BOOK 11 COMMUNICATIONS MANUAL Flashcards
Radio communications for the fire service has evolved considerably over the last
60 years
The _____ _____ ______ issues guidelines and restrictions on the use of radio transmissions.
Federal communications commision
all 18, 800 MHz radio channels MDT messages and phone calls into, and from Metro Fire Communications (MFC or “Metro”) are recorded on a _______ ___ ___
24 hour basis
all radios are assigned a ____digit identification number that is transmitted and recorded each time a radio is keyed.
Four digit
Emergency Operations
Metro Fire Communications Channels (_, _, _, and _) shall be used by field units for communications as outlined in the Manual of Operation Section 2/1-00.00.
4,7,8, and 9
A sound approach for members to follow for tactical communications would be communications indicating at least the following: The _____ _____ and_____
Conditions actions and needs
If an emergency exists, an accurate ______-_____covering all pertinent information is required.
Size up
size-up shall include, but is not restricted to the following information, as applicable:
\_\_\_\_\_\_ of location of incident \_\_\_\_\_\_ of incident \_\_\_\_\_ hazard \_\_\_\_\_\_\_needed \_\_\_\_\_\_\_ problems Location of \_\_\_\_\_ \_\_\_\_\_\_
Address Type Life hazard Assistance needed Exposure problems Location of command post
When requesting assistance from outside agencies, allow approximately ___ _____ before requesting ETA’s.
30 minutes
Companies returning to their own quarters shall not direct MFC to
“release the move up companies.”
At no time shall any member specifically cancel a resource of _____ _____,
Higher authority
A ____ ____-____should emphasize those aspects of an incident which are interest to the news media.
A press size-up
The press size-up should be made on a channel which is not being used at the time.
It should include the fact that it is a “____ __Incident,” if appropriate.
Code 20
The purpose of ______ Channels is to reduce the overall radio traffic on any one channel.
Tactical
MFC does not normally monitor
Tactical channels
has been designated as the Department’s Command Channel.
Channel 11
means that a radio message is received and understood,
Roger
means discontinue response, or you don’t need the specific resource.
Cancelled
_________or_______ means a particular resource is monitoring the radio.
On the air or on the radio
means a stronger signal has interfered with and overpowered another signal, making the weaker signal unreadable.
Covered
a widely used code which indicates that an occurrence has potential value to the news media.
Code 20
abbreviation for Arson Unit.
A unit
“Available” means ready for response within ___seconds. You are either available or you are not.
60 seconds
used at incidents involving bomb threats.
Bravo tango
estimated time of arrival.
Eta
_____Over land, an aircraft has, or is suspected to have an operational issue that affects normal flight operations to the extent there is danger of an accident..
Alert 2
_________ Over water, an aircraft has, or is suspected to have an operational issue that affects normal flight operations to the extent there is danger of an accident.
Blue 2
______ An aircraft accident has occurred on, or in the vicinity of the airport.
Alert 3
______ An aircraft accident has occurred in the water.
Blue 3
LAPD dispatch is called
Control
Los Angeles County Fire dispatch is called
LA
Ventura County Fire dispatch is called
Ventura
U.S. Forest Service, Angeles National Forest dispatch is called
Angeles
Dispatch Center communications for any of the 11 agencies managed by Verdugo Communications Center would be addressed to
Verdugo
When speaking into a microphone use a ___, ___, and _____- voice
Loud clear and controlled
Members are reminded when making radio transmission, there are four considerations:
- Think about what you are going to say.
- Ask yourself if the message is _______.
- Keep it ______.
- When you key the mike, be prepared to speak.
Necessary
Brief
Hold the “press to talk” button down ________ BEFORE transmitting.
Momentarily
Keep the microphone CLOSE to your mouth – about _______
One inch
The LAFD has two different wireless communications systems. The first is the “_____” radio system and the second is the “____” radio system.
Voice
Data
The voice radio system is an “_____ ______ _______” system.
Analog conventional simulcast
The data system carries our __________ communications
Mobile data terminal (mdt)
The LAFD voice system operates in the ____ MHz range, and the data system operates in the ____ MHz range.
800
500
the Department has additional “simplex” or “direct” digital channels in the _____ MHz band
700
There are three 700 MHz digital channels licensed to the LFD located at the end of Zones __, _ and _, accessed via the front panel key pad identified as channels 7TAC19D, 7TAC20D and 7TAC21D.
7, 8, and 9
There are additional 700 MHz National Emergency Response Interoperability channels in Zone 7, beginning with _______ available as required
7TAC51D
There are 10 strategically located remote transmit/receive sites serving the LAFD voice radio system. They are
- Oat mountain
- Beverly glen
- Verdugo peak
- mt Washington
- KSKQ
- 100 Wiltshire
- Baldwin hills
- Sand Pedro hill
- City hall east
- Mt likens (city wide voice backup system)
MFC, METRO or the backup signal office located at Fire Station ___ (Coldwater) can send signals to the transmitter either by wire, microwave or by a combination of both.
