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FIPLEX FLEX CERTIFICATION 2025 EXAM ACTUAL EXAM
200 QUESTIONS AND CORRECT DETAILED ANSWERS|
ALREADY GRADED A+
Class A BDA's have some disadvantages when compared to Class B BDA's. Which of the following is not a Class A BDA disadvantage? - CORRECT ANSWER >>> Class A BDA's cannot deal with the Near-Far effect as well as Class B BDA's What is the name of the BDA's antennas inside of a building? - CORRECT ANSWER >>> Service Which name do you NOT want to use when referring to a Bi-Directional Amplifier and/or its entire system? - CORRECT ANSWER >>> Repeater What do the IFC and NFPA do? - CORRECT ANSWER >>> Provide recommendations, not laws. Each jurisdiction chooses what their codes are but are often either the IFC or NFPA recommendations. Uplink refers to... - CORRECT ANSWER >>> Signals from the Mobile to the Donor Site What could a municipality do if a new construction does not provide adequate Public Safety Comms? - CORRECT ANSWER >>> Withhold a certificate of Occupancy What is the name of the BDA's antennas outside of a building? **- CORRECT ANSWER
** Donor Which of the following is not a band utilized in the USA for emergency responders? - CORRECT ANSWER >>> EHF
Downlink refers to.... - CORRECT ANSWER >>> Signals from Donor site to the Mobile Which statement best describes the function of a BDA? - CORRECT ANSWER >>> Re-transmits outside signals to the inside and inside signals to the outside What is max UL output power per band of the Fiplex 700/800 MHz BDA? **- CORRECT ANSWER
** 24 dBm (0.25 Watts) May the Fiplex 700/800 MHz BDA be ordered as a class A or class B BDA? - CORRECT ANSWER >>> Yes, ordered as class B and field upgradeable to class A with license key May the Fiplex 700/800 MHz BDA be ordered as an AC or DC powered device? - CORRECT ANSWER >>> Yes, order as either AC or DC What size conduit fitting does the 700/800 BDA have? - CORRECT ANSWER >>> 3/4" Which must be true to communicate with a Fiplex 700/800 MHz BDA? **- CORRECT ANSWER ** A USB connection and FCS (Fiplex control software) or an RJ-45 Ethernet connection and computers web browser May the Fiplex 700/800 MHz BDA be ordered with a DL power of 27 dBm (0.5 Watts), 33 dBm ( Watts) or 37 dBm (5 Watts)? - CORRECT ANSWER >>> Yes, when ordered, it will be 27 or 37 dBm and the 27 dBm unit is field upgradeable to 33 dBm What is max amount of narrow-band channels a single-band Fiplex 700/800 MHz BDA can be equipped with? - CORRECT ANSWER >>> 64 DL/UL pairs per band When a Fiplex 700/800 MHz BDA is configured in Class A mode, how many filter bandwidth options are there per narrow-band channel? - CORRECT ANSWER >>> 8
What is true about the VHF/UHF BDA's power supply options? - CORRECT ANSWER >>> Both AC and DC power supplies are included for standard downlink power but, for high-power downlink, it is either AC or DC Are the DL powers of each band of the Fiplex VHF/UHF BDA equal to one another? - CORRECT ANSWER >>> No, the VHF DL power is lower than the UHF power How many cabinet sizes are available for Fiplex VHF/UHF BDA? - CORRECT ANSWER >>> 3 What can be done if the filitering requirements result in a duplexer that wont fit into the Fiplex VHF/UHF BDA enclosure? - CORRECT ANSWER >>> Fiplex can custom design and build an external filter or order as a 4 port Are the batteries enclosed in the BBU and wired correctly when shipped from the factory? - CORRECT ANSWER >>> No, the batteries are shipped in separate boxes and must be wired together and to the BBU How many batteries are in the 55 Amp-hr and 100 Amp - hr BBUs? **- CORRECT ANSWER
** Both contain 2 How many anchor bolts are reqd to mount the DH7S 700/800 wall mounting bracket to the wall? - CORRECT ANSWER >>> 3 The BBU has a red cable and a black cable to connect to the batteries. Where are they connected? - CORRECT ANSWER >>> Red cable is connected to the red terminal of one battery, the black cable connects to black terminal of the second battery What is NOT on the USB drive included with BDA? - CORRECT ANSWER >>> Videos of this training program
How many inches of space should be allowed all around the DH7S 700/800 BDA after it is mounted? - CORRECT ANSWER >>> 4" If Fiplex BDA and BBU are used together, how many connections are needed between the 2 units? - CORRECT ANSWER >>> 2, one for alarms the other for DC power When observing the LED status indicators, what would normal operation look like? - CORRECT ANSWER >>> PWR LED continuous green, all others off How is Fiplex DH7S 700/800 BDA turned on? - CORRECT ANSWER >>> Just apply power What is TRUE about the wall mounting bracket for DH7S 700/800 BDA **- CORRECT ANSWER
