183.5 45 225.7
06 79.7 16 110.9 26 156.7 36 186.2 46 229.1
07 82.5 17 114.8 27 159.8 37 189.9 47 233.6
08 85.4 18 118.8 28 162.2 38 192.8 48 241.8
09 88.5 19 123.0 29 165.5 39 196.6 49 250.3
10 91.5 20 127.3 30 167.9 40 199.5 50 251.4
R.F. Says:The VX-120/170 does not recognize the order of the 1st tone and the 2nd tone. In
other words, for example, the VX-120/170 considers both CTCSS pairs “10, 35” and “35, 10”
to be identical.
Activating the Enhanced Paging & Code Squelch System
1. Press the [F/W] key, then press the [1(SQ TYP)] key to enable selection of the
CTCSS/DCS/ECS mode.
2. Rotate the DIAL knob so that “ECS” indication appears on the display.
3. Press the PTT switch to save the new setting and activate the Enhanced Paging & Code
Squelch.
4. To disable the Enhanced Paging & Code Squelch, just repeat the above procedure,
rotating the DIAL knob to select “OFF” in step 2 above.
When the Enhanced Paging & Code Squelch feature is activated, the “SQ” icon will blink on
the display.
Paging Answer Back
When you press the PTT switch to respond to a page call, the VX-120/170 transmits the
same CTCSS tone pair. This tone pair will open the Code Squelch of the calling station. If you
prefer, you can have the VX-120/170 respond to page calls automatically (“transpond”).