WIRELESS MADE SIMPLE
®
MS COMPACT HANDHELD TRANSMITTER DATA GUIDE
DESCRIPTION
The Linx OTX-***-HH-CP8-MS Compact
Handheld Transmitter is ideal for general-
purpose remote control and command
applications. This unit has been pre-certified
for FCC Part 15, Industry Canada, and
European CE (433MHz only) compliance,
reducing costs and time to market. Available
in 315, 418 (standard), or 433.92MHz, this
compact remote has a transmission range of
up to 750 feet when combined with an LR or
LT Series module. The transmitter unit can
be configured with 1 to 8 buttons and the
keypad and labeling can be modified to meet
specific OEM customer requirements. Ease
of use and security are dramatically
enhanced by an on-board MS Series
encoder, which allows instant creation of up
to 16,777,216 (2
24
) unique addresses
without cumbersome DIP switches or cut
traces. When paired with an MS Series
decoder, transmitter identity can be
determined and button permissions
established. The unit uses a single 3V
CR2032 lithium button cell.
R 0.2"
2.00"
2.81"
1.35"
1.62"
0.20"
0.60"
Figure 1: Package Dimensions
2
3
ON
1
O
FF
Ligh
ts
O
N
ON
D
O
FF
Poo
l
Spa
ON
O
FF
O
N
4
C
A
B
ON
FASCO
O
N
FEATURES
FCC, Canada, and CE pre-certified
1 to 8 buttons
Small package
Customizable keypad
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.
APPLICATIONS INCLUDE
General Remote Control
Keyless Entry
Garage / Gate Openers
Lighting Control
Call Systems
Home / Industrial Automation
Wire Elimination
ORDERING INFORMATION
PART #
DESCRIPTION
OTX-***-HH-CP8-MS-xxx MS Compact Handheld Transmitter
MDEV-***-HH-CP8-MS HH-CP8 Master Development System
*** = 315, 418 (Standard), 433.92MHz
xxx = Color Leave blank for standard Black
Revised 1/28/08
ELECTRICAL SPECIFICATIONS
Parameter
POWER SUPPLY
Operating Voltage
Supply Current
Power-Down Current
TRANSMITTER SECTION
Transmit Frequency Range:
OTX-315-HH-CP8-MS
OTX-418-HH-CP8-MS
OTX-433-HH-CP8-MS
Center Frequency Accuracy
ENVIRONMENTAL
Operating Temperature Range
–
–
Designation
V
CC
I
CC
I
PDN
F
C
–
–
–
-50
-40
315
418
433.92
–
–
–
–
–
+50
+85
MHz
MHz
MHz
kHz
°C
–
–
–
–
1
Min.
2.1
–
–
Typical
3.0
3.4
5.0
Max.
3.6
–
–
Units
VDC
mA
nA
Notes
–
–
1
SETTING THE TRANSMITTER ADDRESS
The MS Compact Handheld Transmitter
allows the selection of one of
MODE_IND Window
24
) unique addresses. All
16,777,216 (2
transmitters are supplied set to the
same address. To avoid contention with
other units or to create unique
relationships, the address can be
changed. This is accomplished by using
CREATE Button
a paper clip or probe to press the
CREATE button on the board through
the hole in the back of the case. Press
the button and a LED will light up in the
Figure 2: CREATE Button Access
MODE_IND window, indicating that the
address is being created. The address will be randomized for as long as the
button is held down. Release the button and the randomized address will be
saved and the LED will begin flashing to indicate that the Control Permissions
may now be set. Press the buttons that the transmitter will have the authority to
access. Press the CREATE button with the paper clip again or wait 17 seconds
for it to time out. The address and Control Permissions are now set. The decoder
will need to learn the address before it will accept any transmissions. Please see
the Typical Applications section of this data guide or the MS Series Decoder
Data Guide for details.
Notes
1. Characterized, but not tested
THEORY OF OPERATION
The OTX-***-HH-CP8-MS Compact Handheld Transmitter combines an LR
Series transmitter and an antenna with an on-board MS Series encoder to form
a simple, yet highly reliable RF remote-control transmitter. The LR Series
transmitter is a low-cost, high-performance synthesized ASK / OOK transmitter.
The transmitter’s synthesized architecture delivers outstanding stability and
frequency accuracy, while minimizing the effects of antenna port loading and
mismatching. This reduces or eliminates frequency pulling, bit contraction, and
other negative effects that are common to SAW-based transmitter architectures,
providing a significantly higher level of performance and reliability.
