M P H SWS-K90XMIT Safety Warning System User Manual 8

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Document ID	45913
Application ID	y63Fen37Vc9xgMf3U5VHFA==
Document Description	8
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Permanent Confidential	No
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Document Type	User Manual
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Filesize	18.8kB (234949 bits)
Date Submitted	1999-07-06 00:00:00
Date Available	2000-03-03 00:00:00
Creation Date	2001-06-09 13:12:51
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-06-09 13:12:52
Document Title	8

SWSm TRANSMITTER USER'S GUIDE
Revision 4/19/99
{0 r
VEHICLE MOUNTED MOBILE TRANSMlTTERS
by
MPH INDUSTRIESA INC
310 E 9TH STREET
OWENSBORO, KY 42303
PRODUCT DESCRIPTION:
Your transmitter is commercial grade electronic equipment intended for mobile operation
It contains a state-of-the-art Digital Signal Processor and microwave hardware equivalent
to that found in modern police radar units. It has a tough UV protected moisture sealed
polycarbonate radome, a weather tight power connector, and a corrosion resistant
aluminum base It will operate in an ambient temperature of-35 to +65 Celsius It can be
powered from the unconditioned battery voltage (ll - I6 VDC, negative ground).
Typically it will be mounted external to the passenger compartment ofthe vehicle, in a
light bar for instance, and will be active when powered, It does not require operator
controls and is normally powered only when the light bar is active (normally when it
would be used). Installation ot'tlte transmitter can be done by personnel qualified to install
electrical equipment on emergency vehicles (i e radios. light bars. sirens. etc )
The transmitter is being licensed under Part 00 ofthe FCC regulatrons It may be
mounted on a law enforcement vehicle (federal. state. local), a utility vehicle (light. water.
phone. etc). a road maintenance vehicle (paint stripe. road patch. etc). an emergency
vehicle (fire. ambulance. etc ). school bus. or road hazard vehicle (wrecker. wide load,
slow moving \ehicle, etc ) The transmitters are pr‘eprogrammed at the factory with one of
the 64 message codes The message codes for moving or stationary mode may be
reprogrammed in the field with an optional programming cable Return the transmitter to
the factory for repairs There are no user serviceable parts inside
When powered, the transmitter will transmit a message to a motorist's SWSN receiver,
alening the driver ofsome traffic situation as described in the "Radar Safety Warning
Transmitter/Receiver Standard “ published by the Georgia Tech Research Institute A
signal proportional to the moving speed is available on the tachometer output ofthe
transmitter when it is powered atrd the transmitter"s internal software determines that it is
moving The vehicle speed cant be displayed on an optional display that will be available in
the near future Following is a message subset ofthe transmitter standard. which is used
for some specific applications
POLICE
When the transmitter establishes that it is moving at a speed over IS MPH it will
transmit a “Police in Pursuit“ message code 62 When stationary or moving at a speed
less than 15 MPH, it erI transmit a "Stationary Police Vehicle Ahead" message code
13 The alarm function is not active rn this mode ot‘operation,
EMERGENCY
When the transmitter establishes that it is moving at a speed over IS MPH. it will
transmit art "Emergency Vehicle In Transtt“ message code bl When stationary or
moving at a speed less than I5 MPH. it nil] transmit a “Stationary Emergency Vehicle
Ahead“ message code 31. The alarm function is not active in this mode ofoperation
SCHOOL BUS
The school bus application does not have a movrng mode and does not display vehicle
speed on the tachometer output lt is powered when the loading/unloading bus lights
are activated and transmits the “School Bus Loading/unloading“ message code 28
regardless of bus velocity The alarm option may be enabled in this application to
warn the driver offast approaching targets (it assumes the bus is stationary and all
detected movement is a target) The receive sensitivity and alarm speed threshold may
be adjusted to optimize the alarm for specific installations on future units
WORK ZONE”
When the transmitter establishes that it is moving at a speed over 10 MPH. tt will
transmit a "Slow Moving Vehicle" message 64 When stationary or moving at a speed
less than lO MPH‘ it will transmit a “Work Zone Ahead“ message code I .
