Vertex Standard VX-920 series User manual

VX-920/-970
S ERIES
OPERATING MANUAL
16 Key Version 4 Key Version Non-LCD Version
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARD
US Headquarters
10900 Walker Street, Cypress, CA 90630, U.S.A.
YAESU EUROPE B.V.
P.O. Box 75525, 1118 ZN Schiphol, The Netherlands
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
VERTEX STANDARD HK LTD.
Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,
Kwun Tong, Kowloon, Hong Kong
VERTEX STANDARD (AUSTRALIA)PTY., LTD.
Normanby Business Park, Unit 14/45 Normanby Road
Notting Hill 3168, Victoria, Australia

Note ................................................................................. 1
Warning! FCC RF Exposure Requirements ............... 2
Controls & Connectors (16-Key Version) ................... 4
Controls & Connectors (4-Key Version) ..................... 5
Controls & Connectors (Non-LCD Version) ............... 6
LCD Icons & Indicators (16-Key & 4-Key Versions) 7
Before You Begin ........................................................... 8
Battery Pack Installation and Removal ...................... 8
Low Battery Indication .............................................. 8
Battery Charging ........................................................ 9
Operation ..................................................................... 10
Preliminary Steps ..................................................... 10
Operation Quick Start .............................................. 10
Advanced Operation ................................................... 13
Programmable Key and Toggle Switch Functions .. 13
Descriptipon of Operating Functions ...................... 16
LOCK ........................................................................... 25
ARTS (Auto Range Transpond System) ................... 25
DTMF Paging System ................................................. 25
User Set Mode (16-Key & 4-Key Versions) ............... 26
Optional Accessories.................................................... 27
CONTENTS
Congratulations!
You now have at your fingertips a valuable communications tool-a VERTEX STANDARD two-way radio! Rugged,
reliable and easy to use, your VERTEX STANDARD radio will keep you in constant touch with your colleagues for
years to come, with negligible maintenance down-time.
Please take a few minutes to read this manual carefully. The information presented here will allow you to derive
maximum performance from your radio, in case questions arise later on.
We're glad you joined the VERTEX STANDARD team. Call on us anytime, because communications is our business.
Let us help you get your message across.
Notice!: There are no owner-serviceable parts inside the radio. All service jobs must be referred to an
authorized VERTEX STANDARD Service Representative. Consult your Authorized VERTEX STANDARD
Dealer for installation of optional accessories.

VX-920/-970 SERIES OPERATING MANUAL 1
Important Notice for North American Users Regarding 406 MHz Guard Band
The U.S. Coast Guard and National Oceanographic and Atmospheric Administration have requested the
cooperation of the U.S. Federal Communications Commission in preserving the integrity of the protected
frequency range 406.0 to 406.1 MHz, which is reserved for use by distress beacons. Do not attempt to
program this apparatus, under any circumstances, for operation in the frequency range 406.0 - 406.1 MHz if
the apparatus is to be used in or near North America.
Warning - Frequency band 406 - 406.1 MHz is reserved for use ONLY as a distress beacon by the US
Coast Guard and NOAA. Under no circumstance should this frequency band be part of the
preprogrammed operating frequencies of this radio.
NOTE
In order to maintain the specified water integrity performance, periodic maintenance is recommended.
Should the radio sustain a severe shock (e.g. if it is dropped), the water integrity may be compromised,
requiring service. Should this occur, contact your Authorized Vertex Dealer or Vertex Standard USA, Inc.
Intrinsic Safety (IS) Information
IS version of the VX-920/-970, equipped with any of the following optional units, meets the requirements of
ANSI/UL 913 6th Edition for Class I, Division 1, Groups A-D; Class II, Groups E-G; and Class III for
hazardous locations.
Battery Packs: FNB-V92LIIS
Speaker Microphone: MH-50D7A, MH-66A7A, MH-66B7A
Headset/Earoice Microphone: VH-111, VH-121, VH-131
Encryption Unit: FVP-35, FVP-36
ANI Unit: VME-100, VMDE-200
Voice Storage Unit: DVS-5
Multi Band Receiver Unit: SRX-3, SRX-4
Substitution of components may impair intrinsic safety. Installation of FNB-V92LIIS does NOT convert
normal radio into IS version.

