BK Radio DMH APCO Project 25, DMH User Manual
38 BK Radio
NOTES:
DMH Owner’s Manual 3
TABLE OF CONTENTS
Features..................................................................... Inside Front Cover
FCC Requirements .................................................................................4
Safety Precautions..................................................................................4
RF Energy Exposure Awareness And Control Information ....................5
Radio Controls ........................................................................................8
Basic Operation ......................................................................................8
Channel Guard Operation.......................................................................9
Mixed Mode Operation .........................................................................12
Secure Operation..................................................................................13
Channel Groups....................................................................................15
Programmable Push Buttons/ Microphone FCN Key Menu .................15
Scan Operation.....................................................................................20
Priority Scan .........................................................................................22
Unit-To-Unit Call ...................................................................................26
Emergency Call ....................................................................................30
User Selected Channel Guard..............................................................31
Other Operational Features ..................................................................32
Alphanumeric Display
...........................................................................35
Definitions And Acronyms
.....................................................................37
Service ........................................................................ Inside Back Cover
4 BK Radio
INTRODUCTION
This section contains information concerning the operational
procedures for BK Radio DMH APCO Project 25 digital mobile radios.
To meet backwards compatibility as defined by the APCO Project 25
standard, the DMH digital mobile radio provides users the ability to
interoperate with narrow or wide band analog channels as well as
digital systems. Please take a moment to read the information in this
manual so you can get optimum performance from your new radio.
FCC REQUIREMENTS
Your radio must be properly licensed by the Federal Communications
Commission prior to use. Your BK Radio dealer can assist you in
meeting these requirements. Your dealer will program each radio with
your authorized frequencies, signaling codes, etc., and will be there to
meet your communications needs as your system expands.
SAFETY PRECAUTIONS
• Do not operate the transmitter in close proximity
to blasting caps.
• Do not operate the radio in an explosive
atmosphere (petroleum fuels, solvents, dust,
etc.).
•
Do not operate the transmitter if a person
outside the vehicle is less than three feet from
the antenna or touching the antenna.
DMH Owner’s Manual 37
DEFINITIONS AND ACRONYMS
ANI Automatic Numeric Identification
CG Channel Guard
CLR Clear
Channel Guard A subaudible tone, a code (analog) or a Network Access Code
(digital) for selective calling and receiving.
DTMF Dual Tone Multiple Frequency
DTMF Tones Tones that sound like those used by a standard push-button
telephone.
ENT Enter
FCN Function
GRP Group
ID
Digital reception/transmission – ‘It’s Digital.”
Individual
Personality
The information programmed with a PC on both a global and bychannel basis that tells the radio exactly how to operate.
Mixed Mode Allows Analog and Digital operation on the same channel
NAC Network Access Code for digital channel.
PR Priority Channel
PRG Programming mode
PRI Priority
PTT Push-To-Talk
RTA Repeater Talk Around
RTX Channel Ready-to-Transmit Channel
RX Receive
SCN Scan
SQL Squelch
Squelch A control that eliminates background noise.
Talkback Scan When scanning, if a signal is present, the scan will stop and you
will hear the signal. If you then push the PTT switch to talk back
to the person, you are in Talkback Scan Mode.
TGID Talk Group ID
Time-Out Timer A feature that limits the duration of calls.
TX Transmit
36 BK Radio
CHANNEL LABELS
You can program the radio with a label for each of the
25 channel groups and a label for each of the 16
channels within each group.
To display the channel number associated with a
channel label:
1. Press the microphone’s [#] key to display the
group number.
2. Press the [#] key again to display the channel
number.
3. Press and hold the [#] key to display the channel
label.
4. Press the [ENT] key or wait for about 5 seconds to
revert to normal radio operation.
Each label can include up to eight characters, with
decimal points available between characters.
Characters can include A-Z, 0-9, -, *, $, /, +, %, \, |, _,
<, >, h, or a blank space.
GROUP LABELS
The display can show group labels in addition to group
numbers.
To display a group label, turn scanning functions off,
then:
1. Press the microphone’s [#] key to display the
group number.
2. Press and hold the [#] key to display the group
label.
3. Press the [ENT] key or wait for about 5 seconds to
revert to normal radio operation.
DMH Owner’s Manual 5
RF ENERGY EXPOSURE AWARENESS AND
CONTROL INFORMATION, AND OPERATIONAL
INSTRUCTIONS FOR FCC OCCUPATIONAL USE
REQUIREMENTS
BEFORE USING YOUR MOBILE 2-WAY RADIO, READ THE
INFORMATION BELOW WHICH CONTAINS IMPORTANT
OPERATING INSTRUCTIONS FOR SAFE USAGE AND RF ENERGY
AWARENESS AND CONTROL INFORMATION FOR COMPLIANCE
WITH RF ENERGY EXPOSURE LIMITS IN APPLICABLE NATIONAL
AND INTERNATIONAL STANDARDS.
