Describe the procedure to safely de-energize and ground a microwave dish antenna prior to performing maintenance.

To safely de-energize and ground a microwave dish antenna before maintenance, a strict lockout/tagout procedure must be followed. First, identify the circuit breaker or disconnect switch that controls the power supply to the antenna's radio unit. Verify the correct breaker by consulting the site documentation and, if possible, confirming with remote monitoring systems that the antenna is no longer transmitting. Open the circuit breaker or disconnect switch to de-energize the antenna. Apply a lockout device to the breaker or switch to prevent it from being accidentally re-energized. Attach a tag to the lockout device indicating that the equipment is out of service for maintenance and who placed the lockout. Next, verify that the antenna is de-energized by using a calibrated voltmeter to test for voltage at the antenna's power input. After confirming that the antenna is de-energized, connect a temporary grounding cable to the antenna's grounding point and to a known good ground, such as the tower's grounding bus bar. This provides a path for any residual voltage or induced current to safely dissipate. Finally, visually inspect the antenna and grounding connections to ensure that everything is properly installed and secured before commencing maintenance. These steps are essential to protect workers from electrical shock and prevent damage to the equipment.