RAE Systems RM900A RAEMesh Radio (RM900A) User Manual SU3RM900A
RAE Systems, Inc RAEMesh Radio (RM900A) SU3RM900A
User Manual
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| Document ID | 1623154 |
| Application ID | JVP7J08j+iK2nlS+VcjOfg== |
| Document Description | User Manual |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 331.36kB (4142013 bits) |
| Date Submitted | 2012-01-18 00:00:00 |
| Date Available | 2012-01-18 00:00:00 |
| Creation Date | 2011-12-16 11:23:41 |
| Producing Software | GPL Ghostscript 8.70 |
| Document Lastmod | 2011-12-16 11:23:41 |
| Document Title | SU3RM900A_User Manual |
| Document Creator | PDFCreator Version 1.0.2 |
| Document Author: | jkong |
Revision: Dec, 2011
RAEMesh Radio User Manual
(for RM2400, RM900, RM900A…)
RAE Systems Inc
Revision: Dec, 2011
Introduction
The RAEMesh Radio module offers a complete microcontroller/transceiver solution Containing all hardware features
necessary for development of a low data-rate, low-power wireless application. The primary components include an IEEE
802.15.4 compliant Zigbee-ready transceiver , a microcontroller, a 40-pin interface connector, a MMCS antenna
connector,
This documentation describes the RAEMesh radio module hardware interface as well as RAE System’s Command
Interface.
Hardware
Specifications
Frequency Band
802.15.4 standard.
RM2400:16 channels of operation in the 2.4GHz world wide ISM band. 5MHz
channel spacing.
RM900: 11 channels. 868, 906,908……924MHz
RM900A: 11 channels. 868, 906,908……924MHz
Power
+3.3V + .3V from carrier board, 3.0V to 3.6V from battery pack
Interfaces
40-pin surface-mount 2x20 1.27mm pitch
RF
250kbps OQPSK Direct Sequence Spread Spectrum.
Dimensions
46.5 mm x 26 mm x 10 mm
Antenna Interface
50-Ohm MMCX female
Operating Temperature Range
-40ºC to +85ºC
Indicators
Two LEDs, one red, one blue (DS1, DS2)
Current Consumption
0.5 µA Sleep
120 mA TX @ 18 dBm
25 mA RX / Idle
RF receive sensitivity
-100dBm at at 1% packet error rate for a 20 byte payload.
Data Rate
250 kbps
Antenna
Omnidirectional antenna, 3.5dBi max
Revision: Dec, 2011
Mechanical Size
Top View
The height of the shielding box is 4.3mm from the PCB.
40 Pin header (1.27mm) is used for board to board connection. Corresponding mate connector can be JVE
22P8702-40M00B-01G-4.5
Revision: Dec, 2011
Pin Layout
Pin
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Description
DGND
nRESET
TXD1
RXD1
GPIO0
GPIO1
GPIO2
GPIO3
TEMP_E/GPIO4
WakeUp/GPIO5
BUZZER/GPIO6
GPIO7/PS_DIR
BUTTON0/GPIO8
BUTTON1/GPIO9
GPIO10
RF_SO
RF_SI
RF_CK
SFD
+3.3V
Pin
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
Description
DGND
DGND
TXD0/Bootload.
RXD0
GPIO/LED2
GPIO/LED3
GPIO/LED4
GPIO/LED5
GPIO/PS_CS
GPIO/PS_FRAME
+3.3V
AGND
AREF
ATEMP/ADC1
ADC2
TCK
TMS
TDO
TDI
+3.3V
Revision: Dec, 2011
Firmware
The module is pre-loaded with the bootloader, which supports serial bootloading of firmware update. The
module contains RAEMesh application and comply with the RAE System’s RCS protocol. The module also has
built-in RAEMesh Module Command Interface(RMCI).
This documentation is focused on the instruction on RMCI interface.
The RMCI command interface allows customer to easily access to low level mesh functionality without pain to
develop the firmware. The module can be configured to a GTW to hook up to a getaway or just a stand alone
regular full function node or a Sleepy reduce function node.
Make sure to configure the module to right mode before using.
