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®
STARLINE
SG2-DRT-3X
Installation Sheet 494828-001
This Installation Sheet describes the procedure for installing the SG2-DRT-3X in the SG2440 or
SG2000 node.
®
The Motorola Digital Return Transmitter (SG2-DRT-3X) converts three independent 5 to
42 MHz analog RF return-path signals into one digital optical signal within the SG2000 and
SG2440 nodes. This digital optical signal, with 10-bit resolution and 3.1 Gbps rate, is suitable
for optical transmission to the GX2-DRR-3X Digital Re
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2 STARLINE Figure 1 illustrates a block diagram of the SG2-DRT-3X: Figure 1 SG2-DRT-3X block diagram LF pilot Filter and Frame generator clock driver synchronization 5-42 MHz 42 MHz A/D LPF converter Pin Gain attenuator block Laser ITU laser driver RF detector LF pilot generator 5-42 MHz 32:1 42 MHz A/D 3.1 GHz multi- LPF converter xoscillator plexer Pin Gain attenuator block RF detector LF pilot generator Microprocessor 5-42 MHz 42 MHz A/D LPF converter Pin Gain attenuator block ADC in DAC
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STARLINE 3 Table 1 provides information on the user-related features of the SG2-DRT-3X: Key Feature Description 1 OPTICAL This test point enables monitoring of the optical output level of the module. POWER The nominal scale factor is 1.0 V/mW (6.3 V equates to 8 dBm). The optical (1 V/mW) power test point does not track changes in optical power due to the laser tracking error. 2 F A red (FAULT) LED indicates that the laser output power is below normal A U limits. L O A green LED (ON
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4 STARLINE Figure 3 illustrates a block diagram of the SG2440-DR-3X return configuration: Figure 3 SG2440-DR-3X return configuration E-PACK PLUG-IN LID XMTR BOARD INPUT RP1 TX C D sub location RP3 RP2 3.5 dB DRT DRT1 1 A (MCX) RP4 3.5 dB DRT DRT2 2 B (MCX) Figure 4 illustrates the SG2440-DR-3X return board: Figure 4 SG2440-DR-3X return board T1 R5 R6 R1 R2 R3 R4 J9 SG2-DRT-3X Installation Sheet
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STARLINE 5 To install the SG2-DRT-3X in the SG2440 node: 1 If present, remove any analog transmitter that occupies the optical XMTR B or A positions, as illustrated in Figure 5, and then install the double-wide SG2-DRT-3X: Figure 5 SG2440 lid TP XMTR B TP XMTR A Pad XMTR B Pad XMTR A TP DRT1 Return configuration Pad DRT1 location TP DRT2 Pad DRT2 Optical XMTR B RP1 RP3 Optical XMTR A RP2 RP4 DRT1 DRT2 2 Replace the XMTR B 15 dB pad with a 5 dB pad. 3 Install the SG2-DRT-3X board in t
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6 STARLINE TP XMTR A and Pad XMTR A are not used, therefore, it is not necessary to pad the XMTR A location as no signal is present. 8 Close the housing and use a torque wrench to progressively tighten the housing bolts to a final torque of 12 ft-lbs. in the sequence stamped on the housing lid. Figure 6 illustrates a properly installed and cabled SG2-DRT-3X: Figure 6 SG2-DRT-3X installed in SG2440 SG2-DRT-3X Installation Sheet
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STARLINE 7 Installing the SG2-DRT-3X in the SG2440 Node in a 1X or 2X Configuration The SG2-DRT-3X transmitter can operate with three data streams. If you install the SG2-DRT-3X in an SG2440 that will remain a combined (1X) or split (2X) return, an additional cable is provided to properly load the transmitter. To properly cable the SG2-DRT-3X for a combined or split return: 1 Verify that the SG2440 return configuration plug-in board is either a redundant (1X) or a split (2X) model. 2 I
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8 STARLINE To use the SG2-DRT-3X, the SG2000 must be equipped with the ICS plug-in board. The circuitry on this assembly contains 9 dB of attenuation to ensure proper levels into the transmitter input. Figure 8 illustrates the ICS board: Figure 8 SG2 ICS board J1 SG2-DRT-3X Installation Sheet
