4-4

 

 

 

 

 

 

 

 

Performance Checks: RF Test Mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4-4. Test Frequencies

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel Selector

 

Test Channel

 

VHF R2

 

 

UHF R1

UHF R2

UHF R3

 

 

 

Switch Position

 

 

(MHz)

 

 

(MHz)

(MHz)

(MHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 Low Power

 

TX#1 or #8

 

146.625

 

403.625

438.625

465.625

 

 

 

8 High Power

 

RX#1 or #8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 Low Power

 

TX#2 or #9

 

150.775

 

409.775

443.775

470.775

 

 

 

9 High Power

 

RX#2 or #9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 Low Power

 

TX#3 or #10

 

155.275

 

415.275

448.275

475.275

 

 

 

10 High Power

 

RX#3 or #10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4 Low Power

 

TX#4 or #11

 

160.125

 

421.125

454.125

480.125

 

 

 

11 High Power

 

RX#4 or #11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5 Low Power

 

TX#5 or #12

 

164.475

 

427.475

459.475

485.475

 

 

 

12 High Power

 

RX#5 or #12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6 Low Power

 

TX#6 or #13

 

169.475

 

433.475

464.475

490.475

 

 

 

13 High Power

 

RX#6 or #13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7 Low Power

 

TX#7 or #14

 

173.875

 

439.875

469.875

494.875

 

 

 

14 High Power

 

RX#7 or #14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4-5. Receiver Performance Checks

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Test Name

Communications Analyzer

 

Radio

 

Test Set

 

Comments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reference

Mode: PWR MON

TEST MODE,

 

PTT to continu-

Frequency error to be

 

Frequency

4th channel test frequency*

Test Channel 4

 

ous (during the

±200 Hz VHF

 

 

 

Monitor: Frequency error

carrier squelch

 

performance

±500 Hz UHF

 

 

 

Input at RF In/Out

output at

 

check)

 

 

 

 

 

 

 

 

 

 

antenna

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rated Audio

Mode: GEN

 

TEST MODE

 

PTT to OFF

 

Set volume control to

 

 

 

Output level: 1.0m V RF

Test Channel 4

 

(center), meter

3.24Vrms

 

 

 

4th channel test frequency*

carrier squelch

 

selector to Audio

 

 

 

 

 

 

Mod: 1 kHz tone at

 

 

 

 

PA

 

 

 

 

 

 

 

3 kHz deviation

 

 

 

 

 

 

 

 

 

 

 

 

Monitor: DVM: AC Volts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distortion

As above, except to distortion

As above

 

As above

 

Distortion <5.0%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sensitivity

As above, except SINAD,

As above

 

PTT to OFF

 

RF input to be <0.30

 

(SINAD)

lower the RF level for 12 dB

 

 

 

 

(center)

 

V (0.25 V typical).

 

 

 

SINAD.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Noise

RF level set to 1 mV RF

As above

 

PTT to OFF

 

Set volume control to

 

Squelch

 

 

 

 

 

 

 

(center), meter

3.24 Vrms

 

Threshold

 

 

 

 

 

 

 

selection to

 

 

 

 

 

(only radios

 

 

 

 

 

 

 

Audio PA, spkr/

 

 

 

 

with conven-

 

 

 

 

 

 

 

load to speaker

 

 

 

 

tional system

 

 

 

 

 

 

 

 

 

 

 

 

 

As above, except change fre-

out of TEST

 

As above

 

Unsquelch to occur at

 

need to be

 

 

 

quency to a conventional sys-

MODE; select

 

 

 

<0.25 V.

 

tested)

 

 

 

 

tem. Raise RF level from zero

a conventional

 

 

 

Preferred SINAD =

 

 

 

 

 

 

 

 

 

until radio unsquelches.

system

 

 

 

6-9 dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*. See Table 4-4

December 3, 2003

HKLN4215A

Page 27
Image 27
Motorola EP450 service manual VHF R2 UHF R1 UHF R2 UHF R3

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.