Ericsson LBI-38505A manual Specifications, Table of Contents

LBI-38505 LBI-38505

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

Squelch Sensitivity

Critical Squelch

Maximum Squelch

Frequency Stability

2C-ICOMs

Modulation Acceptance

Maximum Frequency Separation

406-470 MHz

470-494 MHz

494-512 MHz

Frequency Response

RF Input Impedance

0.25 μV	0.1 μV
Greater than 12 dB NQ (less than 1.0 μV)

	±0.0002% (-40°C to +70°C)
	±7 kHz (narrow-band)
Full Specifications	3 dB Degradation
1.60 MHz	2.0 MHz
1.50 MHz	2.0 MHz
1.50 MHz	2.0 MHz

Within +2 and -8 dB of a standard 6 dB per octave de-emphasis curve from 300 to 3000 Hz (1000 Hz reference)

50 ohms

	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

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 μV	0.35 μV
20 dB Quieting Method	0.25 μV	0.50 μV
SELECTIVITY
EIA Two-Signal Method (25 kHz Spacing)	-90 dB	-90 dB
Spurious Response	-90 dB	-100 dB
Intermodulation (EIA)	-75 dB	-80 dB

Copyright © May 1990, Ericsson GE Mobile Communications Inc.

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

WARNING

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!

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