Linear Automobile Electronics ak 11 User Manual

AK-11  
Digital Keyless Entry System  
Installation and Programming Instructions  
(760) 438-7000  
USA & Canada (800) 421-1587 & (800) 392-0123  
Toll Free FAX (800) 468-1340  
 
COMPONENT LOCATIONS  
RED/GREEN  
POWER/ACCESS  
INDICATOR  
YELLOW  
"LOCKOUT"  
INDICATOR  
JUMPER JP2  
RESETS  
MASTER CODE  
TERMINAL  
BLOCK J3  
OUTPUTS  
NIGHT  
LIGHT  
JUMPER JP1  
REMOVE TO  
REDUCE  
TACTILE  
KEYPAD  
TERMINAL BLOCK J4  
POWER AND INPUTS  
BEEPER SOUND  
KEYLOCK  
Figure 1. Component Locations  
WIRING DIAGRAM  
TYPICAL GATE INSTALLATION WIRING  
TYPICAL DOOR INSTALLATION WIRING  
AK-11  
AK-11  
J3  
J3  
N.O.  
COMMON  
N.C.  
N.O.  
COMMON  
N.C.  
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
RELAY #1  
RELAY #1  
TO ALARM  
SYSTEM  
J4  
J4  
OUTPUT #3  
OUTPUT #4  
N.O.  
OUTPUT #3  
OUTPUT #4  
N.O.  
1
2
3
4
5
6
1
2
3
4
5
6
POWER  
POWER  
INHIBIT  
DOOR SENSE  
COMMON  
RELAY #2  
COMMON  
N.C.  
RELAY #2  
COMMON  
N.C.  
COMMON  
REQUEST-TO-ENTER  
EARTH GROUND  
REQUEST-TO-ENTER  
EARTH GROUND  
COMMON  
GROUND  
COMMON  
GROUND  
OPEN  
INHIBIT  
TIMER  
FIRE  
ACCESS  
ELECTRIC  
DOOR  
ALARM CONTACT  
STRIKE  
REQUIRED WIRING  
OPTIONAL WIRING  
AUXILIARY  
POWER  
OPEN  
TO ALARM  
SYSTEM  
POWER  
SUPPLY  
DOOR SWITCH  
GATE OPERATOR  
Figure 2. Wiring Diagram  
3
 
INSTALLATION  
To avoid damage to the unit from static discharges, connect the  
EARTH GROUND terminal to a good earth grounding point.  
Suggested wiring size is 18 AWG for earth ground and power (up  
to 500 feet of 18 AWG wire can be run for power, use larger wire  
for longer runs). Use 22 AWG or larger (depending on the load)  
for all other connections.  
PEDESTAL  
! CAUTION: If the unit is AC powered, and one side of the  
power transformer secondary is connected to earth  
ground, connect the grounded side to the “-” power  
terminal of the unit.  
Select a location for the keypad. For door access control  
installations, mount the keypad near the controlled door. For gate  
control installations, mount the keypad in clear view of the gate,  
but far enough from the gate so the user cannot touch the gate  
from the keypad.  
# WARNING: TO AVOID SERIOUS INJURY OR DEATH, MAKE  
SURE THAT THE UNIT IS FAR ENOUGH FROM THE GATE  
SO THAT THE USER CANNOT TOUCH THE GATE WHILE  
OPERATING THE KEYPAD. HOWEVER, THE GATE MUST  
BE FULLY VISIBLE FROM THE KEYPAD.  
MOUNT BACKPLATE WITH  
SECURITY BOLTS AND LOCKNUTS  
Figure 3. Pedestal Mounting Keypad Backplate  
Pedestal Mounting  
The AK-11 keypad can be mounted on a standard pedestal.  
Use four security bolts and locking nuts to secure the  
keypad’s backplate to the pedestal (see Figure 3).  
WALL MOUNTING  
Wall Mounting  
The AK-11 keypad can be mounted directly to a wall or flat  
surface.  
Use the appropriate fasteners to secure the keypad’s  
backplate to the mounting surface.  
When mounting the keypad to a concrete wall, use  
concrete wedge anchors or molly anchors (see Figure 4).  
USE CONCRETE  
WEDGE ANCHORS  
OR MOLLY ANCHORS  
Figure 4. Wall Mounting Keypad Backplate  
4
 
