Ericsson LBI-38505A Specifications download pdf (Page 2)

TABLE OF CONTENTS

Page

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

MODIFICATION INSTRUCTIONS (High Side Injection) . . . . . . . . . . . . . . . . . . . . . . . . 3

FRONT END ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

ICOM FREQUENCY ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

COMPLETE RECEIVER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

TEST PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Audio Power Output And Distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Usable Sensitivity (12 dB Sinad) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Modulation Acceptance Bandwidth (IF Bandwidth) . . . . . . . . . . . . . . . . . . . . . . . . . 8

TROUBLESHOOTING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

ILLUSTRATIONS

FIGURE 1 - DISASSEMBLY PROCEDURE (Top View) . . . . . . . . . . . . . . . . . . . . . . . . 2

FIGURE 2 - RECEIVER BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

FIGURE 3 - DISASSEMBLY PROCEDURE (Bottom View) . . . . . . . . . . . . . . . . . . . . . . . 3

FIGURE 4 - RECEIVER MODULE LOCATION DIAGRAM . . . . . . . . . . . . . . . . . . . . . . 3

FIGURE 5 - TEST POINTS AND ALIGNMENT CONTROLS . . . . . . . . . . . . . . . . . . . . . . 4

FIGURE 6 - TEST SETUP FOR 20 Hz DOUBLE-TRACE SWEEP ALIGNMENT . . . . . . . . . . . . . . 4

FIGURE 7 - FREQUENCY CHARACTERISTICS vs. TEMPERATURE . . . . . . . . . . . . . . . . . . 5

Squelch Sensitivity

Critical Squelch

0.25

µ

V0.1

µ

V

Maximum Squelch

Greater than 12 dB NQ (less than 1.0

µ

V)

Frequency Stability

2C-ICOMs

±

0.0002% (-40°C to +70°C)

Modulation Acceptance

±

7 kHz (narrow-band)

Maximum Frequency Separation

Full Specifications 3 dB Degradation

406-470 MHz

1.60 MHz 2.0 MHz

470-494 MHz 1.50 MHz 2.0 MHz

494-512 MHz 1.50 MHz 2.0 MHz

Frequency Response

Within +2 and -8 dB of a standard 6 dB per octave de-emphasis curve from 300 to

3000 Hz (1000 Hz reference)

RF Input Impedance

50 ohms

*These specifications are intended primarily for the use of the serviceman. Refer to the appropriate Specification Sheet for

the complete specifications.

SPECIFICATIONS*

Audio Output (to 8-ohm Speaker) 1 Watt at less than 3% distortion

Sensitivity

With Pre-Ampl Without Pre-Ampl

12 dB SINAD (EIA Method)

0.20

µ

V0.35

µ

V

20 dB Quieting Method

0.25

µ

V0.50

µ

V

SELECTIVITY

EIA Two-Signal Method (25 kHz Spacing) -90 dB -90 dB

Spurious Response -90 dB -100 dB

Intermodulation (EIA) -75 dB -80 dB

Although the highest DC voltage in MASTR II receiver is +12 Volts DC, high current may be drawn under short circuit

conditions. These currents can possibly heat metal objects such as tools, rings, watchbands, etc., enough to cause burns.

Be careful when working near energized circuits!

High-level RF energy in the transmitter Power Amplifier assembly can cause RF burns upon contact. Keep away from

these circuits when the transmitter is energized!

WARNING

LBI-38505 LBI-38505

1

Ericsson LBI-38505A Specifications Page 2

Comments to this Manuals

Ericsson LBI-38505A Specifications Page 2

Comments to this Manuals

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