Chapter 5

Field Strength

Field Strength Measurement

With the field strength antenna installed, the Antenna Tester can be used to optimize the radiated signal of any transmitter from 65 to 520MHz. This is a relative measurement. The measurement sensitivity is such that a full scale deflection will occur for a field of 0.22 Volts/Meter at 400 MHz. The gain factor can be adjusted to increase the measurement sensitivity to 0.02 Volts/Meter. Sensitivity at other frequencies can be estimated by observing the return loss display with the field strength antenna installed.

Turn Audio On/Off

The pitch varies with the field strength.

yPress the MENU key.

yPress the FIELD STR key.

yPressing the AUDIO key toggles between on and off.

Enter Gain Factor / Select Auto Gain

Increasing the gain factor increases the measurement sensitivity. Setting the gain to auto will set a gain factor so that the pointer is in the middle of the scale.

yPress the MENU key.

yPress the FIELD STR key.

yPress either:

AUTO GAIN- the pointer moves to the approximate middle of the scale.

GAIN- The cursor will blink on the gain value. Enter the desired value using the numeric keypad or change the value using the UP/DOWN arrow keys. Press the ENTER key.

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Bird Brain AT-400 manual Field Strength Measurement, Enter Gain Factor / Select Auto Gain

AT-400 specifications

The Bird Brain AT-400 is a cutting-edge unmanned aerial vehicle (UAV) designed for versatility and performance in various applications such as surveillance, surveying, and environmental monitoring. This advanced drone incorporates state-of-the-art technologies and features that set it apart in the rapidly evolving drone market.

One of the standout features of the Bird Brain AT-400 is its exceptional flight stability and maneuverability. With a lightweight carbon-fiber frame, the AT-400 boasts an aerodynamic design that ensures efficient flight even in challenging weather conditions. The aircraft is equipped with advanced navigation systems, including GPS and inertial measurement units (IMUs), enabling it to maintain precise positioning and altitude control.

Powered by a high-capacity lithium-polymer battery, the AT-400 offers an impressive flight time of up to 45 minutes, depending on payload and environmental conditions. This extended operational time allows users to cover large areas without frequently returning to base for recharging.

The AT-400 is designed for modularity, allowing users to easily switch out payloads according to mission requirements. It can support various sensors, including high-resolution cameras, thermal imaging devices, and multispectral sensors for agricultural monitoring. This flexibility makes it ideal for industries such as agriculture, construction, and disaster management.

Another critical feature of the Bird Brain AT-400 is its advanced data transmission system. The UAV utilizes real-time video and data transmission capabilities, allowing operators to monitor live feeds and collect important information during flight. This system ensures that critical data is available immediately, enhancing decision-making processes on the ground.

Safety is a paramount consideration in the design of the AT-400. The aircraft is equipped with multiple redundancy systems, including dual electronic speed controllers and fail-safe mechanisms to ensure that it can safely return to base in the event of an emergency.

In terms of user experience, the Bird Brain AT-400 comes with an intuitive ground control station, featuring a user-friendly interface that simplifies mission planning and operation.

Overall, the Bird Brain AT-400 combines powerful performance with innovative technology and user-centric design, making it an excellent choice for both professional and recreational drone enthusiasts seeking reliability, efficiency, and adaptability in the field.