NOTICE: This radio is intended for use in
occupational/controlled conditions, where users have full
knowledge of their exposure and can exercise control over
their exposure to meet FCC limits. This radio device is NOT
authorized for general population, consumer, or any other use.
This 2-way radio uses electromagnetic energy in the radio frequency
(RF) spectrum to provide communications between two or more users
over a distance. It uses radio frequency (RF) energy or radio waves to
send and receive calls. RF energy is one form of electromagnetic
energy; other forms include, but are not limited to, sunlight and x-rays.
RF energy, however, should not be confused with these other forms of
electromagnetic energy, which when used improperly, can cause
biological damage. Very high levels of x-rays, for example, can
damage tissues and genetic material.
Experts in science, engineering, medicine, health and industry work
with organizations to develop standards for exposure to RF energy.
These standards provide recommended levels of RF exposure for both
workers and the general public. These recommended RF exposure
levels include substantial margins of protection. All 2-way radios are
designed, manufactured, and tested to ensure they meet government
established RF exposure levels. In addition, manufacturers also
recommend specific operating instructions to users of 2-way radios.
These instructions are important because they inform users about RF
energy exposure and provide simple procedures on how to control it.
Please refer to the following WEBSITES for more information on what
RF energy exposure is and how to control your exposure to assure
compliance with established RF exposure limits.
http://www.fcc.gov/oet/rfsafety/rf-faqs.html
http://www.osha.gov/SLTC/radiofrequencyradiation/index.html
6 BK Radio
FEDERAL COMMUNICATIONS COMMISSION
REGULATIONS
The FCC rules require manufacturers to comply with the FCC RF
energy exposure limits for mobile 2-way radios before they can be
marketed in the U.S. When 2-way radios are used as a consequence
of employment, the FCC requires users to be fully aware of and able to
control their exposure to meet occupational requirements. Exposure
awareness can be facilitated by the use of a product label directing
users to specific user awareness information. Your BK Radio 2-way
radio has an RF exposure product label. Also, your BK Radio owner’s
and service manuals include information and operating instructions
required to control your RF exposure and to satisfy compliance
requirements.
COMPLIANCE WITH RF EXPOSURE STANDARDS
Your BK Radio 2-way radio is designed and tested to comply with a
number of national and international standards and guidelines (listed
below) for human exposure to radio frequency electromagnetic energy.
This radio complies with the IEEE and ICNIRP exposure limits for
occupational/controlled RF exposure environment at operating duty
factors of up to 50% talk-50% listen and is authorized by the FCC for
occupational use only. In terms of measuring RF energy for
compliance with the FCC exposure guidelines, your radio antenna
radiates measurable RF energy only while it is transmitting (during
talking), not when it is receiving (listening) or in Standby Mode.
Your BK Radio 2-way radio complies with the following RF energy
exposure standards and guidelines:
•
United States Federal Communications Commission, Code of
Federal Regulations; 47 CFR §§ 1.1307, 1.1310, 2.1091 and
2.1093
•
American National Standards Institute (ANSI) / Institute of
Electrical and Electronic Engineers (IEEE) C95. 1-1992
•
Institute of Electrical and Electronic Engineers (IEEE) C95.11999 Edition
INDUSTRY CANADA COMPLIANCE
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numerique de la classe B est conforme à la norme NMB-
003 Canada.
DMH Owner’s Manual 35
BUSY CHANNEL LOCKOUT WITH OVERRIDE
This mode operates in the same manner as Busy
Channel Lockout except that the user can override and
transmit by pressing the CG button to disable receive
Channel Guard (an arrow will appear over the button).
The transmitter is locked out only if the CG button is off
(no arrow above the CG button).
ALPHANUMERIC DISPLAY
The Alphanumeric Display can be programmed to
operate in Numeric Mode, displaying channel numbers
instead of labels.
Display annunciators indicate the following information:
ALPHANUMERIC INDICATION
PR -Priority Channel
PRG -Programming Mode
TX -Transmit
RX -Receive
SCN -Scan List Channel
-Flashing SCN indicates
scanning in progress, and RX
SCN indicates receiving on a
scanned channel.
ID -Digital reception/transmission -
‘It’s Digital’
-Programming Mode - Automatic
Numeric Identification (ANI)
CG -User Channel Guard Active
GRP -Group Label
-Individual Call
-Flashing phone icon indicates
missed call.
DMH Series mobile radios can be programmed with
the following features:
34 BK Radio
BUSY CHANNEL INDICATION
The yellow Busy Channel Indicator glows if there is
carrier activity on the selected channel. If the selected
channel is a Channel Guard channel and the proper
Channel Guard value is not detected, the Busy
Channel Indicator remains on for the duration of the
carrier activity and no message is heard. During Scan
and Priority Scan operation, the Busy Channel
Indicator glows when activity is detected on any
channel on the Scan List.