** It is included with the BDA- it is attached to the unit from factory Which is NOT an advantage of a long Fiber Optic cable over a long coax cable? - CORRECT ANSWER >>> Fiber optic cable is much less prone to accidental physical damage than Coax Do all Active DAS's use Fiber Optic cable? - CORRECT ANSWER >>> NO What part of an active DAS gets connected to inside service antennas? **- CORRECT ANSWER ** Remote Does an active DAS amplify both inside signals and outside signals going in and out of a building? - CORRECT ANSWER >>> Yes Why would a DAS be used instead of a BDA? - CORRECT ANSWER >>> If the venue is large, a BDA may not be able to cover its entirety but a DAS can
Can enterprise remotes of different DL power share an enterprise master unit? - CORRECT ANSWER >>> No Does the enterprise fiber DAS master channelize the signals from the donor and apply AGC? - CORRECT ANSWER >>> Yes How many remotes may be directly connected to a enterprise fiber DAS master? - CORRECT ANSWER >>> 4 May the Fiplex Enterprise Fiber DAS 700/800 remote be ordered with a DL power of 27 dBm (0.5 Watts), 33 dBm (2 Watts) or 37 dBm (5 Watts)? - CORRECT ANSWER >>> No, units can be ordered as either 33 dBm or 37 dBm What does the enterprise fiber DAS master have that the BDAs dont have? - CORRECT ANSWER >>> Fiber ports to serve the remotes Describe the service antenna ports of the enterprise fiber DAS - CORRECT ANSWER >>> The VHF/UHF units have simplexed service antenna ports while the 700/800 units have duplexed May the fiplex enterprise fiber DAS 700/800 Master and remote be ordered as AC or DC powered device? - CORRECT ANSWER >>> Yes, order either Mater/remote as either AC or DC What are the enterprise fiber DAS's Fiber optic link budget and back reflection specifications? - CORRECT ANSWER >>> 5 dBo link budget, - 45 dB back reflection Which component of the Public Safety centric DAS channelizes the Uplink? - CORRECT ANSWER >>> Remote unit
Are the PSC fiber DAS masters and remotes available as single band modes? - CORRECT ANSWER >>> Yes and no, the VHF and UHF bands may be single-band but not the 700/ units are always dual-band Does the Fiplex PSC fiber das 700/800 MHz Ober-the-air master have both AC and DC power supplies included? - CORRECT ANSWER >>> Yes, both AC and DC power supplies are included
- only connect one or the other How many remotes may be connected directly to a PSC fiber DAS master? - CORRECT ANSWER >>> 8 How many zones can an PSC fiber das have? - CORRECT ANSWER >>> 8 Which statement best describes the Rack mounted fiber DAS master? **- CORRECT ANSWER
** It can handle all bands: VHF,UHF, 700 & 800 but only VHF/UHF or 700/800 at a time What is max UL output power of the fiplex PSC DAS master and remote? **- CORRECT ANSWER ** Remotes and Rack mounted master do not have UL PA. Over-the-air master is +24 dBm Which Fiplex active DAS is meant for the toughest RF environments for all public safety frequency bands? - CORRECT ANSWER >>> PSC DAS Which statement best describes the redundancy features of the Public safety centric fiber DAS? - CORRECT ANSWER >>> Both: Redundant fiber runs from a single master or 2 masters feeding the same remote What advantages of a digital fiber transport over an analog one? - CORRECT ANSWER >>> All 3 answers are correct (Less noise, More tolerant of optical back reflection, longer max distance)
Does a small das master have its own DL power amplifier to cover a zone? - CORRECT ANSWER >>> Yes How many strands of fiber is there between a small DAS master and one of its remotes? - CORRECT ANSWER >>> One How many small DAS remotes may be connected to a single small DAS master? - CORRECT ANSWER >>> 2 Do the small DAS master and remotes need to be ordered with a specific type of power supply?
