Chapter 4 Performance Checks
4.1 General
These radios meet published specifications through their manufacturing process by utilizing high
accuracy laboratory-quality test equipment. The recommended field service equipment is as accurate
as the manufacturing equipment with few exceptions. This accuracy must be maintained in
compliance with the manufacturer’s recommended calibration schedule.
4.2 Power–Up Self Test
Whenever the radio is turn on, it initiates a self-test routine which checks the RAM, EEPROM
hardware and EEPROM checksum. If Self Test passes, the green LED flashes once and a Self-Test
Pass Tone is generated. If unsuccessful, the red LED flashes rapidly and a Self-Test Fail Tone is
heard.
4.3 LCD/LED/Button/Volume Knob Test Mode
1. Make sure the radio is turned off.
2. Turn on the radio and immediately press 3 times. The LED turns solid amber. The LCD
displays the following indication (Figure 4-1) and the backlight is activated.
3. The radio will operate as shown in Table 4-1. if any key is pressed while in test mode.
Figure 4-1. LCD Indication
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