VX-920/-970 SERIES OPERATING MANUAL
2
WARNING! FCC RF EXPOSURE REQUIREMENTS
This Radio has been tested and complies with the Federal Communications Commission (FCC) RF exposure
limits for Occupational Use/Controlled exposure environment. In addition, it complies with the following Stan-
dards and Guidelines:
FCC 96-326, Guidelines for Evaluating the Environmental Effects of Radio-Frequency Radiation.
FCC OET Bulletin 65 Edition 97-01 (1997) Supplement C, Evaluating Compliance with FCC Guidelines for
Human Exposure to Radio Frequency Electromagnetic Fields.
ANSI/IEEE C95.1-1992, IEEE Standard for Safety Levels with Respect to Human Exposure to Radio
Frequency Electromagnetic Fields, 3 kHz to 300 GHz.
ANSI/IEEE C95.3-1992, IEEE Recommended Practice for the Measurement of Potentially Hazardous Elec-
tromagnetic Fields - RF and Microwave.
WARNING:
This radio generates RF electromagnetic energy during transmit mode. This radio is designed for and
classified as Occupational Use Only, meaning it must be used only during the course of employment by
individuals aware of the hazards, and the ways to minimize such hazards. This radio is not intended for use
by the General Population in an uncontrolled environment.
CAUTION:
To ensure that your expose to RF electromagnetic energy is within the FCC allowable limits for occupa-
tional use, always adhere to the following guidelines:
This radio is NOT approved for use by the general population in an uncontrolled exposure envi-
ronment. This radio is restricted to occupational use, work related operations only where the
radio operator must have the knowledge to control his or her RF exposure conditions.
When transmitting, hold the radio in a vertical position with its microphone 2 inches (5 cm) away
from your mouth and keep the antenna at least 2 inches (5 cm) away from your head and body.

VX-920/-970 SERIES OPERATING MANUAL 3
The radio must be used with a maximum operating duty cycle not exceeding 50%, in typical
Push-to-Talk configurations.
DO NOT transmit for more than 50% of total radio use time (50% duty cycle). Transmitting
more than 50% of the time can cause FCC RF exposure compliance requirements to be ex-
ceeded.
The radio is transmitting when the red LED on the top of the radio is illuminated. You can cause
the radio to transmit by pressing the P-T-T button.
SAR compliance for body-worn use was only demonstrated for the specific belt-clip Part Number
(CLIP-920). Other body-worn accessories or configurations may NOT comply with the FCC RF
exposure requirements and should be avoided.
DO NOT transmit when the radio is used in Body Worn configuration with the following acces-
sory: belt-clip.
It must be used ONLY for (1) there is 4 cm distance from the body during transmitting, (2)
monitoring purposes, using the speaker only and (3) for carrying purposes.
Always use Vertex Standard authorized accessories.
The information listed above provides the user with the information needed to make him or her
aware of RF exposure, and what to do to assure that this radio operates with the FCC RF expo-
sure limits of this radio.
Electromagnetic Interference/Compatibility
During transmissions, this radio generates RF energy that can possibly cause interference with
other devices or systems. To avoid such interference, turn off the radio in areas where signs are
posted to do so.
Do not operate the transmitter in areas that are sensitive to electromagnetic radiation such as
hospitals, health care facilities, aircraft, and blasting sites.
WARNING! FCC RF EXPOSURE REQUIREMENTS

