Lisheng LS-A8-VHF Two Way Radio User Manual LS A8 UHF

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Document ID	2362634
Application ID	e8+oMQgtQ9N2bRCZKJK2Tg==
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Date Submitted	2014-08-19 00:00:00
Date Available	2014-08-27 00:00:00
Creation Date	2014-08-04 19:30:31
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LS-A8 VHF User Manual
Radio View:
NO.
UNIT
REMARK
Antenna
Transmit/Receive signals, deliver wider communication
coverage.
Speaker
Channel Selector Knob
Turn the knob to select the channels from 1-16.
Power / Volume Knob
Turn clockwise to switch on the radio, and turn
counter-clockwise until a “click” is heard to switch off the
radio. Turn the knob clockwise to increase the volume, and
turn counter-clockwise to decrease the volume.
LED Indicator
Receiving: Green Light bright,
Transmitting: Red Light bright.
MIC
Microphone
PTT (Push-To-Talk) Key
Press and hold PTT key to transmit, and release it to
receive.
SP/MIC cover
Dustproof and Rainproof
Battery Pack
Side Button PF1
10
Side Button PF2
Side Button PF3
You can short press (0.5S) or long press (2.5S) Side Button
to enable the specified functions which can be programmed
via the software. Press this key to activate the function (you
will hear 1 Beep sound) and press again to quit (you can
hear 2 Beep sound).
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Programmable Button
You can program the specified functions for side button via the software, the programmable functions
as follows:
NO.
Items
Remarks
Monitor
Monitor Momentary
Squelch Off
Squelch Off
Battery Capacity
Announcement
To know the current battery capacity.
Scrambler
To make the communication privacy.
Compander
To improve the SNR, that will make communication
clearer.
Adjust TX Power
Adjust the transmitting power of current channel.
VOX On/Off
Activate/exit VOX function.
10
Scan
Scan the activities from other channels.
11
Channel Lock
To lock the current channel position, and the channel
knob is invalid.
12
Emergency Alarm
To transmit Emergency Alarm signals.
Momentary
The radio will un-mute only when it receives a carrier
signal.
The radio will un-mute no matter there is a carrier
signal or not.
Note˖Your dealer may assign different functions for side button (long press or short press the key) in
advanced.
Basic Operation
Power On/Off
Turn the Power Knob (also called Volume Knob) clockwise to switch on the radio, you will
hear a “power on beep” and a voice message will indicate the current channel number. Turn
counter-clockwise to switch off the radio. (See Figure 1)
Adjust the Volume
Press the programmed “Monitor” or “Squelch Off” side button to listen the background noise,
and turn the volume knob to increase or decrease the volume. (See Figure2)
Select a Channel
Turn the Channel Selector Knob to select your desired channel. If the Voice
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announcement function is enable, your radio will automatically report the channel No. where the knob
locates. (See figure 3)
Transmit
Keep pressing the PTT key and speak into the microphone with your normal voice, hold
the radio about 2.5cm to 5cm from your mouth. (See figure 4)
Receive
Release the PTT key to receive.
Programming Functions
The following functions could be programmed via software. Press the programmed side button to
activate the relevant function (long press or short press), you will hear 1 “Beep” when the function is
activated. Press this button again to exit it and you will hear 2 “Beep” which means the function is
closed. If functions are closed, please program firstly before use it.
PTT ID
The PTT ID is used for connecting or disconnecting with the repeaters or telephone systems. We have
3 Encode modes to transmit PTT ID code, as following:
Begin of Tx: It will emit ID code while you press the PTT Key.
End of Tx: It will emit ID code while you release the PTT key.
Both Begin and End: It will emit ID code both while you press and release the PTT key.
Note: This function is available at each channel.
Monitor Function
When signal come in, press the programmed “Monitor” side button to open signaling squelch and
monitor the activities of the channel. No matter QT/DQT or the optional signaling is matched or not, it
can monitor the activities of the current channel. Press this button again to close it.
Note: it only monitor the valid signal but not the background noise.
Monitor Momentary
Keep pressing the programmed “Monitor Momentary” side button to open signaling squelch. No matter
QT/DQT or optional signaling is matched or not, it can monitor the activities of the current channel.
Release this button to close it.
Lisheng (Fujian) Communications Co., Ltd.
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Note: It only monitor the valid signal but not the background noise.
Squelch off
Press the programmed “Squelch Off” side button to open noise squelch. No matter the QT/DQT is
matched or not, it can monitor the activities of the current channel. Press this side button again to
close it.
Note: If there is a valid signal, it monitors the audio signal. If not, it monitors the background noise.
