Tower Top Amplifiers (TTAs) are low-noise receive amplifiers mounted close to the antenna to improve receiver sensitivity by amplifying weak signals before they travel down long coaxial cable runs.

Key Features (Across the Portfolio)

• Low noise amplification to improve uplink/receive performance

• Tower-mounted, weatherproof enclosures for harsh outdoor environments

• High TX/RX isolation to protect receivers from strong transmit signals

• Automatic bypass on power or amplifier failure (on many models)

• Connector options including Type-N and 7/16 DIN

• Optional test ports and attenuators for commissioning and maintenance

Frequency Coverage

• UHF (400–470 MHz)

• 700 MHz public safety bands

• 800 / 900 MHz bands

Designed to support narrowband and broadband receive systems depending on model.

Typical Applications

• Public safety radio systems (P25, trunked, conventional)

• Utilities and critical infrastructure communications

• Paging and dispatch networks

• High-site towers with long feeder runs

• Receive-only or receive-critical sites requiring low noise and high isolation

Customer Value

• Improves talk-in and uplink reliability

• Reduces performance loss caused by long coax runs

• Enhances system coverage without increasing transmit power

• Helps maintain compliance and operational reliability at mission-critical sites

Common dbSpectra TTA Series / Part Numbers

(For reference only)

• ATS4 / ATS7 / ATS8 / ATS9 Series – Single-band tower top amplifiers

• DS7 / DS8 / DS9 Series – Dual-stage or redundant LNAs with bypass

• Variants with “D” typically indicate DIN connectors

• Variants with “R” often include attenuators or revisions