Gate Control  
Door Control  
Route four wires between the gate and the keypad (two for  
power, two for control).  
Install a low voltage electric door strike for unlocking the  
door.  
Connect the gate operator’s auxiliary or radio power output  
terminals to the keypads POWER input terminals (observe  
wiring polarity).  
Connect the gate operator’s OPEN terminals to the  
keypad’s Relay #1 COMMON & N.O. terminals.  
NOTE: For operator wiring specifics, refer to the gate  
operator’s wiring diagram.  
Choose a location for the power supply or transformer.  
Route two wires between the power supply and the  
keypad. Connect the power supply’s output terminals to  
the keypad’s POWER input terminals (observe wiring  
polarity).  
Route two wires between the door strike and the keypad.  
Connect one of the door strike wires to the keypad’s Relay  
#1 N.O. terminal. Connect the other door strike wire to the  
If a request-to-enter pushbutton or fire access keyswitch  
is going to be used, route two wires from the keypad to the  
normally open switch. Connect the wires to the normally  
open switch and to the keypad’s REQUEST-TO-ENTER  
and COMMON terminals.  
If an inhibit switch or timer is going to be used, route two  
wires from the keypad to the inhibit switch or timer relay.  
Connect the inhibit switch/timer terminals to the keypad’s  
INHIBIT and COMMON terminals.  
keypad’s POWER terminal. Connect a wire between the  
keypad’s POWER - terminal and the Relay #1 COMMON  
+
terminal.  
If a request-to-enter pushbutton or fire access keyswitch  
is going to be used, route two wires from the keypad to the  
normally open switch. Connect the wires to the normally  
open switch and to the keypad’s REQUEST-TO-ENTER  
and COMMON terminals.  
To use the door sense feature to detect forced entry or  
door ajar conditions, install a normally closed door switch  
on the door and route two wires from the switch to the  
keypad. Connect the door switch to the keypad’s DOOR  
SENSE and COMMON terminals.  
NOTE: If the INHIBIT input is going to be used, it must be  
programmed to select that input type. See the Programming  
Options section of this manual.  
If an inhibit switch or timer is going to be used, route two  
wires from the switch or timer to the keypad. Connect the  
inhibit switch/timer terminals to the keypad’s INHIBIT and  
COMMON terminals.  
NOTE: Either door sense or inhibit can be used. Both features  
cannot be used at the same time.  
DOOR  
SENSE  
SWITCH  
AK-11  
KEYPAD  
GATE  
OPERATOR  
(BEHIND GATE)  
2 WIRES  
FOR DOOR  
SENSE  
2 WIRES FOR  
REQUEST-TO-ENTER  
FIRE  
ACCESS  
KEYSWITCH  
AK-11  
KEYPAD  
2 WIRES  
FOR  
POWER  
2 WIRES FROM AK-11  
TO TRIGGER GATE OPEN  
2 WIRES FROM OPERATOR  
FOR AK-11 POWER  
FROM  
POWER  
SUPPLY  
ELECTRIC  
DOOR  
STRIKE  
2 WIRES  
FOR DOOR  
STRIKE  
Figure 5. Gate Installation  
Figure 6. Door Installation  
5
 
