Lindsay broadband Lha35rm User manual

LHA35RM 1 GHz MDU Distribution Ampliﬁer

Installation Manual

Page 1 of 3

Lindsay’s multiple dwelling unit broadband distribution ampliﬁer is a full-featured two-way 1 GHz indoor station capable of 44 dBmV output with superior characteristics

and low noise.

The LHA35RM is a tough indoor MDU ampliﬁer speciﬁcally designed for broadband distribution systems in apartment buildings, hotels, schools, hospitals and similar

facilities requiring RF ampliﬁcation. Designed to mount directly to a wall with increased heat dissipation properties and low-power consumption, this ampliﬁer runs cool

and reduces operational costs. Flexible two-way diplex ﬁlter options and the latest GaAs FET technology provide superior distortion performance and low noise to

1 GHz.

FEATURES

•Aluminum diecast, wall-mountable housing

•Designed for superior heat dissipation

•Rated ingress protection IP54, against dust & water

•Temperature-Cycled: -10°C to +55°C (+14°F to +131°F)

•Forward gain 35 dB; reverse gain 18 dB

•Input variable equalizer, plug-in interstage equalization

•GaAs-FET push-pull technology for high output levels with low distortions

•Forward & reverse, 20 dB gain controls

•6 kV surge protection on all ports

•Designed for -100 dB EMI isolation

•Self-powered, 117 VAC

•Diplex ﬁlters available in 42/54 MHz

PRODUCT OVERVIEW

Part # Power Socket Type Frequency Range

LHA35RM 90-130 VAC 5-42 MHz / 54-1000 MHz

CAUTION

Risk of electric shock. Do not open.

No serviceable parts inside. Refer servicing to qualified service personnel.

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.

Remember to replace cover after adjusting. Cover must be in place for CE, safety and protection.

FUNCTIONAL SCHEMATIC

LHA35RM

(front angled view)

LHA35RM 1 GHz MDU Distribution Ampliﬁer Installation Manual

Page 2 of 3

SPECIFICATIONS

Parameter Speciﬁcation

(1)

Forward GaAs FET Push-Pull Reverse

Bandwidth 54-1000 MHz 5-42 MHz

Full Gain (Min.)

(2)

35 dB 18 dB

Flatness ± 1 dB

Return Loss In/Out -16 dB

Test Points -30 dB (output)

Gain Control Variable 0-20 dB (input) 0-20 dB (output)

Slope Control Variable 0-20 dB cable (input)

Fixed Equalizers

(3)

Mid-stage

Forward Distortions: 42 dBmV ﬂat output (79 channels)

(4)

CTB On CH 78 -62 dBc

CSO On CH 78 -66 dBc

XMOD On CH 2 -60 dBc

Forward Distortions: ref 44 dBmV output (79 channels, 12 dB intersage slope, 54-1000 MHz)

(4)

CTB On CH 78 -65 dBc

CSO On CH 78 -72 dBc

XMOD On CH 2 -63 dBc

Reverse Distortions: 52 dBmv ﬂat output, 4 CH

3rd on T10 T8+T9-T7 -68 dBc

2nd on T9 T7+12 MHz -65 dBc

XMOD on T10 T7, T8, T9, T10 -64 dBc

Noise Figure 7 dB

Group Delay Fwd (55, 25-58.83 MHz) 38 ns (max.)

Rev (41-42 MHz) 35 ns (max.)

Power, Environmental & Physical

Hum Modulation -70 dB

RFI Isolation 5-1000 MHz -100 dB

Surge Withstand In/Out IEEE C62.41-Cat A3, 6 kV, 200 A

Powering Mains, 117 VAC

Power Consumption 8 W

Enclosure IP54 category, diecast aluminum

Operating Temperature -10°C to +55°C (+14°F to +131°F)

Dimensions (H x W x D) 7.6”H x 5.4”W x 3.0”D (19.3H x 13.7W x 7.6D cm)

Weight 3.8 lb (1.7 kg)

NOTES:

(1) Speciﬁcations are typical, for T=20°C, ZIN=ZOUT=75 ohms

(2) Tolerance on station gain is ± 2.0 dB

(3) Model GE XX equalizers available in 12 & 14 dB at 1000 MHz

(4) Digital output levels are lower

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 & SETUP GUIDELINES

1. Adjustable gain and cable slope controls are reachable under the cover. Refer to layout scheme for adjustable controls.

2. This product is shipped with default 0 dB pad for plug-in interstage equalization.

3. 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 set the input gain control adjustment to minimum gain (fully counter clockwise) before powering the LHA.

4. Set the input equalizer control for minimum slope (fully clockwise) and install a 0 dB plug in equalizer (factory installed) into the mid-stage equalizer socket.

5. Now apply power to the ampliﬁer and measure the ampliﬁer forward output level at the 30 dB output test point. If it is very low then turn the input gain control

clockwise to increase the gain until the desired output level is reached at the highest operating frequency. Remember that the level measured at the test point is 30

dB lower than the real signal level.

6. Turn the input equalizer control to adjust the forward 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.

LHA35RM 1 GHz MDU Distribution Ampliﬁer Installation Manual

INSTALLATION PRECAUTIONS TABLE

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

2-2035 Fisher Dr, Peterborough, ON K9J 6X6 Canada

+1.705.742.1350 • 1.800.465.7046 • support@lindsaybb.com • lindsaybb.com

service marks, and company names in this document are the property of their respective owners. All information is subject to change without notice.

Rev. 06/21 (LBB0375) • Page 3 of 3

INSTALLATION & SETUP GUIDELINES CONT'D.

7. Now install a plug-in equalizer 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.

8. Make a ﬁnal adjustment of the slope and output level with the input gain and slope controls. Always adjust the gain control, then the slope control in that order.

9. Remember to replace cover after adjusting.

ORDERING INFORMATION

Part # Description