Apollo SL Manuel d'installation télécharger pdf (Page 33)

Installation

Apollo SL50 / SL60 Installation Manual

131.200MHz 131.350MHz

e) Repeat for each comm transmitter.

f) If the SL50/60 is susceptible to VHF comm transmitter interference, then better

isolation, or distance, may be required between the GPS and VHF antennas. With

some comm transmitters, a notch filter may be required in series with the VHF

comm antenna coax at the rear of the comm unit.

Note: Older VHF comm transmitters may emit higher levels of harmonic interference

causing greater problems and may be more difficult to deal with.

Interface Checks

The interfaces to other equipment, such as the SL40 or a moving map display, should be

checked. Refer to the SL50/60 user’s manual for this part of the checkout. Make sure the other

equipment is connected and switched on.

To check the serial data output connections, verify the data from the SL50/60 can be displayed

on the other units, such as a moving map display or the SL40.

VHF COMM CHECKOUT (SL60)

Receiver / Transmitter Operation

Tune the unit to a local frequency and verify the receiver output produces a clear and

understandable audio output. Verify the transmitter functions properly by contacting another

station and getting a report of reliable communications. Check the remote flip/flop.

Antenna Check

The antenna VSWR can be checked using an inline watt meter in the antenna coax using

frequencies near both ends of the band. The VSWR should be < 2:1, and is not to exceed 3:1.

A VSWR of 2:1 will cause a drop in output power of approximately 12%, and 3:1 causes

approximately a 26% drop.

Sidetone Level Adjustment

The sidetone volume was preset at the factory to a typical audio level. The level can be

adjusted using one of the built-in system functions. To adjust the sidetone level:

1. Press SYS, rotate the LARGE knob to the “COM RADIO INFO:” page, and press ENT.

2. Rotate the LARGE knob to the “SIDETONE LEVEL:” page.

3. Rotate the

SMALL knob to adjust the sidetone level. The sidetone level is displayed in a

range of 000 to 255, with 255 the highest level. The sidetone level can be adjusted during

transmit.

Comm Flight Test Check

A flight test is recommended as a final installation verification. The performance may be

verified by contacting a ground station at a range of at least 50nm while maintaining an

appropriate altitude and over all normal flight attitudes. Performance should be checked using

low, high, and mid band frequencies.

FINAL SYSTEM CHECK

The SL50/60 GPS navigation functions should be complete at this time. The final check

includes checking database, entering a direct to waypoint, and checking the navigation

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Apollo SL Manuel d'installation Page 33

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