10
Pseudorandom Bit Sequence (PRBS) Testing
To test using the internal Pseudorandom Bit Sequence source, ensure that the Central
Office and the Customer Premises equipment are configured for loopback. The
iMcV-DS3/E3/STS-LineTerm modules should be set to normal default mode. On the
HOST iMcV-DS3/E3/STS-LineTerm module, set the Transmit Coax Data Source to
“Transmit Pseudorandom Sequence" (S1-6, S1-7=OFF). Verify the PRBS LED comes
ON at the HOST iMcV-DS3/E3/STS-LineTerm module to validate the coax wire
connections to the Central Office. Verify the PRBS LED comes ON at the REMOTE
iMcV-DS3 module to validate the coax wire connections at the Customer Premises
equipment and the fiber line going to the REMOTE iMcV-DS3/E3/STS-LineTerm
module. The fiber line returning from the remote iMcV-DS3/E3/STS-LineTerm
module is validated by verifying the RM LED is ON at the HOST iMcV-DS3/E3/STS-
LineTerm module. At this point all connections for the channel have been verified
.
11
Troubleshooting
General Troubleshooting
The Coax Port can easily be tested using the internal PRBS signal generator and
detector and a physical wire loop on the coax interface.
The Fiber Port is internally tested at all times by a working pair of units. With one
unit configured for Local Management (Switch 10 set OFF) and the other for
Remote Management (Switch 10 set ON), the fiber line is verified if the “RM” LED
is ON at both ends of the fiber line. Under normal operation only the “RM” LED
is ON at both HOST and REMOTE.
To test a media converter by itself, first make sure you have an appropriate fiber
patch cable, then follow these steps to test:
1.
Connect the media converter to the BNC device with a coax cable.
2.
Loop a single strand of fiber from the transmit port to the receive port of your
media converter.
3.
Verify that you have a valid connection for both the BNC and fiber ports on
your media converter. (No “ER” or “LOS” LED ON)
If there is trouble with link connectivity, verify your cable connection and DIP
Switch setting are correct.
Use the following LED indications to identify the fault location:
*DIP Switch 4 must be set to ON for Fault Loopback to operate as illustrated above.
12
Specifications
Standards Compliance (DS3, E3/STS, STS):
ANSI T1.102-1993
ANSI T1.107.1995
GR-820-CORE
DS3, E3/STS, STS Interface:
BNC coax 75 +/- 5% ohms
DS3 (44.736 Mbps +/- 20 ppm)
E3/STS (34.368 Mbps +/- 20 ppm)
STS (51.840 Mbps +/- 20 ppm)
Power Consumption (Typical):
0.550 Amps @ 5 V
Operating Temperature:
+32°F to +122°F (0°C to +50°C)
Storage Temperature:
-4°F to +158°F (-20°C to +70°C)
Humidity:
5% to 95% (non-condensing); 0 to 10,000 ft. altitude
Dimensions:
4.19” x .78” x 2.75”
(106.4 mm x 19.81 mm x 69.85 mm)
13
B&B Electronics Technical Support
Tel:
(800) 346-3119 (in the U.S. and Canada)
Monday-Friday, 7:00am-7”00pm CST
+353 91 792444 (Europe)
Monday through Friday 8:00am - 5:00pm GMT
Fax:
(815) 433-5109 U.S. and Canada
+353 91-79244S5 Europe
E-Mail:
support@bb-elec.com U.S. and Canada
techsupport@bb-elec.com Europe
Web:
www.bb-elec.com
14
Fiber Optic Cleaning Guidelines
Fiber Optic transmitters and receivers are extremely susceptible to contamination by
particles of dirt or dust, which can obstruct the optic path and cause performance
degradation. Good system performance requires clean optics and connector ferrules.
1.
Use fiber patch cords (or connectors, if you terminate your own fiber) only from
a reputable supplier; low-quality components can cause many hard-to-diagnose
problems in an installation.
2.
Dust caps are installed at B&B Electronics to ensure factory-clean optical devices.
These protective caps should not be removed until the moment of connecting
the fiber cable to the device. Should it be necessary to disconnect the fiber
device, reinstall the protective dust caps.
3.
Store spare caps in a dust-free environment such as a sealed plastic bag or box so
that when reinstalled they do not introduce any contamination to the optics.
4.
If you suspect that the optics have been contaminated, alternate between
blasting with clean, dry, compressed air and flushing with methanol to remove
particles of dirt.
15
Electrostatic Discharge Precautions
Electrostatic discharge (ESD) can cause damage to any product, add-in modules or
stand alone units, containing electronic components. Always observe the following
precautions when installing or handling these kinds of products
1.
Do not remove unit from its protective packaging until ready to install.
2.
Wear an ESD wrist grounding strap before handling any module or component.
If the wrist strap is not available, maintain grounded contact with the system unit
throughout any procedure requiring ESD protection.
3.
Hold the units by the edges; do not touch the electronic components or gold
connectors.
4.
After removal, always place the boards on a grounded, static-free surface, ESD
pad or in a proper ESD bag. Do not slide the modules or stand alone units over
any surface.
W
ARNING!
Integrated circuits and fiber optic
components are
extremely susceptible to electrostatic discharge damage. Do not
handle these components directly unless you are a qualified service
technician and use tools and techniques that conform to accepted
industry practices.

850-14434

Mfr. #:
Manufacturer:
B+B SmartWorx
Description:
Networking Modules iMcVDS3E3STSLineTerm BNC/FX-CWDM-SM1550SC
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union