VX-920/-970 SERIES OPERATING MANUAL
4
CONTROLS & CONNECTORS (16-KEY VERSION)
SIDE SEL Key
PTT Switch
MONITOR Button
LAMP Key
MIC/SP Jack
(External MIC/SP)
Sub Microphone
(Noise Canceling MIC)
Battery Pack LatchLCD (Liquid Crystal Display)
SpeakerMain Microphone
LED Indicator
Steady Red:
Transmitting in progress
Steady Green:
Tone Squelch in defeated condition
Blinking Green:
Busy Channel
Dealer Programmed ColorÚ:
Emergency, 5-Tone Decoded, or
2-Tone Decoded
16-Button DTMF Keypad
Antenna Jack
TOP SEL Key
CH (Channel)Selector
VOL/PWR Knob
TOGGLE Switch
Ú: one of “Flashing in white,”
“Continuation changes in
sequential colors,” or “tog-
gling the two colors.”

VX-920/-970 SERIES OPERATING MANUAL 5
CONTROLS & CONNECTORS (4-KEY VERSION)
SIDE SEL Key
PTT Switch
MONITOR Button
LAMP Key
MIC/SP Jack
(External MIC/SP)
Sub Microphone
(Noise Canceling MIC)
Battery Pack LatchLCD (Liquid Crystal Display)
SpeakerMain Microphone
LED Indicator
Steady Red:
Transmitting in progress
Steady Green:
Tone Squelch in defeated condition
Blinking Green:
Busy Channel
Dealer Programmed ColorÚ:
Emergency, 5-Tone Decoded, or
2-Tone Decoded
4-Button Programmable Key
Antenna Jack
TOP SEL Key
CH (Channel)Selector
VOL/PWR Knob
TOGGLE Switch
Ú: one of “Flashing in white,”
“Continuation changes in
sequential colors,” or “tog-
gling the two colors.”

VX-920/-970 SERIES OPERATING MANUAL
6
CONTROLS & CONNECTORS (NON-LCD VERSION)
SIDE SEL Key
PTT Switch
MONITOR Button
LAMP Key
MIC/SP Jack
(External MIC/SP)
Sub Microphone
(Noise Canceling
MIC)
Battery Pack Latch
SpeakerMain Microphone
LED Indicator
Steady Red:
Transmitting in progress
Steady Green:
Tone Squelch in defeated condition
Blinking Green:
Busy Channel
Dealer Programmed ColorÚ:
Emergency, 5-Tone Decoded, or
2-Tone Decoded
Antenna Jack
TOP SEL Key
CH (Channel)Selector
VOL/PWR Knob
TOGGLE Switch
Ú: one of “Flashing in white,”
“Continuation changes in
sequential colors,” or “tog-
gling the two colors.”

VX-920/-970 SERIES OPERATING MANUAL 7
LCD ICONS & INDICATORS (16-KEY & 4-KEY VERSIONS)
12 Character Alpha-numeric Display
SUB-LCD
888: Channel Group Number
-P-: Priority Channel
-H-: Home Channel
In: ARTS “In Range”
Out: ARTS “Out of Range”
RSSI Indicator (four steps)
Encryption is activated
Option SW (Key Function)
is activated
Low Transmit Power Mode On
“DUAL WATCH” is activated
This channel is on “SCAN” List
Priority Scan is activated
“CALL” Indicator Receiver Monitor
“Talk-Around” is enabled
“Voice Message” is received
Battery Indicator
“Group Scan” is enabled
BATTERY TERMINALS
VHF Model UHF Model
Maximum Input Voltage: 8.4 V DC 8.4 V DC
Maximum Input Current: 2.5 A 2.5 A
Maximum Input Power: 21 W 21 W
Maximum Internal Capacitance: 51.31 μF 51.28 μF
Maximum Internal Inductance: 5.50 μH 5.48 μH

