Table of Contents Amplifiers Broadband Telecommunications Line Extender [BLE-75**] FEATURES 750 MHz Power Doubling Technology 60/90 V Powering Surge Tolerant 29 db Operational Gain Bode Equalization (thermal or auto controlled) Backwards Compatibility 10 Ampere AC Bypass Capability -20 db Test Points LIFELINE TM Status Monitor Upgradable file:////ncs-server-xp/temp/motorola CD 2001/frames.htm (1 of 7) [7/21/2008 10:05:43 AM]
Recognizing that today's newer systems must embody a flexible platform for tomorrow's interactive services, General Instrument has developed the BTA (Broadband Telecommunications Architecture) that allows advanced services to be added in an incremental fashion as required. In support of the BTA architecture, we introduce the BLE-75** Broadband Line Extender. The BLE-75** is a 750 MHz line extender that offers high operational gain, Bode equalization (thermal or autocontrolled), and power doubling technology. The BLE-75** fulfills the demands of modern cable networks and includes numerous features that are required in present and future distribution systems. The BLE-75** is capable of 60 or 90 Vac powering. The unit is shipped with the internal power supply configured for 60 Volt powering. The location of a jumper in the power supply can be changed to configure the unit for 90 volt operation. The BLE-75** electronics package is backwards compatible with the STARLINE JLX-HSG line extender housing. The BLE series replaces the STARLINE JLX 750 MHz series and offers the following technical features. The operational gain of the BLE-75** has been improved to 29 db. The higher gain of the BLE-75** makes it a better fit for today's hybrid fiber-coax systems, as well as for conventional tree and branch designs. The forward amplifier has improved noise figures in operation across the entire bandpass. Output level control is achieved through the use of a Bode equalizer that is located interstage and may be controlled with a thermal drive unit (TDU) or with a single pilot closed loop automatic drive unit (ADU-***). Both the TDU and ADU boards are common to the BTA family of amplifiers. The BLE-75** is shipped with one-way operation capability with provisions for two-way operation including diplex filters for the input and the output of the amplifier. If the BLE is activated for two-way operation, the return amplifier should be installed. The low end response of the return spectrum also has been improved. A unique feature of the BLE-75** is its patented surge suppression system for the return spectrum. The high efficiency switching power supply of the BLE-75** is equipped standard with a heavy-duty gas discharge tube surge arrestor. The standard surge suppresser also can be replaced with the FTEC/BTA electronic crow bar type surge suppresser for longer life overvoltage protection. The BLE-75** is in compliance with IEEE C62.41-1991 specifications for overvoltage testing as recommended by CableLabs. The line extender is provided from the factory with a 15 Ampere fuse for AC bypass. The optional LCB-5 (5 Ampere) circuit breaker is also available for this purpose. Other features include -20 db directional coupler test points available at the input and the output of the amplifier. The BLE-75** is enclosed in the BLE-HSG which allows access to output test points without opening the housing. The BLE-75** provides an AC power jumper that can be removed to block the flow of power from the input port to the output port. file:////ncs-server-xp/temp/motorola CD 2001/frames.htm (2 of 7) [7/21/2008 10:05:43 AM]
Ordering Information Quantity Model Number Description 1 BLE-75** Broadband Telecommunications Line Extender including basic station, forward electronic chassis, power supply, and housing Optional Accessories 1 EQ-750-** Forward, pre-stage equalizer, 750 MHz, ** specify cable equivalent equalization, 2-22 db, in 2 db steps. Consult system design for values. A/R JXP-*A Attenuation pads, available from 1 to 24 db in 1 db steps. 2 locations forward path. 2 locations return path. Consult system design for values. 1 optional ADU-* Automatic Drive Unit, single-channel, closedloop control circuit for ASC operation. 1 optional TDU Thermal Drive Unit, thermistor driven control circuit for thermally guided slope control. 1 optional RA-Kit/*L Return amplifier kit, contains RF hybrid, jumpers, and equalizer. 1 optional FTEC/BTA Electronic crowbar circuit, plug-in, for lightning strikes. BLE-75** is shipped with high current surge arrestor that fires at 230 Volts. 1 optional LCB-5 5 Ampere thermal circuit breaker for AC bypass. BLE-75** is shipped standard with a 10 Ampere automotive fuse. 1 optional BCS-75* Cable simulators, 750 MHz (values 1 to 10 db) Model BLE-75** Line Extender file:////ncs-server-xp/temp/motorola CD 2001/frames.htm (3 of 7) [7/21/2008 10:05:43 AM]