Setting Entry Code Length  
Default: 4 digits  
FACTORY DEFAULTS  
MASTER PROGRAMMING CODE. . . . . . . . . . . . . . . . . . . . 123456  
ENTRY CODE LENGTH . . . . . . . . . . . . . . . . . . . . . . . . . . 4 DIGITS  
REQUEST-TO-ENTER OUTPUT . . . . . . . . . . . . . . . . . . RELAY #1  
ALARM SHUNT OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . DISABLED  
FORCED ENTRY OUTPUT . . . . . . . . . . . . . . . . . . . . . OUTPUT #3  
DOOR AJAR OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . OUTPUT #4  
RELAY #1 ON TIME . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SECONDS  
RELAY #2 ON TIME . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SECONDS  
SOLID STATE OUTPUT #3 ON TIME . . . . . . . . . . . . 2 SECONDS  
SOLID STATE OUTPUT #4 ON TIME . . . . . . . . . . . . 2 SECONDS  
DOOR SENSE/INHIBIT INPUT. . . . . . . . . . . . . . . . DOOR SENSE  
KEYPAD LOCKOUT OUTPUT . . . . . . . . . . . . . . . . . . . . DISABLED  
KEYPAD ACTIVE OUTPUT . . . . . . . . . . . . . . . . . . . . . . DISABLED  
DOWNLIGHT ON-TIME. . . . . . . . . . . . . . . . . . . . . . . . . 2 MINUTES  
BEEPER SOUNDS WHEN KEY PRESSED . . . . . . . . . . . . . . YES  
BEEPER SOUNDS DURING RELAY #1 . . . . . . . . . . . . . . . . . . NO  
BEEPER SOUNDS DURING RELAY #2 . . . . . . . . . . . . . . . . . . NO  
BEEPER SOUNDS DURING OUTPUT #3. . . . . . . . . . . . . . . . . NO  
BEEPER SOUNDS DURING OUTPUT #4. . . . . . . . . . . . . . . . . NO  
KEYPAD LOCKOUT COUNT . . . . . 3 TRIES BEFORE LOCKOUT  
ANTI-PASSBACK TIME . . . . . . . . . . . . . . . . NO ANTI-PASSBACK  
Press: 0 3 Length  
#
#
Length = 1 - 6 for entry code length  
NOTE: If the Entry Code Length is going to be changed from  
the factory default of four digits, make this change first, before  
programming any entry codes.  
Adding a New Entry Code  
Press: 0 1 Code Code Action  
#
#
#
#
Code = The new entry code: 1-999999, depending on code length  
Action = Relay output entry code will activate as follows:  
1 = Relay #1, timed open  
2 = Relay #2, timed open  
3 = Both Relays, timed open  
10 = Relay #1, toggled  
20 = Relay #2, toggled  
30 = Both Relays, toggled  
12 = Relay #1 toggled; Relay #2, timed open  
21 = Relay #1, timed open; Relay #2 toggled  
The yellow LED will flash quickly while the AK-11 searches its  
memory for available space and duplicate entries. The green  
LED will light when the new code is stored.  
BASIC PROGRAMMING  
If the new entry code chosen is already being used for another  
entry code, the red LED will light. A new unique code needs to  
be entered.  
When the AK-11 is in programming mode, both LEDs will turn off  
until programming begins. After a programming option number  
is entered the yellow LED will blink. This indicates that the AK-11  
is ready to accept the new programming data. After the new data  
entry is complete, the green LED will light while the data is being  
stored. The red LED will light if any programming data is entered  
incorrectly, and the command will have to be fully re-entered.  
NOTE: Leading zeros (zeros before the code number, i.e.  
0001) do not need to be entered when programming a new  
entry code. The AK-11 will internally add any zeros to fill all  
digits determined by the entry code length setting. Leading  
zeros will have to be entered by the user when entering their  
code to gain access.  
Entering Programming Mode  
Erasing a Single Entry Code  
The 6-digit Master Programming Code (default = 123456) is used  
to enter Programming Mode.  
Press: 0 2 Code Code  
#
#
#
Code = The entry code to delete.  
Press:  
Master Code = the current 6-digit Master Programming Code  
9
Master Code  
# #  
The yellow LED will flash quickly while the AK-11 searches its  
memory for the code to erase. The green LED will light when the  
code is erased.  
Exiting Programming Mode  
Erasing All Entry Codes  
# WARNING: Performing this command will remove all entry  
codes from the memory.  
Press: * * #  
The red LED will light when Programming Mode is exited.  
NOTE: The AK-11 will automatically exit Programming Mode  
after two minutes of inactivity.  
Press: 9 7 0 0 0 0 0 0 0 0 0 0 0 0  
#
#
erased. This may take up to 15 seconds.  
#
NOTE: The green LED will light while the memory is being  
Re-entering a Command After a Mistake  
If the red LED lights, indicating an incorrect entry, or a wrong key  
is pressed during programming, to clear the keypad and re-enter  
the command:  
Changing the 6-Digit Master Programming Code  
Press: 9 8 Master Code Master Code  
#
#
#
Press:  
9
#
Master Code = The new 6-digit Master Programming Code  
*
New master code: _____________________  
6
 
