RFS HYBRIFLEX mMIMO Instruction sheet

RFS INSTALLATION GUIDELINES
HYBRIFLEX® mMIMO | 603400209500 | July 2019
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Page 1 of 32
mMIMO HYBRIFLEX
®
Guidelines and Instructions

RFS INSTALLATION GUIDELINES
HYBRIFLEX® mMIMO | 603400209500 | July 2019
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Page 2 of 32
Table of Contents
Introduction to HYBRIFLEX® ............................................................................................................................ 3
HYBRIFLEX Feeder Configuration ................................................................................................................... 3
Transporting, Shipping and Handling the Drum ............................................................................................. 5
Handling HYBRIFLEX Cable.............................................................................................................................. 5
Hoisting/Pulling HYBRIFLEX Cable .................................................................................................................. 6
HYBRIFLEX Bending ......................................................................................................................................... 7
Fixation/Mounting of the Cable ..................................................................................................................... 9
Monopole Installation Instructions ................................................................................................................ 9
Fiber Inspection ............................................................................................................................................ 14
Fiber Cleaning Introduction .......................................................................................................................... 15
HYBRIFLEX Armor Trimming Procedure ....................................................................................................... 20
Grounding Kit Installation ............................................................................................................................. 23
HYBRIFLEX Bulkhead Connector Fitting Installation ..................................................................................... 24
HYBRIFLEX Power Splice 4AWG to 6AWG Instruction .................................................................................. 25
HYBRIFLEX Power Splice 4AWG to 4AWG Y Splice Instruction..................................................................... 27
HYBRIFLEX Power Splice 4AWG to 6AWG Y Splice Instruction..................................................................... 28
HYBRIFLEX Tower Accessories ...................................................................................................................... 31

RFS INSTALLATION GUIDELINES
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Introduction to HYBRIFLEX®
RFS’ HYBRIFLEX Remote Radio Head (RRH) hybrid feeder cabling solution combines multiple elements,
including optical fiber and DC power, for RRHs in a single lightweight cable, making it the world’s most
innovative solution for RRH deployments. It was developed to reduce installation complexity and cost at
macro sites. HYBRIFLEX allows mobile operators deploying RRH architecture to standardize the RRH
installation process. HYBRIFLEX combines optical fiber, power and alarm wire in a single jacketed cable and
can connect multiple RRHs with a single feeder. Standard RFS CELLFLEX® coaxial cable accessories may be used
with HYBRIFLEX cable. Both pre-terminated and on-site terminated options are available. The rugged jacket
and copper wrapped armor facilitates easy transportation, handling, and installation.
These short instructions were written for qualified and experienced personnel. They describe, in few words,
the main points that MUST be noted during installation, without any claim of completeness.
Any liability or warranty for results of improper or unsafe use is disclaimed!
General remarks:
In principle, care must be taken to avoid all such strain that may cause permanent deformation on the cable,
e.g. going below admissible bending radii, kinking, applying too high tensile stress or forcible deformation (e.g.
pulling over sharp edges, over tightening of clamps etc.).
HYBRIFLEX Feeder Configuration
This installation guideline supports HYBRIFLEX cable available in small, medium and large riser trunk
configurations, 1x16, 2x16, 4x24, 5x24, 3x48 and 6x48. The trunk cable assemblies comprise of 4 or 6 AWG DC
wires and up to forty-eight (48) pairs of Multi-Mode fiber, terminated with ODVA, D-LC, MPO or outdoor rated
MPO connectors, depending upon the configuration.
HYBRIFLEX trunk cable assemblies are factory constructed specifically to suit this application, ensuring
trouble-free installation. Additional features that ease installation and ensure durability throughout service
life include:
 Robust breakout design with identified optical fibers and power conductors
 Stranded construction for easy bending and maximum fiber protection
 Copper wrap shield protects from crush and animal damage
 Integrated rip cords for length management
 Factory test certificate available for every cable assembly
 Smartly packaged, easy fiber end face access for pre-testing
The installation instructions here within, apply to (but not limited to) the following HYBRIFLEX families:

