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
Low-Cost Model OTOT-EM55X
Features and Benefits
Low-Cost externally modu-
lated 1550nm DFB laser CATV
transmitter.
Low noise, narrow linewidth CW-
DFB laser.
Fixed SBS threshold of +16.5dBm
Power supply available for 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.
RS485/232 status interface.
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 low-cost Olson Model OTOT-EM55X 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. Ideal for FTTx
networks (Up to 60km typical) and other multipoint
distribution networks. The OTOT-EM55X provides wide
bandwidth from 47MHz to 862MHz. 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 60km or more.
The OTOT-EM55X fixed SBS suppression allows up to
+16.5dBm of light to be launched into a fiber with none of
the deleterious effects of the SBS nonlinearity.
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 AC and DC power supply options are
available.
www.olsontech.com
Rev X2
All Specifications Subject to Change Without Notice
Dec. 2007
stm32/stm8
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