Select Alarm Shunt Output  
Default: No Output  
PROGRAMMING OPTIONS  
Sets which output activates during the time access is granted. (Use  
this output to shunt alarm contacts attached to the access door.) This  
output may be timed or latched.  
Select Door Sense or Inhibit Input  
Default: Door Sense  
The input on terminal block J4, terminal #3 can be programmed  
for DOOR SENSE or INHIBIT.  
Press: 1 5 Output  
#
#
Output = Output to Activate (0-4)  
1 = Relay #1 2 = Relay #2 3 = Output #3,  
4 = Output #4 0 = No Output  
Press: 1 0 Input  
#
#
Input = 1 for Inhibit,  
= 0 for Door Sense  
Select Request-to-Enter Output  
Default: Relay #1  
Sets which output activates when the Request-to-Enter input is  
grounded. This output remains activated for at least the length of time  
specified by the On-times for the relays or outputs. If the  
Request-to-Enter input continues to be grounded beyond the time  
specified by the On-times for the relays or outputs, the output will  
remain activated as long as the Request-to-Enter input remains  
grounded.  
When programmed for DOOR SENSE, if an open condition on  
the input occurs before access is granted (with an entry code or  
with the request-to-enter input) a FORCED ENTRY output will  
occur. If an open condition remains 60 seconds after a relay  
activation for access, a DOOR AJAR output will occur.  
When programmed for INHIBIT, a closed condition on the input  
will prevent relay #1 from activating when access is requested  
(with an entry code). This mode is typically used with an external  
timer to disable the access device at certain times.  
Press: 1 6 Output  
#
#
Output = Output to Activate (0-4)  
1 = Relay #1 2 = Relay #2 3 = Output #3  
4 = Output #4 0 = No Output  
Select Forced Entry Output  
Default: Output #3  
Sets which output activates if the Door Sense input opens before  
access is granted. This output is not timed.  
Relay #1 On-time  
Sets the length of time Relay #1 activates when triggered.  
Default: 2 Seconds  
Press: 1 1 Output  
#
#
Press: 2 1 Seconds  
Output = Output to Activate (0-4)  
1 = Relay #1 2 = Relay #2 3 = Output #3  
4 = Output #4 0 = No Output  
#
#
Seconds = Output time in seconds (0-60)  
Relay #2 On-time Default: 2 Seconds  
Sets the length of time Relay #2 activates when triggered.  
Select Door Ajar Output  
Default: Output #4  
Sets which output activates if the Door Sense input stays open after  
access is granted. This output is not timed.  
Press: 2 2 Seconds  
#
#
Seconds = Output time in seconds (0-60)  
Press: 1 2 Output  
#
#
Output = Output to Activate (0-4)  
1 = Relay #1 2 = Relay #2 3 = Output #3  
4 = Output #4 0 = No Output  
Solid-state Output #3 On-time Default: 2 Seconds  
Sets the length of time Output #3 activates when triggered.  
Press: 2 3 Seconds  
#
#
Seconds = Output time in seconds (0-60) 99 = Toggle mode  
Select Keypad Lockout Output  
Default: No Output  
Sets which output activates when the keypad is “locked out” after too  
many incorrect entry code attempts. The lockout time is 60 seconds.  
Solid-state Output #4 On-time  
Sets the length of time Output #4 activates when triggered.  
Default: 2 Seconds  
Press: 1 3 Output  
#
#
Output = Output to Activate (0-4)  
1 = Relay #1 2 = Relay #2 3 = Output #3  
4 = Output #4 0 = No Output  
Press: 2 4 Seconds  
#
#
Seconds = Output time in seconds (0-60)  
99 = Toggle mode  
Select Keypad Active Output  
Sets which output activates when any keys are pressed. This output  
is timed.  
Default: No Output  
Set Downlight On-Time Default: 2 Minutes  
Sets the time duration that the downlight remains on after a key press.  
Press: 2 5 # Duration #  
Press: 1 4 Output  
#
#
0 = Always off 1 = 1 minute 2 = 2 minutes 3 = 3 minutes  
4 = 4 minutes 99 = Always on  
Output = Output to Activate (0-4)  
1 = Relay #1 2 = Relay #2 3 = Output #3  
4 = Output #4 0 = No Output  
7
 
