Coming March 2025

Comba’s Advanced VHF/UHF BDA Solution: Revolutionizing Critical Communications Connectivity

Introducing Comba’s Next-Generation Bi-Directional Amplifier (BDA) Solution for Critical Communications

Launching in March 2025, Comba Telecom’s latest BDA system is engineered to provide unparalleled communication support across Canada. This advanced solution ensures reliable and seamless connectivity in critical situations, adhering to the highest industry standards. Transferable to Fibre DAS.

PRODUCT DETAILS

Frequency Bands

Supports VHF (138-174 MHz) and UHF (406-430 MHz, 450-470 MHz) frequencies, available in single-band or dual-band configurations. Upgradable from single to dual-band via license keys.

Advanced Filtering

Offers up to 32 downlink and 32 uplink filters per band for both VHF and UHF, with selectable Class A or Class B filters through an intuitive web-based GUI.

Flexible Duplexing

Provides rich duplexing options and is available in simplex configurations to meet diverse operational needs.

Enhanced Communication Controls

Features channelized Automatic Level Control (ALC), squelch, and NetProtect support to maintain optimal communication quality.

Built-in Safety Mechanisms

Includes isolation testing and auto shutdown upon oscillation detection to ensure system integrity and safety.

User Friendly Interface

Equipped with a web-based GUI and supports SNMP for seamless monitoring and management.

Battery Backup

Comes with an integrated battery charger unit, compatible with Comba’s BBU V3, to ensure uninterrupted operation during power outages.

Seamless Communication…When Every Second Counts

Specifications

Uplink noise at max gain		< 7 dB
Power supply		AC or DC
Power consumption:		Single Band < 100W, Dual Band < 120W
Uplink		+24dBm VHF, + 27dBm UHF
Downlink		+24dBm VHF, + 30dBm UHF
Maximum system gain		85dB
Gain adjustment range		0-30dB
Built in isolation detection		YES
Oscillation auto shutdown		YES

ANSI/CAN/UL2524		YES
UL-50E		YES
NFPA/IFC Compliant / ISED/IC Certified		YES
Additional dry contact ports		YES
SNMP support		YES

	When uses Class A filters	When uses Class B filters
Filtering	32 channels per band	5 wide band filters shared by both band
Uplink AGC	Channelized	Wideband
Uplink squelch	Channelized	Wideband
System group delay	15 ~ 48 uSec	< 6.5 uSec