Mobile transmitter applications not listed above can be accommodated (ice, utility etc)
but have not been establtshcd at the tinte ofthis publication Transmitter functions for
additional applications will be added irt future publications ofthis guide
In addition to field configuration, future features include user settable parameters. The
transmitter has a built in digital signal processing radar that is tracktng targets or the
moving speed during the intcrxal between transmit messages One ol'tlte future features
ot'the transmitter is to activate an alarm output ifa target moving over the settable
threshold is detected This alartn could give road maintenance crews or school bus driver
a “heads up" warning ot'a speeding motorist for example
TNSTALLATlON:
Mountin"
Mounting ofthe transmitter is accomplished by securing the trattsmitter base (as outlined
in figure I) to a horizontal surface on the vehicle witlt rte screws through the four
mounting holes The transmitter can be mounted upside down or right side up. but should
be oriented so that the transmitter beams, as indicated by the directional arrows on the
label. are hroadca v to the from and rear ofthe vehicle It should also be mouttted as
high upon the vehicle as possible and in a place that metal obstacles (emergency lights‘
sirens‘ etc ) are not directly tn the path ofthe beams If possible. the base should be
mounted to a metal lteat sinking frame (such as the light bar frame) to help maintain the
base at a constant temperature
Heat Sir ing Consideratio
The thermal resistance ot a transmitter to still an“ ts 2.8 Celsius/Watt (without a heat
sink) The power cortsuntption ofthe transmitter is about 10 Watts so that the
temperature rise ofthe transmitter would be typically 29 Celsius above the surrounding
air. lftlte transmitter is mounted on stand-oil‘s or non-heat sinking surfaces. care should
t.
be taken to tnsure that the transmitter temperature does not exceed +65 Celsius during
it
operation For example: Still air inside a light bar might go as high as 45 Celsius in direct
sunlight on a hot summer day. lfthe transmitter were operated Without a heat sink for a
long period ot‘time‘ it would reach a temperature ol‘28 + 45 Celstus or 73 Celsius which
would be outside the operating limits On the other hand, it'the transmitter was mounted
t.
where the ambient air never exceeded 37 Celsius, it could be mounted without a heat
it
sink. Since the transmitter will operate down to -35 Celsius and will generate its own
heat while in operation, the cold temperature environment should not pose a mounting
problem, except in the extremely cold climates.
Power Connection/Cable Installation
The transmitter is supplied with a power cable that comes in 0 ti. I2 ft 15 ft. and 20 it
lengtlts. One end ofthe cable has a connector that connects to the transmitter‘ and the
other end is wired into the vehicle’s wiri g harness, The red wire is the positive (+) power
lead and goes to a switched +l2V source sttch as the voltage supplying the emergency
lights, the transmitter being active when power tppiied The black wire connects to the
battery negative (-) terminal (frame ground) The transmitter base is also connected to the
black lead, so care should be taken to insure that the vehicle frame is negative ground if
the transmitter base is mounted on the vehicle frame REVERSING THE POWER
LEADS WILL CAUSE FAILURE UPON APPLICATlON OF THE VOLTAGE The
transmitter draws approximately 0 75 amps when in operation and has an internal M
replaceable 2A slow blow Fuse t‘or wiring harness protection in case ot‘a short or the
application ol’rcverse polarity
The green and white Wires are used fora tachometer diflerential output and are used with
an optional display not supplied with the units The green wire is the tach (+) signal. the
white wire is the inch (-) signal These are high impedance signals that should only be
used with the display designed specifically for them.
The alarm output wire is blue it is an open collector optoisolator type ot‘output that has
a high impedance to Frame ground when inactive and Will sink up to lOO m.—\ to Frame
ground when the alarm is active Typically, the alarm signal would dri\e a 12 VDC power
relay to operate a warning light or buzzer to alert the driver When using an inductive
load on the alarm output {such as a relay coil) a protection diode ot‘sntlicient current
rating should be installed reversed biased acro s the coil This is done to protect the
optoisolator output transistor from the inductive "kick“ voltage when the power is
removed.
