24926 Highway 108
Sierra Village, CA 95346
Phone: (800) 545-1022
Fax: (209) 586-1026
E-Mail: sales @olsontech.com
External Modulation 1550nm CATV Optical Transmitter
High-Performance Model OTOT-EM55XL
Features and Benefits
High performance externally
modulated 1550nm DFB laser
CATV transmitter.
Low noise, narrow linewidth CW-
DFB laser. DWDM ITU grid wave-
length is adjustable to ± 100GHz
via front panel.
Adjustable SBS threshold from
+13dBm to +19dBm on 0.1dB
steps increases system flexibility.
Dual, hot plug-in power supplies
available for high reliability; 100 to
240V
AC
or ± 36 to ±72 V
DC
.
LCD display, LED status indication,
and front panel -20dB front panel
RF test point aide in set-up and
operation.
Electro-optical modulator offers
dual +6dBm optical outputs.
Automatic RF gain control: CW,
video, and manual modes.
Sophisticated web and SNMP
interface control and monitoring.
General purpose I/O interface for
remote functions.
Housed in a 1RU 19" rack-mount
enclosure for use in standard
equipment racks.
SC/APC optical connector stan-
dard. FC/APC optional.
The high performance Olson Model OTOT-EM55XL
1550nm Externally Modulated CATV Optical Transmitter
uses a low-noise, narrow bandwidth, CW laser as a light
source. The external modulator amplitude modulates the
light, allowing the transmitter to eliminate the chirp
associated with 1550nm direct modulation lasers. It is
deal for CATV supertrunk links (100km & more) and
multipoint distribution networks. The OTOT-EM55XL
provides state-of-the-art bandwidth from 47MHz to
1,000MHz. It also offers superb stability over the full
operating temperature range from 0°C to +50°C.
Direct modulation 1550nm CATV transmitters suffer from
the effects of dispersion that can occur even in modest
length fiber runs (10-20km). The key degradation is CSO
caused by the laser chirp. In networks using an EDFA, the
output fiber optical launch power must also be closely
regulated to avoid performance degradation of due to
SBS. Olson’s Externally Modulated CATV transmitter can
compensate for these types of distortion, allowing for
high quality signal transmission of multiple CATV chan-
nels for distances up to 100km or more.
The widely adjustable SBS value on the XL version further
increases the transmitter's flexibility, allowing the net-
work to be optimized for a wide range of fiber lengths. The
unique ability of the OTOT-EM55XL to tune to several
different DWDM channels simplifies logistics by alloing
one spare to cover multiple installed units.
The transmitter is enclosed in a 19" wide, 1RU rack
chassis for using in a standard EIA 19" rack. Front panel
controls and a LCD display allow the user to quickly
monitor and control system parameters. Optical connec-
tors are SC/APC standard, with an option for FC/APC
connectors. Single or Dual AC and DC power supply
options are available.
www.olsontech.com
Rev X2
All Specifications Subject to Change Without Notice
Dec. 2007
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