Hytera TC- 446S User manual

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Thank you for purchasing Hytera TC-446S portable two-way radio.
TC-446S is endowed with professional outlook, reliable structure,
practical functions and mature performance. It will bring you perfect
communication.
To derive optimum performance from your product, please read this
manual and the supplied Safety Information Booklet carefully before use.
Preface

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Instructional Icons
The following icons are available through this manual:
Caution: indicates situations that could cause
damage to your product.
Note: indicates tips that can help you make better
use of your product.
Term Explanation
Please pay your attention to the following key terms:
Key Operation
Short press: to press a key and release it quickly.
Long press: to press and hold down a key for above 1
second.
Hold down: to press a key and remain holding it down.
User Mode
User mode is the operation mode you enter by powering on
the radio.
CTCSS/CDCSS
This technology can avoid unwanted calls at the same
frequency.
Copyright Information
Hytera and HYT are trademarks or registered trademarks of
Hytera Communications Co., Ltd. (“Hytera”) in PRC and/or
other countries or areas. Hytera retains the ownership of its
trademarks and product names. All other trademarks and/or
product names that may be used in this manual are properties
of their respective owners.
The Hytera product described in this manual may include
Hytera computer programs stored in memory or other
media. Laws in PRC and/or other countries or areas protect
the exclusive rights of Hytera with respect to its computer
programs. The purchase of this product shall not be deemed
to grant, either directly or by implication, any rights to the
purchaser regarding Hytera computer programs. Any Hytera
computer programs may not be copied, modied, distributed,
decompiled, or reverse-engineered in any manner without the
prior written consent of Hytera.
Disclaimer
Hytera endeavors to achieve the accuracy and completeness
of this manual, but no warranty of accuracy or reliability is
given. All the specications and designs are subject to change
without notice due to continuous technology development.
No part of this manual may be copied, modied, translated,

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or distributed in any manner without the express written
permission of Hytera.
If you have any suggestions or would like to learn more
details, please visit our website at: http://www.hytera.cn.
RF Energy Exposure Compliance
Your product is designed and tested to comply with a number
of national and international standards and guidelines
(listed below) regarding human exposure to radio frequency
electromagnetic energy. This product complies with the IEEE
and ICNIRP exposure limits for occupational/controlled RF
exposure environment at operating duty factors of up to 50%
transmitting and is authorized by the FCC for occupational
use only. In terms of measuring RF energy for compliance
with the FCC exposure guidelines, your product radiates
measurable RF energy only while it is transmitting (during
talking), not when it is receiving (listening) or in standby mode.
Your product complies with the following of RF energy
exposure standards and guidelines
●United States Federal Communications Commission,
Code of Federal Regulations; 47CFR part 2 sub-part J
●American National Standards Institute (ANSI)/Institute of
Electrical and Electronic Engineers (IEEE) C95. 1-1992
●Institute of Electrical and Electronic Engineers (IEEE)
C95. 1-1999 Edition
●International Commission on Non-Ionizing Radiation
Protection (ICNIRP) 1998
Operational Instructions and Training Guidelines
To ensure optimal performance and compliance with the
occupational/controlled environment RF energy exposure
limits in the above standards and guidelines, users should
transmit no more than 50% of the time and always adhere to
the following procedures:
Transmit and Receive
To transmit (talk), push the Push-To-Talk (PTT) key; to
receive, release the PTT key.
FCC Licensing Information
Part 15 Compliance
This product has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This product generates, uses and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is
no guarantee that interference will not occur in a particular
installation. If this product does cause harmful interference

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to radio or television reception, which can be determined by
turning the product off and on, the user is encouraged to try
to correct the interference by one or more of the following
measures:
●Reorient or relocate the receiving antenna.
●Increase the separation between the product and
receiver.
●Connect the product into an outlet on a circuit different
from that to which the receiver is connected.
●Consult the dealer or an experienced radio/TV technician
for help.
FCC Licensing Requirements
A license from Federal Communications Commission is
required prior to use. Your dealer will program each product
with your authorized frequencies, signaling codes, etc., and
will be there to meet your communications needs as your
system expands. Contact your dealer for more information.
EU Regulatory Conformance
The product is in compliance with the essential requirements
and other relevant provisions of the Directive 1999/5/EC.
Note: The above information is applicable to EU
countries only.

