Bird Technologies AT100 - Manual (Page 41)

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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 2 to 136MHz. This is a relative
measurement. The measurement sensitivity is such that a
full scale deflection will occur for a field of 8 Volts/Meter at
100 MHz. The gain factor can be adjusted to increase the
measurement sensitivity to 0.08 Volts/Meter.
Turn Audio On/Off
The pitch varies with the field strength.
y Press the MENU key.
y Press the FIELD STR key.
y Pressing 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.
y Press the MENU key.
y Press the FIELD STR key.
y Press 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.