Quick Start
UART
Via the TXD1 and RXD1 pins the command interpreter can be accessed. The RCM can buffer up to 128 bytes of incoming
data in a software FIFO buffer and uses XON/XOFF flow control. See the datasheet of the Atmel ATmega1281 for more
information about the build-in UART.
Connect Pin5 (TXD1) and Pin7 (RXD1) to the customer board. Use the following settings for serial port.
RTR and STD: 19200bps, 8N1.
GTW: 38400bps, 8N1.
Data Packet
RCM will transmit any data in the { }, all data in the {} will be transparently sent out without radio’s interpretation. The
maximum data packet is 50 bytes including {}.
The data in the {} can be any characters including ‘{‘ ‘}’ ’[‘ ’]’ .
The interval between 2 data packets must be >200ms for RTR and GTW.
The interval between 2 data packets must be >1s for STD.
Wakeup
If the radio is set to STD mode, the Wakeup pin Pin19 (PE7) is used to make the radio asleep and wakeup. A constant
high on this pin will let the radio go to the sleep mode and a low level signal on this pin will wake-up the radio.
The Radio sleep mode is the power save mode so the power consumption can be very low. (<40uA)
The Wakeup pin must be held up to 10ms before sending a data packet.
Power
Ground: Pin1, Pin2 and Pin4.
VCC: Pin39, Pin40. 3.0V or 3.3V
Radio consumes less than 100mW in normal RX/TX mode.
Radio consumes 600mW at TX and 100mW at RX for High power module
Heartbeat
Connect Pin12 to a LED for heartbeat indicator.
Reset
RST: Pin3 Active Low.
Revision: Dec, 2011
PC communication
Please has your serial port debug software installed on the PC. For example: sscom32.exe
Microsoft Hyper Terminal is not recommended for this application because it is not good to send characters and
commands in Hex.
Base on correct setting and connection, you will see following display on your screen when power is applied.
GTW:
[%A]RAEMESH-II RM900A 16MHz
FwVer:V1.02b on Sep 28 2011 09:52:14
Stack: BC1.10.0
Type: Coordinator/Gateway
Band: 915
EUI: 0001002400001005
Channel: 0x10
TxPwr: Medium
PanId: 0x03E5
RTR:
[%A ]RAEMESH-II RM900A 16MHz
FwVer:V1.02b on Sep 28 2011 09:52:14
Stack: BC1.10.0
Type: FFD/Router
Band: 915
EUI: 0001002400001005
Channel: 0x10
TxPwr: Medium
PanId: 0x03E5
STD
[%A ]RAEMESH-II RM900A 16MHz
FwVer:V1.02b on Sep 28 2011 09:52:14
Stack: BC1.10.0
Type: RFD Sleep Sensor
Band: 915
EUI: 0001002400001005
Channel: 0x10
TxPwr: Medium
PanId: 0x03E5
Revision: Dec, 2011
RAEMesh2 Module Command Interface
Format:
SOP
Byte:
Length
Command Code
Command Data
0~n
EOP
Byte Number
Name
Comment
SOP
Radio Protocol beginning of packet. This is always ‘[‘ (0x5B)
Length
Total length of packet + 0x20, include ‘[‘ and ‘]’.
Command Code
0x20 ~ 0xFF. Excluding:0x5A~0x5F and 0x7A~0x7F. 0xF0~0xFF are
reserved for common commands.
Even for packet sent from SDTE or RDTE to RCM.
Odd for packet response from RCM to SDTE or RDTE.
Command Data
…
…
N+3
EOP
Hex
Radio protocol end of packet.. This is always ‘]’(0x5D)
The minimum length for one packet is 4 bytes long. The Length is 0x20 based. E.g. the total length of a packet without
command data is 4, the Length byte is 0x20 + 4 = 0x24.
The SDTE or RDTE always initiate the communication with Radio module (RRCM, SRCM). Radio Module responses to
the command it received.
The Command Code for packet sent from SDTE or RDTE to Radio module is even, the response from Radio module to
SDTE or RDTE is 1 higher than the command code.
Command Data can be empty.
No command for 0x5A~0x5F and 0x7A~0x7F.
A Section 0xF0~0xFF is reserved for common commands such as help, Version etc.
