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T

his guide takes you through the basic steps for starting up and 

using your Astro System for the first time.  The 

Astro 220 Owner’s

 

Manual

 provides detailed instructions for using your Astro System 

in the field.

 

 

Install batteries in the Astro 

220

Remove the battery compartment cover from 

the back of the Astro 220 and insert two AA 

batteries into the compartment, observing 

polarity markings in the compartment. 
Be certain the VHF antenna is attached and 

snug.

 

Turn on the Astro 220 and  

DC 20 to allow them to initialize 

Take both units outdoors to get an 

unobstructed view of overhead GPS satellites to determine 

their locations. 
Press down and hold the Astro 220 

POWER

 key, located 

between the two antennas on the top of the unit, until the 

unit turns on. 
Press and hold the 

POWER

 key on the end of the DC 20 

until the red LED illuminates. 

1.

2.

1.

2.

3.

The Dog Tracker page with a status bar at the 

top appears. When three or more GPS signal 

strength bars are filled, the units determine its 

location. This should take no more than two 

minutes the first time you initialize the unit. 

After this, it should take seconds.

 

Calibrate the Compass

Before tracking your dog, it is important to 

calibrate the Astro 220 internal compass to 

ensure accuracy. Do this outdoors and away 

from large metal objects, such as automobiles and buildings.

Press 

DOG

 to open the Dog Tracker page.

Press 

MENU

, use the 

Arrow

 (

ROCKER) 

key to select 

Calibrate 

Compass

 and press 

ENT 

(

ENTER)

 to show the 

Compass Calibration page.

Follow the calibration Wizard instructions for 

calibrating the compass by slowly rotating it in a 

level position. Press 

ENTER

 to start calibration and 

ENTER

 

again when calibration is completed. It is recommended that 

you calibrate the compass after periods of storage, battery 

change, or temperature changes exceeding 20

o

 F.

4.

1.
2.

3.

Hold the unit 

level and turn 

slowly.

 

Allow the DC 20 to communicate with 

the Astro 220

The DC 20 is shipped from the factory already added to your 

Astro 220 Dog List and the battery is charged to approximately 

50% of full capacity, so you can use it immediately. Make 

certain the VHF antenna is attached and snug.

Observe the blinking red LED, indicating power is on. 

After the DC 20 has initialized 

(determined its GPS location) 

the LED then double blinks.
The Dog Tracker page 

compass pointer points in the 

direction of the dog and titles 

it “Dog”. The location updates 

every 5 seconds.

1.

2.

To check for communication and good GPS signal 

reception, while on the Dog Tracker page, press the 

ENTER

 key on the Astro 220 to view the Dog Info page. 

This page contains information about the dog such as: 

name, state of activity (running, on point, treed, sitting, and 

“unknown?” if no status can be determined), distance from 

your location, distance traveled, and average speed. It also 

provides data about the  

DC 20 transmission update rate, unit ID, 

battery capacity, communication signal 

strength, and strength of the GPS signal 

being received by the DC 20. Red bars 

indicate a weak signal while green bars 

indicate a strong signal. 

3.

DC 20 

power 

key

LED blinks 

red when 

power is on.

Dog Tracker Page

Status Bar

Dog’s distance from you

Dog Status Icon

 

Dog’s direction 

from you

VHF 

antenna

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