Olson Technology OTLT 3000 Instruction Manual

OTL T / OTLR 3000 Manual

L-Band Fiber Optic Link

500 - 3,000 MHz

INSTRUCTION MANUAL

REV. X4 06/19/08

Phone:

E-Mail: [e-mail]

[phone]
[phone]

Fax:

[phone]

www.olsontech.com

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
TYPICAL Applications 10

MDU (Multiple Dwelling Unit) 10

ANTENNA REMOTING 11

BASIC CWDM APPLICATION 11
ORDERING INFORMATION 12

REV. X4

Page 2

SAFETY

Safety Precautions

The optical emissions from the units are laser-based and may present eye hazards if improperly used. NEVER USE
ANY KIND OF OPTICAL INSTRUMENT TO VIEW THE OPTICAL OUTPUT OF THE UNIT . 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

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.

NEVER look 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.

BEFORE applying power.

NEVER, NEVER, NEVER look 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 WILL cause 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.

REV. X4

Page 3

GENERAL FEATURES

The OTLT linear fiber optic transmitter and the OTLR linear fiber optic receiver form the basic L-Band Fiber Distribu­tion 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 distri­bution. The extended frequency range to 3.0GHz allows this to accommodate additional transponders including Euro­pean satellite communications applications. The enhanced bandwidth also facilitates stacked LNB applications to
accommodate additional transponders containing enhanced DBS services (HDTV, local channels, etc.) over single­mode 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 IP3 to -20°C -9.5dBm
Gain vs. Temperature Tx= 0.12dB/°C Rx= 0.09dB/°C
Max. Total RF Power in -14dBm

REV. X4

Page 4

Input 1 dB Compression

REV. X4

Frequency Response

Page 5

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
Rx Alarm 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 8V

DC

12V

DC

15V

DC

18V

DC

24V

DC

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.

REV. X4 Page 6

TX JUMPER JP1

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 +8V

to +24 VDC and the Black Wire is ground or -. The flying cable also has a shield wire that can be connected

DC

to ground to help shield any external signals. The Brown (may also be White) Wire is an Open Collector Low Optical
Level Alarm that alarms when the optical level falls below -15 dBm.

Rx JUMPER JP1

Flying Lead Signal Description:

COLOR Tx/Rx SIGNAL DESCRIPTION

Red Tx DC Input, 8-24 V

DC

Black Tx Ground, DC Return
Silver Tx Shield, Shield wire, connect to Ground
Red Rx DC Input, 8-24 V

DC

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.

REV. X4

Page 7

Cleaning Optical Connectors

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 connec­tors, gently press in until the connector “clicks” in to place.

Physical Size

REV. X4

Page 8

Mounting

Mounting Template

REV. X4

Page 9

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 (Multiple Dwelling Unit)

REV. X4

T ypical Multiple Dwelling Unit

Page 10

ANTENNA REMOTING

REV. X4

BASIC CWDM APPLICATION

Page 11

ORDERING INFORMATION

Transmitters

Model OTRT-D301x-X3-ZA Transmitter, 500MHz-3GHz, +3dBm Optical Output, 75 Ohm (F Conn.)
Model OTRT-D301x-X4-ZA Transmitter, 500MHz-3GHz, +4dBm Optical Output, 75 Ohm (F Conn.)
Model OTRT-D301x-X5-ZA Transmitter, 500MHz-3GHz, +5dBm Optical Output, 75 Ohm (F Conn.)

Receivers

Model OTRR-D3000-XX-ZA Receiver, 500MHz-3GHz, RF, 1270-1610nm, 75 Ohm (F Conn.)

Power Supply

Model OTLB-PS-15DC Power Supply, 110 V

NOTES:

1) The “Z” in all part numbers specifies the optical connector type: FA = FC/APC; SA = SC/APC.

2) The lowercase “x or “xx”” in the Tx part numbers specifies the wavelength: 13 = 1310nm; 15 = 1550nm, xx =

CWDM (47 to 61).

3) The uppercase “X” in the Tx part numbers specifies the laser type: F = FP; I = Isolated FP; D = DFB; C =

CWDM.

4) The uppercase “X” in the Rx part numbers specifies the gain: LG = low gain; HG = high gain.

Input and +15 VDC Output

AC

REV. X4

Page 12