Olson Technology OTLT-87XX-40-SA User Manual

Table of Contents

OTLT-87XX-40-SA

L-Band DWDM Transmitter

Instruction Manual

Phone: [phone]

[phone]

FAX: [phone]

E-Mail:[email protected]

025-000538 REV 1 4/06/09 Page 1

Table of Contents

SAFETY WARNINGS .......................................................

INTRODUCTION ..........................................................

INSTALLATION / ENVIRONMENTAL

CONSIDERATIONS ........................................................

OPTICAL CONNECTORS AND

CLEANING ................................................................

INTERNAL CONTROLS ....................................................

EXTERNAL CONTROLS AND TEST

POINTS ...................................................................

INITIAL SETUP ...........................................................

ACCESSORIES ............................................................

3
4

4

5
5

6
6
6

025-000538 REV 1 4/06/09 Page 2

SAFETY WARNINGS

LASER RADIATION

The OTOT-87XX laser transmitters emit invisible radiation
that can cause permanent eye damage.

EXPOSURE TO BEAM.

Operate the transmitter only with the proper optical fiber installed in the
transmitter optical connector. Power to the OTOT-87XX should be turned-off or preferably,
disconnected whenever the optical connector cover is opened and there is no installed fiber (as
when the fiber connector is being installed or removed from the transmitter connector).

NEVER

TRANSMITTER. “OPTICAL INSTRUMENT” INCLUDES MAGNIFYING GLASSES, ETC.

USE ANY OPTICAL INSTRUMENT TO VIEW THE OUTPUT OF THE LASER

AVOID DIRECT

NEVER
NEVER

TRANSMITTER.

NEVER

END OF A FIBER THAT MAY BE CONNECTED DIRECTLY OR VIAAN OPTICAL
SPLIT, TO A TRANSMITTER THAT MAY BE OPERATING. THIS SPECIFICALLY
APPLIES TO FIBERS THAT ARE TO BE CONNECTED TO RECEIVERS OR OTHER
DEVICES AT ANY

LOOK INTO THE OUTPUT OF THE LASER TRANSMITTER
LOOK INTO THE OUTPUT OFA FIBER CONNECTED TO A LASER

LOOK INTO OR USE ANY OPTICAL INSTRUMENT TO VIEW THE DISTANT

DISTANCE FROM THE LASER TRANSMITTER.

HIGH VOLTAGE

The inside of the OTOT-87XX contains no user serviceable parts. There is exposed high voltage
inside this unit. Only factory service technicians should open the unit with power applied.

FIRE HAZARD

The AC line input fuse is contained in the IEC 320 power input connector. This fuse is a 250V,

0.5A, 5x20mm, slow blow fuse. To avoid a risk of fire, this fuse should be replaced only with an
identically rated fuse.

SHOCK HAZARD

The OTOT-87XX is designed for indoor use only. Direct exposure to moisture must be avoided .

025-000538 REV 1 4/06/09 Page 3

INTRODUCTION

The Olson Technology OTLT-87XX-40-SA is a very cost effective indoor wideband laser transmitter
with an RF passband of 10 to 4,000MHztypical, 10-3,600MHz guaranteed. These transmitters are

intended for indoor applications. They combine the transmitter and universal AC power supply in
one compact housing that has a footprint of 7.5" x 5.5" x 1.6". The optical output power of each
transmitter is 10dBm. Each transmitter has a universal power supply and will operate from 90
to 240V and consumes about 10 Watts.

at 50 or 60 Hz

AC

The OTLT-87XX-40-SA is an ideal for putting satellite signals on to fiber. Test points are provided
for laser output power and current to allow for historical review of operating parameters. Positive
cooling is provided by means of a small, high-MTBF fan, which may be replaced in the field
without interrupting the operation of the unit. The OTOT-87XX has flanges on the bottom to
allow mounting it to a flat surface. The available OTLL-RMKIT-1 will allow mounting up to
three of these units in a standard 19" rack.

INSTALLATION / ENVIRONMENTAL CONSIDERATIONS

The OTOT-87XX transmitter is specified to operate from -10°C to +55°C. They usually do not

require an air-conditioned environment. They should be mounted in an adequately ventilated
area. Like all electronic equipment, it will generally have a longer life span if it is not operated at
the upper limit of the temperature range. Installation in wet areas or areas of extremely high
humidity should be avoided. Extremely dirty or dusty areas should be avoided if possible.
Objects or debris should not be allowed to block the openings in the housing or the fan. The unit
should not be installed in areas that are accessible to children.

The OTOT-87XX may be installed and operated in any position on a flat surface. The unit has
four slots in the bottom plate to accommodate mounting hardware. If mounting requires a wood
screw, use #6 or #8 (maximum) pan-head sheet metal screws. These are commonly available at
hardware stores. If mounting with a machine screw (to tapped holes), use 6-32 pan-head screws.

025-000538 REV 1 4/06/09 Page 4

FIGURE1-OTOT-87XX MOUNTING DIAGRAM

OPTICAL CONNECTORS AND CLEANING

The standard optical connector is an SC/APC. In order to use FC/APC connectors, you must

order a conversion kit, OTLL-SCFCKIT. The standard optical connector location is on the
opposite side from the RF connector.The connector can be moved to the other side by swapping
it with a cover plate. Only a screwdriver is required for this operation.

The fiber ends can be damaged by the insertion of contaminated connectors. Some types of
customer damage to connectors are not covered under warranty. Fiber connectors should never
be left uncovered. Prepackaged alcohol wipes are the most convenient means of cleaning optical
connectors. Clean alcohol and lint free wipes or swabs may also be used.

INTERNAL CONTROLS

There are no internal user adjustments. The only reason to open the unit would be to move the

fiber connector to the other end of the unit. This should be done before the unit is attached to a
rack mount kit. The unit should not be operated for long periods of time without a top cover.

025-000538 REV 1 4/06/09 Page 5

This can cause RF radiation and ingress problems. The internal cooling is also reduced when
uncovered.

Be sure to replace and tighten all top cover screws. Oscillation or RF radiation can be caused by
loose or missing screws. There is no user adjustable internal laser power adjustment. Any change
to the laser power will result in poorer modulation characteristics and reduced link performance.

EXTERNAL CONTROLS AND TEST POINTS

There are two external DC test points. One reads laser current at 1V per 50mA. A typical laser
current of 30mA would read 0.6V at this test point. The laser power test point is 0.1V per mW.
This is for historical tracking. The optical power meter is a much more accurate means of
measuring power. Both of these test points should be measured with a high impedance voltmeter.

INITIAL SETUP

Mount the unit and apply power. The laser is temperature controlled. The unit will operate

immediately after turn on, but requires about 5 minutes to temperature stabilize. Measure and
record the optical output with a power meter. Measure and record the laser current and optical
power readings at the external test points.

ACCESSORIES

SC/APC to FC/APC Optical Connector AdapterOTLL-SCFCKIT
Rack Mount Kit (Holds 3 OTLT-87XX)OTLL-RMKIT-1
Optical AttenuatorsOTOA-XXXX
Replacement Fan AssemblyOTLL-FANKIT

DESCRIPTIONMODEL

025-000538 REV 1 4/06/09 Page 6