User Manual

ADCP-75-116 • Issue A • August 2001 • Section 2: Description
Page 2-12
© 2001, ADC Telecommunications, Inc.
4 SPECTRUM TRANSPORT MODULE
The Spectrum Transport Module (STM), shown in Figure 2-5, serves as the handset servicing
device for the Digivance LRCS. The STM provides the following basic functions:
• Provides an RF interface to the handsets via the LPA and an external antenna.
• Provides an optical interface to the HU.
•Converts the digitized forward path optical signal to a digitized RF signal.
•Converts the digitized RF signal to a composite RF signal.
• Digitizes the reverse path composite RF signal.
•Converts the digitized reverse path RF signal to a digitized optical signal.
• Provides an RS-232 interface for a local management system.
• Transports alarm, control, and monitoring information via the optical link.
Figure 2-5. Spectrum Transport Module
16802-A