VX-920/-970 SERIES OPERATING MANUAL
8
BEFORE YOU BEGIN
Battery Pack Installation and Removal
To install the battery, hold the transceiver with your
left hand, so your palm is over the speaker and
your thumb is on the top of the belt clip. Carefully
mate the battery’s four insertion slots with their
corresponding alignment tabs on the transceiver
case, while tilting the Belt Clip outward. Proper
alignment occurs with the battery pack offset about
1/2 inch from the top edge of the battery com-
partment.
Guide the pack on to the tabs with a slight inward
pressure, then slide the battery pack upward, un-
til it locks in place with a “Click.”
To remove the battery, turn the radio off and re-
move any protective cases. Slide the Battery Pack
Latch on the bottom of the radio toward the front
panel while sliding the battery down about 1/2 inch.
Then lift the battery out from the radio while un-
folding the Belt Clip.
Do not attempt to open any of the re-
chargeable Lithium-Ion packs, as they
could explode if accidentally short-circuited.
Low Battery Indication
As the battery discharges during use, the voltage
gradually becomes lower. When the battery voltage
becomes to low, substitute a freshly charged battery
and recharge the depleted pack. The LED indicator
on the top of the radio will blink red when the battery
voltage is low.
Caution
Danger of explosion if battery is replaced with
an incorrect battery. Replace only with the same
or equivalent type.
Tilt the Belt Clip
Insert the Battery Pack

VX-920/-970 SERIES OPERATING MANUAL 9
BEFORE YOU BEGIN
Battery Charging
Insert the DC plug from the PA-42 AC Adapter
into the DC jack on the bottom side of the VAC-
920 Desktop Rapid Charger, then plug the PA-42
AC Adapter into the AC line outlet.
Insert the battery pack into the VAC-920 Desk-
top Rapid Charger while aligning the slots of the
battery pack with the guides in the nest of the
VAC-920; refer to the illustration at the right for
details on proper positioning of the pack. If charg-
ing with the transceiver attached, turn the trans-
ceiver off, and the antenna jack should be at the
left side when viewing the charger from the front.
If the battery pack is inserted correctly, the LED
indicator will glow red. A fully-discharged pack
will be charged completely in approximately 1.5
hours (FNB-V86LI, 2.5 hours: FNB-V87LI/
FNB-V92LIIS).
The LED indicator will blink red/green alternately
when charging is nearing completion.
When charging is completed, the LED indicator
will change to green. Even if the charging is com-
pleted, the LED indicator will sometimes change
to red for trickle charging.
Disconnect the pack from the VAC-920 Desktop
WARNING
The FBA-34 was designed as a backup bat-
tery pack, and it can be used to power the
transceiver if you are in an area that does not
require the use of an intrinsically safe radio.
The VX-920/-970 is only intrinsically safe with
the use of the FNB-V92LIIS battery pack.
Do not reverse-connect the battery terminals.
Do not parallel-connect the battery terminals.
Do not change batteries in hazardous loca-
tions.
To reduce the risk of explosion, recharge the
batteries outside of hazardous locations.
Align the slots of the battery pack
with the guides in the nest of the
VAC-920 Desktop Rapid Charger.
Rapid Charger, and unplug the PA-42 ACAdapter
from the AC line outlet.

VX-920/-970 SERIES OPERATING MANUAL
10
OPERATION
Preliminary Steps
Install a charged battery pack
onto the transceiver, as de-
scribed previously.
Screw the supplied antenna
onto the Antenna jack. Never
attempt to operate this trans-
ceiver without an antenna con-
nected.
If you have a Speaker/Micro-
phone, we recommend that it not be connected
until you are familiar with the basic operation of
the VX-920/-970.
Operation Quick Start
Turn the top panel’s
VOL/PWR knob clock-
wise to turn the radio on.
Turn the top panel’s CH
selector knob to choose
the desired operating
channel. On the 16-key
and 4-key versions, a
channel name will appear
on the LCD.
If you want to select the operating channel from
a different Memory Channel Group, press the Pro-
grammable key (assigned to the Memory Group
Up or Down function) to select the Memory Chan-
nel Group you want before selecting the operat-
ing channel. A Group name will appear on the LCD
whenever the Programmable key is pressed.
Note: Some models are programmed so that the
operating channels are selected by the Program-
mable key and the memory channel group is se-
lected by the CH selector knob. For further de-
tails, contact your VERTEX STANDARD dealer.
ÆÆ Æ

