STARLINE®

SG4-DRT-2X

Installation Sheet 509978-001

The Motorola® Digital Return Transmitter (SG4-DRT-2X) implements Time Division Multiplexing (TDM) to convert two, independent 5 to 65 MHz analog RF return-path signals, into one digital optical signal within SG4000 optical nodes. This digital optical signal with 10-bit resolution and 3.125 Gbps rate is suitable for optical transmission on the International Telecommunications Union (ITU) grid to the GX2-DRR-2X Digital Return Receiver (DRR) where the original analog return-path signals are recreated.

The transmitter is configured with an 8 dBm digital Distributed Feedback (DFBT) laser that is thermally stabilized to minimize wavelength drift. Multiple ITU wavelengths are available depending on specific link requirements. The specific ITU channel and frequency are stamped on the label on each transmitter and are identified in the subsection SG4-DRT-2X Models at the end of this document.

The SG4-DRT-2X transmitter features high-speed digital technology to achieve reliable return path communications at greater distances. The system is completely scalable and can be expanded from a single transmitter/receiver to groups of 4, 8, 16, 32, or 40 wavelengths over a single fiber with the use of muxing and demuxing equipment. The system is compatible with Motorola low-noise optical amplifiers (EDFAs), enabling network designs that cover large geographical areas. Without amplification, the SG4-DRT-2X Dense Wave Division Multiplexing (DWDM) digital return system is capable of achieving a link loss budget of 26 dB.

The system achieves superior noise power ratio (NPR) and dynamic range (DR) performance in return path communications. The SG4-DRT-2X system is HMS compliant and features an enable/fault LED to report local status information. The SG4-DRT-2X comes standard with SC/APC optical connectors; E2000 adapters are optional.

To facilitate easy upgrades, the double-wide SG4-DRT-2X module has the same set-up levels as the analog return transmitters and can accomplish any two-transmitter configuration using only a single fiber.

Figure 1 illustrates a block diagram of the SG4-DRT-2X:

Figure 1

SG4-DRT-2X block diagram

Return

 

 

 

 

 

 

 

 

 

 

 

 

TXF

 

 

 

 

 

 

 

Laser

 

Optical

Channel

 

JXP

 

Coupler

 

EQ

 

 

 

Fiber

 

 

A/D

 

 

 

 

 

Test Point

 

Output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input B

 

 

 

 

 

 

 

 

 

 

 

 

MR

 

 

 

 

 

 

 

 

 

 

 

 

-3 Gbps

5-65 MHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transmit

 

 

 

Laser

 

 

 

 

 

Input B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal

 

Mux

 

 

 

Laser

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-20 dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Processing

 

 

 

driver

 

 

 

Return

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TEC

 

 

Channel

 

JXP

 

Coupler

 

EQ

 

 

 

Fiber

 

TXF

 

A/D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input B

 

 

 

 

 

 

 

MR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5-65 MHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-20 dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SG4-DRT-2X Installation Sheet

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Page 1
Image 1
Motorola manual SG4-DRT-2X block diagram, SG4-DRT-2X Installation Sheet
Page 2

SG4-DRT-2X specifications

The Motorola SG4-DRT-2X is a robust communication device that stands out for its versatility in various industrial and commercial applications. Designed primarily for mission-critical environments, this device incorporates cutting-edge technologies to enhance operation efficiency and user experience.

A key feature of the SG4-DRT-2X is its superior audio performance. It utilizes advanced noise-cancellation technologies that ensure crystal-clear communication even in the loudest environments. This is essential for industries like construction, manufacturing, and emergency services, where clear communication can be a matter of safety. The device also supports wideband audio, which enables higher audio quality for better voice clarity.

Another prominent characteristic is its rugged design, making it suitable for harsh conditions. The SG4-DRT-2X complies with military standards, offering water and dust resistance. It can withstand drops and impacts, providing reliable performance in challenging settings. The ergonomic housing ensures comfort during prolonged usage, which is an important consideration for professionals in the field.

Connectivity is another area where the Motorola SG4-DRT-2X excels. It integrates seamlessly with existing communication systems while supporting multiple channels for group communication. This is facilitated by advanced digital technologies that allow for secure and encrypted transmissions, ensuring that critical information remains confidential and protected against eavesdropping.

The device is also equipped with a long-lasting battery that supports extended use without the need for frequent recharging. Its smart power management system optimizes energy consumption, allowing users to focus on their tasks without the constant worry of running out of power.

Moreover, the SG4-DRT-2X features a customizable interface, enabling users to tailor settings according to their specific needs. The intuitive controls make it user-friendly, allowing even those with minimal technical knowledge to operate the device effectively.

In summary, the Motorola SG4-DRT-2X is a high-performance communication device characterized by its superior audio quality, rugged design, robust connectivity, and user-centric features. It is engineered to support professionals across various sectors, enhancing both communication and productivity. As industries continue to evolve, devices like the SG4-DRT-2X will play an integral role in ensuring efficient and secure communication in demanding environments.
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