Toner Cable OTOT-EM55X Low-Cost External Modulation 1550nm CATV Optical Transmitter User Manual
Otot-em55x
OTOT-EM55X
Low-Cost External Modulation 1550nm CATV Optical Transmitter
969 Horsham Road
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Horsham, Pennsylvania 19044 USA
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Phone: 215-675-2053 Fax: 215-675-7543
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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, allow-
ing 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 dis-
persion 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 channels 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 non-
linearity.
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 connectors
are SC/APC standard, with an option for FC/APC connectors. Single AC
and DC power supply options are available.
Low-Cost externally modulat-
ed 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 ±72V
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.
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General purpose I/O interface for
remote functions.
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Housed in a 1RU 19" rack-mount
enclosure for use in standard equip-
ment racks.
•
SC/APC optical connector standard.
FC/APC optional.
Ordering Information
OTOT-EM55
X
Freq. Plan
Opt. Conn.
RF Conn.
Power Supply
Frequency Plans
Optical Connector
RF Connector Location
Power Supply
N = NTSC 77 Chan SA = SC/APC
F = On Front Side
AC = 1x (100 to 240V )AC
P = PAL 84 Chan
FA = FC/APC
R = On Rear Side
DC = 1x (±36 to ±72 V )DC