Garmin SL40 - Manual (Page 29)

Periodic Maintenance
Apollo SL40 Installation Manual 23
A
PPENDIX
B - P
ERIODIC
M
AINTENANCE
E
QUIPMENT
C
ALIBRATION
The SL40 design requires very few adjustments or calibration to be made. In fact, there are no
internal manual adjustments.
R
EFERENCE
O
SCILLATOR
The reference oscillator frequency should be checked approximately every 3 to 5 years to
ensure the units transmit frequency is within allowable tolerance.
The oscillator frequency can be checked by connecting the transmitter output through an
appropriate load to a calibrated frequency counter. The transmit frequency should be within
15ppm of the selected channel frequency. Contact the Garmin AT, Inc. factory for instructions
on adjusting the frequency if required.
C
LEANING THE
F
RONT
P
ANEL
The front bezel, keypad, and display can be cleaned with a soft cotton cloth dampened with
clean water. DO NOT use any chemical cleaning agents. Care should be taken to avoid
scratching the surface of the display.