Books 3, 8, 11, 20 Flashcards
(250 cards)
Book 11 - A bidirectional amplifier (BDA) in a building is generally located in a communications or _______ room.
- Communications or alarm system room
Book 11 - IMPRES radio battery chargers automatically turn off at the end of a charge cycle yet continue to electronically monitor IMPRES batteries every ____ minute(s) to determine when more energy should be applied to the battery.
- 5 minutes
This process assures that the battery maintains a very high state of charge without sustaining heat damage due to the charger.
Book 11 - All ____, 800 MHz radio channels, MDT messages and phone calls into, and from Metro Fire Communications are recorded on a 24-hour basis.
- 18 - radio channels
Book 11 - If the portable radio emergency trigger button is pushed and no acknowledgement is received, the LAFD portable radio (700/800 MHz) will continue to attempt to send the emergency signal (long tone every two seconds) for ____ seconds.
- 60 seconds
If no acknowledgement is received by the radio from the network within 60 seconds, the radio has failed to access a repeater and communication is not possible.
Book 11 - When describing the frequencies used by common radio systems, the ______ system is used to quantify the magnitude of the frequency.
- Metric system
Book 11 - Regarding a newsworthy incident, if the incident escalates to a ______ alarm or larger incident, a Code ____ notification is automatic.
- Greater alarm or larger
- Code 20
Book 11 - In general, all mobile and portable radio antennas are omni-directional to provide coverage ____ degrees around the radio user.
- 360 degrees
Book 11 - The Communications Unit Leaders in the NIMS Command structure provide a central point of contact to develop a communications plan (ICS ____) to meet the interoperability needs on a large incident.
- ICS 205
Book 11 - All radios are assigned a ____ digit identification number that is transmitted and recorded each time a radio is keyed.
- 4 digit
Book 11 - The Department has a supply of portable 800 MHz repeaters which can be placed by trained and qualified members to resolve radio coverage in areas which may have compromised coverage. A classic problem area for the LAFD is the ________ area in Battalion 5.
- Kirkwood Bowl area
Book 11 - When exchanging a broken portable radio from the Battalion cache, who shall ensure that the replacement radio identification number is updated with METRO?
- Battalion Commander
Book 11 - Non-operative MDC’s represent approximately ____% of all mobile repairs.
- 39%
This frequent problem results from the Vehicular Radio Modem (VRM) occasional unresponsiveness or locking up, as indicated by “NEG ACK” (negative acknowledgement). In a majority of documented cases, a simple re-boot of the MDC and VRM corrected the failure.
Book 11 - The LAFD voice system operates in the ____ MHz range, and the data system operates in the ____ MHz range.
- Voice - 800 MHz range
- Data - 500 MHz range
Book 11 - LAFD radio transmitters amplify signals to a maximum of ____ watts.
- 155 watts
The FCC limits transmitter power to a level that would not adequately cover the entire city even if is was flat. LAFD radio transmitters amplify signals to a maximum of 155 watts. Contrast that to KMPC-AM, for example, which transmits with 50,000 watts of broadcast power. Yet, even with this powerful broadcast there are areas up canyons, behind building/mountains, etc. that do not receive a signal. Therefore in order to cover the city as well as reasonably possible, the LAFD radio system is built around multiple transmit/receive sites.
Book 11 - The Hospital Emergency Administrative Radio (HEAR) can be found on _____ radios.
- VHF radios
Very High Frequency (VHF/100MHz) - used by surrounding fire agencies for tactical and routine operations. Also used as the Hospital Emergency Administrative Radio (HEAR). VHF Portable radios are indicated with white engravings and a white antenna band.
Book 11 - LAFD portable radios are provided to the field in ____ different bands.
- 3 - different bands
- 700/800 MHz
- UHF
- VHF
Book 11 - In “______”, one frequency is used, the transmitting radio is in direct mode, all receivers and transmitters are tuned to the same transmit and receive frequency.
- “Simplex”
When one unit is transmitting, all other units in the area are able to receive. Units are able to communicate affectively as long as they are within range.
The receiving radios will receive the transmitting unit message regardless if they are simplex or duplex mode. However, to transmit back to the originating unit, the receiving unit must also be in the simplex mode. What is necessary to understand is that in simplex or direct mode, the signal transmitted by the broadcasting unit is transmitted on the “down” leg frequency of the duplex or “repeat” channel.
Book 11 - A sound approach for members to follow for tactical communications would be communications indicating at least their….
- 3.
- Conditions
- Actions
- Needs
Book 11 - The length of a radio antenna is related to the wavelength with which the antenna is designed to operate. In general, the higher the frequency of the waves used by the radio, the ______ the antenna on the radio.
- Shorter
Book 11 - What Section repairs broken portable radios?
- Fire Communication Section
Book 11 - Does MFC normally monitor tactical channels?
- No
Book 11 - The Department has additional “simplex” or “direct” digital channels in the ____ MHz band programmed in the XTS 5000 portable radios carried by all members, and the XTL 5000 mobile radios installed in late model apparatus.
- 700 MHz
These channels are available for use only in “simplex” or “direct” mode at this time. There are three 700 MHz digital channels licensed to the LFD located at the end of Zones 7, 8 and 9, accessed via the front panel key pad identified as channels 7TAC19D, 7TAC20D and 7TAC21D. “7” identifies it as a 700 MHz channel, “TAC19” identifies the channel number and the “D” identifies the channel as a digital channel. There are additional 700 MHz National Emergency Response Interoperability channels in Zone 7, beginning with 7TAC51D.
Book 11 - The 700/800 MHz portable radio has a ______ colored “band” on the antenna and ______ colored lettering.
- Red
- Red
Book 11 - When a radio system must cover a large area, but the number of available frequencies is limited, a simulcast transmitter system may be the solution. In the case of the LAFD, _____ site(s) are synchronized.
- 9 - sites
The advantages of a simulcast system are the coverage of a large area, with high signal levels throughout the area, while using only a single frequency.