LBI-38557

LBI-38557

 

 

BNC CONNECTOR

PROGRAMMING

Figure 2 - Disassembly

FRONT COVER

CAUTION

1.Remove the battery as described in the previous

 

section.

When separating the Synthesizer and Transmit/Re-

2.

Remove the two screws at (A) (See Figure 2).

ceive boards, care should be taken not to bend the

connector pins.

3.

Carefully lift the front cover from the radio.

 

 

1.Remove the No. 3-48 x .125 setscrew (D) using a 0.050 hex tool.

2.Unsolder the BNC center pin from the antenna contact.

3.Remove the BNC connector.

UDC COVER

Remove the M2.5-0.45 screw using a flat blade screw- driver or the edge of a coin.

TOP COVER

1.Pull off the two knobs from the ON/OFF/VOLUME and the Squelch control.

2.Remove the Spanner nuts (E) using a Spanner Tool ST2311.

3.Remove the 1/4-40 (F) nut using a 5/16 wrench.

4.Remove the top cover from the T/R assembly.

SIDE PANEL

1.Remove the two Audio Jack Spanner nuts (G) using a Spanner Tool ST2312.

2.Remove the side panel from the T/R Assembly.

PERSONALITY PROGRAMMING

The MPI-II radio is programmed through a test cable connected to the accessory connector located on the side of the radio. Power is applied to the battery terminals located on the rear radio assembly. B+ should be 7.5V for a 2 watt radio and 10.0V for a 4 watt radio.

Programming information must be written to the person- ality PROM before alignment or performance tests. This is always done through the accessory connector and cable. This cable may be attached to the radio and left connected during the entire test procedure.

The assigned frequencies to be used should be pro- grammed into the personality of each 2-channel radio:

First Transmit frequency

Tx

F1

First Receive frequency

Rx F1

Second Transmit frequency

Tx

F2

Second Receive frequency

Rx F2

The radio’s chosen options must alos be programmed in:

Channel Guard (with C.G. frequency)

No Channel Guard

Digital Channel Guard (with D.C.G. code)

Type 99 Tone (with Tone A Frequency, Tone B Fre- quency)

Talk-around (enable, disable)

STE (enable, disable)

Channel Busy Inhibit (enable, disable)

Detailed programming instructions should be followed as found in the TQ-3351 Programming Manual.

4.Unplug the cable between the front cover MIC Board and the T/R Board.

5.To gain access to the microprocessor, remove the three screws at (B) and lift up the cover.

SYNTHESIZER BOARD

The Synthesizer Board may be separated from the Transmit/Receive Board by prying the connectors straight out from the pins.

REAR COVER

1.Remove the screw at (C) using a No. 7 TORX screw- driver (See Figure 2).

2.Remove the four M2 pan head screws, 3 at (B) and 1 at (H), on the component side of the T/R Board using a No. 7 TORX screwdriver.

3.The RF Board with the top cover and the side panel attached may now be removed from the rear cover.

The MPI-II Personal Radio is equipped with a 256 x 8 bit serial personality EEPROM. All cutomer information such as the customer frequencies, customer tones and customer op- tions are stored in the EEPROM. The EEPROM contains all information to tailor the operation of the radio to the user’s requirements. The EEPROM is programmed by using an IBM compatible personal computer with MSDOS, Interface Box 19D438367G1, RS-232 Cable 19B235027P1, Programming Cable TQ-3352 and Programming Software TQ-3351.

ALIGNMENT AND TEST

Initially, the Receiver of the MPI-II Personal Radio is aligned and ready for use before leaving the factory. The Transmitter is tuned at the high end of the band, with retuning recommended for optimum operation when another frequency is selected. This section provides procedures for aligning and testing the MPI-II VHF (136-174 MHz) Personal Radio.

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Ericsson MPI-II VHF manual Personality Programming, Alignment and Test

MPI-II VHF specifications

The Ericsson MPI-II VHF is a cutting-edge mobile radio communication system designed to facilitate reliable and efficient communication in various environments. Featuring advanced technologies, the MPI-II is particularly suited for organizations that require dependable communication under challenging conditions, such as public safety agencies, transportation services, and other sectors where operational continuity is essential.

One of the hallmark features of the Ericsson MPI-II VHF is its robust construction, making it resilient against environmental stresses such as temperature fluctuations, humidity, and mechanical shocks. This durability ensures that it can withstand the rigors of outdoor operations and maintain functionality in harsh conditions.

The MPI-II operates on the Very High Frequency (VHF) range, allowing for long-range communication capabilities. This is particularly advantageous in scenarios where coverage needs to extend over large areas, such as in rural or mountainous regions. The design of the radio system also enables it to provide clear audio quality, which is critical for effective communication, especially in emergencies.

Another significant technology integrated into the MPI-II is its digital signal processing (DSP) capabilities. This feature enhances audio clarity even in high-interference environments, reducing background noise and ensuring that critical messages are conveyed effectively. This level of clarity can be a lifesaver in urgent situations where miscommunication can lead to severe consequences.

The radio also supports a wide range of accessories, including microphones and headsets, allowing for customized solutions tailored to specific operational needs. User-friendly interfaces and programmable features enable users to configure the device to their preferences, improving efficiency in communication.

Moreover, the Ericsson MPI-II VHF incorporates secure communication technologies to ensure that sensitive information remains protected from unauthorized access. This feature is crucial for sectors that deal with confidential data and require assurance against potential breaches.

In terms of energy efficiency, the MPI-II is designed to consume less power, extending the operational lifespan during field use. This is critical in situations where access to power sources is limited.

With its blend of durability, advanced digital processing, secure communication, and energy-efficient design, the Ericsson MPI-II VHF stands out as a reliable solution for professional communication across various industries. It embodies the evolving landscape of mobile communication technology, ensuring that users remain connected and informed in any situation.