Beep Sounds on Keystrokes  
Selects whether or not the keypad beeps as each key is pressed.  
Default: Yes  
Master Reset  
! CAUTION: Performing a master reset will clear the entire  
memory of the AK-11 and return all programmable options  
to the factory default values. ALL ENTRY CODES WILL BE  
ERASED.  
Press: 4 0 Sound  
#
#
Sound = 1 for Yes = 0 for No  
STEP 1 Disconnect power from the keypad.  
STEP 2 Press and hold down the  
STEP 3 Apply power to the keypad, continue holding the keys down  
until the red LED starts flashing.  
and  
keys.  
#
Beep Sounds During Relay #1  
Default: No  
Selects whether or not the keypad beeps during Relay #1 activation.  
*
STEP 4 Release the keys. The red and yellow LEDs will remain lit  
until the process is complete, then the yellow LED will go out.  
Press: 4 1 Sound  
#
#
Sound = 1 for Yes = 0 for No  
Resetting the Master Code  
STEP 1 Open the AK-11 case.  
STEP 2 Locate jumper JP2. This jumper is used to reset the master  
code.  
Beep Sounds During Relay #2  
Selects whether or not the keypad beeps during Relay #2 activation.  
Default: No  
STEP 3 With power applied to the keypad, remove jumper JP2. The  
keypad will begin to beep, signaling that the code has been  
reset.  
Press: 4 2 Sound  
#
#
Sound = 1 for Yes = 0 for No  
STEP 4 Replace jumper JP2.  
THE MASTER PROGRAMMING CODE IS NOW 123456.  
Beep Sounds During Output #3  
Selects whether or not the keypad beeps during Output #3 activation.  
Default: No  
Press: 4 3 Sound  
#
#
Sound = 1 for Yes  
= 0 for No  
Beep Sounds During Output #4  
Selects whether or not the keypad beeps during Output #4 activation.  
Default: No  
Press: 4 4 Sound  
#
#
Sound = 1 for Yes  
= 0 for No  
Keypad Lockout Count  
Default: 3 Tries  
Sets the number of incorrect entry code attempts allowed before the  
keypad “locks out”.  
Press: 5 0 Attempts  
#
#
Attempts = Number of attempts before lockout (2-7)  
Anti-passback Time Default: No Anti-passback  
Sets the length of time an entry code will not function after it is used.  
Press: 5 1 Minutes  
#
#
Minutes = Time in Minutes (1-4)  
0 = No Anti-passback  
8
 
Solid State Outputs  
Locking Keypad  
The two solid state outputs (Output #3 & Output #4) can be  
programmed to activate during various conditions. These  
outputs can be used to activate indicators or sounders. See  
Figure 7 for wiring examples using the solid state outputs.  
After the installation is complete. Lock the keypad using the  
keylock (see Figure 9).  
DC  
POWER  
SOURCE  
ELECTRONIC  
BEEPER  
1K  
2K  
Ω @ 12 volts  
Ω
@ 24 volts  
LED  
LED  
EACH  
OUTPUT  
100 mA  
MAXIMUM  
OUTPUT #3  
OUTPUT #4  
EXAMPLE 1: OUTPUT #3 LIGHTS AN LED,  
OUTPUT #4 LIGHTS AN LED AND SOUNDS A BEEPER  
HOOK KEYPAD  
ONTO BACKPLATE  
EACH  
OUTPUT  
100 mA  
MAXIMUM  
OUTPUT #3  
OUTPUT #4  
LOW VOLTAGE  
LAMP  
POWER  
SOURCE  
N.O. ZONE  
ALARM PANEL  
COMMON  
USE KEY TO  
LOCK KEYPAD  
END-OF-LINE  
RESISTOR  
COMMON  
GROUND  
Figure 9. Locking the Keypad Case  
EXAMPLE 2: OUTPUT #3 LIGHTS A LAMP POWERED FROM AN EXTERNAL  
SOURCE, OUTPUT #4 TRIGGERS A NORMALLY OPEN ALARM PANEL ZONE  
Figure 7. Using the Solid State Outputs  
Beeper Sound Level  
The keypad’s beeper can be set to low or high level.  
If the keypad’s beeper is too loud for the keypad’s location,  
remove jumper JP1 (see Figure 8).  
REMOVE JUMPER JP1 TO REDUCE  
THE SOUND LEVEL OF THE BEEPER  
Figure 8. Removing Beeper Jumper  
9
 