VX-920/-970 SERIES OPERATING MANUAL 11
Rotate the VOL/PWR
knob to set the volume
level. If no signal is
present, press and hold in
the MONITOR button
(under the PTT switch)
more than 2 seconds;
background noise will
now be heard, and you
may use this to set the
VOL/PWR knob for the
desired audio level. Press
and hold the MONITOR button more than 2 sec-
onds (or press the MONITOR button twice) to
quiet the noise and resume normal (quiet) moni-
toring.
To transmit, monitor the
channel and make sure it
is clear.
Press and hold the PTT
switch. Speak into the mi-
crophone area of the front
panel grille (above the upper left edge of the LCD)
in a normal voice level. To return to the Receive
mode, release the PTT switch.
Press the (Orange) TOP
SEL key or SIDE SEL
key (above the PTT
switch) to activate one of
the preprogrammed func-
tions which may have
been enabled at the time
of programming by the
dealer. See the next sec-
tion for details regarding
the available features.
Switch the top panel’s
TOGGLE switch to the
[A], [B], or [Center]
position to activate one of
the pre-programmed
functions which may
have been enabled at the time of programming by
the dealer. When this switch is in the [A(left)],
[B(right)], or [Center]position, the feature pro-
grammed (by your dealer) to that switch position
will be activated. See the next section for details
regarding the available features.
OPERATION

VX-920/-970 SERIES OPERATING MANUAL
12
If a Speaker/Microphone is available, remove the
plastic cap and its two mounting screws from the
right side of the transceiver, then align the con-
nector of the Speaker/Microphone on the trans-
ceiver body; secure the connector pin using the
screws supplied with the
Speaker/Microphone. Hold the
speaker grille up next to your
ear while receiving. To trans-
mit, press the PTT switch on
the Speaker/Microphone, just
as you would on the main
transceiver’s body, and speak
into the microphone on a nor-
mal voice level.
Note 1): Save the original plastic cap and its
mounting screws. They should be reinstalled
when not using the Speaker/Microphone.
2) When you press the PTT switch on the
Speaker/Microphone, it disables the internal
microphone, and vice versa.
Do not remove/install the Speaker/Micro-
phone in a hazardous location.
If the Busy Channel Lockout feature has been pro-
grammed on a channel, the radio will not transmit
when a carrier is present. Instead, the radio will
generate short beep three times and indicate
“*CH BusyCH Busy
CH BusyCH Busy
CH Busy *” on the display (16-key and 4-
key versions). Release the PTT switch and wait
for the channel to be clear of activity.
If CTCSS or Digital Coded Squelch (DCS) Lock-
out has been programmed on a channel, the radio
can transmit only when there is no carrier being
received or when the carrier being received in-
cludes the correct CTCSS tone or DCS code.
Automatic Time-Out Timer
If the selected channel has been programmed for au-
tomatic time-out, you must limit the length of each
transmission. While transmitting, a beep will sound
10 seconds before time-out. Another beep will sound
just before the deadline; the “TX” indicator will dis-
appear and transmission will cease soon thereafter.
To resume transmitting, you must release the PTT
switch and wait for the “penalty timer” to expire.
OPERATION