RFS INSTALLATION GUIDELINES
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Generic
Description Type DC Pairs
DC gage
(AWG)
Cross
Section
(mm
2
) DC Type
Fiber
Pairs
Fiber
type
Fiber
Termination
Top
Fiber
Termination
Bottom Armor Model Name
1x16 Hybrid Jumper Riser to
fiber
Jumper
1 6 13.4 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
16 MM ODVA D-LC Copper
Tape
HB058-13U1M16-xxxF
1x16 Hybrid Jumper Riser to
RRH
1 4 21 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
16 MM ODVA D-LC Copper
Tape
HB078-21U1M16-xxxF
2x16 Hybrid Jumper Riser to
RRH
2 4 21 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
24 MM ODVA D-LC Copper
Tape
HB078-21U2M16-xxxF
4x24 Hybrid Riser Riser to
fiber
Jumper
4 6 13.4 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
24 MM ODVA D-LC Copper
Tape
HB114-13U4M24-xxxF
4x24 Hybrid Riser Riser to
fiber
Jumper
4 4 21 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
24 MM ODVA D-LC Copper
Tape
HB114-21U4M24-xxxF
5x24 Hybrid Riser Riser to
fiber
Jumper
5 4 21 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
24 MM ODVA D-LC Copper
Tape
HB158-21U5M24-xxxF
3x48 Hybrid Riser Riser to
fiber
Jumper
3 6 13.4 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
48 MM ODVA D-LC Copper
Tape
HB078-13U3M48-xxxF
3x48 Hybrid Riser Riser to
fiber
Jumper
3 4 21 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
48 MM ODVA D-LC Copper
Tape
HB114-21U3M48-xxxF
3x48 Hybrid Riser Riser to
fiber
Jumper
3 6 13.4 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
48 MM MPO D-LC Copper
Tape
HB114-13U3MP48-xxxF
3x48 Hybrid Riser Riser to
fiber
Jumper
3 4 21 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
48 MM MPO D-LC Copper
Tape
HB114-21U3MP48-xxxF
6x48 Hybrid Riser Riser to
fiber
Jumper
6 4 21 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
48 MM ODVA D-LC Copper
Tape
HB158-21U6M48-xxxF
6x48 Hybrid Riser Riser to
fiber
Jumper
6 4 21 Jacketed red/black
unshielded pairs;
individually jacketed
red and black wires in
the bulk
48 MM MPO D-LC Copper
Tape
HB158-21U6MP48-xxxF
Typical Application

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Transporting, Shipping and Handling the Drum
Drums must be handled carefully to avoid any damage to the drum and/or the hybrid cable.
 If the drum will be shipped by van or truck the drum must be secured against rolling. Pay special
attention to careful loading and unloading. Do not roll the drum from high levels (load floor) of the
vehicle without protective measures, e.g. roll the drum from the vehicle by using planks as a ramp. Do
not drop the drum!
 If forklifts are used, the forks must be long enough to engage both flanges of the drum at the same
time to avoid cable damage.
 If a crane is used, a special hanger is necessary to ensure vertical application of forces and thus
avoiding damage of the drum flanges and the cable.
 Do not lay the drum on its side, reels must be transported and handled in their up-right position only
(the cable could be deformed due to its own weight).
 Make sure that the cable end is always properly sealed and fixed as close as possible to the drum core.
 Note the recommended rotation direction of the drum, which is shown by an arrow on the drum
flange (during installation/pulling of the cable the drum will be on drum stands and will then be
turned in the opposite direction to unwind the cable).
 If the drum is completely protected by wooden planks, these should not be removed before the drum
is placed (transported) to the final position.
Handling HYBRIFLEX Cable
Upon receiving the HYBRIFLEX shipment it is highly
recommended that the drum be inspected for any
physical damage and all fiber connection points be
tested.
Do not drag the cable over sharp edges. If, it can’t be
avoided to drag the cable over sharp edges, protective
measures must be taken, if necessary by positioning an
additional rigging at those critical places.
To protect the cable against any damage, protective
measures must be taken. This is also applicable if cables
must be pulled in horizontal runs (example: using pipe
rollers, wooden planks or similar).
Prevent any pinches to the DC wires, which may cause
electrical spikes and shorten circuitry.