- CORRECT ANSWER >>> Yes, units are either DC or AC What are the states of the BBU's front panel LED indicators? - CORRECT ANSWER >>> Normal AC Power is green or off, all others are red or OFf Which BBU alarm would be indicated when the downlink power from the donor antenna is low? - CORRECT ANSWER >>> Donor antenna malfunction Which BBU alarm would be indicated with a defective DL power amplifier? - CORRECT ANSWER >>> RF Emitter fail Do the btty-100055 BBU and btty-100100 BBU have the same cabinet size? - CORRECT ANSWER >>> Yes How many hours of battery backup is expected from the BTTY-100100 BBU while connected to a high-power unit? - CORRECT ANSWER >>> 12 Hours
What type of connector is used on the BBU to attach the remote annunciators? - CORRECT ANSWER >>> A single RJ-45 port. Other remote annunciators are daisy chained from the first one Which must be true to communicate with Fiplex BBU? - CORRECT ANSWER >>> A USB connection with operations and maintenance software installed on your computer. How many hours of battery backup is expected from the btty-100055 BBU while connected to a low or id power unit? - CORRECT ANSWER >>> 12 hours Where are most of the ports on the Fiplex BBU? - CORRECT ANSWER >>> On the top How many hours of battery backup is expected from the BTTY-100100 BBU while connected to a low or mid power unit? - CORRECT ANSWER >>> 24 hrs How many remote annunciators may be connected to the BBU? - CORRECT ANSWER >>> 4 (through daisy chaining) What passive component splits or combines a bands downlink and uplink? - CORRECT ANSWER >>> Duplexer What passive component splits an input signal equally among its outputs? - CORRECT ANSWER >>> Power Splitter What is the most popular type of RF connector is the public safety passive system? - CORRECT ANSWER >>> N
Which of he following alarms is potentially a BDA hardware malfunction that may require an RMA? - CORRECT ANSWER >>> TX Power Low When is the 'Auto PA Off' feature engaged? - CORRECT ANSWER >>> Whenever all uplink signals are below their squelch threshold for a period set from 1 to 60k mins What happens after an oscillation is detected? - CORRECT ANSWER >>> It depends on how the 'Action after alarm' is set What is the minimum isolation required that will not cause automatic reduction in max gain? - CORRECT ANSWER >>> 105 dB If an alarm is active and its associated relay is closed, what is true? **- CORRECT ANSWER
** The relay is normally open What is the minimum gain of a Fiplex BDA? - CORRECT ANSWER >>> 55 dB Which is NOT an 'Extreme Temperature Action' choice - CORRECT ANSWER >>> Reduce both DL & UL outputs by 6 dB How many output relays are there in the BDA? - CORRECT ANSWER >>> 4 If you change a relays delay setting from 10 secs to 60 secs, what additional step must be performed for the BDA to accept the new value? - CORRECT ANSWER >>> Click on 'Apply changes' text Is there downlink squelch thresholds per narrow-band filter in a class A BDA? - CORRECT ANSWER >>> Yes
When in class B operation, the BDA offers two wide-band adjustable filters. Are they also available during class A operation? - CORRECT ANSWER >>> Yes Is there Uplink squelch thresholds per narrow-band filter in a Class A BDA? - CORRECT ANSWER >>> No What can be displayed on the BDA's spectrum analyzer? - CORRECT ANSWER >>> DL or UL, both in and out, but one band at a time Does the BDA allow over-lapping adjacent filters? - CORRECT ANSWER >>> No, you receive an error message until offending filters are adjusted to be non-overlapping When do downlink and uplink overload alarms become active? **- CORRECT ANSWER
** When the frequency bands composite input power exceeds - 5 dBm If when trying to adjust the Uplinks 'Main Gain' to 85 dB, the BDA refuses to accept the value, what might be the issue? - CORRECT ANSWER >>> The isolation measurement value is less than 105 dB Can squelch be turned off? - CORRECT ANSWER >>> Yes What must be done if any filter is set wider than 75 kHz? - CORRECT ANSWER >>> Place the class B label on the side of the BDA, and register it with the FCC At what composite power level is Broadband AGC activated for both downlink and uplink? - CORRECT ANSWER >>> - 35 dBm What is filter tool used for? - CORRECT ANSWER >>> Allows all channels of a band to be
entered as a set and the tool calculates the best filter center frequencies, all at 150 kHz BW.
