Olson Technology OTLT 3000 User manual

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OTLT/OTLR 3000Manual
L-BandFiberOpticLink
500 - 3,000 MHz
INSTRUCTION MANUAL
REV. X4 06/19/08
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E-Mail: [email protected]
www.olsontech.com

REV. X4 Page 2
INSTALLATION MANUAL 1
L-Band Fiber Optic Link 1
SAFETY 3
Safety Precautions 3
Laser Safety Procedure 3
GENERAL FEATURES 4
RF PERFORMANCE 4
OPTICAL PERFORMANCE 6
DC POWERING AND ALARMS 6
Flying Lead Signal Description: 7
INSTALLATION 7
Optical Connectors 7
Cleaning Optical Connectors 8
Physical Size 8
Mounting 9
TYPICALApplications 10
MDU (Multiple Dwelling Unit) 10
ANTENNA REMOTING 11
BASIC CWDM APPLICATION 11
ORDERING INFORMATION 12

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SAFETY
Safety Precautions
The optical emissions from the units are laser-based and may present eye hazards if improperly used. NEVERUSE
ANYKINDOFOPTICALINSTRUMENTTOVIEWTHEOPTICALOUTPUTOFTHEUNIT. Be careful
when working with optical fibers. Fibers can cause painful injury if they penetrate the skin.
Laser Safety Procedure
ALWAYS read the product data sheet and the laser safety label before powering the product. Note the operation
wavelength, optical output power and safety classifications.
If safety goggles or other eye protection are used, be certain that the protection is effective at the wavelength emitted
by the device under test BEFOREapplying power.
ALWAYS connect a fiber to the output of the device BEFORE power is applied. Power should never be applied
without an attached fiber output. If the device has a connector output, a connector should be attached that is connected
to a fiber. This will ensure that all light is confined within the fiber waveguide, virtually eliminating all potential hazard.
NEVERlook at the end of the fiber to see if light is coming out. NEVER!Most fiber optic laser wavelengths (1310nm
and 1550nm) are totally invisible to the unaided eye and will cause permanent damage. Shorter wavelengths lasers
(e.g. 780nm) are visible and are very damaging. Always use instruments, such as an optical power meter to verify light
output.
NEVER,NEVER,NEVERlook into the end of a fiber on a powered device with ANY sort of magnifying device.
This includes microscopes, eye loupes and magnifying glasses. This WILLcause a permanent and irreversible burn on
your retina. Always double check that power is disconnected before using such devices. If possible, completely
disconnect the unit from any power source.
If you have questions about laser safety procedures, please call OLSON TECHNOLOGY INC. (OTI) before
powering your product.

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GENERAL FEATURES
The OTLT linear fiber optic transmitter and the OTLR linear fiber optic receiver form the basic L-Band Fiber Distribu-
tion System. The wide bandwidth of 500MHz to 3,000MHz allows for a wide variety of communications applications
including L-Band satellite antenna remoting, trunking radio, telemetry tracking and time and frequency reference distri-
bution. The extended frequency range to 3.0GHz allows this to accommodate additional transponders including Euro-
pean satellite communications applications. The enhanced bandwidth also facilitates stacked LNB applications to
accommodate additional transponders containing enhanced DBS services (HDTV, local channels, etc.) over single-
mode fiber for DBS distribution.
These stand-alone versions are designed for mounting in outdoor enclosures or in other small spaces. For powering,
the stand-alone units both the transmitter and receiver can be powered via the wire leads or on the center of the coax
connector.
RF PERFORMANCE
The specifications are cited below with 12dB link optical loss and >55dB optical return loss. RF input level to Tx
@12dBmV, the level to the high gain Rx is -9dBm Optical Power unless otherwise specified.
RF Frequency Range 500-3,000MHz
Amplitude Flatness ±1.5dB for any 500MHz, ± 0.35dB for any 40 MHz
Return Loss 10 dB
I/O Connector F-Type Female (75 Ohms) Standard)
Link Gain @ 25°C -4 ± 5 dB
Noise Figure with -9dBm Optical Pwr to Rx 45dB MAX, typically better than 32dB
CNR @ 12dBmV IN, 27MHz BW Better than 17.7dB
Input 1 dB Compression to -20°C >-17dBm, see chart next page for typical performance
Input IP3to -20°C -9.5dBm
Gain vs. Temperature Tx= 0.12dB/°C Rx= 0.09dB/°C
Max. Total RF Power in -14dBm

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Input1dBCompression
Frequency Response

