User's Manual

6. Stadiametric Rangefinder
The AURORA A3 model integrates a Stadiametric Rangefinder Function, which can estimate the
approximate distance to an object by using its size.
฀ In the home screen, press the Down button to turn the Stadiametric Rangfinder Function
on/off
฀ After this function is enabled, two horizontal lines used for measuring will appear on the
screen, and icons of three pre-configured objects and measured values will be displayed
on the left side.
฀ Dimensions of three predefined objects are:
- Deer: 1.7 m
- Wild boar: 0.9 m
- Hare: 0.2 m
฀ Place the target at the center of the screen and align the horizontal lines with the target
by pressing the UP/DOWN buttons; the approximate distance to the corresponding
target will be shown
฀ Press the POWER button again to exit to the Stadiametric Rangefinder Function
The AURORA A3R model is equipped with a Laser Rangefinder, with the detection range of 1300
yards.
฀ On the home screen, press the DOWN button to turn the Laser Rangefinder Function
on/off
฀ A range indicator icon will be displayed in the middle of the screen and the real-time
range value will be shown in the upper right corner.
฀ Press the DOWN button again to exit the Laser Rangefinder Function
7. Calibration
Calibration can be used to improve any image quality degradants or non-uniformity. Calibration
allows the detector background temperature to be balanced and can eliminate image defects.
Select “Calibration Mode” from the main menu. There are three calibration modes: Automatic (A),
Manual (M) and Background (B).
฀ A mode (Automatic): The device will calibrate automatically according to the software
algorithm
฀ M mode (Manual): On the home screen, press and hold the DOWN button for manual
shutter correction
฀ B mode (Background): Close the lens cover, press and hold the DOWN button to make
the correction, after the correction is completed, remove the lens cap