When adjusting the 'Time Limit to Trigger Alarm' of the 'Donor Antenna Failure Adjustment', what should be taken into consideration? - CORRECT ANSWER >>> If there is a control channel or not. If not, it should be set to a long time, maybe 24 hrs. If a control channel is present, it can be set in the seconds range When performing the Assisted GUI Uplink max power calculation, the GUI asks for... - CORRECT ANSWER >>> The Donor Towers Radios output power Where should the Carrier-to-Noise threshold typically be set? - CORRECT ANSWER >>> 17 dB below weakest signal Typically, where should the squelch be set? - CORRECT ANSWER >>> 10 dB below the weakest wanted signal When adjusting uplink max power out... - CORRECT ANSWER >>> Set at the lowest value possible without dropping below the min for good audio quality When the assisted GUI was initially launched, it was only available on the 700/800 BDA - CORRECT ANSWER >>> True Both Narrow-band and wide-band filters can both be set up simultaneously in the assisted gui - CORRECT ANSWER >>> False When looking at the spectrum analyzer plots in the assisted gui, you notice vertical gray bars - CORRECT ANSWER >>> They indicate the programmed filters Does FCS show the measured isolation when connected to an Enterprise DAS Master? - CORRECT ANSWER >>> No, instead of measured isolation, it displays min. allowable attenuation
Does FCS show the main gain when connected to an enterprise DAS master - CORRECT ANSWER >>> No, instead of main gain, it shows attenuation When connected to an enterprise DAS master, where do you discover which remote is generating an alarm? - CORRECT ANSWER >>> Scroll to the bottom of the 'Status' page where each remotes status is displayed What are the laser and photo diodes as seen in FCS while connected to an enterprise DAS master? - CORRECT ANSWER >>> The laser diode generates the light and the photo diode receives the light at the opposite end of the fiber optic cable While connected to an enterprise DAS master, the remotes cant be seen in FCS. What is most likely the cause? - CORRECT ANSWER >>> All three of these answers could be correct (remotes aren't powered up, fiber cables aren't connected, remotes weren't assigned unique board #s via pFOMS) While connected to an PSC DAS Master, where is 'Antenna Isolation' run? - CORRECT ANSWER >>> It is performed in the 'Remote' area. It must be performed individually for every remote. While connected to an PSC DAS master, where is the delay between the master and each remote displayed? - CORRECT ANSWER >>> Under 'fiber optic interface' area of the master While connected to a PSC DAS master, how does the 'Automatic' setting for 'master mode' work when there are redundant masters? - CORRECT ANSWER >>> The master connected to the remotes SFP module #1 is the primary master unless user selectable alarms in that mast are detected, of which it will switch to the secondary master While connected to a PSC DAS master, what is the purpose of 'Linked UL/DL Frequencies'? - CORRECT ANSWER >>> Normally the UL and DL filters are in the same unit (BDA/ Enterprise
If power to BDA/Master needs to be entirely removed, which EPO method should be deployed?
- CORRECT ANSWER >>> Insert a DPST (Double pole single throw) switch between a BBU and the BDA/Master Use the link budget calculator in resources to answer this question: If composite DL power of a BDA/Remote is 37 dBm what is the DL channel power if there are 7 channels? - CORRECT ANSWER >>> 29 dBm Use the link budget calculator in resources to answer this question: What is max DL input power for 12 channels before broadband AGC kicks in? - CORRECT ANSWER >>> - 46 dBm Use the link budget calculator in resources to answer this question: 69 dB of gain is how much attenuation for a Fiplex DAS? - CORRECT ANSWER >>> 16 dB What is the best option if either FirstNet or T-mobile 800 signals are causing Broadband AGC? - CORRECT ANSWER >>> Place a band-specific filter between the Donor antenna and the BDA. Use the link budget calculator in resources to answer this question: What is the minimum DL input power for 25 channels, max composite DL power of 33 dBm and 85 dB of gain? - CORRECT ANSWER >>> - 66 dBm Use the link budget calculator in resources to answer this question:
How much further will Noise in the 800 MHz band with an EiRP of - 40 dBm travel as opposed to
- 50 dBm before both are reduced to thermal noise in a 12.5 kHz Bandwidth? - CORRECT ANSWER >>> 2743 feet Use the link budget calculator in resources to answer this question: If the composite UL power of a BDA/Master is 24 dBm, what is the UL channel power if there are 10 channels? - CORRECT ANSWER >>> 14 dBm Use the link budget calculator in resources to answer this question: What is expected UL Noise power out of BDA donor port with: 85 dB of gain, Noise figure of 4 dB, zero remotes and a 10 kHz RBW (assume squelch is off) - CORRECT ANSWER >>> - 45 dBm Use the link budget calculator in resources to answer this question: What is FSPL of a UHF signal over 5 miles? - CORRECT ANSWER >>> 104 dB Use the link budget calculator in resources to answer this question: If FirstNet is to be amplified, what percentage of total composite power is allocated for it? - CORRECT ANSWER >>> 50% or 3 dB less than composite