VX-920/-970 SERIES OPERATING MANUAL 13
ADVANCED OPERATION
Programmable Key and Toggle Switch Functions
All versions of the VX-920/-970 include the TOP
SEL, SIDE SEL, MONITOR, and LAMP keys, and
the TOGGLE switch. The 16-key and 4-key ver-
sions include the [A], [B], [C], and [D]function keys.
Furthermore, the 16-key version includes the [½]and
[#]function keys. The Programmable key and
TOGGLE switch functions can be customized, via
programming by your VERTEX STANDARD dealer,
to meet your communications/network requirements.
Some features may require the purchase and instal-
lation of optional internal accessories. The possible
Programmable key and TOGGLE switch program-
ming features are illustrated at the right, and their
functions are explained on page 15. For further de-
tails, contact your VERTEX STANDARD dealer.
For future reference, check the box next to each func-
tion that has been assigned to the Programmable key
and TOGGLE switch on your particular radio, and
keep it handy.
Ú1:Requires FVP-36 Encryption Unit
Ú2:This function can not be selected on the Non-LCD Version
Ú3:This function is only selected on the 16-key Version
Ú4:Requires DVS-5 Voice Storage Unit
FUNCTION
None
Scan
Dual Watch
Low Power
Talk Around
TX Save Disable
EncryptionÚ1
Follow-Me Scan
Lock
Audio PC (PIC)
Clear Voice
Group Recall Shortcut
A
TOGGLE SWITCH (POSITION)
Center B
Group 1
Group 2
Group 3
Group 1
Group 2
Group 3
Group 1
Group 2
Group 3

VX-920/-970 SERIES OPERATING MANUAL
14
TOP SEL
FUNCTION
None
Monitor
LampÚ2
Scan
Dual Watch
Low Power
Talk Around
TX Save Disable
EncryptionÚ1
Follow-Me Scan
Lock
Audio PC (PIC)
Follow-Me Dual Watch
Group UpÚ2
Group DownÚ2
Channel UpÚ2
Channel DownÚ2
SetÚ2
Call/Reset
Call 1
Call 2
Call 3
Call 4
Call 5
Code UpÚ2
Code DownÚ2
Code SetÚ2
Speed DialÚ3
Option SW 1
Option SW 2
Emergency
HomeÚ2
Selectable ToneÚ2
SIDE SEL MONITOR LAMP [A] [B] [C] [D]
PROGRAMMABLE KEY
[½½
½½
½] [#]
16-KEY & 4-KEY VERSIONS 16-KEY VERSION
ADVANCED OPERATION

VX-920/-970 SERIES OPERATING MANUAL 15
ADVANCED OPERATION
FUNCTION
Direct Channel #1Ú2
Direct Channel #2Ú2
Direct Channel #3Ú2
Direct Channel #4Ú2
REC/PLAYÚ4
RECÚ4
PLAYÚ4
SQLÚ2
AF Min Volume
Status SetÚ2
Status UpÚ2
Status DownÚ2
Status CheckÚ2
Lone Worker
DTMF Code SetÚ3
TA Scan
Priority Disable
Beep On/Off
Whisper
Duty
TOP SEL SIDE SEL MONITOR LAMP [A] [B] [C] [D]
PROGRAMMABLE KEY
[½½
½½
½] [#]
16-KEY & 4-KEY VERSIONS 16-KEY VERSION
Ú1:Requires FVP-36 Encryption Unit
Ú2:This function can not be selected on the Non-LCD Version
Ú3:This function is only selected on the 16-key Version
Ú4:Requires DVS-5 Voice Storage Unit

VX-920/-970 SERIES OPERATING MANUAL
16
Description of Operating Functions
MONITOR
Press the assigned programmable key to cancel
CTCSS- and DCS-controlled squelch; the BUSY/
TX indicator will glow green. Press and hold this but-
ton for 1.5 seconds to hear background noise (unmute
the audio); the BUSY/TX indicator will blink green.
LAMP
Press the assigned programmable key to illuminate
the LCD for five seconds.
SCAN
The Scanning feature is used to monitor multiple sig-
nals programmed into the transceiver. While scan-
ning, the transceiver will check each channel for the
presence of a signal, and will stop on a channel if a
signal is present.
To activate scanning:
Press the assigned programmable key, or set the
toggle switch to the assigned position to activate
scanning.
The scanner will search the channels of each chan-
nel, looking for active ones; it will pause each time
it finds a channel on which someone is speaking.
Press the assigned programmable key again, or
set the toggle switch to a different position to dis-
able scanning. Operation will revert to the pro-
grammed revert channel.
Note: Your dealer may have programmed your radio
to stay on one of the following channels if you press
the PTT switch during scanning pause:
Current channel (“Talk Back”)
“Last Busy” channel
“Priority” channel
“Home” channel
“Scan Start” channel
ADVANCED OPERATION