Squelch off Momentary
Keep pressing the programmed “Squelch Off Momentary” side button to open noise squelch. No
matter the QT/DQT is matched or not, it can monitor the activities of the current channel. Release this
side button to close it.
Note: If there is a valid signal, it monitors the audio signal. If not, it monitors the background noise
Squelch Level (SQL)
SQL function can filter the undue background noise to mute the speaker when the radio doesn’t
receive any signals. You can set up the squelch level from 0 to 9. The higher squelch level, the
stronger noise inhibiting ability. It’s not easy to receive the noise signal, but meanwhile you may miss
some weak signals which maybe useful for you. On the contrary, the lower squelch level, it’s easier to
receive the weak signals, but also easier to be affected by noise signals. Level 0 means to disable
SQL function. You can set up the appropriate squelch level via software according to the current
communication environment and requirements.
Channel scan
Press the programmed “Scan” side button to start scanning from the current channel, the radio will
report “Scan On” and start to scan the channel numbers one by one on the list which we programmed
before. Once a valid signal is detected, it will switch to this channel directly. You can press PTT key to
transmit. Press this button again, the radio will report “Scan Off” and exit Scan mode.
Note: The Scan status will not be memorized once the radio is power off.
Auto Scan
You can open "Auto Scan" function in some specified channels via software. When you turn to this
channel, the radio will start to scan the channels one by one according to the scanning list which we
programmed before. Once a valid signal is detected, it will switch to this channel directly. You can
press PTT key to transmit. Rotate the channel knob to other un-set channel, it will stop scanning.
Scan Revert Channel
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You can preset a revert channel when a valid signal is detected, press [PTT] key to stop scan and
switch to the preset revert channel to transmit.
Priority Channel Scan
Sometimes you may need to keep an eye on a prefer channel while you are scanning other channels.
You can set up any channels as the priority channel, which means the radio will scan this priority
channel and other normal channels alternately. Press the programmed “Priority Channel Scan” side
button to activate this function and press this button again to exit. For example, there are 3 channels
CH1, CH2, CH3 and 1 priority channel on the scan list. Then the priority scan will become:
PriĺCH1ĺPriĺCH2ĺPriĺCH3ĺPriĺCH1ĺPri ……
Tx Power Level
Press the programmed side button to adjust TX Power. If your current power is high, when you press
this side button, the power will switch to low power and the radio will report " Low power'. Press again,
the power will switch to high power and the radio will report “High power”.
You can set up the appropriate power level via software according to the current communication
environment and requirements. Tx low power helps you save the battery power and reduce the risk of
interfering with other users, so we suggest you to select low power transmitting when the
communication distance is short and the communication quality is guaranteed.
VOX Function
VOX means voice-operated-transmission, the radio can transmit without pressing PTT key.
ƹVOX On/Off
You can open "VOX" function in some specified channels via software. Press programmed “VOX” Side
button to enable VOX mode, press this button again to disable VOX mode. The radio will report “VOX
On” or “VOX Off”.
Note: 1. VOX function is valid only when you are using a VOX earphone.
2. VOX mode will be memorized after you power off the radio.
ƹVOX Delay Time
After the radio finishing transmitting and turn back to receiving mode, the rest part of your conversation
may not be transmitted completely. So you can set up a VOX Delay time (0.3-3S) to avoid this
situation.
Voice Announcement
When you power on the radio or turn the channel knob, the radio will automatically report the current
channel position. You can choose English/Chinese voice announcement or disable voice
announcement.
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Channel Lock
When the Channel Lock function is activated, channels will not be switched and the voice
announcement function is disabled when you turn the Channel Selector knob, which means the
channel selector knob is invalid. Press the programmed “Channel Lock” side button to activate
channel lock function, you will hear 1 Beep, press this button again to close it and you will hear 2
Beeps.
Note˖This function will not be memorized when power off.
Compander
Voice compander technology can make the communication clearer by improving the ‘Signal to Noise
Ratio’ and decrease the noise when receiving.
Note: Press the programmed side button, radio will remind you "Compander On" or "Compander Off".
And the radio will memorize it when power off.
Scrambler
Scrambler is used for audio encryption, which can further secure the safety of communication, and
those radios without this function are unable to receive real audio.
You can open "Scrambler" function in some specified channels via software. Press the programmed
“Scrambler” side button to enable or disenable it, the radio will remind you "Scrambler on" or
"Scrambler off".
Note: The radio will memorize it when it power off.
