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721S Fixed Site VHF-UHF Radio Transceiver

Overview

Here’s a flexible solution for stand-alone receivers, transmitters or transceivers – the 721S high-power AM/FM VHF-UHF radio transceiver. The 721S gives you reliable, long-range communications that you can optimize for highly congested operational conditions. A full-color display and software-definable touchscreen on the removable RCU-700 radio controller unit offer you an intuitive 721S VHF-UHF receiver-transmitter user interface for radio control and status, along with voice audio and keying connections.

In addition, the 721S radio sets are fully configurable to satisfy your VHF and UHF line-of-sight needs and support multiple voice and data operating modes. You can customize them to provide AM and FM frequency coverage in any specific band up to a full 30-512 MHz. Plus, you’ll get the benefits of superior interoperability via the system’s Ethernet-based command and control system.

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Contacts

Sales
GS Customer Support
800-321-2223
319-295-5100 Email

Features & Benefits
Specifications
Typical System
Related Documents
Training
Services & Support

Key Features & Benefits

  • 30 to 512-MHz frequency range provides VHF and UHF in all radios; 121.5 and 243.0 MHz GUARD channels
  • Offers standard radios with VHF, UHF, V/UHF and 30-512 MHz extended frequency coverage
  • Fixed frequency or frequency hopping
  • Provides customizable performance and pricing options
  • AM/FM, narrowband/wideband
  • AM, FM, FSK and AM, FM wideband data
  • RCU-700 Control Unit: installed in the radio front panel or remotely connected via IEEE-compliant 10/100 Ethernet link
  • A single RCU can manage multiple RTs for monitor and control voice audio and transmitter PTT keying
  • Clarity noise reduction algorithms increase talk power, link margin and range
  • Networked remote controllers and radios allow flexible control options and the decentralized system architecture typically precludes the need for expensive voice switching systems and VoIP gateways
  • Software Defined Radio (SDR) implementation and Digital Signal Processors (DSPs) allow simplified customaization and future upgrades
  • Includes Ethernet or RS-422 remote control interfaces for radio control and monitor with a dedicated remote controller unit or standard PC
  • 70 MHz IF interface for external appliques/modems
  • Provides high power 100W RF transmitter with selectable RF output power turndown
  • Built-In-Test capability in both receiver-transmitter and radio controller unit provides fault detection and isolation
  • Same mount and cabling as legacy GRC-211/171 radios
  • 999 mode and frequency presets
  • Built-in loudspeaker
  • AC or DC input power with auto-switchover
  • Internal tracking filter options tailor performance to operate efficiently in any cosite environment
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Performance
Power
Environmental

Operating Frequency: 30.000 – 511.975 MHz (available)

Channel Spacing and Modulation Modes: 25 kHz (AM DSB, FM, FSK); 12.5 kHz (AM DSB, FM, FSK); 8.33 kHz (AM DSB in VHF ATC band)

Receiver Sensitivity: -103 dBm, AM voice; -108 dBm, FM Voice; -97 dBm, AM or FM WB

Stability: 1.0 PPM (0.1 PPM available)

Transmit Power: 100 W FM; 30 W AM carrier @ 90% mod; Adjustable power output in 1 dB steps

Transmit Duty Cycle: Continuous duty under all conditions; Full power at VSWR <2:1; up to 6 dB power reduction VSWR >2:1

RT: Standard 19” wide rack mounted; 7” (4 RU) high

RT Control: Removable front panel radio controller unit, external RCU or remote networked PC

Built-In-Test: Continuous fault detection (C-BIT); User initiated fault Isolation (I-BIT)

Audio: NB voice and WB data; Balanced 600 Ohm; -10 to +10 dBm output level; Adjustable in approx. 1 dB steps; Tape/external speaker output

Reliability: >50,000 hours MTBF ground benign

Maintainability: NMT 15 minutes MTTR

Power Input:

90 to 250 V ac, 48-62 Hz, 1 Phase; 24 to 30 V dc

Temperature: -30°C to +55°C operating; -40°C to +85°C storage

Humidity: 5% to 95% non-condensing

Cooling: Internal forced air

Operating Frequency: 30.000 – 511.975 MHz (available)

Channel Spacing and Modulation Modes: 25 kHz (AM DSB, FM, FSK); 12.5 kHz (AM DSB, FM, FSK); 8.33 kHz (AM DSB in VHF ATC band)

Receiver Sensitivity: -103 dBm, AM voice; -108 dBm, FM Voice; -97 dBm, AM or FM WB

Stability: 1.0 PPM (0.1 PPM available)

Transmit Power: 100 W FM; 30 W AM carrier @ 90% mod; Adjustable power output in 1 dB steps

Transmit Duty Cycle: Continuous duty under all conditions; Full power at VSWR <2:1; up to 6 dB power reduction VSWR >2:1

RT: Standard 19” wide rack mounted; 7” (4 RU) high

RT Control: Removable front panel radio controller unit, external RCU or remote networked PC

Built-In-Test: Continuous fault detection (C-BIT); User initiated fault Isolation (I-BIT)

Audio: NB voice and WB data; Balanced 600 Ohm; -10 to +10 dBm output level; Adjustable in approx. 1 dB steps; Tape/external speaker output

Reliability: >50,000 hours MTBF ground benign

Maintainability: NMT 15 minutes MTTR

Power Input:

90 to 250 V ac, 48-62 Hz, 1 Phase; 24 to 30 V dc

Temperature: -30°C to +55°C operating; -40°C to +85°C storage

Humidity: 5% to 95% non-condensing

Cooling: Internal forced air

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Main Components

Please contact Rockwell Collins for additional information on this product.

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A complete range of technical information is available to support your operation and maintenance needs. The technical publications index allows you to identify the most current version of a publication, service bulletin or related document by part number, equipment type, system and similar functions.

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We provide a dedicated team of trained field service engineers ready to be dispatched at the point of need. Whether it's training, testing or on-site consultations, we have field service engineers ready to respond to your support requirements.

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