Linx Technologies CMD-HHLR Series User manual

OEM CONFIGURATIONS
With a one-time NRE and minimum
order, Linx can configure the
keypad and label areas to meet
your specific requirements. Contact
Linx for details.
OEM LONG-RANGE HANDHELD TRANSMITTER DATA GUIDE
CMD-HHLR-xxx
DESCRIPTION
The Linx HHLR Remote Command
Unit is ideal for general purpose
remote control and command appli-
cations. This unit has been pre-
certified for FCC Part-15 compliance
which reduces costs and time to
product introduction. Available in 315,
418 or 433.92MHz (418MHz
standard), this compact handheld
remote is capable of a 300+ft.
transmission range. The transmitter
unit can be configured with 1-8 buttons
and the keypad and labeling can be
modified to meet specific customer
requirements. Selectable addressing
provides security and allows the
creation of up to 1024 distinct
transmitter-receiver relationships. The
transmission can be decoded using a
matching Linx function module, KH
Series module, or a Linx LC or LR
Series receiver paired with a decoder
IC or microcontroller. The unit operates
from a single 3-volt lithium cell.
0.60"
0.20"
1.375"
2.81"
1.61"
2.00"
1.35"
R 0.2"
■General Remote Control
■Keyless Entry
■Garage / Gate Openers
■Lighting Control
■Call Systems
■Home / Industrial Automation
■ Wire Elimination
APPLICATIONS INCLUDE
Physical Dimensions
Revised 10/20/03
PART # DESCRIPTION
CMD-HHLR-***-xxx 8-Button Handheld Transmitter
EVAL-***-HHLR HHLR Evaluation System
*** = 315, 418 (Standard), 433.92 MHz
xxx = Color Leave blank for standard Black
WHT = White CGY= Gray CBL = Blue
CRE = Red CPU = Purple
ORDERING INFORMATION

Page 5
CMD-HHLR BUTTON ASSIGNMENTS
This diagram illustrates the relationship between the button locations and
encoder/decoder data lines.
D7 D6
D5 D4
D3 D2
D1 D0
Page 2
THEORY OF OPERATION
The CMD-HHLR-xxx Remote Command Unit combines the popular Linx LC
Series transmitter and an antenna with a commonly available encoder IC to form
a simple yet effective RF remote-control transmitter. When a button is activated
on the remote unit, power is applied to the internal circuitry and the encoder IC
is enabled. The encoder then detects the logic states of the DIP-switch address
and button data lines. These states are then formatted into a 3-word transmission
cycle which continues until the button is released. The encoder data is used to
modulate the transmitter that, through the antenna, conveys the data into free
space. The transmitted signal may be received by any Linx LC, LR or KH Series
receiver or pre-made function module. Once data is received, a decoder IC or
custom microcontroller is used to check the transmitter's address bits against the
address settings of the receiving device. If a match is confirmed, the decoder’s
output(s) are set to replicate the transmitter’s button status.
SETTING THE TRANSMITTER ADDRESS
In order to allow the formation of up
to 1024 unique Transmitter-Receiver
relationships, the transmitter’s
address may be selected using
internal DIP switches as shown. The
switches are accessed by removing
the DIP-switch access cover.
Note: If the switch is on, the address line is
connected to ground, otherwise it is floating.
The receiver's address must match in order for
the units to communicate.
CONTENTION CONSIDERATIONS
It is important to understand that only one transmitter at a time can be activated
within a reception area. While the transmitted signal consists of encoded digital
data, only one carrier of any frequency can occupy
airspace without contention at any given time.
BATTERY REPLACEMENT
The remote unit utilizes a CR-2032 Button Lithium Cell.
In normal use it will provide 1-2 years of operation.
Access for replacement is accomplished by removing the
battery access cover by pressing down firmly on the label
area and sliding it off. Once the unit is open, remove the
battery by sliding it from beneath the holder. Replace the
cell with the same type while observing the polarity
shown.
Battery Access
+
ADDRESS
A0 = 1
A1 = 2
A2 = 3
A3 = 4
A4 = 5
A5 = 6
A6 = 7
A7 = 8
A8 = 9
A9 = 10
OFF ON

Page 5Page 4
COMPLIANCE REQUIREMENTS
The CMD-HHLR-xxx has been pre-certified by Linx for FCC Part-15 compliance
when used with an appropriate function module in keeping with the applications
allowed under section 15.231.
LABELING/INSTRUCTION REQUIREMENTS
The CMD-HHLR-xxx Remote Command Unit has already been labeled in
accordance with FCC regulations in effect as of the date of this document. No
further labeling of the unit is needed; however, it is necessary to include the
following statement in the end product’s instruction manual or insert card.
INSTRUCTION TO THE USER
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.
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.
This equipment has been certified to comply with the limits for a Class
B computing device, pursuant to FCC Rules. In order to maintain
compliance with FCC regulations, shielded cables must be used with
this equipment. Operation with non-approved equipment or unshielded
cables is likely to result in interference to radio and TV reception. The
user is cautioned that changes and modifications made to the
equipment without the approval of manufacturer could void the user's
authority to operate this equipment.
Place the above statement in the instruction manual or insert card.
HHLR Assembly

Page 6
750 ohm
R3
ANTENNA
ANT1
GND
GND
GND
GND
GND
VCC
SW-USMT-10
S1
11 10
12
13
14
9
8
7
15
16
17
6
5
4
18
19
20
3
2
1
HT-640
U1
24
VCC 23
D0 22
A9 21
A8 20
A7 19
A6 18
A5 17
A4 16
A3 15
A2 14
A1 13
A0
12 GND
11 OSC2
10 OSC1
9TE
8DOUT
7D7
6D6
5D5
4D4
3D3
2D2
1D1
DPAK-X2
U5
4
3 2
1
DPAK-X2
U4
4
3 2
1
DPAK-X2
U2
4
3 2
1
DPAK-X2
U3
4
3 2
1
VCC
100K
R2
CR2032
B1
SM1
9
COM
8
SW8
7
SW7
6
SW6
5
SW5
4
SW4
3
SW3
2
SW2
1
SW1
VCC
LCTX
TX1
TX-XXX-LC
8
GND 7
VCC 6
GND 5
RFOUT
4IADJ/GND
3GND
2DATAIN
1GND
390K
R1
VCC
HHLR Schematic
Page 7

Page 8
LINX TECHNOLOGIES, INC.
575 S.E. ASHLEY PLACE
GRANTS PASS, OR 97526
PHONE: [phone]
FAX: [phone]
http://www.linxtechnologies.com
U.S. CORPORATE HEADQUARTERS:
Linx Technologies is continually striving to improve the quality and function of its products; for
this reason, we reserve the right to make changes without notice. The information contained in
this Data Sheet is believed to be accurate as of the time of publication. Specifications are based
on representative lot samples. Values may vary from lot to lot and are not guaranteed. Linx
Technologies makes no guarantee, warranty, or representation regarding the suitability or
legality of any product for use in a specific application. None of these devices is intended for use
in applications of a critical nature where the safety of life or property is at risk. The user assumes
full liability for the use of product in such applications. Under no conditions will Linx Technologies
be responsible for losses arising from the use or failure of the device in any application, other
than the repair, replacement, or refund limited to the original product purchase price. Some
devices described in this publication are patented. Under no circumstances shall any user be
conveyed any license or right to the use or ownership of these patents.
Disclaimer
© 2003 by Linx Technologies, Inc. The stylized
Linx logo, Linx, and “Wireless made Simple”
are the trademarks of Linx Technologies, Inc.
Printed in U.S.A.