Lindsay Broadband LHA 1.2 GHz DOCSIS 3.1 Series User manual

LHA Series CATV Distribution Amplifiers
Model Bandwidth Powering
LHA38RMA - 1.2 GHz
5-42 MHz / 54-1218 MHz
5-85 MHz / 102-1218 MHz
5-204 MHz / 258-1218 MHz
40-90 VAC
External Powering
LHA series CATV distribution amplifiers are designed for RF distribution systems such as those in
apartments/MDUs, hotels, hospitals and other applications where a high quality low noise figure amplifier is
necessary to amplify the signals in both the forward and return paths.
The LHA38RMA fills out the selection of 1.2 GHz distribution amplifiers giving you extra reach and higher output.
Designed with flat operational gain of 38 dB in the forward band and 24.5 dB in the reverse band.
The LHA38RMA has sockets for JXP-style plug-in controls, including input and mid-stage pad and equalizer for
forward bandwidth balancing, and input pad plus output pad and equalizer for reverse path balancing. Universal
JXP-style pads are used for both attenuator and equalizer functions. Upstream frequency is flexible and can be
upgraded to 204 MHz with field-replaceable diplex filters and equalizer sub-board.
The amplifiers are externally powered via separate AC input. (40-90 VAC).
FEATURES
• Fully meets the requirements of DOCSIS 3.1
• Downstream frequency bandwidth extends to 1.2 GHz
• Multiple diplex filter frequency split options
• Operating temperature from -30°C to + 55°C (-22°F to +131°F)
• Forward gain 38 dB and reverse gain 24.5 dB
• GaAs-FET Push Pull for high output levels with low distortions
• JXP style plug-in controls
• RFI housing
• SCTE compliant F-type connectors
• Surge protection on all ports
• Diecast aluminum housing for heat dissipation
Instruction Manual
LHA Series 1.2 GHz | DOCSIS®3.1
1
English
Rev. 01/19 (LBB0102)

English
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SPECIFICATIONS
(1) Band selection by on-site plug-in diplex filters and plug-in return path
equalizers. Please contact factory for other upstream/downstream band
selections.
(2) Universal JXP stype pads. 0dB jumper pads are factory default.
BLOCK DIAGRAM
(3)On-board equalizer circuit on forward path.Slope (dB) is selected via universal
JXP style plug-in pads.
(4)Plug-in equalizer board on return path. Slope (dB) is selected via universal JXP
style plug-in pads.
Parameter Notes Forward Reverse Units
Bandwidth (1) 54-1218 102-1218 258-1218 5-42 5-85 5-204 MHz
Technology GaAs GaAs
Average Full Gain 38 24.5 24.5 22 dB
Flatness <+/-1 ( Gain at 102 MHz: min.36.5 dB) <+/-1 "
Return Loss, IN/OUT -16 (< 1 GHz), -14 (1 to 1.2 GHz) -14 "
Test Points, Frw IN/Rev OUT bidirectional -20 -20 "
Test Points, Frw OUT/Rev IN bidirectional -20 -20 "
Gain Control JXP plug-in (2) in/mid in/out
Slope Control JXP plug-in (2),(3),(4) in / mid out
Forward Distortions: 40/50 dBmV output level (77 NTSC analog channels plus 111 equivalent digital SC-256-QAM channels to 1218 MHz)
CTB on ch78 -67 dBc
CSO on ch78 -69 "
Xmod on ch2 -73 "
CIN -57
Forward Distortions: 36/46 dBmV output level (77 NTSC analog channels plus 111 equivalent digital SC-256-QAM channels to 1218MHz)
CTB on ch78 -83 dBc
CSO on ch78 -74 "
Xmod on ch2 -80 "
CIN -70
Reverse Distortions: 52 dBmV flat output, 2 ch according to ANSISCTE1152006
DTO on 7 MHz -68 dBc
DSO on 6 MHz -75 "
Xmod on T10 -66 "
Noise Figure with 0 dB jumpers 6 (< 1 GHz), 7 ( 1 to 1.2 GHz) 6 dB
Recommended RF Input Level 9 (single)
13 (cascaded) dBmV
Group Delay
CH2 (55,25-58,83 MHz)
<35
nsec
CH98 (109,25-112,83 MHz )
CH15( 259,25-263,08 MHz )
204-203 MHz
<30
nsec
41-42 MHz
84-85 MHz
5-6 MHz
Hum Modulation -80 dBc
RFI Isolation -100 "
Surge Withstand IEEE C62.41-Cat B3, Combination Wave 6 KV, 3 KA
Powering External Powering, 40-90 Vac
Power Consumption 15 Watts
Temperature -30 to +55 (-22 to +131) Deg C (F)
Enclosure IP54 Category, Diecast Aluminium
Weight 2.8 (6.2) kg (lb)
Dimensions 21 x 17 x 9 (7-5/8 x 5-3/8 x 3) cm (in)
Rev. 01/19 (LBB0102)
Instruction Manual
LHA Series 1.2 GHz | DOCSIS®3.1