Specifications Amplifiers Broadband Telecommunications Line Extender[BLE-75**] BLE-75SH Optional RA- KIT/*L Installed PARAMETER UNITS NOTE FORWARD RETURN Passband SH MHz 1 52-750 5-40 JH MHz 1 70-750 5-55 Flatness db 2 ± 0.75 ± 0.75 Minimum Full Gain Operational Gain db 3 33 Minimum 21 db 4 29 Minimum 21 file:////ncs-server-xp/temp/motorola CD 2001/frames.htm (4 of 7) [7/21/2008 10:05:43 AM]
Manual Bode Slope Control Range Interstage Equalizer: db 5 ±4 N/A Slope db 6 7 N/A Cable Equivalent db 10 N/A Noise Figure: 40 MHz db 7 N/A 6 Reference Frequency 50 MHz db 7 N/A 750 MHz db 9 N/A MHz 8 745.25/55.25 750/547.25/55.25 Output Level dbmv 47/37 37/44/37 Channel loading 110 NTSC 77 NTSC with 200 MHz compressed data Slope Chart S1 S2 Distortion CTB dbc 9 57 69 N/A XM dbc 10 59 66 N/A CSO dbc 9, 11 59 68 N/A CIN dbc 12 N/A 71 N/A STB dbc 9 N/A N/A N/A SSO dbc 9 N/A N/A N/A Test Point (all) db 13 20 ±1.25 20 ±1.25 20 ±1.25 Return Loss db 14 14 14 14 Hum Modulation DC Current @ Output Voltage dbc 15 60 60 60 Vdc 16 24 ±0.25 24 ±0.25 24 ±0.25 Current DC ma 17 700 700 125 DC Ripple mv 15 P-P 15 P-P 15 P-P Power Consumption AC Input Voltage Range AC Current Draw: W 22.6 22.6 3.8 Vac 38-60/55-90 38-60/55-90 38-60/55-90 @ 90 Vac A 0.45 0.45 0.52 file:////ncs-server-xp/temp/motorola CD 2001/frames.htm (5 of 7) [7/21/2008 10:05:43 AM]
AC Bypass Current Housing = BLE-HSG Dimensions Weight Ambient Operating Temperature @ 75 Vac A 0.49 0.49 0.57 @ 60 Vac A 0.56 0.56 0.64 @ 52 Vac A 0.59 0.59 0.71 @ 45 Vac A 0.66 0.66 0.75 @ 38 Vac A 0.73 0.73 0.84 A 18 10 10 10 L = 10.5" x W = 8.0" x H = 4.0" (26.57 cm x 20.24 cm x 10.12 cm) 7.2 lbs. (3.26 kgs) -40 C to +60 C 1. Operating passband of station. Diplex filters are hard-wired into the electronic chassis. 2. Peak-to-valley measurement for stated passband. Highest to lowest point on response curve. 3. Minimum full gain at 750 MHz, includes loss of equalizer but Bode slope reserves have not been set. Return gain includes loss of SEE-40-7 return equalizer. 4. Operational gain includes loss of slope reserves as well as equalizer. 5. Amount of Bode slope control range from midpoint, (typical setting is -4 db at 750 MHz @ 21 C). This control should not be used for gain reduction. 6. Amount of slope created by interstage equalizer. Interstage equalizer is a plug-in. 7. Noise figure is specified at the cable entry facility of the housing and includes the loss of 1 db for the pre-stage equalizer. The 40 MHz return noise figure includes the station loss preceding the RF hybrid. 8. Frequencies that relate the picture carriers or passband edges to the specified output levels and tilts. Refer to charts S1 or S2 as required. 9. Measured with CW carriers and spectrum analyzer. References the worst case channel. Specifications are compliant with the test methods as stated in NCTA RECOMMENDED PRACTICES FOR MEASUREMENTS ON CABLE TELEVISION SYSTEMS. 10. Measured with wave analyzer and synchronous, 100% depth modulated channels. References the worst case channel. Specifications are compliant with the test methods as stated in NCTA RECOMMENDED PRACTICES FOR MEASUREMENTS ON CABLE TELEVISION SYSTEMS. 11. Composite Second Order (CSO) distortion refers only to those beat clusters that fall +0.75 MHz and +1.25 MHz above the subject picture carrier. CSO beat clusters that have a -0.75 MHz and -1.25 MHz relationship to the subject file:////ncs-server-xp/temp/motorola CD 2001/frames.htm (6 of 7) [7/21/2008 10:05:43 AM]
picture carrier are not included in this specification. 12. CIN (Carrier-to-Intermodulation Noise). Contributions of data compression to noise floor. Performance varies on a two-for-one basis with amplifier output level and should be calculated in a cascade using a 20 Log function, but CIN should be added to the high channel C/N calculation on a 10 Log basis. 13. Test points should be used with a GFAL adaptor. 14. Match measurement at the station input and output, cable-entry facilities, at the specified passbands. 15. Measured with the stated AC Bypass Current. 16. Measured at the power connector. 17. Current draw at +24.0 Vdc. 18. AC current is stated in RMS continuous. Specifications subject to change without notice. For more information: call 1-888-436-4678 file:////ncs-server-xp/temp/motorola CD 2001/frames.htm (7 of 7) [7/21/2008 10:05:43 AM]