QT/DQT
If QT/DQT is set on a channel, the radio will un-mute only when it receives signals with the matched
QT/DQT code. It allows you to ignore some unwanted calls from the same frequency. But other radios
with or without setting QT/DQT can still receive from you. So this function can not make your
conversation confidential.
Note: The QT tones can set from 60.0Hz to 254.1Hz. Non-standard QT tones can also be
programmed in 0.1 Hz step if desired. DQT codes can set from D000N to D777N with 1step.
Narrow Bandwidth
According to your communication requirements you can choose the channel space as
Narrow (12.5KHz) Bandwidth.
Busy Channel Lockout (BCL)
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When BCL function is on, it stops the radio from transmitting on a channel which is in use.
Carrier: Press PTT key to transmit on a channel which is in use, the radio will sound alert tone and
stop transmitting. Please release PTT key to stop the alert tone and turn back to receiving mode.
QT/DQT: If QT/DQT and BCL are set on the current channel, press the PTT key to transmit on a
channel which is in use, once the radio decodes failed, it will sound alert tone and stop transmitting.
Please release PTT key to stop the alert tone and turn back to receiving mode.
OFF: You still can transmit on a channel which is in use.
Time-out Timer (TOT)
TOT function limits the each transmitting time of the radios and it prevents from someone occupying
the channels for too long. Also it protects your radios from thermal damage which caused by long time
transmitting. If the transmitting time exceeds the pre-set TOT time, the radio will stop transmitting and
the red light will turn into green light, at the meantime you will hear a “Du Du Du” alert tone from the
radio. Release the PTT key to cancel the alert tone.
ƹTOT Pre-alert
You can set up TOT Pre-alert time via software. When transmission time is reached, at the TOT
Pre-alert (1-15s), the radio will beep “DU DU DU” sound which means that the radio will be prohibited
to transmit once TOT time limit is reached.
ƹTOT Rekey Time
After the TOT time is reached, the radio will not be able to transmit within the rekey time (Off, 1-60s) of
TOT. This function is used to prevent a channel from being occupied by one user.
ƹTOT Reset Time
When transmitting time is not exceed TOT time, you temporary release PTT key, and press PTT key
again within TOT reset time, these two transmissions will be regarded as one transmitting time, TOT
time will be accumulated. But if the space time between these two transmissions exceeds the TOT
Reset time, the second transmission will resume to accumulating TOT time.
Note: You can program TOT Reset Time (OFF, 1-30S) via software.
Battery Saver
If battery saver function is on, it will be automatically activated once there is no activity on the channel
and no operation to the radio (no key press and no knob select) which last for 10 seconds (You can
program the time via. software: 5s-60s). Pressing any key or receiving a signal will make the radio exit
Battery Saver mode.
Check the Battery Capacity
Press the programmed “Check the Battery Capacity” side button, the radio will report “1,2,3” to
indicate the current battery level, which means “low, not full, full”.
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Low Battery Alert
When the battery capacity is very low, the radio will flash red light and sound “DU DU DU” to alert the
user to recharge the battery. If you press PTT key, the radio will not transmit and always alert “DU DU
DU”. So please release the PTT key and charge the battery.
Note: If the battery voltage is too low, the radio will power off automatically.
Tail Tone Eliminate
This function is used to mute the tail tone after the carrier signal disappears. The receiver may hear
harsh noise when the conversation is over, as the receiver can’t detect it immediately. The signal with
QT/DQT will continue to send a specified signal to remind the receiver to open the squelch and mute
the speaker. This unit can set: 180°, None.
Emergency Alarm
Long Press the programmed “Emergency Alarm” side button PF3 to activate emergency alarm mode,
the radio will emit alarm sound with the loudest voice to remind other users in the same channel.
Power off the radio to exit emergency alarm mode.
Wire Clone
Wire Clone allows you to copy the original setting of one radio to others.
1. Connect the main unit and sub-unit with a Clone cable, then power on the sub-unit.
2. Press and hold PF1 side button of the main unit, and power on the main unit at the same time, you
can see red light of the main unit flash and the radios will enter clone mode. Release PF1 side
button.
3. Press PF1 side button again to start cloning, the red lights of the main unit and sub-unit will flash all
the time during cloning. When red lights go out, the clone is completed. If the radios glow green
light, the clone is failed.
Note:
1. In Wire Clone mode, you can decide to open or close the wire clone ability of the sub-unit. Press
PF3 side button of main unit to enable or disenable this function. If the main unit flash green light
twice, it means the wire clone of the sub-unit is enable; then press PF3 side button again to disable
it, the main unit will flash red light twice.
