Apollo SL70 Bedienungsanleitung
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 SMALL knob to change the buffer value, such as ±02. Press HLD
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.
© 1999 by UPS Aviation Technologies, Inc. All rights reserved. Printed in the
U.S.A.
UPS Aviation Technologies, Inc.
2345 Turner Road, S.E. Salem, OR 97302
U.S.A. Toll Free 800.525.6726
Canada Toll Free 800.654.3415
International 503.391.3411
FAX 503.364.2138
Visit our web page at http://www.upsat.com
Apollo®
Mode C Transponder
Model SL70
Operation Manual
August 1999 560-0401-00
Apollo SL70
The Apollo SL70 Mode C Transponder complements the Apollo SL series of
slimline avionics. The SL70 provides Mode A/C functionality certified to
TSO-C74c Class 2A meeting VFR and IFR requirements, operates on 10-35
VDC, includes squawk code display and selection, standby, altitude, and ident
operation. All of these features are contained in the space-saving 1.3”H x
6.25”W form factor, with bright easy-to-read LED characters, and user-
friendly operation. A photocell on the front of the SL70 adjusts the LED
intensity for ambient light conditions. The SL70 will automatically test its
receive function if no interrogations have been received in the last 30 seconds.
Knobs
A single knob on the left side controls power on/off. Rotate the knob
clockwise to turn transponder power on. Rotate the knob counterclockwise to
turn power off.
Dual concentric knobs on the right side are used to select squawk codes and
change altitude values. Turning the large, outer knob moves the cursor to
allow editing of the selected character. Turning the small, inner knob changes
values.
Pushbuttons
Press the pushbutton once to activate the selected operation. An LED above
each pushbutton will light when that button is pressed.
IDENT
Press the IDENT button once to reply with an identifying squawk code, Ident
mode. In Ident mode, the Reply LED will be lighted for 20 seconds. The
Reply (Ident) LED will also flash when the SL70 generates transponder
replies.
SBY
Press SBY to place the transponder in “Standby” mode. The SL70 is “on,” but
no information will be transmitted.
ON
Press for Mode A operation. The SL70 is “on” and will transmit its squawk
code when interrogated.
ALT
Press for Mode C operation. The SL70 is “on” and will transmit its squawk
code and altitude when interrogated.
VFR
Press VFR once to set the VFR squawk code. Press VFR a second time to
toggle between the VFR squawk code and the previously entered code.
HLD
Press to enable/disable altitude hold. The LED above the HLD button is
lighted when altitude hold is enabled.
Selecting a Squawk Code
The selected squawk code will always be in use. As you change a squawk
code, the original code will be sent until you are finished selecting the new
code. When changing a code, the display will stop flashing and selection is
stopped if the controls are not used for three seconds or more. Pressing any
pushbutton will also end code selection. The squawk code is automatically
reset to the VFR code when the SL70 is turned back on.
1. Rotate the LARGE knob clockwise one position. The first character of the
squawk code will flash.
2. Rotate the SMALL knob to the desired number for the first digit.
3. Rotate the LARGE knob to move the cursor to the next desired digit. Turn
the SMALL knob to select the desired number.
4. Repeat step 3 for each of the desired digits.
5. After the last digit is selected, rotate the LARGE knob clockwise one more
position. The display will stop flashing and the new code will be sent.
Special Squawk Codes
Special Squawk CodesSpecial Squawk Codes
Special Squawk Codes
1200 – Default VFR code in the USA.
7500 - Hijacking
7600 – Loss of communications
7700 – Emergency
See the Airman’s Information Manual for more information about squawk codes.
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