Ericsson EDACS MDX Manual del operador descargar pdf (Pagina 3)

INTRODUCTION

This manual describes the operation of the EDACS-2 Utility Soft-

ware that is provided with TQ-3346/TQ-3373 Programming software.

The Utility Software is used to make Final Transmitter and Receiver

Alignments on the Dual Format PCS portable radio. This manual de-

scribes how to calibrate and adjust the Tracking Data in the PCS radio

using the Utility Program. It is also used for changing the Feature Authori-

zation on the Dual Format MDR and MDX mobile radios along with the

Dual Format PCS portable radio.

TRACKING DATA (PCS Only)

Tracking Data establishes individual radio parameters and tailors the

operation of the unit across the band. The four parameters include High

and Low RF Power, Modulation Level, Data Modulation and Receiver

Squelch opening. This data is programmed into the personality EEPROM

at the factory after the Front and Rear Assemblies are joined together.

Tracking data values are not used for each individual channel. In-

stead, the 806-824 MHz band is divided into 3 band segments and the

851-869 MHz band is also divided into 3 band segments. All channels

within each band segment use the same tracking values.

Tracking Data should not normally be altered; however, it may be

necessary to reprogram some of the values after aligning circuitry, or

replacing modules or other components which obsolete the previously

programmed values. Typical starting values for each parameter are listed

in Table 1.

Digital values stored for the POWER SET analog voltage are one

example of tracking information. As no two transmitter stages are exactly

matched, the POWER SET DC voltage will be slightly different with any

two radios to produce the same power output. Tracking Data allows the

microprocessor to tailor the POWER SET line for the RF stage difference

from unit-to-unit and across the band.

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Ericsson EDACS MDX Manual del operador Pagina 3