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Installation

24 Apollo SL50 / SL60 Installation Manual

GPS NAVIGATION CHECKOUT

Switch on the SL50/60 in the normal mode to complete the this part of the checkout. The

SL50/60 will go through a sequence of self tests.

The SL50/60 requires a “seed” position, time, and date for the GPS sensor to know which

satellites to look for. Once this is entered, it will be saved and updated automatically. If the

SL50/60 is moved a great distance without being turned on, the seed position may have to be

re-entered.

Entering the seed position:

1. During the display startup sequence, press SEL when the position page is displayed.

2. Rotate the LARGE knob to move the cursor to different fields, rotate the SMALL knob to

input the correct lat/lon, and then press ENT to save the changes.

The seed position can also be input with reference to a waypoint. Refer to the user’s manual

for instructions.

Entering the time and date:

1. Press the SYS button, rotate the LARGE knob to display the “SYSTEM INFO” page, and

press ENT.

2. Press SEL, rotate the LARGE knob to move the cursor to different fields, rotate the SMALL

knob to input the correct time, and then press ENT to save the changes.

GPS Operation and Position

This checkout is to be completed with the aircraft moved away from hangars and other

structures that may obstruct the view of the satellites.

1. Turn on the SL50/60 and allow the unit to acquire a position. All other avionics should

be turned off for this part of the test.

2. Check the position using the lat/lon navigation page. Press the NAV button and rotate the

LARGE knob to the lat/lon page. The lat/lon should agree with a known reference

position.

3. Check the signal reception using the GPS sensor displays in the System mode. Press the

SYS button, rotate the LARGE knob to the “GPS SENSOR:” page, and press ENT. Then

rotate the

SMALL knob to display the GPS info. Typical signal levels are 50 or better.

4. Turn on other avionics one at a time and check the GPS signal reception to make sure it

is not affected.

5. Check for VHF comm transmitter interference. This must be completed on all IFR

installations.

a) Verify that 5 to 8 satellites are in DATA and the NAV flag is out of view.

b) Tune the comm to 121.150MHz and transmit for 20 seconds.

c) Verify that the position is not lost.

d) Repeat for additional frequencies as follows.

121.125MHz 131.225MHz

121.175MHz 131.250MHz

121.200MHz 131.275MHz

121.225MHz 131.300MHz

121.250MHz 131.325MHz

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Apollo SL Manuel d'installation Page 32

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