 |
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・ME8800D was awarded "2000 VENTURE TECHNICAL GRAND PRIZE" by
THE TOKYO METROPOLITAN GOVERNMENT. |
|
・ME8800D was awarded "2001 THE PRIZE FOR TECHNOLOGY DEVELOPMENT"
by THE MEDIUM AND SMALL BUSINESS RESEARCH INSTITUTE. |
| ETC OBE tester ME8800D is an instrument for testing if OBE (On Board Equipment)
installed on car executes wireless communication correctly. It is a complete
one piece and handy type. In other words, since it is battery-operated,
it is free of a power cable and does not require any other cable for connection,
there is no troublesomeness at all in its use. This tester is always necessary
when OBE is installed at OBE setup shop. |
| General agent |
TOYOTA TSUSHO CORPORATION |
|
ITS planning department TEL +81-52-584-5169 |
|
 What is ETC OBE tester? |
|
 |
ETC (Electronic Toll Collection) system commenced its operation in full scale in Japan in March 2001. This means that final inspection on the wireless level is necessary at a car dealer or car goods shop after an ETC OBE has been installed or after user information was setup. This allows the customer to confirm that the ETC OBE is operating without fail. Otherwise, argument with the customer may arise at a later date.
An ETC OBE executes communication with a roadside unit (wireless equipment
installed at inlet / outlet or along the main line of a toll road) installed
at a tollgate at 5.8GHz, which is an extremely high frequency. It exchanges
information such as the car type, through which tollgate the car entered
the toll road and which route the car took. Therefore, unlike a TV set
or radio, it is not possible to judge visually or audibly if the installing
work was normally done.
For this reason, testing equipment of some kind is needed. It is ideal if testing is conduced with equipment identical to roadside unit installed at a tollgate, but roadside unit is extremely expensive. It is not realistic to use it as a tester. ETC OBE tester ME8800D is equipment that meets such a requirement. It can be said to be a simple version of roadside unit.
| ETC OBE tester is a necessity for OBE installer |
|
ETC OBE tester is same as toll gate |
 |
|
|
ME8800D is not an equipment to measure the receiving sensitivity or the like of ETC OBE or ETC antenna. Therefore, it does not guarantee the communication between ETC OBE and ETC antenna at a tollgate. |
|
Features |
|
|
Complete one piece
This equipment is composed of a main body only, and no cables are used
at all, not even a power cable. It is a complete one-piece type. Two AA
size dry batteries are used as the power source.
Compact and lightweight
The dimensions are as small as 138 (W) × 101 (H) × 30 (D) mm
and it is as light as 250g. Handling and carriage are easy.
Power-saving design
As the power is off automatically on termination of a test, wasteful power
consumption can be suppressed.
Easy operation
The only thing to do is to press the START button and to check the LED
(PASS or FAIL) or buzzer sound (no sound in case of PASS, continuous sound
in case of FAIL).
Sufficient test
This equipment checks the operations of transmission system, receiving
system and control circuit of the ETC OBE by conducting a basic operation
test specified in ARIB TR-T8.
In addition, this equipment is capable of conducting a stable test with
the carrier sense function (suppresses mutual interference between this
equipment and road side unit) and self-check function (checks the internal
memory of this equipment).
Available for the two deferent modes
A test may be conducted in either A mode (D1 : 5.795 GHz, U1 : 5.835GHz)
or B mode (D2 : 5.805 GHz, U2 : 5.845GHz). |
| Explanation of each part |
|
|
|
| 1. Antenna side |
: |
This is the face to be directed to the ETC OBE at the time of testing. |
| 2. Operation side |
: |
This is the face for test start operation and for check of the test result. |
|
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| 3. START button |
: |
This is the button for starting a test. |
| 4. PASS lamp |
: |
This is the LED lamp that indicates "PASS" and other status. |
| 5. FAIL lamp |
: |
This is the LED lamp that indicates "FAIL" and other status. |
| 6. Buzzer |
: |
This is the buzzer that indicates "PASS / FAIL" and other status. |
| 7. Battery cover |
: |
This is the cover for fixing batteries. Remove it for installing and replacing
batteries. |
| 8. Wrist strap installing hole |
: |
Hole for fitting a wrist strap |
|
| Display and function of operation panel |
|
|
| 1. |
Auto power on / off
When the START button is pressed, the power is on automatically and a test is conducted (for about 2 seconds). The test result is indicated for about 5 seconds after termination of a test, and the power is then off automatically. |
| 2. |
Correspondence to A / B mode
This equipment deals with two frequency modes, and A mode (5.795GHz) and
B mode (5.805GHz) are available.