2. Once the wire clone of the sub-unit is disenable, the sub-unit can’t clone to other radios.
Lisheng (Fujian) Communications Co., Ltd.
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SPECIFICATION
Frequency range
136-174MHz
Channels
Channels spacing
16
12.5kHz
Working Voltage
DC 7.4V
Frequency stability
±2.5PPM
-25 ć to + 55ć
Operating Temperature Range
Antenna impedance
50ȍ
Dimension (L×W×H)
136*58*36mm
Weight (including Antenna and Battery)
246g
TRANSMITTER
Output Power
5W
Modulation Mode
F3E
Modulation Limited
±2.5kHz
İ5%
Audio Distortion
Residual frequency modulation
-45dB /-40dB
Adjacent Channel Power
-70dB /-60dB
Spurious and Harmonic Wave
-36dBm<1GHz -30dBm>1GHz
RECEIVER
Receiving Sensitivity
Adjacent Channels Selectivity
İ0.18uV/0.22uV
ı70dB/60dB
Intermediation
ı60dB
Spurious Response Rejection
ı70dB
SNR
ı50/45dB
Audio Output Power
1.0W
Audio Distortion
İ5%
Note:
The above specifications are in according to the TIA/EIA-603 standard to test. Due to the continous
development of the technology, the above specificationsare subject to change without notice.
Lisheng (Fujian) Communications Co., Ltd.
10 / 11
Precation and Notices
z Government law prohibits the operation of unlicensed radio transmitters. Illegal operation is
punishable by fine or imprisonment Of both.
To avoid problem caused by electromagnetic interference and electromagnetic compatibility,
please turn off the transceiver at the sites where you are required, such as hospital, airplane etc.
In the vehicle equipped with air bag safety, don't put the transceiver within the scope of the air bag
inflation.
Please turn off the transceiver before step into the inflammable and explosive places.
Don't transmit for a long time, it may damage the transceiver or it may cause scald.
Don't use the transceiver which antenna is damaged or else when the exposed metal touch the
skin, it may cause scald also.
Don't expose the transceiver to long periods of direct sunlight, nor place it close to heating
appliances.
If belt the transceiver on with belt clip, please notice that the distance Between body and antenna
should be more than 5cm when transmitting.
If an abnormal odor or smoke is detected coming from the transceiver, switch OFF the power
immediately and remove the optional battery pack from the transceiver. Contact our dealer nearby.
Lisheng (Fujian) Communications Co., Ltd.
SAFETYTRAININGINFORMATION
Your Lisheng (Fujian) Communications Co., Ltd. radio generates. RF electromagnetic
energyduringtransmitmode.Thisradioisdesignedforandclassifiedas“OccupationalUse
Only”,meaningitmustbeusedonlyduringthecourseofemploymentbyindividualsaware
ofthehazards,andthewaystominimizesuchhazards.ThisradioisNOTintendedforuseby
the“GeneralPopulation”inanuncontrolledenvironment. 
ThisradiohasbeentestedandcomplieswiththeFCCRFexposurelimitsfor“OccupationalUseOnly”.Inaddition,
yourLisheng (Fujian) Communications Co., Ltd.radio complies with the following Standards andGuidelines
withregardtoRFenergyandelectromagneticenergylevelsandevaluationofsuchlevelsforexposuretohumans:
FCC OET Bulletin 65 Edition 97-01 Supplement C, Evaluating Compliance with FCC Guidelines for Human Exposure to
Radio Frequency Electromagnetic Fields.
American National Standards Institute (C95.1-1992), IEEE Standard for Safety Levels with Respect to Human Exposure
to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz.
American National Standards Institute (C95.3-1992), IEEE Recommended Practice for the Measurement of Potentially
Hazardous Electromagnetic Fields– RF and Microwave.
Theinformationlistedaboveprovidestheuserwiththeinformationneededtomakehimor
herawareofRFexposure,andwhattodotoasͲsurethatthisradiooperateswiththeFCCRF
exposurelimitsofthisradio.
ElectromagneticInterference/Compatibility
During transmissions, your Lisheng (Fujian) Communications Co., Ltd. radio generates RF energy that can
possiblycauseinterferencewithotherdevicesorsystems.Toavoidsuchinterference,turnofftheradioinareas
wheresignsarepostedtodoso.DONOToperatethetransmitterinareasthataresensitivetoelectromagnetic
radiationsuchashospitals,aircraft,andblastingsites.
Occupational/ControlledUse
The radio transmitter is used in situations in which persons are exposed as consequence of their employment
providedthosepersonsarefullyawareofthepotentialforexposureandcanexercisecontrolovertheirexposure.
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