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Contents
Checking Items in the Package --------------------------- 2
Product Overview ---------------------------------------------- 3
Product Controls--------------------------------------------- 3
Programmable Keys ---------------------------------------- 4
Before Use -------------------------------------------------------- 5
Charging the Battery --------------------------------------- 5
Assembling the Accessories ----------------------------- 6
Status Indication------------------------------------------------ 7
Basic Operations ----------------------------------------------- 8
Turning the Radio On/Off --------------------------------- 8
Adjusting the Volume--------------------------------------- 8
Selecting a Channel ---------------------------------------- 8
Transmitting/Receiving ------------------------------------ 8
Functions and Operations ---------------------------------- 9
CTCSS/CDCSS---------------------------------------------- 9
Time-out Timer (TOT)-------------------------------------- 9
Monitor --------------------------------------------------------- 9
Squelch Off --------------------------------------------------- 9
Scan------------------------------------------------------------- 10
VOX ------------------------------------------------------------- 11
Battery Strength Indicator--------------------------------- 12
Low Battery Alert -------------------------------------------- 12
Channel Lock------------------------------------------------- 12
Battery Save -------------------------------------------------- 13
Busy Channel Lockout ------------------------------------- 13
Troubleshooting ------------------------------------------------ 14
Care and Cleaning---------------------------------------------- 16
Optional Accessories ----------------------------------------- 17

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Checking Items in the Package
Please unpack carefully and check that all items listed below are received. If any item is missing or damaged, please contact your
dealer.
Note: The pictures are for reference only.
Rapid-rate Charger
Battery
Radio Unit
Strap
Belt Clip
Power Adapter
Owner’s Manual & Safety
Information Booklet

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Product Overview
Product Controls
No. Part Name No. Part Name
1 PTT Key 10 Battery Latch
2 SK1 (programmable) 11 Accessory Jack
Cover
3 SK2 (programmable) 12 Accessory Jack
4 Antenna 13 Strap Hole
5Channel Selector
Knob 14 Belt Clip
6Radio On-Off/Volume
Control Knob 15 Battery
7 Speaker 16 Screw of Belt Clip
8 Microphone 17 Charging Piece
9 LED Indicator

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Product Overview
Programmable Keys
For enhanced convenience, you may request your dealer to
program the keys SK1 and SK2 as shortcut to the functions
listed below:
No. Shortcut Key Function
1 Monitor To adjust the condition for
incoming signal match.
2Monitor Momen-
tary
3 Squelch Off To always unmute speaker
no matter whether carrier is
present or not.
4Squelch Off Mo-
mentary
5 Scan To listen to communication
activities on other channels.
6 VOX To make the radio transmit
automatically when you speak.
7Battery Strength
Indicator
To indicate the charge remai-
ning in the battery.
8 Channel Lock To lock the current channel.
Note: Long and short press of the key can be
assigned with different functions by your dealer.

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Before Use
Charging the Battery
Use only the charger and battery specied by Hytera. Charger
LED can indicate the charging process.
■Charge Diagram
■Procedures
1. Connect the power adapter to AC source. See arrow 1;
2. Plug the power adapter into the rear socket of the
charger. See arrow 2; (At this time, the LED glows green
to indicate the charger is ready for use.)
3. Place the radio with the battery attached, or the battery
alone, into the charger; See arrow 3;
4. The charging process initiates when LED glows red, and
is completed when LED glows green.
■Charge Indicator
LED Indicator Charge Status
LED solidly glows red. Charging
LED solidly glows orange. About fully charged
LED solidly glows green. Fully charged
Ready for use
When battery power runs low, the LED will ash red, and the
low-pitched tone will sound periodically. In this case, please
replace or charge the battery.
Note:To achieve optimal battery performance,
please charge the battery for 5 hours before initial
use.
Caution: Be sure to read the Safety Information
Booklet, to get necessary safety information.

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Before Use
Assembling the Accessories
Attaching the Battery
1. Push the battery into the radio’s slot;
2. Slightly press the bottom of the battery until a click is
heard.
To remove the battery, turn off the radio rst. Then slide the
battery latch upward to release the battery.
Attaching the Belt Clip
1. Remove the screws;
2. Align the screw holes on the belt clip with those on the
radio’s body, and then tighten the screws.
To remove the belt clip, loosen the screws.
Attaching the Audio Accessory/Programming
Cable
1. Uncover the accessory jack;
2. Plug an audio accessory/programming cable into the
accessory jack (if it is an audio accessory, remember to
tighten the screw).

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Before Use
To remove the accessories, pull out the plug (if it is an audio
accessory, remember to loosen the screw rst).
The top LED indicator will help you easily identify current radio
status.
LED Indicator Radio Status
Red LED glows. Transmitting
Red LED ashes. Low battery alert
Green LED glows. Receiving
Green LED ashes. Scanning
Caution: When you are using an external
accessory, waterproof performance of the radio
may get affected.
Status Indication

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Basic Operations
Turning the Radio On/Off
Rotate the Radio On-Off/Volume Control knob clockwise/
counter-clockwise until a click is heard to turn the radio on/off.
Adjusting the Volume
You may control the volume level using the Radio On-
Off/Volume Control knob. After the radio is powered on,
rotate the knob clockwise to increase the volume, or counter-
clockwise to decrease the volume.
Selecting a Channel
The radio supports up to 16 channels. Rotate the Channel
Selector knob to align your desired channel number with the
white channel mark.
Transmitting/Receiving
To transmit audio signals, press and hold down the PTT,
and speak into the microphone. During transmitting, the LED
solidly glows red.
To receive, just release the PTT. When any audio signal is
received, the LED solidly glows green.
Note:When the radio is currently staying on a blank
channel, it would sound beep tones continuously.
Note:
●To ensure optimal volume of the receiving
radio, hold the radio approximately 2.5 to 5
centimeters away from your mouth.
●Communication range may get affected in rainy
days or forest locations.