Caution: the maximum packet length from SOP to EOP is 64 bytes.
Notes:
1.
2.
3.
4.
5.
All commands response in 50ms
Check RCM’s information when turn on the radio. Command: 5B 24 60 5D.
Wait at least 5s for RCM to finish the initialization after power on.
Check the network status of the STD before sending the data for first time. Command: 5B 24 20 5D.
It is recommend to add 1s interval between 2 data packets for STD. Check 0x5b 24 27 5d for sending
acknowledge with successfully. There is no ACK for transmission failed.
6. For STD, if there is no network, the RCM will automatically wake up every 10 minute to search for a new network.
It can be interrupted any time. RCM will keep in asleep if it has joined a network.
Command List of RMCI
5B 24 20 5D = Get network status
5B 24 50 5D = Join or form network by scan.
5B xx 26 dd dd 7B .. .. 7D 5D = Send massage in unicast
5B
5B
5B
5B
5B
5B
5B
5B
24
24
24
24
24
24
24
24
2A
3A
60
6C
68
7B
40
4C
5D
5D
5D
5D
5D
5D
5D
5D
Get Radio Type
Get device application type
Get Radio's UID, channel, PANID
Get Application's UID, channel, PANID
Get parent Network ID
Get Last Hop Link Quality (LQI)
Get reset reason.
GET_FWVERSION
5B 24 30 5D = Enable GTW function
5B 24 32 5D = Enable RTR function
5B 24 46 5D = Enable STD function
5B 24 4A 5D = Restore the radio to factory setting
5B 25 34
America,
5B 25 A0
5B 24 A2
5B 25 A4
5B 24 A6
5B 25 3C
minimum)
5B 26 44
5B 2C 4E
5B 25 AC
5B 24 AE
5B 25 B0
5B 24 B2
xx 5D = Set channel number, xx( 0x00 for EURO, 0x01-0x0A for North
0x0B-0x1A for ISM)
xx 5D = Enable receiver while idle on STD.
5D = Get receiver on/off on STD.
xx 5D = Set region.
5D = Get region.
xx 5D = Set Tx power, xx(0xFF for maximum, 0x80 for middle, and 0x00 for
xx
xx
xx
5D
XX
5D
xx 5D = Set PanId, xxxx(0x0000-0x03E7)
xx xx xx xx xx xx xx 5D = Set MAC/UID address
5D = SET_CMDBATCH
= GET_CMDBATCH
5D = SET_PMTJOIN, permit or forbid any joining attempt.
= GET_PMTJOIN
5B 24 3E 5D = Leave current network
5B 26 42 xx xx 5D = Set routing discovery interval
5B 24 52 5d = Get routing discovery interval
5B 24 38 5D = Report node’s position
5B 24 48 5D = Soft reset
5B 24 56 5D = Access into bootloader
5B 25 FE xx 5D = Set print debug info, xx(00-disable; 01-enable)
For Internal Use Only
• Command Sets
Command Name
Effect
Area
CMD
Code
CMD
Data
(bytes)
None
Response
CMD Code
0x21
Response
CMD
Data(Bytes)
STATUS(1)
DestNw
kID(2)
RCS
Pack(x)
0x27
None
None
0x2B
NETWORK_STATU Both
Use on:
GTW
RTR
STD
0x20
SEND_MSG_UNI RM
Use on:
GTW
RTR
STD
GET_MODULE_TY Both
PE
Use on:
GTW
RTR
STD
0x26
GTW_ENABLE
Both
0x30
None
0x31
None
Use on:
GTW
RTR
STD
RTR_ENABLE
Both
0x32
None
0x33
None
Use on:
GTW
RTR
STD
CHG_RRCM_CHA Both
Use on:
GTW
RTR
0x2A
Description
Return the radio’s network status
0x00: NO NETWORK
0x02: JOINED NETWORK.
Host controller or instrument
should call it periodically with
certain duty cycle to check the
network status.
Send message in unicast mode.
NwkAddr: Network address
Message must in RCS format.
Type(1)
Return the radio’s type.
