Linear Satellite Radio D 22C User Manual

The D-22C transmitter contains two 8-position dipswitches, one  
for each pushbutton. The transmitter can be used with two  
single-channel receivers or one multi-channel receiver.  
CAUTION: All Standard Digital transmitters and receivers should be  
recoded prior to installation and operation.  
In order to avoid the possibility of duplicating codes in adjacent  
systems, factory set codes should not be used. In addition, among  
the valid codes available, four others should not be used. These  
include: all switches set ON or OFF and switches set in an  
alternating ON/OFF or OFF/ON pattern.  
The D-22C will transmit as long as a pushbutton is pressed.  
Depending on conditions (interference, obstacles and distance to the  
receiver) the receiver output may or may not stay activated for as  
long as the transmitter is sending a signal.  
CAUTION: If using two receivers, be sure they are located at least 10 feet  
apart.  
TRANSMITTER DESCRIPTION  
The D-22C is a two-button, two-channel hand-held digital radio  
transmitter with independent button coding. The transmitter can  
perform a variety of remote switching tasks when used with any of  
Linear’s Standard Digital “D” Series Receivers. Typically the  
D-22C is used in wireless or hybrid wireless/hardwire security  
systems.  
The transmitter is powered by a 9-volt battery. Pressing either  
button will send that button’s unique code. Press either button  
for at least 2 seconds to activate the transmitter. The red LED  
on the face of the transmitter will glow as the unit transmits and  
the receiver with the matching digital code will activate.  
A snap-on plastic transmitter clip with a screw and double-stick  
tape for mounting the transmitter are provided with the unit.  
The Standard Digital radio format provides up to 256 different  
digital codes. The code is set using the 8-position coding switches  
in the transmitter and receiver(s).  
D-2 2 C  
DIGITAL  
TRANSMITTER  
Co d e Se tting  
Instruc tio ns  
(760) 438-7000 FAX (760) 438-7043  
USA & Ca na d a (800) 421-1587 & (800) 392-0123  
To ll Fre e FAX (800) 468-1340  
STEP 1 Locate coding switches. The code switch for the left  
button can be accessed by removing the battery access door  
located on the back of the transmitter case. To access the code  
switch for the right button, the unit’s rear cover must be removed.  
Identify the coding switches and note that they have eight  
positions, with ON and OFF clearly marked.  
STEP 2A Coding for single-channel receivers. Pick two valid  
OFF/ON codes and set them on switches 1-8 on each coding  
switch in the transmitter. Set each receiver’s coding switch 1-8 to  
match the code set for the proper button in the transmitter.  
STEP 2B Coding for two-channel receivers. Pick one valid  
OFF/ON code and set it on switches 3-8 in the receiver. Match the  
same code on switches 3-8 on both switches in the transmitter.  
Set both the transmitter switches 2 to OFF. Set one transmitter  
switch 1 to OFF and the other switch 1 to ON. 2-Channel receiver  
switches 1 & 2 are unused and can be set in any position.  
CODING SWITCHES IN  
D-22C TRANSMITTER  
CODING SWITCHES  
IN TWO RECEIVERS  
SET  
1-8  
MATCH  
1-8  
REMOVE BATTERY DOOR  
TO ACCESS LEFT BUTTON  
CODING SWITCH  
TO ACCESS THE RIGHT BUTTON  
CODING SWTICH, REMOVE THE  
CASE SCREW AND BACK OF CASE  
CODING SWITCHES IN  
D-22C TRANSMITTER  
CODING SWITCHES  
IN TWO-CHANNEL RECEIVER  
LEFT  
RECEIVER #1  
ACTIVATES FROM  
LEFT BUTTON  
BUTTON  
CODING  
SWITCH  
MATCH  
3-8  
LEFT  
EXAMPLE  
3 & 6 ON  
EXAMPLE  
3 & 6 ON  
BUTTON  
CODING  
SWITCH  
RECEIVER  
SET  
3-8  
CHANNEL #1  
ACTIVATES FROM  
LEFT BUTTON  
EXAMPLE  
3 & 6 ON  
SWITCH 1 OFF  
MATCH  
1-8  
SET  
1-8  
RIGHT  
BUTTON  
CODING  
SWITCH  
RECEIVER #2  
ACTIVATES FROM  
RIGHT BUTTON  
MATCH  
3-8  
RECEIVER  
CHANNEL #2  
ACTIVATES FROM  
RIGHT BUTTON  
EXAMPLE  
3 & 6 ON  
EXAMPLE  
2, 3, 6 & 7 ON  
EXAMPLE  
2, 3, 6 & 7 ON  
RIGHT  
BUTTON  
CODING  
SWITCH  
EXAMPLE  
3 & 6 ON  
SWITCH 1 ON  
LEFT BUTTON  
CODING SWITCH  
STEP 3 Test the equipment. Connect the receiver to its power  
source. With relay output receivers, listen for the relay click when  
the transmitter is activated. A multi-meter can be used to detect  
activation of relay and solid state output receivers. Operate the  
transmitter from various locations to determine the radio range.  
BATTERY REPLACEMENT  
LINEAR LIMITED WARRANTY  
This Linear product is warranted against defects in material and workmanship for twelve (12) 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 corporation 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 Corporation Warranty is in lieu of all other  
warranties express or implied.  
The battery should last 12 to 18 months with normal use. When  
the red LED lights dimly, or not at all when transmitting, the battery  
needs to be replaced. Remove the battery access door to change  
the battery. Any type of 9-volt battery can be used. Replace the  
battery door and foam battery pad when finished.  
DCV  
DCV  
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.  
IMPORTANT !!!  
REPLACE BATTERY WITH  
FRESH 9-VOLT BATTERY  
Linear radio controls provide a reliable communications link and fill an important need in portable wireless  
signalling. However, there are some limitations which must be observed.  
MEASURE  
RESISTANCE  
MEASURE  
VOLTAGE  
MEASURE  
VOLTAGE  
For U.S. installations only: The radios are required to comply with FCC Rules and Regulations as Part 15  
devices. As such, they have limited transmitter power and therefore limited range.  
A receiver cannot respond to more than one transmitted signal at a time and may be blocked by radio signals  
that occur on or near their operating frequencies, regardless of code settings.  
Changes or modifications to the device may void FCC compliance.  
Infrequently used radio links should be tested regularly to protect against undetected interference or fault.  
A general knowledge of radio and its vagaries should be gained prior to acting as a wholesale distributor or  
dealer, and these facts should be communicated to the ultimate users.  
POWER  
NORMALLY  
OPEN  
POWER  
COMMON  
OUTPUT  
OUTPUT  
SHORT  
-TO-  
COMMON  
OUTPUT  
RECEIVER  
RELAY  
OUTPUT  
RECEIVER  
VOLTAGE  
OUTPUT  
RECEIVER  
Copyright © 1997 Linear Corporation  
200857 C  
 

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