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Installation
Apollo SL30 Installation Manual
37
Enable weather frequencies
This function determines whether the weather frequencies in common use in North America
are displayed, or not.
1. In the Setup Mode, rotate the large knob to select ENABLE WEATHER FREQUENCIES.
2. Press SEL to activate selection. The Yes or No value will flash.
3. Turn the small knob to change the value.
4. Press ENT to accept and save the settings.
VHF Comm Checkout
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 V
swr
can be checked using an inline wattmeter in the antenna coax using
frequencies near both ends of the band. The V
swr
should be < 2:1, and is not to exceed 3:1. A
V
swr
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 1 to 100, and variable. The sidetone level can be adjusted during transmit.
Transmit Mic Selection
The Transmit Microphone page controls which microphone is permitted to transmit. Choose
Mic 1, 2, or both. To select the Transmit Mic control:
1. Press the SYS button and rotate the large knob to T
RANSMIT MIC page.
2. Rotate the small knob to select MIC1, MIC2, or MIC1+MIC2.
3. Select an appropriate frequency, key the transmitter, and talk into the microphones to
check for the intended operation.
FINAL SYSTEM CHECK
The SL30 functions should be complete at this time. The final check includes verifying VOR
and ILS operation. Start with the unit turned on and operating in the normal mode. Refer to
the user’s manual for operating instructions.
RS-232 Serial Interface Checks
The interfaces to other equipment, such as the GX series GPS, should be checked as follows:
1. Operate the SL30 and GX unit in normal mode.
2. Press the Direct To button on the GPS unit and select an airport. Press ENT.
3. Operate the SL30 in Comm mode. Press SEL.