A mode is executed when the START button is pressed once, while B mode is executed when the START button is pressed twice (the interval between the first pressing attempt and the second pressing attempt should be 0.2 second and up, to 1 second). The mode being used is indicated by two LED lamps. |
| 3. |
Abnormality detection function
This equipment provides three errors detect functions indicated below.
Each one of these errors can be identified by two LED lamps and a buzzer
tone.
| a. |
Abnormality of battery shortage
When batteries shortage, "battery shortage" sign is issued immediately
after the START button is pressed. Please exchange for new dry batteries. |
| b. |
Carrier sense
This is the function for suppressing mutual wave interference between this equipment and roadside unit. When a carrier from the roadside unit was detected, "with carrier" sign is issued and the test is discontinued. Move to a place where "with carrier" sign is not issued, and conduct a test again. |
| c. |
Abnormality in equipment
Self-check of this equipment is implemented when the START button is pressed,
before testing the ETC OBE. If "abnormality in equipment" sign
is issued, contact your dealer. |
|
| <Tester operation, display> |
| <LED, buzzer operation table> |
| Tester state |
ＬＥＤ |
Buzzer sound |
| Display |
PASS (green) |
FAIL (red) |
| Under test |
A mode |
|
Short blink
- - - - - - - |
Continuous
turning off
|
Short intermittence sound
 |
- - - - - - - |
|
| B mode |
|
Continuous
turning off |
Short blink
- - - - - - - |
Short intermittence sound
|
- - - - - - - |
|
| PASS |
|
Continuous
turning on
|
Continuous
turning off
|
No buzzer sound
 |
| FAIL |
|
Continuous
turning off
|
Continuous
turning on
|
Continuous sound
|
| Abnormality |
Battery shortage |
|
Continuous
turning off
|
Long blink
― ― ― |
Long intermittence sound
|
― ― ― |
|
| Existence of carrier |
|
Continuous
turning on
|
Long and short blink
― - ― - |
Long and short
intermittence sound
|
― - ― - |
|
| Abnormality of equipment |
|
Continuous
turning off
|
3 times short blink
and long turning off
- - - - - - |
3 times short intermittence
sound and long silence
|
- - - - - - |
|
| Operation explanation |
|
|
| [ Test method ] |
| 1. |
Power ON of ETC OBE
Assure that the power for the ETC OBE to be tested is on. |
| 2. |
Execution of test
Locate the antenna face of this equipment square to the antenna main axis
line of the ETC OBE at a point that is spaced 1 meter apart from the front
face of the ETC OBE. Conduct a test in A mode by pressing the START button
once, and check the test result by the item 3. If the result is "PASS",
conduct a test in B mode by pressure the START button twice (the interval
between the first pressing attempt and the second pressing attempt should
be 0.2 second and up, to 1 second), and check the test result in the same
manner. |
| 3. |
Check of test result
Find whether the test result is "PASS" or "FAIL" by
watching the "PASS" lamp (green) and "FAIL" lamp (red)
or by listening to the buzzer sound. |
 |
|
If LED and buzzer indicate an error, take the following measures. |
| Abnormality |
Correspondence to abnormality |
| Battery shortage |
Please exchange for new dry batteries |
| Existence of carrier |
Check if any roadside unit is located in the vicinity. If it is located,
conduct a test at a place in a longer distance from the roadside unit. |
| Abnormality of equipment |
Make a number of attempts. If equipment error sign is still issued, contact
your dealer. |
|
|
ORSE (Organization for Road System Enhancement) will not take any responsibility
in relation to handling of test results acquired with this equipment or
to claims related to test results. |
| Installation of batteries |
|
|
1. Remove the battery cover
2. Install two dry batteries to this equipment with attention paid to direction
of (+) and (-)
