Apollo SL70 Operation Manual

Using Altitude Hold
Altitude Hold helps you maintain a constant altitude. The current pressure
altitude is stored as a reference and is the displayed value unless Altitude Hold
is activated. The hold altitude is displayed in 100-foot increments. The
displayed altitude is the same as is sent for Mode C interrogation replies.
When the HLD button is pressed, the altitude display will be set to "+000."
The altitude display values will increase/decrease as the aircraft changes
altitude. The altitude display will flash when the aircraft change in altitude
exceeds the selected threshold.
Setting the Hold Altitude
1. Press the HLD button to set the current altitude as the hold altitude. The
LED above the HLD button will light to indicate Altitude Hold is active.
2. The Altitude display now shows a value that is relative to the hold altitude
in 100-foot increments. A displayed value of +001 means you are 100 ft
above the hold altitude.
Setting the Altitude Hold Buffer
1. Set the Altitude Hold Buffer value by pressing the HLD button for two
seconds, or longer. Select a value between 200 and 2500 feet. The factory
default value is 300 feet. The value is retained when the SL70 is turned off.
2. Turn the S knob to change the buffer value, such as ±02. Press HLD
MALL
again to save the value.
Displays
Squawk Codes
The four-digit squawk code is shown on the left side of the display.
Altitude
The Altitude display is used to show the pressure altitude, Hold Altitude, and
Hold Altitude buffer with 100 ft resolution.
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Mode C Transponder
Model SL70
Operation Manual
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