Type:
0: Bluetooth
1: coRE3-433MHz
2: coRE3-868MHz
3: coRE3-915MHz
4: ZcoRE3-2400
5: UART to Ethernet
6: UART to RS485
7: RM2420
8: RM900
9: Reserve
10: RM2400
11: coRE1-433MHz
12: coRE1-868MHz
13: coRE1-915MHz
14: coRE2-433MHz
15: coRE2-868MHz
16: coRE2-915MHz
17: coRE6-2.4GHz
Set the radio as a GTW so that
the radio can be use on a
Gateway device.
Baud rate change to 38400 8N1
Reset automatically.
Set radio to RTR. Always on and
has router function.
Baud rate change to 19200 8N1
Reset automatically.
0x34
Channel
Number
(1)
0x35
For Internal Use Only
None
Requests change radio channel
to specified channel. Meanwhile,
specified channel should be
compliance with radio region
setting.
STD
0x00 for RM900 if region is
BAND_868_EU.
0x01 to 0x0A total 10 channels
for
RM900
if
region
is
BAND_915_NA.
0x0B to 0x1A total 16 channels
for
RM2400
if
region
is
BAND_2400_ISM.
RPT_LOCATION
Use on:
GTW
RTR
STD
GET_APPTYPE
Use on:
GTW
RTR
STD
Both
0x38
None
0x39
None
Both
0x3A
None
0x3B
AppType(1)
SET_TX_POWER Both
Use on:
GTW
RTR
STD
0x3C
TxPwr(1
0x3D
None
LEAVE_NETWORK Both
Use on:
GTW
RTR
STD
RST_REASON
Both
Use on:
GTW
RTR
STD
0x3E
None
0x3F
None
0x40
None
0x41
Reason(1)
For Internal Use Only
If channel number is not
compliance with radio region, do
not return response CMD.
Reset automatically.
Print node’s network information
in ASCII.
Get application type.
AppType:
1 – GTW;
2 – RTR;
3 – Reserved;
4 – STD;
5 – Reserved;
other - invalid
Set modem transmission power
level.
For RAEMeshII
0xFF – maximum level,
0x80 – middle level,
0x00 – minimum level,
For RAEMesh
Power setting from 0xE3(-25dBm)
to 0xFF(0dBm).
Reset automatically.
Leave the current network.
Below just list RAEMeshII reset
reason,
0x00 = UNKNOW,
0x01 = RESET_ EXTERNAL,
0x02 = RESET_ POWERON_,
0x03 = RESET_ WDT,
0x04 = RESET_BROWNOUT,
0x05 = RESET_JTAG,
0x06 = RESET_WARM,
SET_ROUTEINTER RMII
VAL Use On:
RTR
CHG_PAN_ID
Use on:
GTW
RTR
STD
STD_ENABLE
Use on:
GTW
RTR
STD
SOFT_RESET
Use on:
GTW
RTR
STD
FACTORY_RST
Use on:
GTW
RTR
STD
SET_RECEIVER
Use on:
STD
Both
0x42
0x44
Type(1)
Interval(
1)
PanID:(
2)
XXXX
0x43
0x45
None
None
Type(1)
Bit7~bit2: reverse,
Bit1: enable route discovery
immediately if set,
Bit0: set route discovery
interval with the value of
Interval(1).
Interval(1)
Routing interval, range is
from 10 to 240, unit is second.
If RTR/Router lost connection
with its next hop, it should route
discovery periodically as per the
value of Interval(1).
Change GTW Pan ID into XXXX.
From 0x0001 to 0x03E7(1-999)
Reset automatically.
Both
0x46
None
0x47
None
Both
0x48
None
0x49
None
Put a node into STD. Interrupt
enable and active low.
Baud rate change to 19200 8N1
Reset automatically.
Perform soft reset.
Reset automatically.
Both
RMII
0x4A
0xA0
None
00
Disable
01
Enable
0x4B
0xA1
None
None
Restore the RCM to factory
defaults.
PanId: 0x03E7, Device Type:
STD.
For RM2400, channel is 0x0f and
txpower is -6dBm and 17dBm
through power amplifier.
For RM900, TBD
Debug print is disable.
STD receiver is disable.
GTW or RTR permit joining is
enable.