3. Close the battery cover as it was.
| Remove the battery cover |
Install new batteries |
Close the battery cover |
|
|
Always use batteries in the same combination. If batteries of different
brands, type numbers and / or residual capacity are used, battery-operating
time may shorten. |
| Specifications |
|
|
| Item |
Specifications |
[ Transmission characteristics ]
Transmission carrier frequency
Accuracy
Transmission eirp
Spurious radiation strength
Occupied bandwidth
Adjacent channel power
Carrier off leakage power
Signal transmission rate
Accuracy |
5.795GHz, 5.805GHz
within ±5ppm
within -1.7 ±1.9dBm eirp
less than 25µW
less than 4.4MHz
less than -30dBc @ 5 ±2.2MHz
less than -40dBc @ 10 ±2.2MHz
less than 2.5µW
1024kbps
within ±100ppm |
[ Receiving characteristics ]
Receiving carrier frequency
Receiving sensitivity
Radio wave strength emitted subordinately
Maximum input level |
5.835GHz, 5.845GHz
approx. -48dBm eirp @ front of ME8800D
less than 2.5µW
-2dBm eirp |
[ Communication characteristics ]
Modulation form
Communication form
Communication style
SAM |
ASK modulation
Half duplex
Point to point (communication with one ETC OBE)
Nothing |
| [ Contents of test ] |
Transmit FCMC from ME8800D and check whether ACTC and WCNC correctly return
from ETC OBE. |
| [ Functions accompanying with test ] |
| 1. |
Carrier sense function
Function to deter from mutual interface between ME8800D and road side unit |
| 2. |
Self-check function
Function to check the internal memory of ME8800D |
|
[ Reliability ]
Temperature shock
Condensation cycle
High temperature operation
Low temperature operation
Drop
Drip-proof |
-20 ±3°C (1H) ⇔ +55 ±3°C (1H) @ power off
10°C (2H) ⇔ 50°C / 70% (3H) 6 cycle @ power on every 5 minutes
45 ±3°C (192H) @ power on every 30 minutes
-10 ±3°C (192H) @ power on every 30 minutes
Height of 75cm, Concrete side, XYZ direction, 1 time each
Equivalent to [JISC0920 drip-proof no.1 style] |
[ General ]
Power supply
Operating temperature
Storage temperature
Dimensions
Weight |
SUM-3 (size AA) dry alkali battery 2pcs
-10 to +45°C
-20 to +55°C
138 (W) × 101 (H) × 30 (D) mm (excluding handle and projection)
250g (including battery) |
| * |
MICRONIX Corporation reserves the right to make changes in design, specification
and other information without prior notice. |
|
| Optional |
|
|
|
|
Wrist strap
Fit the wrist strap to the hole located at the tip of the handle of this
equipment. It is useful to prevent falling of the equipment and for storage
in a suspended state. |
|
Cigarette connector
with alligator clips
Used for advance check stated following. It is convenient, as an operation
test can be conducted before installation and wiring work for the ETC OBE. |
| ME8800D technical materials |
|
|
Inspection of heat ray reflection glass
There often are cases where heat ray reflection glass is used for the windshield
among cars produced outside of Japan and older cars. In such a case, the
installing work is completely wasted if a test is conducted with ME8800D
after completion of wiring work. Therefore, it is recommended that an advance
check shall be implemented by the method indicated below before installing
work.
Place the ETC OBE to be installed on the dashboard. Fasten the +V wire
and GND wire of the power cable coming out of the ETC OBE with alligator
clips, and insert the cigarette connector to the cigarette lighter socket.
The ACC wire is added to ETC OBE of some kind. In such a case, connect
the ACC wire and +V wire together, and fasten them together with an alligator
clip.
Conduct a test in this state with ME8800D spaced apart from the ETC OBE
by 1 meter. If the windshield is heat ray reflection glass, communication
cannot be performed and "FAIL" is indicated.
| * |
Cigarette connector with alligator clips is available as optional accessory
at MICRONIX Corporation. |
| * |
If it is not possible to lead power from the cigarette lighter socket,
a power source of equivalent voltage to that of the battery may be used.
Since the battery voltage is normally 12V, it is recommended that a 12V
power source be used. |
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