108
The Mt. Lukens system is truly independent of the
Simulcast system
Even though Mt. Lukens is not transmitting with the simulcast system; it is listening in “____ _____’’mode at all times.
Base station
When Mt. Lukens receives a voice radio message on the “__’’ leg, frequency; it repeats it on the “___” leg frequency.
Up leg
Down leg
Oat Mountain Verdugo Peak Mt. Lee Elysian Park 100 Wilshire San Pedro Hill
Provide coverage for?
Data radio network (MDT)
LAFD radio transmitters amplify signals to a maximum of
155 WATTS
____ _____ and______ limit the effectiveness of radio wave behavior. They effectively are physical barriers.
Mountains, valleys, and distances
Mobile Radios (Figure 6) installed in department vehicles have 800 MHz mobile units that transmit at
35 watts
LAFD portable radios transmit __ or __ Watts of power (depending on model) and have a transmit range of up to about __-__ miles in “simplex” or direct mode under the best of conditions.
2 or 4
2 to 3 miles
LAFD Portable radios are provided to the field in 3 different bands.
700/800 MHZ, VHF, UHF
The frequency of the wave is its rate of
OSCILLATION
One oscillation cycle per second is called One ____
Hertz
In general, the higher the frequency of the waves used by the radio, the _____ the antenna on the radio.
Shorter
Ultra high frequency (uhf) uses how many MHz
500
UHF-Used for mutual aid incidents with surrounding ___ and ____ agencies. Also used for Hospital Base Station contact.
FIRE AND POLICE
VERY HIGH FREQUENCY (VHF) USES HOW MANY MHz
100 MHz
VHF-Used by surrounding fire agencies for _____ and routine operations.
TACTICAL
repeaters used when operating the ___ and ___ radios are not property of LAFD.
UHF
VHF
________ are mounted on towers or buildings to provide the dispatch or repeater coverage throughout the city.
Fixed site attends
The most basic practical antennas are
Omni- directional
Radio frequency interference can be either
Natural or man made
There are three basic modes of operation for a radio system;
Simplex, duplex, simulcast
In “Duplex” mode, two frequencies are used. The “__” leg frequency is defined as mobile to base. The “____” leg frequency is defined as base to mobile
Up leg
Down leg
the simulcast system sends out the “_____” leg at all transmit sites, thereby maximizing coverage to units in the field.
Up leg
To provide a more balanced system, receivers are networked together throughout the city in a
Receiver voter system (RVS)
The RVS usually is located at tech control at
METRO
A______ in a digital radio converts analog voice to a digital interpretation from an audio sample.
VOCODER
In an analog system, the clarity and intelligibility of the transmission, as received by the user, decrease directly as the signal level _____.
DECREASES
Another solution to improving communication between field units inside buildings or tunnels and dispatch and other on-scene units is the
Bidirectional amplifiers
To overcome radio system in-building coverage difficulties, ___ often are used to rebroadcast the system in buildings.
BDAs
There are many types of BDAs; all require electrical power and some type of antenna system. Often the antenna systems are installed in the _____ spaces of commercial structures.
Plenum spaces
BDAs
These antenna systems are generally nothing more then ____ ____ ____ cable which runs to the amplifier. The amplifier is generally located in a communications or alarm system room.
Plastic coated coax
Nokia Theatre Getty Center City Hall East Staples Center MTA Tunnels
All have
BDAs
trunked radios communicate with each other through ___ or ____ repeaters
Two or more
_____ _____ can be placed by trained and qualified members to resolve radio coverage in areas which may have compromised coverage.
Portable repeaters
__________ enable the “linking” of different radio bands into a common system.
Portable cross banks link
_____ ____ Leaders in the NIMS Command structure provide a central point of contact to develop a communications plan(ICS 205) to meet the interoperability needs on a large incident.
Communication unit leaders
IMPRES chargers automatically turn off at the end of a charge cycle yet continue to electronically monitor IMPRES batteries every ___minutes to determine when more energy should be applied to the battery.
5 mins
After replacement, the Battalion office shall notify the ___ _______ Section telephonically of the need to have a radio repaired.
Fire communications section
Non-operative MDC’s represent approximately __% of all mobile repairs.
39%
is a stand alone transceiver/radio which provides connectivity between a vehicle’s MDC and the Department Data Radio Network.
Vehicular radio modem
The radio data is also loaded into the mobile radios of all command vehicles. This is called the
Radio alias table
All members shall carry and operate their radio in the _____ mode
Repeat mode
the LAFD portable radio (700/800 MHz) will continue to attempt to send the emergency signal (long tone every ___ seconds) for ___ seconds.
Two
60
With the radio “unlocked”, turning the radio off, and then back on ___ ____ return the radio to its original function.
Will not
The radio can be changed from “direct” mode to “repeat” mode with the radio in the
Locked position
ALERT 6 is moved to the ____ position on the channel select rotary knob in all zones.
16th
is Continuous Tone Coded Subaudible Squelch (CTCSS), it may also be called “channel guard” or “Quiet Channel”, or simply “tone control”.
Mpl tones