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Functions and Operations
CTCSS/CDCSS
You may set up talkgroups with unique CDCSS/CTCSS to
prevent unwanted conversations at the same frequency.
If CTCSS/CDCSS is set on a certain channel, you can
only receive voice calls from radios with matching CTCSS/
CDCSS. Otherwise you will receive voice calls from all users
operating at the same frequency.
You may request your dealer to program corresponding
parameters on certain channels. For detailed operation
method, please consult your dealer.
Time-out Timer (TOT)
The purpose of TOT is to prevent any user from occupying
a channel for an extended period. If the preset time expires,
the radio will automatically terminate transmission and keep
beeping. To stop beeping, please release the PTT key. You
must wait for a certain time period (preset by your dealer)
before you can press and hold down the PTT key to transmit
again.
If the pre-alert function is set by your dealer, your radio will
alert you to the TOT expiration in advance.
Monitor
This feature allows you to lower the conditions for incoming
signal match.
Operation:
■Press the programmed Monitor key to activate this
function (an alert tone sounds); press it again to
deactivate the function (the alert tone sounds twice). Or
■Press and hold the programmed Monitor Momentary
key to activate this function (an alert tone sounds);
release the key to exit (the alert tone sounds twice).
Squelch Off
This feature allows you to unmute the speaker on current
channel, no matter whether a carrier is present.
Note:The radio supports 38 groups of standard
CTCSS, 83 groups of standard CDCSS, and 180
degree CTCSS tail reverse.

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Functions and Operations
Operation:
■Press the programmed Squelch Off key to activate this
function; press the key again to deactivate it. Or
■Press and hold the programmed Squelch Off
Momentary key to activate this function; release the key
to deactivate it.
Scan
This feature allows you to listen to communication activities
on other channels so that you can keep a close track of your
team members. The scan list can be set by your dealer.
Operation:
1. To activate this function, you may
■Press the programmed Scan key; or
■Switch to a channel enabled with the auto scan feature
(programmed by your dealer).
2. After the feature is enabled, your radio will scan
according to the scan list set for the channel on which
scanning starts. The scanning process is as follows:
■During scanning, the LED ashes green;
■When communication activities are detected on a
channel, the radio will stay to receive activities present
on this channel. At this time, the LED glows green;
■If the talk back feature is enabled by your dealer, press
and hold down the PTT to reply when the radio stays
on a certain channel.
■You can scan the frequently used channel if the priority
scan feature is enabled. When scan stays on a non-
priority channel, the radio will keep detecting activities
on the priority channel. Once any activity is detected, it
will jump to the priority channel. For more information,
please consult your dealer.
Note:When this function is enabled on current
channel, you will hear audio signals (if any);
otherwise, background noise will be heard.
Note: The radio will not start scan if there are less
than two channels in the scan list.

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Functions and Operations
3. To exit the scanning process, you may
■Press the Scan key again; or
■Switch to a channel where the auto scan feature is not
enabled;
■Turn the radio off.
VOX
This feature allows you to transmit the voice with no need to
press PTT. However, you must employ a dedicated earpiece
to realize this function.
Operation:
1. Set the PTT/VOX Switch on the earpiece to VOX;
2. Plug the earpiece into the accessory jack;
3. Press the programmed VOX key to activate this function;
4. Speak into the microphone (on the earpiece) to transmit
your voice, and transmission will stop automatically when
you stop talking;
5. Power the radio off or press the VOX key again to
deactivate this function.
Note:
●You can enable or disable the following alert
tones: scan start alert and scan exit alert.
●During scanning, the following function keys, if
programmed, are available: PTT, .Squelch Off,
Squelch Off Momentary, Monitor and Monitor
Momentary.
Note:
●If the PTT/VOX Switch on the earpiece is
set to PTT, you can only transmit by pressing
the external PTT, no matter whether VOX is
activated.
●When the earpiece is plugged into the
accessory jack, do not switch the PTT/VOX
Switch from PTT to VOX directly if it is set
to PTT; otherwise, continuous transmission
may occur. If continuous transmission occurs
unexpectedly, you can restore the radio to
normal operation by toggling the switch from
VOX to PTT, or turning the radio off and back
on.

