Term
| In an optical system that includes a laser, optical detector and fiber, which anser best descricbes the flow of conversions between electrical and opoitcal ? |
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Definition
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Term
| Which statement best describes the construction of optical fiber? |
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Definition
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The cladding reflects the light and keeps most of the light contained in the core
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Term
Tighter bends may be used during installation (loaded) as long as the fiber is not bent as tight once it’s unloaded.
true or flase
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Definition
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Term
| What is the general guideline for the bend radius of a loaded optical cable? |
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Definition
| answer : 15 times the outer diameter |
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Term
| The jacket around a fiber cable protects the fibers from water, ice and contaminants. |
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Definition
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Term
| What color is fiber tube #7? |
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Definition
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Term
| Duplex cables are used for bi-directional applications. |
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Definition
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Term
| What type of connector is used to connect multiple connectors at once? |
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Definition
| answer: MPO\MTP Connector |
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Term
| what does the baseband digital modulation do ? |
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Definition
| it encodes digital 1'S and 0's into pluses of light |
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Term
| Baseband digital modulation can go long distances because high levels are not required to detect the 1’s and 0’s. |
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Definition
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Term
| is this statement about analog intensity modulation is true? |
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Definition
| the RF signal from an optical receiver can be amplified and fed directly into an RF coaxial network. |
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Term
To amplify the optical signal, optical amplifiers automatically convert the optical signals to electrical and then back to optical again.
true or flase ? |
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Definition
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Term
WDMs can be used to put multiple wavelengths onto a single fiber, but only if all signals are headed in the same direction.
true or flase ? |
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Definition
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Term
FTTP is generally used to describe networks in which the fiber extends to within several hundred miles of the home or not all the way to the home.
true or flase |
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Definition
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Term
Mid-split architecture will increase the upstream bandwidth being provided to the customer.
ture or false |
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Definition
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Term
| What device will take the incoming coming fiber from the headend or hub site and distribute it to within 1000 feet from the customer? |
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Definition
| answer : Multiplexing Point |
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Term
EPON and GPON networks use an Ethernet interface to the customer's equipment
true or false |
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Definition
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Term
| Which statement is NOT true about RFoG? |
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Definition
| answer : RFoG networks can only carry analog video and cannot be used for QAM signals |
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Term
After aiming a fiber at an infrared detection card and seeing no indication of light, it is safe to look directly into the end of a fiber.
true or false |
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Definition
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Term
another name for the infrared card is ?
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Definition
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Term
| What does node + 0 refer to? |
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Definition
| An architecture with no RF amplifiers after the node. |
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Term
What was the purpose of the trunk network?
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Definition
| To carry the RF signals from the headend to the general serving area. |
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Term
The majority of the optical loss in a PON network is due to the loss of the fiber.
true or false
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Definition
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Term
| What is the downstream wavelength for RFoG? |
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Definition
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Term
This device converts the downstream optical signal to an electrical RF signal and converts the upstream RF signal into an optical signal.
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Definition
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Term
EPON and GPON networks use ________________ of the optical signal rather than the analog intensity modulation that is used by RFoG networks.
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Definition
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Baseband digital modulation
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Term
GPON and EPON both use the 1490 nm band in the downstream and the ______ band in the upstream.
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Definition
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Term
| What is the minimum voltage needed in order for a node to operate? |
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Definition
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Term
Which tool is used to cut the fiber so that the fiber end is flat?
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Definition
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Term
As an extra feature, many OTDRs are designed to produce light in the 1650 nm range so that it is possible to do OTDR shots on active networks without disrupting service.
true or false |
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Definition
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Term
What is the purpose of a WDM filter in optical power meter or OTDR?
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Definition
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To allow measurements of specific wavelengths when multiple wavelengths are active in the fiber simultaneously
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Term
| Per wavelength, what is maximum number of home passed in a fiber deep system? |
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Definition
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Term
| If you have a 2-way optical splitter, what is the maximum distance to the node that is possible without the use of an EDFA? |
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Definition
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Term
Green SC/APC connectors have better return loss than blue SC/UPC connectors because they have an angled polish.
true or false |
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Definition
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Term
Field installable connectors require a fusion splicer to connect them to the fiber.
true or false |
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Definition
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Term
Which optical distribution network (ODN) architecture is most like the tapped feeder architecture used in conventional HFC networks?
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Definition
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Distributed tap architecture
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Term
You can avoid aerial trespass by following telephone and power company routes.
true or false |
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Definition
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Term
The climbing space at a pole must be
inches wide |
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Definition
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Term
Lashing wire makes a good point of attachment for the span clamp.
true or false |
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Definition
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Term
When connecting at the tap what port should you connect the fiber drop to?
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Definition
| The port identified in the splicing matrix/system documentation. |
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Term
| Span length sags should be approximately ___________________ |
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Definition
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Term
| Drop clearance over a street (typical practice) should be_______ feet. |
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Definition
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Term
| What is the first thing an installer should do during a FTTP trouble call? |
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Definition
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Term
Which option describes zone A?
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Definition
| The actual glass fiber that transmits the signal |
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Term
Compressed canned air will blast away dirt on a fiber end face.
true or false |
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Definition
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Term
| Which splice has less power loss? |
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Definition
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Term
| Which type of splice requires the fibers to be cleaved? |
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Definition
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Term
What is the purpose of a cleaver?
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Definition
| To leave a clean, perpendicular end that is ready for splicing |
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Term
What is the typical loss of a mechanical splice?
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Definition
| Between 0.2 dB and 0.25 dB |
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Term
Why is an index matching gel used for mechanical splices?
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Definition
| To reduce the amount of reflection loss |
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Term
What is the first step when doing a fusion splice?
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Definition
| Insert a heat-shrink sleeve onto one of the fibers. |
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