www.olsontech.com external modulation 1550nm catv optical transmitter high-performance model otot-em55xl 24926 highway 108 sierra village, ca 95346 phone: (800) 545-1022 fax: (209) 586-1026 e-mail: sales @olsontech.com features and benefits rev x2 all specifications subject to change without notice dec. 2007 lcd display, led status indication, and front panel -20db front panel rf test point aide in set-up and operation. dual, hot plug-in power supplies available for high reliability; 100 to 240v or 36 to 72 v . ac dc electro-optical modulator offers dual +6dbm optical outputs. high performance externally modulated 1550nm dfb laser catv transmitter. 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. adjustable sbs threshold from +13dbm to +19dbm on 0.1db steps increases system flexibility. low noise, narrow linewidth cw- dfb laser. dwdm itu grid wave- length is adjustable to 100ghz via front panel. 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 0c to +50c. 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.
system specifications min typ max units laser wavelength 1547 1560 nm (ch. 23-38) itu grid wavelength adjust (50 ghz steps) -100 +100 ghz laser linewidth 0.3 mhz optical output power (dual) +5.0 +6.0 +7.0 dbm sbs suppression (adj 0.1db steps) +13 +19 dbm rf frequency range 47 1000 mhz flatness (47-860mhz) <0.75 db flatness (860-1000mhz) <1.5 mhz number of channels tv/fm (-4db) /qam64 (-10db) 84/0/0 noise bandwidth 5 mhz cnr tx/rx 52.5 db cnr link 1 52.0 db cnr link 2 50.5 db cnrlink3 49 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 number of channels tv/fm (-4db) /qam64 (-10db) 77/0/0 noise bandwidth 4 mhz cnr tx/rx 53.5 db cnr link 1 53.0 db cnr link 2 52.0 db cnr link 3 50.0 db cso tx/rx and link 1 65 dbc cso link 2 65 dbc cso link 3 at output #1 65 dbc ctb 65 dbc version pal84 channel plan pal-d version n77 channel plan ntsc optical and rf performance (with sm 9/125m fiber) catv transmitter www.olsontech.com min typ max units weight 21.4 lbs. 9.7 kg dimensions(wxlxh) 19x11x1.75 in. 482.6 x 279.4 x 44.5 mm physical characteristics general characteristics (with sm 9/125m fiber) min typ max units laser wavelength 1540 1560 nm (ch. 22-46) itu grid 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 @ 862 mhz; -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 ethernet 10/100 mb/s rev x2 2 dec. 2007 min typ max units power supply voltage 100 240 v power supply voltage 36 72 v power consumption (110v ) <50 w power consumption (48v ) <50 operating temp. range 0 +50 c storage temp. range -20 +85 c humidity 20 85 % emi meets en50083-2 (april 1996) and en50083-2/a1 (february 1998). ac dc ac dc electrical and environmental characteristics
catv transmitter www.olsontech.com rev x2 3 dec. 2007 ordering information test configurations otot-em55 xl freq. plan (see below) opt. conn. (see below) rf conn. (see below) xx (itu ch.) power supp. (see below) frequency plans n = ntsc 77 chan p = pal 84 chan optical connector sa = sc/apc fa = fc/apc rf connector location f = on front side r = on rear side power supply ac/ac = 2x (100 to 240v ) dc/dc = 2x (36 to 72 v ) ac dc ac/dc = mixed 230 v /48 v ) ac dc tx/rx booster edfa first fiber length no no 16dbm 13dbm 13dbm 35km 65km 52km 52km no no no no no no no 0dbm 0dbm 0dbm 0dbm second fiber length rx in-line edfa link 1 link 2 link 3 itu channel std = 15505nm or two digit dwdm itu channel from channel 22 to 46 1) rx with 7pa/hz input noise current density 2) edfa?s with 5db noise figure 3) rf input level at 20dbm/channel notes:
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