WARNING: TO PREVENT SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.
THIS APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING WATER AND NO OBJECTS FILLED WITH LIQUIDS, SUCH AS
VASES, SHALL BE PLACED ON THE APPARATUS.
WARNING: THIS PRODUCT IS A CLASS-I CONSTRUCTION. PLEASE ENSURE A CONNECTION TO POWER SOURCE INCLUDES A
PROTECTIVE EARTHING CONNECTION.
NO SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
REMEMBER TO REPLACE COVER AFTER ADJUSTING.
COVER MUST BE IN PLACE FOR CE, SAFETY AND PROTECTION.
CAUTION The exclamation point within an
equilateral triangle is intended to
alert you to the presence of
important operating and main-
tenance (servicing) instructions in the
literature accompanying the product.
The lightning flash with arrowhead symbol
within an equilateral triangle is intended to
alert you to the presence of uninsulated "
dangerous voltage " within the products
supplementary external power supply
encousure that may be of sufficient magnitude
to constitute a risk of electrical shock to
persons.
Risk of Electric Shock
Do not Open !
PRECAUTIONS REQUIREMENT
Facilitate service and maintenance Allow a minimum of 35 in. (90 cm) clearance in front of the equipment rack(s)
Avoid direct heating or air conditioning If unavoidable, use deflector plates
AC power source outlets Locate equipment near sufficient outlets to provide power for test equipment and power tools
Rack support Make certain rack supports are sufficiently rigid to support rack(s)
Building leakage Beware of dripping water onto equipment from leaky roofs, waveguide roof entries, and cold water pipe condensations.
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INSTALLATION PRECAUTIONS TABLE
NOTE TO CATV SYSTEM INSTALLER
This reminder is provided to call the CATV system installer’s attention to Article 820-40 of the NEC that provides guidelines for
proper grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building, as
close to the point of cable entry as practical.
INSTALLATION AND SETUP GUIDELINES
1. Band selection modules, gain and cable slope controls are reachable under the housing lid. Refer to layout scheme on the cover
under the housing lid for controls adjustment.
2. This product is shipped with default 0 dB pad for all plug-in attenuator and equalizer sub-board.
3. Band selection is made by plug-in diplex filters and plug-in return path equalizers. Please check the ordering information on
page 4 and contact factory for upstream/downstream band selections other than the factory default.
4. Before applying power to the amplifier make sure that the forward input level to the amplifier is not too high or damage to the
amplifier might occur. To be on the safe side, you should select the input fixed attenuator to a max. value (e.g: 20 dB) before
powering the LHA.
5. Please check that the forward equalizers and mid-stage pad are set to 0 dB as factory default values.
6. Now apply power to the amplifier and measure the amplifier forward output level at the 20 dB output test point. If it is very low
then adjust the value of the input fixed attenuator until the desired output level is reached at the highest operating frequency.
Remember that the level measured at the test point is 20 dB lower than the real signal level.
7. Install a plug-in JXP pad in the forward input equalizer socket in order to activate the equalization function to adjust the output
level to be flat across the full bandwidth. The input signal level will now be flat too. Under this condition there will be best CNR
across the full bandwidth.
8. Now install a plug-in JXP pad in order to activate the onboard equalization function, into the forward mid-stage equalizer socket
to get as close as possible to the desired output signal slope. The desired output slope is determined by your system design.
Consult your system planner or your system maps for this information.
9. If you are having trouble obtaining the expected output levels then check the input test point to verify that the levels are as
expected at the input of the amplifier. The forward set-up is complete.
10. For the reverse path, inject into the forward output test point test carriers with the system design input signal level plus 20 dB
(because the test point has 20 dB loss) at each end of the upstream band.
11. Verify that the upstream reference test point (Note: this is commonly called the “X point” and it is measured at your node, or
optical receiver, or at the 1st downstream amplifier. Consult with your system designer) has the proper upstream output signal
levels. If it does not then select the appropriate fixed attenuator and equalizer and install them in the reverse amplifier output
sockets.
12. Record the in/out operating levels and the pad and equalizers used in this station.
English
Rev. 01/19 (LBB0102)

Ordering Information (LHA38RMA-1.2 GHz)
4
Note:
All products are factory installed with one set of plug-in Diplex
Filters (DF.....), one plug-in Equalizer Sub-Board on return path
(EQ..) and 0 dB Attenuator pads (ATTxx)
Universal JXP style pads applicable for both attenuator and
equalizer functions.
Ordering Code for
Accessories Definition
DF4254-01 Input Diplex Filter Module,
for 42/54 MHz version (1.2 GHz)
DF4254-02 Output Diplex Filter Module,
for 42/54 MHz version (1.2 GHz)
ATT-xx
Fixed attenuator (JXP style – 1")
XX (Value in dB): 1 to 26 dB in 1 dB
steps
(0 dB factory pre-installed)
JXP pads are applicable for both
attenuator and equalizer functions.
• JXP-style are rectangular attenuators / pads with pins arranged in-
line (0.125 inch ctr. - ctr. spacing)
• Pins are 0.038 inch diameter
• JXP style attenuators / pads can be inserted in two ways (flipped
180 degrees), and provides the same performance either way
MECHANICAL DIMENSIONS: JXP TALL ATTENUATOR
JXP SPECIFICATIONS & ORDERING MATRIX
DF85102-01 Input Diplex Filter Module,
for 85/102 MHz version (1.2 GHz)
DF85102-02 Output Diplex Filter Module,
for 85/102 MHz version (1.2 GHz)
DF204258-01 Input Diplex Filter Module,
for 204/258 MHz version (1.2 GHz)
DF204258-02 Output Diplex Filter Module,
for 204/258 MHz version (1.2 GHz)
EQ42 Plug-in equalizer sub-board on return
path for 42/54 MHz version (1.2 GHz)
EQ85 Plug-in equalizer sub-board on return
path for 85/102 MHz version (1.2 GHz)
EQ204 Plug-in equalizer sub- board on return
path for 204/258 MHz version (1.2 GHz)
English
Rev. 01/19 (LBB0102)
Instruction Manual
LHA Series 1.2 GHz | DOCSIS®3.1