Reset automatically.
Enable or disable STD’s receiver.
STD should receive data packet
from parent if enable receiver;
STD should use poll to request
data packet from parent if disable
receiver.
Reset automatically.
For Internal Use Only
GET_RECEIVER
Use on:
STD
SET_REGION
Use on:
GTW
RTR
STD
RAEMeshII
0xA2
None
0xA3
Status(1)
RAEMeshII
0xA4
Region(
1)
0xA5
None
GET_REGION
RAEMeshII
Use on:
GTW
RTR
STD
SET_UID
RAEMeshII
Use on:
GTW
RTR
STD
JION_FORM_NET Both
WORK
Use on:
GTW
RTR
STD
GET_ROUTEINTE
RVAL
Use on:
RTR
GET_NODE_INFO
Use on:
GTW
RTR
STD
GET_APPNODE_I
NFO
Use on:
GTW
RTR
STD
GET_PARENT_ID
Use on:
RTR
STD
0xA6
None
0xA7
Region(1)
0x4E
UID(8)
0x4F
None
0x50
None
0x51
None
Return STD receiver’s status,
00 – Disable
01 - Enable
Region(1)
BAND_868_EU = 0x01,
BAND_915_NA = 0x04,
BAND_2400_ISM = 0x08,
For RM2400, this command is
useless because RM2400 always
work on BAND_2400_ISM.
For RM900, default channel is
0x00
if
set
region
to
BAND_868_EU; default channel
is 0x06 if set region to
BAND_915_NA.
Reset automatically.
Get modem setting of region.
Set radio’s UID(MAC address).
Note:
The last two bytes must not set
to 0x0000, 0xFFF0-0xFFFF
Reset automatically.
GTW: Form a network using
customized PANID to allow the
other nodes to join.
RTR/STD: Search the network
using customized PANID and try
to join the network.
Return the routing interval.
RAEMeshII
0x52
None
0x53
Interval(1)
Both
0x60
None
0x61
UID(8)
Channel(1)
Power(1)
PAN ID(2)
Get the node information: UID,
Channel, Txpower level,, PAN ID,
Both
0x6C
None
0x6D
UID(8)
Channel(1)
Power(1)
PAN ID(2)
Both
0x68
None
0x69
Parent radio
ID(8)
Get the application information:
UID, Channel, Power, PAN ID. If
the network is not connected, the
GET_NODE_INFO will return
wrong information, and then use
this to get what we set.
0x00 00 00 00 00 00 00 00
means that STD or RTR’s parent
is coordinator/gateway.
0x00 00 00 00 00 00 mm nn
means STD or RTR’s parent is a
RTR which short address is mm
For Internal Use Only
nn.
0x00 00 00 00 00 00 ff fe means
that STD or RTR do not have
parent.
Get RSSI percent, the higher, the
better.
Best: 240
Worst:0
RTR get next hop rssi;
STD get parent rssi.
Set display debug information
enable/disable.
The default setting is disabled.
LAST_HOP_RSSI Both
Use on:
RTR
STD
0x7B
None
0x7C
RSSI(1)
SET_DEBUG_PRIN Both
Use on:
GTW
RTR
STD
GET_FWVERSION Both
Use on:
GTW
RTR
STD
0xFE
00,Disa
ble
01,Enab
le
0xFF
None
0x4C
None
0x4D
Fw Version
and
Build
Time[30]
SET_CMDBATCH RAEMeshII
Use on:
GTW
RTR
STD
0xAC
00,
Disable
01,
Enable
0xAD
None
GET_CMDBATCH RAEMeshII
Use on:
GTW
RTR
STD
SET_BOOTLOADE Both
Use on:
GTW
RTR
STD
SET_PMTJOIN
RMII
Use on:
GTW
0xAE
None
0xAF
00,
Disable
01,
Enable
0x56
None
0x57
None
Make modem into bootloader
mode and wait for new app
image.
0xB0
0x01,
enable;
0x00,
disable
0Xb1
None
0xb2
None
0xb3
0x01,
enable;
0x00,
disable
This command can disable or
enable Coordinator or RTR’s join
network permission. If modem
disable joining permission, it
forbid any modem joining attempt.