When a button is pressed on the transmitter, power is applied to the internal
circuitry and the encoder is enabled. The encoder then detects the logic states
of the button data lines. These states are formatted into a 2-word transmission
cycle which continues until the button is released. The encoder data is used to
modulate the transmitter which conveys the data into free space through the
antenna. Once data is received, a decoder IC is used to check the transmitter’s
address against an address saved in memory. If a match is confirmed, the
decoder’s outputs are set to replicate the transmitter’s button states. These
outputs can then be used to activate external circuitry required by the
application.
The transmitter is compatible with the LT and LR product families. For
applications where range is critical, the LR Series receiver is the best choice due
to its outstanding sensitivity. When the transmitter is combined with an LR Series
receiver and an MS Series decoder, ranges of up to 750 feet are possible.
Applications operating over shorter distances will also benefit from the increased
link reliability and superior noise immunity provided by the LR Series receiver.
OTX-***-HH-CP8-MS BUTTON ASSIGNMENTS
This diagram illustrates the relationship between the button locations and
encoder data lines.
D6
D4
D2
D0
D7
D5
D3
D1
Figure 3: OTX-***-HH-CP8-MS Button Assignments
Page 2
Page 3
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 particular frequency can occupy airspace without
contention at any given time. If two transmitters are activated in the same area
at the same time, then the signals will interfere with each other and the decoder
will not see a valid transmission, so it will not take any action.
COMPLIANCE REQUIREMENTS
The OTX-***-HH-CP8-MS has been pre-certified by Linx Technologies for FCC
Part 15 and Industry Canada RSP-100 compliance. The 433.92MHz version has
also been tested for CE compliance for use in the European Union. The 315MHz
and 418MHz versions are not legal for use in Europe.
LABELING / INSTRUCTION REQUIREMENTS
The OTX-***-HH-CP8-MS Compact Handheld Transmitter has already been
labeled in accordance with FCC, Industry Canada, and CE 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 for FCC compliance. Industry Canada only
requires the shaded portion. The EU does not require a statement.
BATTERY REPLACEMENT
The remote unit utilizes a standard CR2032 lithium
button cell. In normal use, it will provide 1 to 2 years of
operation. To replace the battery, remove the access
cover by pressing firmly on the label area and sliding it
off. Once the unit is open, remove the battery by sliding
it from beneath the holder.
There may be the risk of explosion if the battery is
replaced by the wrong type. Replace it with the same
type of battery while observing the polarity shown in
the adjacent figure.
+
Battery Access
INSTRUCTION TO THE USER
This device complies with Part 15 of the FCC Rules.
Operation of this device is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference
that may cause undesired operation.
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.
Figure 4: Battery Access
ASSEMBLY DIAGRAM
418MHz
FCC ID: OJM-OTX-XXX-CPMSA
IC: 5840A-CPMSXXXA
Figure 5: OTX-***-HH-CP8-MS Assembly
Page 4
Page 5
TYPICAL APPLICATIONS
The signal sent by the MS Long-Range Transmitter can
be received by an LR Series receiver module or the LT
Series transceiver module. The outstanding sensitivity
of the LR Series receiver offers the best range when
used with a Linx OEM transmitter. The receiver module
is then connected directly to an MS Series decoder,
which will decode the transmitted signal.
When a button is pressed on the transmitter, a
corresponding line on the decoder will go high. This can
then be connected to external circuitry to perform
whatever function is required by the application.
The decoder must learn the transmitter’s address
before they can work together. This is done by taking
LICAL-DEC-MS001
the LEARN line on the decoder high, typically with a
pushbutton switch. The MODE_IND line will start switching (if a LED is attached,
this will cause it to flash) indicating that the decoder is in Learn Mode. Press any
of the buttons on the transmitter to initiate a transmission. Take the LEARN line
high again to exit Learn Mode and the system will be ready for use. The figure
below shows a schematic for a typical application.
The MS Long-Range Transmitter
is set to 9,600bps, so
SEL_BAUD0 should be tied high
and SEL_BAUD1 tied low.
The decoder has several unique
features, such as Latch Mode,
Receiver Control, and TX_ID.
If the LATCH line is tied to V
CC
,
the outputs will go high on the
first transmission, then low on
the second. Figure 6 shows it
tied low, so the outputs will be
momentary (high for as long as a
signal is received that instructs
the decoder to make them high).