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Hoisting/Pulling HYBRIFLEX Cable
 Note: when hoisting and pulling HYBRIFLEX always use caution.
 Do not remove the protective sleeve. If it is removed during pre-testing, re-attach securely before
hoisting the cable.
 Do not attach the hoisting grip over the protective sleeve.
 Hoisting grips should be attached no less than 20 inches from the breakout point.
HYBRIFLEX cable is supplied in specific cut lengths with fully terminated and polished factory connectors.
Short lengths of small HYBRIFLEX can be hoisted manually, otherwise
a winch is recommended. Provide a pulley high enough on the tower
to enable the HYBRIFLEX line to be raised sufficiently.
Attach a hoisting grip (do not use a closed lacing style) using tie back
rope or additional electrical tape if needed to prevent any stress or
force to fiber and electrical wire. When using pre-installed hoisting
grips, simply adjust it to the desired section of the cable and clamp it
or use heavy duty tape to secure it.
For every long vertical run of cable, additional hoisting grips should be
attached at 50-60m intervals.
Add the hoist line to the hoisting grip or rope sling; protect the
HYBRIFLEX against shackles.
Keep slack in the cable between the hoisting grips in case more than
one is needed. Ensure that the slack is maintained during hoisting.
Hoist the cable slowly.
Rotation of the reel must be slow to prevent buckling of the cable.
When unspooling, keep the reel secure so that it does not accidentally
roll over the unprotected components.
If it is necessary to drag the cable over sharp edges of buildings or
tower members, protective measures must be taken.
Careless handling can damage the cable jacket eventually causing
damage to fiber end face which may render the entire HYBRIFLEX line
length useless.
If the cable is hoisted inside the tower, feed it into the tower base and
keep its top off the tower steel work. Please refer to the Monopole
installation section of this document.
Caution! The protective sleeve should not be removed until
installation is complete.
Hoisting Grips: 1 for every 100ft of vertical run. For heavier runs, such
as 1-5/8” 4AWG, use 2 hoisting grips for every 200ft vertical run.
Hoisting Grip
Always secured
with electrical
tape or tie wrap
before applying
tension
Protective
sock
Do not Hoist
without Sock
Minimum
18.12 FT

RFS INSTALLATION GUIDELINES
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HYBRIFLEX Bending
 The minimum-bending radius should be strictly observed. [See product spec sheet].
HYBRIFLEX cable should be bent manually with a force applied in a distributed manner, pressing
carefully while the hand slides along the cable [see diagram 1]. Avoid rapid, sharp motions.
 Avoid any tight micro bends near the fiber end face as micro bends can cause broken fiber and
increase insertion loss. [See diagram 2&3].
Helpful Tip: Hybrid cables that utilize copper outer shield, are easy to bend, but must be handled carefully to
avoid damage to internal elements.
 Do not twist the cable, e.g. if changing from vertical to horizontal runs [See diagram 4]
 Do not leave the Hybrid cable hanging in a long free space, e.g. during the installation under a
platform. In adverse conditions, additional protective measures may have to be taken [for example
see picture 1].
Protective measures:
temporary fixation of the cable
As shown from side (upper) and
top (lower) view, do not swing
the cable horizontally creating a
twist in the vertical run
As shown from side view, rather
form a large bow and pull and
guide the cable horizontally
without creating any twist
Pull carefully
bit by bit
While pressing, slide your hand
Diagram 1
Diagram 3
Diagram 2
Diagram 4

RFS INSTALLATION GUIDELINES
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HYBRIFLEX Bending
Minimum Bending Radius
• Minimum bend radius is the tightest bend an installer can bend a section of the cable without causing
performance degradation and/or damage. Refer to product data sheet for specific hybrid cable bend
radius.
RFS specifies two types of minimum bending radius for a cable.
• Single bend – irreversible minimum bend section of the cable
• Repeated bend – reversible minimum bend section of the cable
HYBRIFLEX Bending
Repeated bend radius, can be
reversed without damage or cable loss.
For single bend radius, DO NOT reverse.
Doing so will damage and increase cable loss.