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OPTICAL PERFORMANCE
Optical Fiber Single Mode 9/125μm ( Corning SMF-28 or Equivalent)
Tx/Rx Optical Return Loss >55dB
Tx/Rx Optical Connector SC/APC (Standard) FC/APC (Optional)
Rx Wavelength 1270-1610nm
Rx Optical Input Power -15 to +3dBm
RxAlarm Standalone Optical Input Power Low ( Open Collector Output)
Trip level set for optical levels less than -15dBm
Tx Model # -302 -304 -505 -5XX
Tx Laser Type Fabry-Perot DFB DFB DFB/CWDM
Tx Output Power 3dBm 5dBm 4dBm 4dBm
Tx Wavelength 1310 1310 1550 XX
Tx/Rx Link Optical Budget 0 to -18dB 0 to -20dB 0 to -19dB 0 to -19dB
XX= 47, 49, 51, 53, 55, 57, 59, 61 for each of the available ITU-grid CWDM wavelengths.
DC POWERING AND ALARMS
The current requirements for the Tx and Rx units are as follows:
Input Voltage 8VDC 12VDC 15VDC 18VDC 24VDC
Tx 250mA 170mA 135mA 115mA 85mA
Rx 200mA 150mA 120mA 100mA 70mA
CAUTION!
The standalone packages possess the flying leads which carry DC inputs and alarms. When connecting to these leads,
any unused wires should be wrapped with electrical tape to avoid shorting that could damage the unit.
The Tx standalone unit has built in bias-T for remote powering of the LNB or could be used to power Tx though the RF
connector, this feature can be enabled or disabled (Factory Preset) by moving the internal jumper, see picture below.
The Tx unit is normally fed via the two flying leads, the Red Wire is +8VDC to +24 VDC and the Black Wire is ground
or -. The flying cable also has a shield wire that can be connected to ground to help shield any external signals.
TXJUMPERJP1

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The Rx standalone unit can be powered though the RF connector, this feature can be enabled or disabled (Factory
Preset) by moving internal jumper, see picture below. The Rx unit is normally fed via the two flying leads, the Red Wire
is +8VDC to +24 VDC and the Black Wire is ground or -. The flying cable also has a shield wire that can be connected
to ground to help shield any external signals. The Brown (may also be White) Wire is an Open Collector Low Optical
LevelAlarm that alarms when the optical level falls below -15 dBm.
Rx JUMPER JP1
Flying Lead Signal Description:
COLOR Tx/Rx SIGNALDESCRIPTION
Red Tx DC Input, 8-24 VDC
Black Tx Ground, DC Return
Silver Tx Shield, Shield wire, connect to Ground
Red Rx DC Input, 8-24 VDC
Black Rx Ground, DC Return
Silver Rx Shield, Shield wire, connect to Ground
Brown Rx Open Collect Output for Low Received Optical Power
INSTALLATION
Optical Connectors
There are many optical connectors on the market. There are also different ways the optical cable is terminated such as
“Flat” and “Angled”. We use only use APC type of connectors Angled Precision encountered in the field is the use of
the wrong type of connectors. The most common is using SC/PC (Flat) with SC/APC(angled). The connectors will fit
together but the optical loss will be in the neighborhood of 10 dB.

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CleaningOpticalConnectors
Fiber optic connectors on the cable come pre-terminated should be clean and capped, so one can usually remove the
cap and make the connection without cleaning the connector, but, if there is any doubt it is good practice to clean the
optical connectors before making the connection. Once the connection is made, there should be no need clean the
connector as long as the connector remains connected.
Use caution when handling the connectors. Any grease from your finger, scratch or small piece of dust or dirt can effect
the optical performance. To clean use a lint free wipe such as Kimwipes or cotton swab, moisten with alcohol and
gently wipe the tip of the connector. Let the connector air dry completely or use dry compressed air to dry.
When making the connection be sure the key is aligned with the bulkhead connector. In the case with the SC connec-
tors, gently press in until the connector “clicks” in to place.
PhysicalSize

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Mounting
Mounting Template

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Mount modules to enclosure using #8 screws and split lock washers. It is suggested that the modules be mounted with
the RF and Optical connectors mounted down to prevent moisture from entering. For a watertight seal, pot the optical
connectors with RTV. If the enclosure provides enough water protection you can skip this step.
There are no user adjustments on modules. To optimize Tx RF input, external attenuators maybe required.
* Connect the optical fiber to both the transmitter and receiver. Insure the optical loss to the receiver is less
than the maximum allowed
* Verify the proper RF level out of the LNB and connect the LNB output to the RF input of the transmitter
* Connect the RF out of the receiver to the distribution amplifier or TV set top receiver
* Apply power to both modules, the system should now be operational as there are no user adjust
ments required on the modules
TYPICAL Applications
MDU(MultipleDwellingUnit)
Typical MultipleDwellingUnit