Ericsson LBI-31932E Maintenance Manual
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Ericsson LBI-31932E, LBI-31932E Mobile Communications Maintenance Manual Printed in U.S.A. MVS SYNTHESIZED MOBILE RADIO 403-512 MHz, 25 WATT MOBILE COMBINATION TABLE OF CONTENTS RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38258 PA BOARD . . . . . . . . . . . . . . . . . . . . . . . . . LBI-31934 AUDIO BOARD . . . . . . . . . . . . . . . . . . . . . . LBI-31922 LOGIC BOARD . . . . . . . . . . . . . . . . . . . . . . LBI-38899 SYSTEM BOARD
Ericsson LBI-31932E, C O M B O TABLE OF CONTENTS Page SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRANSMITTER Power Output 25 Watts Conducted Spurious 60 dB Below Carrier (typical) Modulation ±5.0 kHz (maximum) Audio Sensitivity 40 millivolts (typical) Audio Frequency Characteristics (Per RS-I52B) Within +1 to -3dB of 6 dB/octave pre-emphasis from 300 Hz to 3000 Hz per EIA standards. Post limiter filter per FCC and EIA. FMNoise -50dB (typical, companion
Ericsson LBI-31932E, GENERAL DESCRIPTION The MVS mobile radio is a synthesized, wideband radio, utilizing microcomputer technology to provide high reliability, high quality, and high performance in two-way, FM, mobile communications. The MVS provides 25 watts of RF output power across each band split (403-440 MHz, 440-470 MHz, and 470-512 MHz) without retuning. The receiver can cover any 20 MHz segment of each band split without retuning. The MVS radio is easy to operate with large buttons for function selection and an ea
Ericsson LBI-31932E, AVAILABLE OPTIONS CONTROL PANELS The Control Panel plugs into the Front Cap Assembly and determines the number of channels (2 without scan, 16 or 128 with scan), the Type 99 decode option, or the Public Address option. The panel is made of highly durable plastic with rounded corners and recessed controls for passenger safety require- ments. There are 7 different optional interchangeable control pan- els available: • Option CP01 2 Channel (19B801450P1) • Option CP02 2 Channel • with Type 99 decode (19B801450P2) • Option CP03 16 Channel • with scan (19B801450P3) • Option CP04 16 Channel • with scan and Public Address
Ericsson LBI-31932E, EXTERNAL ALARM FOR T-99 External Alarm Relay Option SU01 (19A705499P1) is used with the Type 99 Control Panel options. The relay re- quires External Alarm ON/OFF switch Option SU02 (19C851585P7) and connects to pin 13 of option cable Option CC01. The relay can sound the vehicle horn when a Type 99 call is received. The alarm switch is used to turn the horn relay on or off. PUBLIC ADDRESS RELAY The Public Address Relay switch (19C851585P6) is sup- plied with the Public Address Control Panel Option and re- quires an external speaker and option cable Option CC01. The relay provides automatic switching of the public address audio to an external speaker when the micropho
Ericsson LBI-31932E, CHANNEL Two push type switches. Press CHANNEL (up arrow) to in- crease the channel number; press CHANNEL (down arrow) to decrease the channel number. The channel number will be shown on the display. Unprogrammed channels will be skipped. SCAN A momentary type switch to turn the scan function on or off. When used in conjunction with the CHANNEL switch it en- ables the ADD/DELETE Function to allow the scan list to be modified. When turned on, the display will show "SCN" in the lower center portion of the display. MODE A momentary type switch used in the 128 channel models only. These
DELETE SCAN CHANNEL (S,P1,P2) 1. Confirm that the radio is on. If not, press the power switch. 2. If SCN indicator is lit, press and release SCAN switch to disable scan function. 3. Select the desired channel to be removed from the scan list using the CHANNEL UP or DOWN switches. 4. Press and hold SCAN switch; then press the CHANNEL DOWN switch once. This removes the selected channel from the
Ericsson LBI-31932E, DETAILED SCAN OPERATION The scan operation is controlled by the Logic Board, and provides for scanning any or all of up to 16 channels. The scanned channels may be located anywhere within the fre- quency band of the radio, and can include two priority chan- nels (P1 and P2). If desired, all 16 channels can be scanned with or without priority level. When SCAN is enabled, scanning of the selected channels starts immediately. Scan time is approximately 15 to 160 milliseconds per channel, depending upon whether Chan- nel Guard has been programmed for a particular
Ericsson LBI-31932E, f. Carrier on P2 and right Channel Guard Display P2, scan P1 P1-P1-P1-P1-P1-P1-... tb=500 msec ts=32 msec g. Carrier on P2 with right Channel Guard, carrier/wrong Channel Guard on P1 P1-P1-P1-P1-P1-... tb=2.5 seconds ts=75-175 msec CONDITION 2: Priority 1 has Channel Guard programmed, Priority 2 does not. a. No carriers detected on P1 or P2 P1-P1-P2-P1-P1-P2-P1-P1-P2-... tb (time between samples) =500 msec ts (time of sample) =32 msec b. Carrier on P1 detected/wrong Channel Guard P1-P2-P2-P2-P2-P2-P1-P2-P2-P2-P2-P2-P1-P2-... tb=1 second ts=32 mscec for P2 75-175 msec for PI c. Carrier on P1 detected/right Channel Guard Stop on P1, stop sca
Ericsson LBI-31932E, In the EGE tone format, the first tone may be from tone group A (for Individual or Group calls) or from tone group C (for Super Group calls). The second tone may be from tone group B (for Individual calls) or from tone group D (for Group and Super Group calls). The EGE tone format is illus- trated below. For example, assume the paging number to be 123. The first digit of the paging number is a I. Look in Table 2, and read down the column labeled "100’s Digit" to a 1. Read horizontally across to the column labeled
MECHANICAL PARTS BREAKDOWN PARTS LIST C O M B O Table 5 - Motorola Tone Frequencies And Groups Tone No. Tone Group 1 Tone Group 2 Tone Group 3 Tone Group 4 Tone Group 5 Tone Group 6 1 2 3 4 5 6 7 8 9 0 349.0 Hz 368.5 Hz 389.0 Hz 410.8 Hz 433.7 Hz 457.9 Hz 483.5 Hz 510.5 Hz 539.0 Hz 330.5 Hz 600.9 Hz 634.5 Hz 669.9 Hz 707.3 Hz 746.8 Hz 788.5 Hz 832.5 Hz 879.0 Hz 9
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