When scanning or priority scanning Channel Guard
channels with the CG (Channel Guard Disable) button
OFF and activity has been detected, the Busy Channel
Indicator glows for the time period necessary to
determine if the proper Channel Guard value has been
received. This will cause the Busy Channel Indicator to
flash at various rates.
BUSY CHANNEL LOCKOUT
The Busy Channel Lockout feature applies only to
those channels programmed with a receive Channel
Guard value. When carrier activity is detected on the
channel selected, the radio checks the receive
Channel Guard value. If the proper Channel Guard
value is present, the radio can transmit on that channel
even if the CG button is off.
If the radio detects an incorrect value or carrier activity
only, the transmitter is disabled. If an attempt is made
to transmit, an alert tone will be generated and the
display will show the word BUSY until the channel
becomes available or the PTT switch is released,
whether the CG button is on or off.
Channels not programmed with a receive Channel
Guard value can be used to transmit regardless of
carrier activity.
DMH Owner’s Manual 7
RF EXPOSURE COMPLIANCE AND CONTROL GUIDELINES
AND OPERATING INSTRUCTIONS
To control exposure to yourself and others and to ensure compliance
with the RF exposure limits, always adhere to the following procedures.
Guidelines:
• User awareness instructions must accompany device when
transferred to other users.
• Do not use this device if the operational requirements
described herein are not met.
Operating Instructions:
• Transmit no more than the rated duty factor of 50% of
the time. To transmit (talk), push the Push-To-Talk (PTT)
button. The red LED will illuminate when the radio is
transmitting. To receive calls, release the PTT button. The
red LED will extinguish when the radio stops transmitting.
Transmitting 50% of the time, or less, is important because
this radio generates measurable RF energy exposure only
when transmitting (in terms of measuring for standards
compliance).
• Transmit only when persons around the vehicle are at
least 3 feet (90 centimeters) away from the vehicle with a
properly installed antenna. This separation distance will
ensure that there is sufficient distance from a properly
installed (according to installation instructions) externallymounted antenna to satisfy the RF exposure requirements in
the standards listed above.
CONTACT INFORMATION
For additional information on exposure requirements or other
information, visit website http://www.relm.com.
8 BK Radio
BK RADIO
SCN PRI GRP SQLMON
VOL
OFF -
CH
GMH
Transmit Indi cator
Priori ty Indicator
Busy Channel Li ght
Functi on Button
On/Off Indicators
Display Dimming Sensor
Functi on Button s
Channel Selector
Knob
On/Off
Volume Knob
Micr ophone
Connector
RADIO CONTROLS
BASIC OPERATION
RECEIVE
1. Turn power on by pushing and releasing the
Volume knob. The radio will beep, indicating that
it has passed its self test and is operational.
2. Set volume by pressing the [MON] button to hear
squelch noise. Turn the Volume knob to set a
comfortable volume level. Press the [MON] button
again to stop squelch noise.
3. Select a channel group (if applicable) by pressing
the [GRP] button and turning the Channel Selector
knob. Press the [GRP] button again to return to
Channel Select mode.
4. Select a channel by turning the Channel Selector
knob. When the unstopped channel selector is
rotated past the highest (16
th
) channel, the radio
will emit a beep and remain on the highest
channel. When rotated past the lowest (1
st
)
channel, the radio will emit a beep and remain on
the lowest channel.
DMH
DMH Owner’s Manual 33
DTMF ENCODING (Analog Mode Only)
Radios with keypad-equipped microphones can be
programmed to enable DTMF (Dual Tone Multiple
Frequency) encoding. To send DTMF tones (similar to
the tones used by a standard push-button telephone):
1. Press and hold the PTT switch.
2. Press any of the keys on the microphone’s
keypad.
You will hear a sidetone.
The FCN, PRI, ENT, and CLR keys respond as DTMF
tones A, B, C, and D, respectively.
ANI ENCODING (Analog Mode Only)
ANI encoding (Automatic Number Identification), if
enabled, transmits a sequence of DTMF tones each
time you press the PTT switch. You will hear a
sidetone. Your dealer can program the ANI number to
be sent.
If DTMF and ANI are both enabled, the ANI tone
sequence is transmitted only after the microphone’s
[ENT] key is pressed while the PTT switch is activated.
You will hear a sidetone.
TIME-OUT TIMER
The transmit Time-Out Timer limits the duration of calls
and guards against accidentally locking on the
transmitter and tying up the radio system. Your dealer
can program the duration of the Time-Out Timer (15225 seconds, or disabled).
BUSY CHANNEL
If the radio has been programmed for Busy Channel
operation, it will operate in one of the following three
Modes:
• Busy Channel Indication
• Busy Channel Lockout
• Busy Channel Lockout with Override
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