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SIP379C
Signal Multiplexing Training Course

SCOPE OF THE STUDY
The Frequency Domain Multiplex Panel, also referred to as Frequency Division Multiplex, is used independently or with the Time Division Multiplex Panel to form a short Multiplexing Techniques course.  The panel includes the study of transmitters, receivers, and fiber optic interfacing.

FDM PANEL DESCRIPTION

The FDM Panel incorporates four separate frequency multiplexed channels.  These channels operate of 312.5, 375, 437.5, and 500 KHz subcarriers.  These subcarriers, in turn, can be frequency modulated with on-board sine, square wave, and triangular signals or from an external signal source.  The panel includes three different FM demodulators for training purposes: the discriminator, phase-locked loop detector, and quadrature detector.  One channel simulates a technique used in telephony in which a pilot tone, derived from a stable crystal oscillator, is used for accurate channel separation and signal detection using the PLL.

The receiver portion of the panel uses active tuned filters to separate the subcarriers on the lower three channels.  Dual five-watt amplifiers are built in to allow the reproduction of stereo input to the transmitter side of the panel.

A fiber optic cable acts as the interface between the transmitter and receiver.  However, if the equipment is available, either the Laser Communications panel (SIP376-IP) or the Microwave Communication panel (SIP365A/B) could provide the communications link.

TDM PANEL DESCRIPTION

The TDM system provides five channels of high-speed switching.  One channel provides synchronization between the transmitter and receiver.  A fiber optic cable interfaces the transmitter and receiver.  Each channel is approximately 1.5 millisecond wide.  The panel directly interfaces with the laser or microwave communications systems.

An on-board function generator provides four wave-shapes.  The panel also can be directly interfaced with a stereo cassette player.  High quality stereo music is transmitted through the system to the dual speakers.

COURSE TIME: 20 Hours (FDM and TDM)

EXPERIMENTAL TOPICS

1. Principles of FDM in Telephony
2. Single-Sideband Transmission
3. Single-Sideband Reception
4. Filtering and Post Detection Filtering
5. Subcarrier FM Modulation and Detection
6. Signal Summing and Splitting
7. Pilot Frequency Synchronization
8. Frequency Synthesis
9. Tone Generation
10. Fiber Optic Interface
11. Time Division Multiplexing Techniques
12. FDM/TDM Microwave Interface

EQUIPMENT (Included)

EQUIPMENT (Optional)

POWER BASES REQUIRED

(1) S300PB Power Supply Base
(1) S300PB Panel Base

WEIGHT OF INCLUDED EQUIPMENT
4.0 lbs (6.4 kg)

SPECIFICATIONS