1 GENERAL PRODUCT INFORMATION
The CriticalPoint™ V3 platform of 700/800MHz BDA and Fiber DAS products consists of a Bi-Directional
Amplifier/Master Unit (BDA/MU), a Fiber Optic Expansion Unit (FOU), a Remote Unit (RU), a Battery Backup
Unit (BBU), and an external Annunciator Panel (AP). The platform of products was designed as a system to
provide a scalable solution for small or large 700/800MHz ERRCS/ERCES projects. The BDA/MU has a dual
personality, which means it can be used in a stand-alone application where only a single BDA is required to
provide adequate coverage, or in a Fiber DAS application where multiple FOU and RU devices are fed from
the main BDA/MU to provide coverage. Furthermore, the BDA/MU is field-changeable from BDA mode to MU
mode by simply selecting the correct setting in the GUI depending on if you are using as a stand-alone BDA
or in a Fiber DAS configuration. This provides flexibility to install as a stand-alone BDA system first and expand
to a Fiber DAS system later.
The BDA/MU/RU devices are FPGA-based which utilize sophisticated signal processing to provide the digital
features necessary for optimum system performance. The BDA devices are dual band, supporting the 700MHz
and 800MHz public safety bands for the US and Canada with an option to support LTE Band 14 (US only).
There are several different models available depending on the required PS Frequency Band(s), FCC/ISED
Filter Class, and RF Power. The devices are available single band or dual band, Class A or Class B, and with
a DL Power of 27dBm or 33dBm per band. Each band utilizes separate FPGA based intermediate filtering
(digital filtering). The Class A devices support up to 96 shared DL channel filters and 96 shared UL channel
filters between the 700 and 800MHz bands. Each band can support up to 64 channel filters. This allows
flexibility to allocate channel filters where they are needed and can manage radio systems that contain more
than 32 channels in a single band. There are several digital filter options the user can choose from to allow for
the best balance of rejection vs. group delay performance. The user can choose between high rejection (higher
selectivity and delay) digital filters or Low Delay (lower selectivity and delay) digital filters. The Class B devices
support up to 3 sub band filters per band which can be programmed with a minimum BW of 600KHz and a
maximum BW of 10MHz. The BDA/MU and RU devices have models that support DL Composite Power of
27dBm or 33dBm. The UL composite power for all models is 27dBm but is shared between the 700 and
800MHz bands. In other words, if using both 700 and 800MHz bands, the UL Composite Power is usually
limited to 24dBm per band to share the power evenly between both bands.
Each BDA/MU or RU device has an integrated battery charger inside which can be used in conjunction with a
Comba V3 BBU. The V3 BDA/MU/RU connects to the V3 BBU to allow the system to have a secondary source
of power should there be a loss of normal 120VAC power. There are 3 different battery capacity options
available (30Ah, 60Ah, and 100Ah) depending on the backup runtime requirement. The battery options
available are designed to support the standard requirements for either a 12-hour or 24-hour backup runtime.
You must select the correct battery option depending on your specific requirements. The V3 BBU also has a
simple connection point where an Emergency Power Off (EPO) switch can be easily integrated. An EPO switch
can be used to disconnect AC and DC (Battery) power from the circuit by a simple push of a button.
System alarms are displayed on the built-in annunciator panel of both the BDA/MU and the RU devices. The
BDA/MU and RU devices are provided with several different default annunciator panel front plates that can be
used depending on the code that is being enforced in the jurisdiction. The user can select the correct code
revision that is being used in the user GUI and attach the correct annunciator front plate to easily comply with
the alarm requirements of any jurisdiction. Furthermore, a custom blank annunciator front plate is provided that
can be used for custom alarm applications. The installer can add their own labels to the front plate according
to the required custom alarm configuration. When a configured system alarm is active, the corresponding LED
on the front panel annunciator will illuminate and an onboard buzzer will begin to sound. A mute/silence button
is located inside the BDA/MU and RU devices if the user wishes to silence an active alarm. Additionally, alarms
can connect from the BDA/MU or RU to a Comba V1 or V3 external Annunciator Panel (AP) with a dedicated
cable. The external/remote AP can be installed at a different location than the BDA/MU or RU and provides
visual and audible annunciation of configured alarms. Furthermore, the V1 AP has its own set of dry-contact
alarm outputs which can feed directly to the fire alarm panel. Alternatively, the BDA/MU and RU devices contain
their own dedicated dry-contact alarm outputs which can be fed directly to the fire alarm panel.
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