VX-920/-970 SERIES OPERATING MANUAL 17
DUAL WATCH
The Dual Watch feature is similar to the SCAN fea-
ture, except that only two channels are monitored:
The current operating channel; and
The Priority channel.
To activate Dual Watch:
Press the assigned programmable key, or set the
toggle switch to the assigned position.
The scanner will search the two channels; it will
pause each time it finds a channel on which some-
one is speaking.
To stop Dual Watch:
Press the assigned programmable key, or set the
toggle switch to a different position.
Operation will revert to the “Dual Watch Start”
channel.
LOW POWER
Press the assigned programmable key, or set the
toggle switch to the assigned position to set the
radio’s transmitter to the “Low Power” mode, thus
extending battery life. Press the key again, or set the
toggle switch to a different position to return to “Nor-
mal” transmit power when in difficult terrain.
In the 16-key and 4-key versions, the “ ” icon will
be indicated on the display when the radio’s transmit-
ter is set to the “Low Power” mode.
TALK AROUND (TA)
Press the assigned programmable key, or set the toggle
switch to the assigned position to activate the Talk
Around feature when you are operating on duplex
channel systems (separate receive and transmit fre-
quencies, utilizing a “repeater” station). The Talk
Around feature allows you to bypass the repeater sta-
tion and talk directly to a station that is nearby. This
feature has no effect when you are operating on “sim-
plex” channels, where the receive and transmit fre-
quencies are already the same.
In the 16-Key and 4-Key versions, the “ ” icon will
be indicated on the display when the “TA” function
is activated.
Note that your dealer may have mode provision for
“Talk Around” channels by programming “repeater”
and “Talk Around” frequencies on two adjacent chan-
nels. If so, the key may be used for one of the other
Pre-Programmed Functions.
ADVANCED OPERATION

VX-920/-970 SERIES OPERATING MANUAL
18
TX SAVE DISABLE
Press the assigned programmable key, or set the toggle
switch to the assigned position to disable the Trans-
mit Battery Saver, if you are operating in a location
where high power is almost always needed.
The Transmit Battery Saver helps extend battery life
by reducing transmit power when a very strong sig-
nal from an apparently nearby station is being re-
ceived. Under some circumstances, though, your
hand-held radio may not be heard well at the other
end of the communication path, and high power may
be necessary at all times.
ENCRYPTION (OPTION)
When the Voice Scrambler feature is enabled, press
the assigned programmable key to toggle the voice
encryption on and off.
LOCK
Press the assigned programmable key, or set the toggle
switch to the assigned position to lock the VX-920/-
970’s knob, programmable keys, and PTT switch.
The precise lockout configulation is programmed by
your Dealer.
AUDIO PC (PIC)
Press the assigned programmable key, or set the
toggle switch to activates the Audio Pitch Control-
ler. The Audio Pitch Controller allow you to the most
comfortable and/or effective reception in noisy en-
vironments.
Press the key again, or set the toggle switch to a dif-
ferent position to disable the Audio Pitch Controller.
CLEAR VOICE
Set the toggle switch to the assigned position to acti-
vates the Clear Voice feature. When you are operaiton
in a noisy environment, activates the Clear Voice fea-
ture. Set the toggle switch to a different position to
disable the Clear Voice feature.
ADVANCED OPERATION