VCC
9
8
7
6
5
4
3
2
1
SM1
COM
SW8
SW7
SW6
SW5
SW4
SW3
SW2
SW1
RXM-***-LR
VCC
ANT1
SPLATCH
ANTENNA
4
3
4
4
4
GND
3
DPAK-X2
3
DPAK-X2
3
DPAK-X2
U2
DPAK-X2
U3
U4
U5
100k
1
2
1
2
1
1
2
2
R2
100k
R4
1
2
3
4
5
6
RFIN
GND
GND
GND
GND
GND
100k
R5
100k
R6
100k
R7
100k
R8
100k
R9
100k
R10
100k
R11
TX1
GND
GND
GND
D1
LED
VCC
The TX_ID line will output a number associated with the originating transmitter /
encoder. Application Note AN-00156 shows how to use this feature.
Data guides for the receivers, the MS encoder, and the MS decoder can be
found on the Linx Technologies website at www.linxtechnologies.com.
Page 6
Figure 7: OTX-***-HH-CP8-MS Schematic
Page 7
VCC
GND
The RX_CNTL line can be
220
connected to the PDN line of the
LICAL-DEC-MS001
GND
receiver and the decoder will
GND
activate the receiver with a 10%
duty cycle This greatly reduces
Figure 6: LR Receiver and MS Decoder Schematic
the average current consumption
of the system. The adjacent figure shows it tied to ground, but to use this feature,
connect the RX_CNTL line of the decoder directly to the receiver’s PDN line.
1
2
3
4
5
6
7
8
9
10
D6
D7
SEL_BAUD0
SEL_BAUD1
GND
GND
LATCH
RX_CNTL
TX_ID
MODE_IND
D5
D4
D3
D2
VCC
VCC
D1
D0
DATA_IN
LEARN
20
19
18
17
16
15
14
13
12
11
Set
For FCC
Compliance
R13
LICAL-ENC-MSHS
RXM-LR
1
2
3
GND
GND
4
TXM-XXX-LR
LADJ/VCC
GND
U1
D6
D5
D7
D4
SEL_BAUD
D3
SEL_BAUD1/HS_GND
D2
GND
VCC
GND
VCC
KEY_IN/MS_GND
D1
TX_CNTL
D0
DATA_OUT
SEND
MODE_IND
CREATE_ADDR
DATA IN
1
2
3
4
5
6
7
8
NC
NC
NC
GND
VCC
PDN
RSSI
DATA
ANT
GND
NC
NC
NC
NC
NC
NC
16
15
14
13
12
11
10
9
GND
Learn
VCC
VCC
R1
100k
S1
GND
GND
GND
RF OUT
PDN
GND
VCC
4.7uF
10pF
C2
C3
GND
R23
100k
R12
100k
B1
BAT-LINX2032
VCC
C1
4.7uF
GND
GND
VCC
GND
VCC
R3
200
GND
VCC
8
7
6
5
GND
WIRELESS MADE SIMPLE
®
U.S. CORPORATE HEADQUARTERS
LINX TECHNOLOGIES, INC.
159 ORT LANE
MERLIN, OR 97532
PHONE: (541) 471-6256
FAX: (541) 471-6251
www.linxtechnologies.com
Disclaimer
Linx Technologies is continually striving to improve the quality and function of its products. For this reason,
we reserve the right to make changes to our products without notice. The information contained in this
Overview Guide 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. "Typical" parameters can
and do vary over lots and application. Linx Technologies makes no guarantee, warranty, or representation
regarding the suitability of any product for use in any specific application. It is the customer's responsibility
to verify the suitability of the part for the intended application. NO LINX PRODUCT IS INTENDED FOR USE
IN ANY APPLICATION WHERE THE SAFETY OF LIFE OR PROPERTY IS AT RISK.
Linx Technologies DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. IN NO EVENT SHALL LINX TECHNOLOGIES BE LIABLE FOR ANY OF
CUSTOMER'S INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY FROM ANY DEFECTIVE
OR NON-CONFORMING PRODUCTS OR FOR ANY OTHER BREACH OF CONTRACT BY LINX
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adjustments, costs, and expenses incurred by Linx Technologies as a result of or arising from any Products
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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. Devices described in this publication may contain
proprietary, patented, or copyrighted techniques, components, or materials. Under no circumstances shall
any user be conveyed any license or right to the use or ownership of such items.
© 2008 by Linx Technologies, Inc. The stylized Linx logo,
Linx, “Wireless Made Simple”, CipherLinx, and the stylized
CL logo are the trademarks of Linx Technologies, Inc.
Printed in U.S.A.
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