Radio Alignment Procedures: Receiver Tuning

5-13

 

 

3.Set softpot to its maximum value to mute the radio.

4.Adjust the softpot value by using the slider, keying in the edit box or using the spin controls. Press ENTER to confirm the selection or use the spin controls. Do this until the radio is totally unmuted. Verify the squelch closing by inputting a signal level of 4 dB lower than that of the 10 dB SINAD level.

5.Repeat Steps 2 through 4 of Manual Squelch Tuning, for frequency points F2-F7.

6.Press Program to commit the softpot values into the radio.

7.Exit the Squelch Tuning function.

5.5.2.2Auto Tune

Note: Proceed with caution since this procedure automatically programs the softpot value into your radio.

When you press the Auto Tune button, the radio automatically returns an optimum squelch value.

After you press the button, the radio may need time to produce an optimal setting for the squelch attenuation. The following steps describe the auto tune process:

1.Select current frequency point (F1 being the first), then press Auto Tune.

2.Repeat Steps 3-4 of the Manual Squelch Tuning section for frequency points F2-F7.

Note: Auto Tune will automatically update your radio’s codeplug. Please be careful when using it.

5.5.3RSSI System Level Tuning

Figure 5-11. RSSI Tuning

1.Under the Rx Align menu, select RSSI Tuning (Figure 5-11).

2.Inject an on channel signal to the radio at -47 dBm at the frequency listed. Modulate the signal with a 1 kHz tone at 60% deviation (3 kHz) to verify that the radio is receiving the desired fre- quency. RSSI tuning is only done at 25 kHz channel spacing.

3.Change the level to the defined dBm level in the softpot box. (-115 dBm or -105 dBm).

4.Press the Update button for the soft spot to be tuned to the RSSI value correlating to the applied level. The programmed RSSI value will be displayed.

HKLN4215A

December 3, 2003

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Motorola EP450 service manual Auto Tune, Rssi System Level Tuning
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EP450 specifications

The Motorola EP450 is a robust and reliable two-way radio that has made a significant impact in the world of professional communications. Known for its solid construction and exceptional performance, the EP450 is a popular choice among various industries, including security, transportation, and event management.

One of the standout features of the Motorola EP450 is its impressive audio quality. Equipped with advanced audio processing technologies, the radio offers clear and crisp sound, ensuring effective communication even in noisy environments. This feature is particularly beneficial for users who work in fields where situational awareness and timely communication are crucial.

The EP450 operates on both VHF and UHF frequency bands, making it versatile for various communication needs. With 16 channels and a wide frequency range, users can easily switch between channels to avoid interference and ensure secure communications. Additionally, the radio offers a programmable feature, allowing users to customize button functions and settings, which enhances the overall user experience.

The battery life of the EP450 is another notable characteristic. It comes powered with a long-lasting rechargeable battery that provides extended usage on a single charge. This ensures that users can rely on the device throughout their shifts without concerns about running out of power. Furthermore, the EP450 features a battery save mode that helps conserve energy when the radio is not in use.

In terms of design, the Motorola EP450 is built to withstand tough environments. Its rugged housing is dustproof and can withstand exposure to water, making it suitable for outdoor use. Additionally, the radio's user-friendly interface includes a large display and oversized buttons, allowing users to operate it easily even with gloves or in challenging conditions.

Furthermore, the EP450 supports various accessories, such as headsets and external microphones, enhancing usability and flexibility in various operational scenarios. This adaptability allows users to customize their communication solutions based on specific needs.

In conclusion, the Motorola EP450 stands out for its superior audio quality, versatile frequency operation, long-lasting battery life, and rugged design. These features make it an indispensable tool for professionals who require reliable communication in demanding environments, proving its value across a multitude of industries.
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