Toner Cable OTOT-EM55X User Manual

OTOT-EM55X

Low-Cost External Modulation 1550nm CATV Optical Transmitter

969 Horsham Road lHorsham, Pennsylvania 19044 USA l Phone: [phone] Fax: [phone] [e-mail]

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 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 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 connectors
are SC/APC standard, with an option for FC/APC connectors. Single AC
and DC power supply options are available.

Low-Cost externally modulat­ed 1550nm DFB laser CATV
transmitter.

• Low noise, narrow linewidth CW­DFB laser.

• Fixed SBS threshold of +16.5dBm

• Power supply available for 100 to
240V

AC

or ±36 to ±72VDC.

• 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 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

Specifications Subject To Change Without Notice Rev 06-11 ©Toner Cable Equipment, Inc.

969 Horsham Road lHorsham, Pennsylvania 19044 USA l Phone: [phone] Fax: [phone] [e-mail]

Min Typ Max Units

Laser Wavelength 1545 1550 1555 nm
Optical Connector SC/APC

FC/APC
Side Mode Suppression >30 dB
Relative Intensity Noise <-158 <-160 dBc/Hz
Nom. Input Level per Tx Ch. 20 dBmV
RF Monitor Output Level -20 dB

(+0.2 to -0.8dB @ 862MHz;

-1.3dB @ 1GHz
AGC Dynamic Range -6 +3 dB
Impedance (F-female) 75 Ohm
Return Loss

(47 MHz, -1.5dB/oct.) >15 >20 dB

Control Interface RS485/232

Specifications

OTOT-EM55X

Low-Cost External Modulation 1550nm CATV Optical Transmitter

Min Typ Max Units

Weight 21.4 lbs

9.7 kg

Dimensions(WxHxD) 19 x 11 x 1.75 in

482.6x 279.4 x 44.5 mm

Min Typ Max Units

Power Supply Voltage 100 240 V

AC

Power Supply Frequency ±36 ±72 V

DC

Power Consumption (110VAC) <50 W

Power Consumption (48VDC) <50 W

Operating Temp. Range 0 +50 °C
Storage Temp. Range -20 +85 °C
Humidity 20 85 %

General Characteristics (with SM 9/125μm Fiber)

Physical Characteristics

Electrical and Environmental Characteristics

EMI meets EN50083-2 (April 1996) and EN50083-2A1 (February 1998)

Min Typ Max Units

Laser Wavelength 1545 1550 1555 nm
Laser Linewidth 0.65 MHz
Optical Output Power (dual) +5.0 +6.0 +7.0 dBm
SBS Suppression (fixed) 16.5 dBm
RF Frequency Range 47 862 MHz
Flatness <±0.75 dB
Version PAL84
Channel Plan PAL-D
Number of Channels
TV/FM (-4dB)/QAM64 (-10dB) 84/0/0
Noise Bandwidth 5 MHz
CNR Tx/Rx 52.5 dB
CNR Link 1 51.5 dB
CNR Link 2 49.0 dB
CNR Link 3 46.5 dB
CSO Tx/Rx and Link 1 65 dBc
CSO Link 2 65 dBc
CSO Link 3 at output #1 63 dBc
CTB 65 dBc

Optical and RF Performance
(with SM 89-125μm Fiber)

Test Configurations

Booster EDFA First Fiber Length In-Line EDFA Second Fiber Length Rx

Tx/Rx No No No No 0dBm
Link 1 No 35km No No 0dBm
Link 2 16dBm 65km No No 0dBm
Link 3 13dBm 52km 13dBm 52km 0dBm