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Fixation/Mounting of the Cable
Crush resistance may vary for different outer materials. This should be considered when tightening the clamps
(especially if these clamps have not been approved by RFS).
Several different clamps may be used, we recommend using the SNAP-IN type. The SNAP-IN is suitable for all
fixing situations while at the same time it is a safer clamp (less chance of failure) offering many advantages.
The recommended and maximum clamp spacing shown in table 1 must always be considered. The small
spacing applies to severe site conditions (wind load, icing, etc.); whereas the greater/recommended spacing
can be used for less exposed cable runs (e.g. indoor applications).
Table 1
HYBRIFLEX
Size
Spacing
HBF058 [5/8”]
0.7m (28”)
HBF078 [7/8”]
0.9m (3ft”)
HB114 [1
-
1/4”]
1.3m (4.25ft)
HB158 [1
-
5/8”]
1.5m
(5ft)
Monopole Installation Instructions
All below configurations are options for mMIMO pre-terminated multi-mode risers.
Tower Risers – 3 Initial Variations
 3 Pair x 6AWG DC with 48 Multi-Mode (MM) Fiber Pairs – typical application < 125 ft.
 3 Pair x 4AWG DC with 48 Multi-Mode (MM) Fiber Pairs – typical application 125 ft. to < 230 ft.
 6 Pair x 4AWG DC with 48 Multi-Mode (MM) Fiber Pairs – typical application >230 ft.
Sectorized Risers / Rooftop / Monopole – 3 Initial Variations
 1 Pair x 6AWG DC with 16 Multi-Mode (MM) Fiber Pairs – typical application < 120 ft.
 1 Pair x 4AWG DC with 16 Multi-Mode (MM) Fiber Pairs – typical application 125 ft. to < 230 ft.
 2 Pair x 4AWG DC with 16 Multi-Mode (MM) Fiber Pairs – typical application >230 ft.
Jumpers – 2 Initial Variations
 4 Pair Multi-Mode Fiber-Only
 3 Pair Multi-Mode Fiber Only
Discrete DC Cable
 2 x 6AWG – 1500 ft. Reels – (Available: 10 ft., 20 ft., 30 ft. 40 ft., 50 ft. and 100 ft.)
 2 x 4AWG – 1500 ft. Reels – (Available: 10 ft., 20 ft., 30 ft. 40 ft., 50 ft. and 100 ft.)
HYBRIFLEX Installation Instructions for 3x48 and 6x48 Configurations within a Monopole
Installations using 3x48 and 6x48 large riser trunk configurations MUST be considered on a case-by-case basis
based upon the site walk and awareness regarding tower loading.

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Helpful Tip: If the monopole is extremely full, top-down installation should be considered. If that is not
possible and incumbent loading is excessive, exterior mounting should be pursued, if local zoning restrictions
allow.
Top-Fed Pre-Installation Notes
• RFS recommends a complete site survey prior to installation, to insure the correct type and size of
hybrid cable to be utilized.
• Monopoles may be congested due to existing transmission lines. Exterior mounting options should be
explored where there are no zoning restrictions regarding this practice.
• Interior monopole installation of cable should be evaluated on a case-by-case basis based upon tower
loading as the potential risk of damage to the fiber components is very high.
• Review the spooling direction of each hybrid reel as the cable may need to be spooled in reverse to
accommodate top to bottom feeding.
• In the advent of a top-fed installation, adequate rigging must be utilized to support the weight of the
cable as it is fed to the top of the tower.
• Due to DC power wire gauge, these hybrid cables may be heavier than traditional transmission lines.
Use caution when feeding from the top to bottom and request additional manpower as needed.
• Use extreme caution when inserting the protective sleeve containing the LC connectors that connect
to the BBU. As you bring them into monopole port hole (top exit port) great care must be taken.
• Due to the interior design of the monopole, traditional cable hangers cannot be used to support the
weight of the hybrid - locate the hook in the upper portion of the monopole to support the cable as it
is fed descending in the monopole.
• Top installation within a monopole should ONLY be considered if tower loading is extremely light or
this is the first cable in a Greenfield site. Also, RFS recommends assessing the exit port size for
viability of cable exiting without excessive stress on fiber connectors and brake outs. Please refer to
the Monopole – Hoisting from the Bottom section of this document.