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Installation Sheet
STARLINE
®
SG2-DRT-3X
Installation Sheet 522120-001
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 Return Receiver (DRR) where the original
analog return-path signals are recreated.
The transmitter is factory-configured with either a dense wave division multiplexing (DWDM)
laser on the International Telecommunications Union (ITU) grid or a coarse wave division
multiplexing (CWDM) laser that is applicable to the required link. Motorola provides standard
models that are identified in the subsection SG2-DRT-3X Models at the end of this document.
The specific wavelengths are stamped on the label of each transmitter.
An automatic power control (APC) system regulates the optical output power from the laser.
The unit provides automatic gain control (AGC) and requires no adjustment. The SG2-DRT-3X
features alarm LEDs to report local status information.
To facilitate easy upgrades, the SG2-DRT-3X has the same set-up levels as the analog return
transmitters. The double-wide module occupies the same locations as the two analog
transmitters in the node lid. The SG2-DRT-3X generates its own 5 V power and works with a
single SG2-PS2 or SG2-PS power supply.
Related Documentation
In addition to this Installation Sheet, the SG2440 Telecommunications Optical Node
Installation and Operation Manual and the SG2000 Telecommunications Optical Node
Installation and Operation Manual are required to install the SG2-DRT-3X. If you do not have
these documents, you can obtain them from the Motorola Web site.
Document Conventions
Before you begin using this Installation Sheet, familiarize yourself with the stylistic conventions
used in this document:
Denotes silk-screening on the equipment, typically representing input/output (I/O) and power
SMALL CAPS
supply connections
*
Indicates that several versions of the same model number exist and the information applies to all
(asterisk)
models; when the information applies to a specific model, the complete model number is given
Before You Begin
Before you install the SG2-DRT-3X, verify that you have received the SG2-DRT-3X-CH*Kit,
part number 498284-*.
SG2-DRT-3X Installation Sheet
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Table of Contents
Related Manuals for Motorola SG2-DRT-3X
Summary of Contents for Motorola SG2-DRT-3X
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Page 1: Related Documentation
To facilitate easy upgrades, the SG2-DRT-3X has the same set-up levels as the analog return transmitters. The double-wide module occupies the same locations as the two analog transmitters in the node lid. The SG2-DRT-3X generates its own 5 V power and works with a single SG2-PS2 or SG2-PS power supply. - Page 2 STARLINE Figure 1 illustrates a block diagram of the SG2-DRT-3X. Figure 1 SG2-DRT-3X block diagram LF pilot generator 5-42 MHz 42 MHz Gain attenuator block LF pilot generator 5-42 MHz 42 MHz Gain attenuator block LF pilot generator 5-42 MHz...
- Page 3 D-type connector on the bottom of the SG2-DRT-3X. This SC/APC-type connector provides optical output from the SG2-DRT-3X. Figure 3 illustrates a side view of the SG2-DRT-3X and indicates the laser warning label. Figure 3 SG2-DRT-3X side view and laser warning label...
- Page 4 The SG2440 carries each RF return path individually to the lid board and no adjustments to the electronics package (E-pack) are necessary. Before you install the SG2-DRT-3X in the SG2440, you must configure the node with the SG2440 DR-3X board. In this configuration, the RF return signals from RP1 and RP3 are combined and placed onto the D-subconnector beneath the double-wide transmitter module.
- Page 5 A delay of approximately 10 seconds before illumination is normal. Review return-path system levels: Each input of the SG2-DRT-3X is configured to drive the laser to the recommended level of +15 dBmV. Use TP DRT1 and TP DRT2 (Figure 5) to monitor the levels of the segmented ports. Pad DRT1 and pad DRT2 are used to adjust the level into the transmitter.
- Page 6 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 7 illustrates a properly installed and cabled SG2-DRT-3X. Figure 7...
- Page 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.
- Page 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 9 illustrates the ICS board. Figure 9...
- Page 9 To install the SG2-DRT-3X in the SG2000 node: If present, remove any analog transmitter that occupies the optical transmitter B or A positions as illustrated in Figure 10, and then install the double-wide SG2-DRT-3X. Figure 10 SG2000 optical transmitter B and A locations...
- Page 10 STARLINE Figure 11 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 11 SG2-DRT-3X installed in SG2000 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.
- Page 11 A delay of approximately 10 seconds before illumination is normal. Review return-path system levels: Each input of the SG2-DRT-3X is configured to drive the laser to the recommended level of +15 dBmV. If available, use a test adapter cable to measure levels directly at the SG2 ICS board assembly.
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Page 12: Specifications
Specifications are valid over the given bandpass and operating temperature range of −40°F to +140°F (−40°C to +60°C). Specifications stated are 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. -
Page 13: If You Need Help
Outside the U.S.: 215-323-0044 Motorola Online: http://businessonline.motorola.com The TRC is on call 24 hours a day, 7 days a week. In addition, Motorola Online offers a searchable solutions database, technical documentation, and low-priority issue creation and tracking. Technical Response Center... -
Page 14: Canadian Compliance
These servicing instructions are for use by qualified personnel only. To reduce the risk of electrical shock, do not perform any servicing other than that contained in the Installation and Troubleshooting Instructions unless you are qualified to do so. Refer all servicing to qualified service personnel. -
Page 15: Class I Laser Product
89/336/EEC CLASS I LASER PRODUCT 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. 2005. All rights reserved.