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STARLINE 9 To install the SG2-DRT-3X in the SG2000 node: 1 If present, remove any analog transmitter that occupies the optical transmitter B or A positions as illustrated in Figure 9, and then install the double-wide SG2-DRT-3X: Figure 9 SG2000 optical transmitter B and A locations Pad - optical transmitter B Test point - optical transmitter B Pad - optical transmitter A JP1 Test point - optical transmitter A Optical transmitter B Optical Power transmitter A supply 2 Optical receiver C
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10 STARLINE Figure 10 illustrates the SG2000 equipped with an SG2-RPM/C, the E-pack cover removed, the ICS locations, proper cable routing and installed SG2-DRT-3X: Figure 10 SG2-DRT-3X installed in SG2000 ICS connections 5 Install an SG2-DR-3X input board in each selected ICS location. The ICS locations on the left are for ports 1 and 3 and the locations on the right are for ports 2 and 4. 6 Nest the attached cables between the components on the E-pack and toward the PIC cable and s
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STARLINE 11 8 Continue to route the two cables alongside the PIC and under the fiber tray in the SG2000 lid as illustrated in Figure 10. 9 Attach DR MCX 1 connector to RF INPUT A and DR MCX 2 connector to RF INPUT B on top of the SG2-DRT-3X (Figure 10). 10 Use tie straps to loosely secure the two cables to the PIC cable as an assist in cable management. 11 Confirm that the green LED (ON), located on the top panel of the SG2-DRT-3X is illuminated to confirm enable status. A delay of app
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12 STARLINE Specifications Specifications are valid over the given bandpass and operating temperature range of −40°F to +140°F (−40°C to +60°C). Specifications are stated typical unless otherwise noted, and are subject to change. Refer to the Motorola BCS Web site or contact your account representative for the latest specifications. Parameter Specification Wavelengths See following table RF bandwidth 5 MHz to 42 MHz Number of input channels 3 Input level 15 dBmV total power per channel
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STARLINE 13 SG2-DRT-3X CWDM Models Model Description SG2-DRT-3X-1310 3X TDM CWDM TX, 1310 nm, DFB, SC/APC SG2-DRT-3X-1470c 3X TDM CWDM TX, 1470 nm, DFB, SC/APC SG2-DRT-3X-1490c 3X TDM CWDM TX, 1490 nm, DFB, SC/APC SG2-DRT-3X-1510c 3X TDM CWDM TX, 1510 nm, DFB, SC/APC SG2-DRT-3X-1530c 3X TDM CWDM TX, 1530 nm, DFB, SC/APC SG2-DRT-3X-1550c 3X TDM CWDM TX, 1550 nm, DFB, SC/APC SG2-DRT-3X-1570c 3X TDM CWDM TX, 1570 nm, DFB, SC/APC SG2-DRT-3X-1590c 3X TDM CWDM TX, 1590 nm, DFB, SC/APC SG2
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This is a class 1 product that contains a class IIIb laser and is intended for operation in a closed environment DANGER with fiber attached. Do not look into the optical connector of the transmitter with power applied. Laser output is INVISIBLE LASER RADIATION invisible, and eye damage can result. Do not defeat safety features that prevent looking into optical connector. AVOID DIRECT EXPOSURE TO BEAM PEAK POWER 5.0mW WAVELENGTH 1300nm CLASS IIIb LASER PRODUCT THIS PRODUCT COMPLIES WITH 21CF
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FCC Declaration of Conformity According to 47 CFR, Parts 2 and 15 for Class B Personal Computers and Peripherals; and/or CPU Boards and Power Supplies used with Class B Personal Computers, Motorola, Inc., 6450 Sequence Drive, San Diego, CA 92121, 1-800-225-9446 or 101 Tournament Drive, Horsham, PA 19044, 1-800-xxx-xxxx, declares under sole responsibility that the product identifies with 47 CFR Part 2 and 15 of the FCC Rules as a Class B digital device. Each product marketed is identical to
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MOTOROLA, the Stylized M Logo and STARLINE are registered in the US Patent & Trademark Office. All other product or service names are the property of their respective owners. Motorola, Inc. 2003. All rights reserved. 494828-001 5/03 No part of the contents of this manual may be reproduced or transmitted in any form or by any means without the written permission of the publisher. MGBI