General vehicle electrical equipment safety installation practices should be observed
Cable wires not used in the installation should be taped so that they do not short out
against each other or ground The * I 2 VDC supplying the transmitter should be
adequately fused to protect the transmitter cable from overheating in the event it gets
shoned to the frame
_., 37m 77 _
JSin 4 Sm
__ ,,,, "n." , ._
on u. m
I \,
SWS TRANSMITTER FOOTI’RINT
Hum-RN] lc“
uh i197
FIGURE I
TRANSMITTER CONNECTOR PIN DEFINITION
Guide Key
| 7 PIN DESIGNATION
I : I'lI'IIJIiIiIISI.‘
3 N I 3: mm UNI)
x: ALARMUUI
i JZIIIIIIRI usr
_, 5: IAL‘IIHI
n: mam»)
7=1>wu UNI)
le'wn wwnu
FIGURE 2
FIELD PROGRAMMABILITY
The SWS transmitter can send any oflhe 64 preset messages listed in this document and
as defined iii the “Radar Safety Warning Transmitter/Receiver Standard Version 3.0"
The safety messages are categorized into moving or stationary types and have a number
assigned to them (l464). In operation, the transmitter senses whether it is moving or
stationary and sends the appropriate message The transmitter comes programmed with a
pair of messages for moving and stationary operation. but can be reprogrammed in the
field by the user‘ if desired Once the messages are setwrogramming they are
permanently clranfled and will remain until they are repro‘rrammed (no default setting)
The switching parameters (speed at which it switches. etc i are preset at the factory and
cannot be reprogrammed in the field at present. This feature and other programmable
features such as the alarm will be released at a future date
INPUT TERMINAL
A special cable adapter assembh is required to interface the SWS transmitter with an
“R523?~ type ofterminal for programming. The adapter assembly has a female 9 pin "D-
Sub” connector with the following pin s :nal definitions. Pin 3 RS 2 output signal, Pm
5: Signal ground, Pins 1, 2. 4, 6-0 no connection The adapter assembly also has a
“cigarette lighter“ +l2 volt DC input power connector that is used to power the SWS
transmitter and its adapter two. as well as a connector for the SWS transmitter
The terminal may be free standing or terminal emulation software cart be used on a PC
with a programmable serial interface. etc The SWS transmitter does not have to be
removed front its vehicle mount to be reprogrammed A batter}t powered terminal or
“laptop" can be taken to the which: in which the transmitter is mounted and used with the
cable adapter to reprogram the transmitter The cable adapter is temporarily attached to
the transmitter itt place ofits power cable While programming, the transmitter is
powered tltrough the adapter (which is connected to the vehicle's Cigarette lighter plug)
Afier programming the transmitter power cable is reconnected
The terminal should be configured with local echo so that the programmer can see what
characters have been sent to the transmitter In most cases the terminal should be
configured to output each character as it is entered and output only the character that is
entered (watch out for automatic litre feed with carriage returns) The terminal can be used
iii a "block" mode, that is send out a line or block ot'characters that has been entered upon
the execution ofa carriage return or other command‘ however, command sequences
(terminated wrth art enter key) should not be enter ed faster than once a second
The required terminal communications configuration is defined heltm
TERMINAL COMMUNICATIONS CONFIGURATION
RSZ32 ASCII output (ittput is not used), 0600 band, 8 bits, I stop bit. no parity, no
hardware handshake
(t
PROGRAMMING MESSAGES.
With a terminal connected as described above. the transmitter moving and stationary
messages can be programmed Other programmable transmitter options will be available
in the future. but at this point have not been implemented. Programming is done by
entering a three-character command with its parameter enclosed iit rectangular brackets.
The command characters are not case sensitive (doesn‘t matter ifthey are capitalized)
The carriage return character (enter key) is used to enter a command. A series of carriage
return characters can be used to set the transmitter in tlte programming mode initially or to
reset it in the programming mode tfan error was made while programming. No provision
has been made for backspace or error correction. The “STO” command is used to store
the programming into the nonvolatile memory and place the transmitter back into normal
operation
A list of programming commands and the parameters for each ofthem can be found in
table I. Note that the mess uc commands are the only ones available at present. Table 2
contains a numerical ordered list ot‘the mes ges that can be programmed mm the
transmitter
Following are some example programming sequences Characters contained in the "< >“
characters destgnate a key entry, for example  means a carriage return keystroke.
