ViaLite
quick start guide
www.vialite.com
Hxx-QS-HB-3 VialiteHD Quick Start Guide
Page 4
CR3134
Front Panel Indicators
The following table shows the operation of the front panel LEDs
Plug-in modules
Colour
Plug-in
Transmitter
(single)
Plug-in
Receiver
(single)
Plug-in
Transceiver
Plug-in
Dual
Transmitter
Plug-in
Dual
Receiver
LED1
GREEN
Normal
Flashing
GREEN
Programming
Programming
Programming
Programming
Programming
RED
TX PSU fail
Not used
TX PSU fail
TXA PSU fail
RXA PSU fail
No light
Not used
RX PSU fail
RX PSU fail
TXB PSU fail
RXB PSU fail
LED2
GREEN
Normal
Flashing
RED
fast
TX Alarm
Not used
TX Alarm
TXA Alarm
RXA Alarm
Flashing
RED
slow
Not used
RX Alarm
RX Alarm
TXB Alarm
RXB Alarm
RED
Not used
Not used
All Alarm
All Alarm
All Alarm
LED3
GREEN
I2C enabled
Flashing
GREEN
I2C active
AMBER
I2C disabled
Manual control
The Plug-in Modules can be manually configured to set various operational parameters. The dual in line package (DIP)
switches that control these configurations are located on the bottom side of the PCB and can be accessed by withdrawing
the module by approximately a third of its length. One, two or three sets of switches will be installed dependent on the type
of module.
To enable manual gain control the TX_MGC or RX_MGC switch must be set to ON ( in some manual units the MGC may
automatically be enabled). The gain can then be decreased from a maximum (all attenuators = OFF) by changing the TX
or RX attenuator settings. The gain setting for the Transmitter or Receiver will depend on the sum of the attenuators set
(ON= gain reduced by attenuator value, OFF = no gain reduction for that attenuator). The gain can only be changed by
approximately 0.5dB steps.
Depending on configuration, some units will also allow the control of the I2C bus, VSAT power supply, LNB power, special
GPS functions and automatic gain control. More details are provided in the fibre optic module handbooks.
Quick commissioning of
ViaLiteHD
fibre optic link
This short commissioning procedure illustrates the processes required to install and set up a communications link with gain control.
1.
Install the cards in the desired location within the rack, using the installation process as described earlier in this quick start guide.
2.
Remove any dust covers from your cross site fibre (or patch leads) and the connectors on the cards (if applicable).
3.
Clean the cross-site cable as described within this quick start guide.
4.
Insert fibre into the connectors on the rear of the rack/card ensuring that any keyway is aligned
5.
Power up the equipment (both ends of the link), all cards should have 2
GREEN
LED’s and 1
AMBER
LED. If any LED is
RED
or
FLASHING RED
then
check fibre connections for cleanliness and that they are correctly fitted. If this does not remover the
RED
LED’s then consult the full detailed manual (HRx-
HB or HRK-HB) for the comprehensive fault finding procedure
6.
Connect all RF cables to the RF connectors on the rack cards.
7.
Allow the equipment to warm up for 15 minutes.
8.
Ensure that the RF power into the transmitter module is set to optimum for your system. Use a broadband RF power meter for this measurement. Typically
this is the input level at which the link’s intermodulation distortion (IMD) is -40dBc. This value of input power is given in the datasheet for each type of
ViaLiteHD
fibre optic link.
9.
Calculate the approximate optical attenuation in the fibre path. As an example, if we have two bulkhead connectors (0.2dB attenuation for each), 1500m of
optical fibre (for 1310nm laser, attenuation is 0.4dB per km) giving a total of 1dB of optical loss. The total RF gain of the system should be the nominal link
gain minus 2 x the optical loss.
10. For manually set gain control, adjust the gain via the SNMP GUI (where SNMP is fitted) or the dip switches on the card to the appropriate level required. For
automatic gain control set up AGC as shown the full system manual (HRx-HB).
11. Confirm that the RF output from the receiver is correct (to within measurement accuracy).
12. If the loss is much higher (>3dB) than expected, the most likely explanation is dirt on the optical connectors. If this is the case, clean each connection in turn
until the required system gain is restored.
ViaLiteHD
user manuals
All Vialite HD user manuals are available on the CD that is shipped with each order; they can also be accessed from the
www.vialite.com
web site. In all cases the
handbook should always be treated as the master document.
FCC Approval
Information to the user of ViaLiteHD products
For a Class A digital device or peripheral, the following instructions are furnished to the user. This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct the interference at his own expense.
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LED1
LED2
LED3