AK-11 OPERATION  
Users of the AK-11 have up to 40 seconds to key in  
their entry code.  
Up to eight seconds are allowed between each  
keystroke.  
All digits of the entry code must be entered. Example:  
If the code is 0042, the user must enter “0 0 4 2”.  
If the wrong key is pressed, pressing the  
key will  
*
reset the keypad. The correct code can then be  
re-entered.  
After a correct code is entered, the red LED will turn  
green and the programmed relay will activate for the  
programmed time.  
If the number of incorrect codes entered exceeds the  
keypad lockout count, the yellow LED will light,  
indicating that the keypad is locked out. The lockout  
will remain for one minute.  
After a valid code has been entered, it will be  
unusable until the anti-passback time expires.  
YELLOW LED WILL LIGHT  
DURING KEYPAD LOCKOUT IF  
TOO MANY INCORRECT CODES  
ARE ENTERED  
RED LED TURNS  
GREEN WHEN  
ACCESS IS GRANTED  
PRESS STAR KEY TO  
RESET KEYPAD IF THE  
WRONG KEY IS PRESSED  
USERS HAVE UP TO  
40 SECONDS TO ENTER  
THEIR COMPLETE CODE  
Figure 10. Operating AK-11  
10  
 
MANAGER’S ENTRY CODE LOG  
NAME  
ADDRESS OR APARTMENT NUMBER  
ENTRY CODE  
RELAY NUMBER  
1 Timed  
2 Timed  
1 Toggled 2 Toggled  
1 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
1 Timed 2 Timed  
1 Toggled 2 Toggled  
2 Timed  
11  
 
LINEAR LIMITED WARRANTY  
FCC NOTICE  
This Linear product is warranted against defects in material and  
workmanship for twenty-four (24) months. The Warranty  
Expiration Date is labeled on the product. This warranty  
extends only to wholesale customers who buy direct from  
Linear or through Linear’s normal distribution channels. Linear  
does not warrant this product to consumers. Consumers  
should inquire from their selling dealer as to the nature of the  
dealer’s warranty, if any. There are no obligations or liabilities  
on the part of Linear LLC for consequential damages  
arising out of or in connection with use or performance of  
this product or other indirect damages with respect to loss of  
property, revenue, or profit, or cost of removal, installation, or  
reinstallation. All implied warranties, including implied warranties  
for merchantability and implied warranties for fitness, are valid only  
until Warranty Expiration Date as labeled on the product. This  
Linear LLC Warranty is in lieu of all other warranties express  
or implied.  
Changes or modifications not expressly described in this manual  
or approved by the manufacturer could void the user’s authority  
to operate the equipment.  
This equipment has been tested and found to comply with the  
limits for a Class B digital device, pursuant to Part 15 of the FCC  
Rules. These limits are designed to provide reasonable  
protection against harmful interference in a residential  
installation. This equipment generates, uses and can radiate  
radio frequency energy and, if not installed and used in  
accordance with the instructions, may cause harmful  
interference to radio communications. However, there is no  
guarantee that interference will not occur in a particular  
installation. If this equipment does cause harmful interference to  
radio or television reception, which can be determined by turning  
the equipment off and on, the user is encouraged to try to correct  
the interference by one or more of the following measures:  
° Reorient or relocate the receiving antenna.  
All products returned for warranty service require a Return  
Product Authorization Number (RPA#). Contact Linear Technical  
Services at 1-800-421-1587 for an RPA# and other important  
details.  
° Increase the separation between the equipment and  
receiver.  
° Connect the equipment into an outlet on a circuit  
different from that to which the receiver is connected.  
° Consult the dealer or an experienced radio/TV  
technician for help.  
Copyright ©2007 Linear LLC  
227975 A  
 

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