The < > symbols themselves are not entered
EXAMPLE 1

SMC[24}
MMC[25]
STO
When the transmitter is first powered. it comes up in the normal transmit mode. Two
carriage returns () must he entered to get the attention olithe device, causing it to
stop transmitting and go into the programming mode In the above example afler
entering the programming mode the stationary message code number 24 was set with the
SMC[24] command and the moving message code number 25 was set with the SM(‘[25]
command. The settings were saved into permanent eeprom memoty with the STO
command and the transmitter resumed normal operation (goes out ofthe programming
mode).
EXAMPLE 2

MMC[25]
STO
In the above example. the moving message code was set to 25 The stationary message
code was unchanged and remains the same as before programming The transmitter
resumed normal operation after the STO command
TABLE 1 1 rograrn Commands & Parameters v
Programmable Feature Command Parameter Default
Stationary message code SMC l to 64 None
Moving message code MMC I to 64 None
Stationary me 56: tcxl SMT* up to 64 characters T not used
Movint:y message text MMT“ up to 64 characters not used
Moving message algorithmr MMA“ I to '7 '7
Moving message speed MMS" 2010 SO 7
fits UN1* KPH or MPH MPH
Store eeprom (end prog) STO none n/a
* unimplemented at this point
TABLE 2 Message Codes and Categories
Category 1 {Highway Construction or Maintenance:
1) Work Zunc Ahead
2) Road Closed Ahead/Folk)“ Dclmu’
3) Bridge Closed Ahead/Fallon Delmu’
4) Higlma} Work thus Ahead
5) Utill|_\ Work Crchs Ahead
6) All Tral‘fic Folk)“ Detour Ahead
7) All Trucks Fnllmt Delonr Ahead
R) All Tml'fic E\|1Ahcad
9) Right Lanc Closed Ahead
10) Center Lauc Closed Ahead
l 1) Left Lane Closed Ahead
12) [l/IHI‘L' mu
1?) SIlIIIDIllll'} Police Vclncle Ahead
Category 2 {Highway Hazard Zone Advisory}
1-1) Tram Approaching/At Cross-"g
15) Lo“ Otcrpass Ahead
Gear
16) Dram Bridge Up
17) Obsene Bridge Weight Lmlll
18) Rock Slide Area Ahead
19) School Zone Ahead
20) Road Narmus Ahead
21) Sharp Cane Ahead
22) Pedeslrtan Crosslng Ahead
23) Deer/Moose Crossing
7.4) Bhnd/Deal'Clnld Area
25) Steep Grade Ahead/Truck Use Lon
26) ACCIdClIl Ahead
27) Poor Road Surface Ahead
ZS) Sehonl BIlS L0ad|nglUnlnading
29) No Passing Zone
emits Inlcrscelinn Ahead
11) Suntan 1} Emergency Veh|cle Ahead
32) Imam my
Category 3 {Weather Related Hazards}
$3) ng|\ Wind Ahead
34) Sucre Weather Ahcad
35) Heavy Fog Ahead
36) High Water/Flooding Ahead
37) Ice On Bridge Ahead
335) Ice On Road Ahmad
39) Bloning Dnsr Ahead
40) Elmving Sand Ahead
41) Blowrng Sim“ Whncurn Ahead
42)fulm'(' me
Category 4 {Travel lnlbrmalion/Convenlence)
43) Res] Arch Ahead
44) Rest Area Wllh Scmcc Ahead
45) 24 Hour Fucl Service Ahead
46) Inspection Station Open
47) Inspcclinn Slalmu Closed
48) Rclhrccd Spccd Area Ahead
49) Speed Limit Enforced
511) Ha/arrlmrs Malcrrah Exn Ahead
SI) Cungcslmn Ahead/Expect Dclm
52) Expccl Ill Mlnulc Dclm
5.1) Expect 2K) Mllllllc Dclm
54)Expcc13llMimnc Dela)
55)Expcc| 1 Hour Dela}
50) Traffic Alcrl/Tunc AM Radio
57) Pa) Toll Ahcad
SX) Trucks F it Right
59) anckq E\il Left
(in) /l/Hu'<' mu
Category 5 (Fast/Slow Moving Vehicles}
61) Emergency Vchiclc In Trans”
61) Pohcc ln Pnrsmi
(G) Ovcrsm: Vcluclc In Transrl
(A) Slo“ Moung Vchlclc

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