Return status that whether
modem permit joining network
attempt from RTR or STD
GET_PMTJOIN
Use on:
GTW
RMII
Return fw version and build time,
for example
[BMv1.00
Feb
14
2011
10:11:11], this mean fw version is
V1.00 and build is on Feb 14
2011 10:11:11.
Enable or disable command
batch function. If enable, modem
will not reset automatically after
change panid, channel, power,
eui, region ， receiver and join
permission. They will take effect
after reset manually.
Batch function will disable after
reset.
Return
command
batch
configuration.
Caution: RCM will save corresponding command data of AT command into its persist data server if this
command cause “Reset automatically”, it will take effect after reset.
For Internal Use Only
• RMII Command Classification
There are a lot of RMCI command set in this manual, different application need different command, below is a
table that which command must have, which are recommend and which are optional.
Table 2 Command Classification
MUST HAVE
RECOMMENED
OPTIONAL
ITEM
GET_MODEM_TYPE
FACTORY_RST
CMDS GET_APPTYPE
NETWORK_STATUS
SET_TXPOWER
GET_APPNODE_INFO
RST_REASON
GTW_ENABLE
SEND_MSG_UNI
RTR_ENABLE
SET_UID
STD_ENABLE
SET_REGION
SET_PANID
SET_RECEIVER
JOIN_FORM_NETWORK
LEAVE_THE_NETWORK
SET_CHANNEL
GET_PARENT_ID
LAST_HOP_RSSI
For Internal Use Only
SET_DEBUG_PRINT
Procedure for Radio Core Setting:
A. Configure
Software: AVRUSB V2.0.2.231
Hardware: AVRUSB Programmer and RAEMeshII Dev board.
1. Make sure the correct hardware selected
2. Click “Reset”. If a green label is at bottom of AVRUSB framework, go to next step.
For Internal Use Only
3. Erase target MCU
4. Read out current fuse setting
For Internal Use Only
5. Check the following setting.
For Internal Use Only
6. Write back Fuse setting if any changes made, make sure program successfully.
B. Firmware Upgrade
1. Select firmware file, *.srec
2. Select correct com port
3. Click “Program”, then Reset RAEMesh2 module in 30 seconds
4. Waiting for program successful
For Internal Use Only
Terms
GTW: A RTR used for gateway. Only one GTW per network.
RTR: Full Function Device. Sensor node with routing ability. RTR requires line power all time.
STD: Reduce Function Device. A Sleeping node can only talk to a RTR or GTW. Can not relay the message. Can be a
battery powered device.
RCM :Radio Communications Module
RDTE: Reader Data Terminal Equipment.
RMCI: RAEMesh Module Command Interface.
SDTE : Sensor Data Terminal Equipment.
Reference
Atmel: www.atmel.com
FCC: www.gcc.gov
Zigbee Alliance: www.zigbee.org
Disclaimer
Product and Company names and logos referenced may either be trademarks or registered trademarks of their respective
companies. We reserve the right to make modifications and/or improvements without prior notification. All information is
correct at time of issue. RAE Systems does not convey any license under its patent rights or assume any responsibility for
the use of the described product.
Warnings
FCC Notifications:
Compliance Statement (Part 15.19)
This device complies with part 15 of the FCC rules. Operation is subject to the following two
conditions:
1. This device may not cause harmful interference received, including interference
that may cause undesired operation.
2. This device must accept any interference received, including interference that may
cause undesired operation.
Warning (Part 15.21)
Changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
This device must be operated as supplied by Raesystems. Any changes or
modifications made to the device can be jeopardize, but there is one
exception. The radio’s antenna can be replaced as long as the specification of the
antenna matches the original.
Information for the OEMs and integrators
This device is intended for OEM integrators only. Please see the full Grant of Equipment document for
restrictions. This device must be operated and used with a locally approved access point.
For Internal Use Only
Label information to the End User by the OEM or integrator
If the FCC ID of this module is not visible when it is installed inside another device, then the outside of the
device into which the module is installed must be labeled with “Contains FCC ID: SU3RM900A” in a visible
area.
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.
For Internal Use Only
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