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Functions and Operations
Battery Strength Indicator
With this feature, you can learn the remaining battery strength
easily.
Operation:
Press and hold down the programmed Battery Strength
Indicator key, and the LED glows to indicate remaining
battery strength by different colors (see table below). Release
the key to exit. The table lists different colors representing
different battery strength levels.
LED Indicator Battery Strength
LED glows green. High
LED glows orange. Medium
LED glows red. Low
Low Battery Alert
This feature allows you to know the low battery status.
When battery power runs low, the LED will ash red, and the
low-pitched tone (programmed by your dealer) will sound
periodically. In this case, please replace or charge the battery.
Channel Lock
This feature can avoid unexpected channel change due to
rotation of Channel Selector knob by accident.
Operation:
Press the programmed Channel Lock to activate this function
(an alert tone sounds); press the key again to deactivate it
(the alert tone sounds twice). After this function is activated,
the radio will stay on current channel; at this time, you can not
change the channel even using the Channel Selector knob.
●You can select an appropriate VOX sensitivity
according to the operating environment. If VOX
is activated under heavy noise, continuously
transmission may occur.
Note: When the battery strength is insufcient, the
programmed Battery Strength Indicator key will
become unavailable. However, when the battery
strength is drained, transmission will be prohibited;
if you press PTT in such situations, the radio will
sound an alert to warn you.

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Functions and Operations
Battery Save
In Standby mode, if the radio is inactive (no key press/
transmission/reception) for 10 seconds (programmable), it
will automatically enter Battery Save mode to reduce battery
consumption. The radio may exit the Battery Save mode
and get activated once any key is pressed or any signal is
received.
Busy Channel Lockout
If enabled via the programming software, this feature can
prevent your radio interfering with other transmitting radios
on the same channel. If you hold down the PTT key while the
channel is in use, your radio will keep beeping and return to
Receive mode. To stop beeping, please release the PTT key.
Note: This function will be deactivated if the radio is
powered off and back on, or it is programmed.

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Troubleshooting
Phenomena Analysis Solution
The radio can not be powered
on.
The battery may be improperly in-
stalled. Remove the battery and attach it again.
The battery may run out. Recharge or replace the battery.
The battery may suffer from poor
contact caused by dirtied or damaged
battery contacts.
Clean the battery contacts. If the problem can not
be solved, contact your dealer or authorized service
center for inspection and repair.
During receiving signals, the
voice is weak, discontinuous or
totally inactive.
The battery strength may be too low. Recharge or replace the battery.
The volume may be set to a low level. Increase the volume by rotating the Radio On-Off/Vo-
lume Control knob clockwise.
The speaker may be blocked or da-
maged.
Clean surface of the speaker. If the problem can not
be solved, contact your dealer or authorized service
center for inspection and repair.
You can not communicate with
other members.
The frequency or signaling may be in-
consistent with that of other members.
Set your TX/RX frequency and signaling the same as
that of other members.
The radio may be locked on other
channels.
Deactivate the Channel Lock function and switch to
your desired channel.
You may be too far away from the
group members.
Move towards other members. And make sure that
you are within the communication range.

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Troubleshooting
Irrelevant communications or
noises are heard on the chan-
nel.
You may be interrupted by radios
using the same frequency. Change the frequency, or adjust the squelch level.
The radio may not be set with any
signaling.
Set signaling for all member radios to avoid interfe-
rence at the same frequency.
The noise is too loud.
You may be too far away from other
members.
Move towards other members, power off your radio
and then restart it.
You may be at an unfavorable positi-
on. For example, your communication
may be blocked by high buildings or
frustrated in the underground areas.
Move to an open and at area, and restart the radio.
You may suffer from external distur-
bance (such as electromagnetic
interference).
Stay away from equipment that may cause interfe-
rence.
If the above solutions can not x your problems, or you may have some other troubles, please contact us or your local dealer for more
technical support.

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Care and Cleaning
To guarantee optimal performance as well as a long service
life of your product, please follow the tips below.
Product Care
■Do not pierce or scrape the product with any edged
instruments or hard objects.
■Keep the product far away from substances that can
corrode the electronic circuit.
■Do not hold the product by its antenna or headset cable
directly.
■Attach the accessory jack cover when the product is not
in use.
Product Cleaning
■Clean up the dust and fine particles on the product
surface and charging piece with a clean and dry lint-free
cloth or a brush regularly.
■Use neutral cleanser and a non-woven cloth to clean the
keys, control knobs and front case after long-time use. Do
not use chemical preparations such as stain removers,
alcohol, sprays or oil preparations, so as to avoid surface
case damage. Make sure the product is completely dry
before use.
Caution: Power off and remove the battery before
cleaning.