CM-300/350 (V2) Series Software-Defined Radios

CM-300/350 (V2) Series Software-Defined Radios VHF/UHF Ground-to-Air Radios Overview General Dynamics’ CM-300/350 (V2) radios are the latest additions to the
CM-300/350 (V2) - General Dynamics Mission Systems

General Dynamics' CM-300/350 (V2) radios are the latest additions to the. General Dynamics family of Ground-to-Air radios. Based on FAA NEXCOM. Segment ...
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CM-300/350 (V2) Series Software-Defined Radios
VHF/UHF Ground-to-Air Radios

Voice over IP (VoIP), compliant to EUROCAE ED-137 Front panel display and keypad Embedded co-site filter Passively cooled; no fan required < 6 second boot time
Multiple keying and squelch options Ultra high Mean Time Between Failure (MTBF)

Overview
General Dynamics' CM-300/350 (V2) radios are the latest additions to the General Dynamics family of Ground-to-Air radios. Based on FAA NEXCOM Segment 2 requirements, the radios provide reliable, clear and uninterrupted communications to improve the safety of flight in the National Air Space (NAS). CM-300/350 (V2) software-defined radios are digital, Voice over Internet Protocol (VoIP)-capable, and provide advanced, network-ready ground-toair communications. The rack-mounted transmitter and receiver systems are specifically designed to meet the dynamics mission requirements of air traffic control centers, commercial airports, military air stations and range installations.
Multimode Functionality in one Software Defined Radio
The General Dynamics VHF and UHF Digital Radios deliver more modes and a broader frequency range in a rack mount, passively cooled chassis. Advanced modes, legacy AM voice interoperability, and VoIP facilitate current and future voice and data requirements.
Key Features
nn(SNMPv3) with Ethernet
nnVHF: 112 - 150 MHz, 8.33 KHz and 25KHz channel spacing
nnUHF: 225 - 399.975 MHz, 25 kHz channel spacing
nnLow Power Transmitter 2-12 Watts with co-site filter, 2-15 Watts without filter
nnHigh Power Transmitter 12-35 Watts with co-site filter, 12-50 Watts without filter
nnRemote control and maintenance capability with SNMP and built-in test
nn100% usable receive channels

Typical Performance Parameters:
VHF/UHF General Data
nnFrequency Range: VHF: 112 �150 MHz UHF: 225 � 399.975 MHz
nnFrequency Stability:  1 ppm
nnChannel Spacing: VHF: 25 kHz, 8.33 kHz UHF: 25 kHz
nnModulation: VHF: A3E (Voice) UHF: A3E (Voice)
nnPower Supply: DC power supply: 24 V DC nominal (21.6 � 28.8 V) UHF high power only, (28 V DC nominal (+/- 10%)) AC power supply: 85-256 V, 50-60 Hz Automatic switchover AC-to-DC
nnTemperature: Operating: �10�C to +50�C Relative humidity: 90% at 40�C (non-condensing) Storage: �40�C to +70�C
nnData Interface: Ethernet
nnMaintenance: Local: Ethernet, IPV4 Remote: Ethernet IPV4 DHCP Comprehensive: BIT, software upload Setup functions: available on front panel keypad/ display Internal Measurements: Internal voltages, audio levels, Tx output power, FWD power, REV power, VSWR, Rx AGC voltage, Temperature Maintenance Data Terminal/Human Machine Interface
nnStandards: ICAO SARPS ETSI EN 300 676: VHF AM ETSI EN 302 617: UHF AM EUROCAE ED-137A: VoIP FAA-E-3014: VHF/UHF AM
nnVHF FCC Cert. IDs: MIJCM300V2 - CM-300 (V2) VDT MIJCM350V2 - CM-350 (V2) VDT

CM-300/350 (V2) Series Digital Radios

VHF/UHF Receiver Data
nnMechanical Characteristics: Width: 19 in Overall depth: 18.5 in Height: 1.75 in, 1U Weight: approximately 11 Ibs
nnPower Consumption (receiving): 24V DC: 500 mA typical 230V AC: 180 mA typical 115V AC: 270 mA typical
nnSensitivity: A3E (with cavity filter): < �102 dBm (SINAD  10 dB, 1 kHz 30%)
nnDistortion (1 kHz, 30%):  2%
nnAF Bandwidth: A3E AM Voice at 25 kHz channel spacing: > 300 � 3000 Hz A3E AM Voice at 8.33 kHz channel spacing: > 350 � 2500 Hz
nnAF Noise (�13 dBm, 1 kHz, 90%): > 40 dB
nnEffective Bandwidth @6dB: In 25 kHz: > +/�9.0 kHz In 8.33 kHz: > +/�3.5 kHz
nnAdjacent Channel Rejection: VHF:  60 dB UHF:  60 dB
nnSpurious Response:  70 dB
nn3rd Order Intermodulation (SINAD 12 dB, 100 kHz and 200 kHz):  70 dB
nnDesensitization:  80 dB
nnCross Modulation:  70 dB
nnAGC Response (A3E Voice): Dynamic range: 100 dB (Variation  3 dB) Attack time: < 30 ms Release time: < 50 ms
nnAudio Line Output: Adjustable from �25 to +20 dBm in 0.2 dB steps Impedance: 600 ohms
nnSquelch: Carrier, Audio SNR Independently selectable Independently adjustable thresholds

VHF/UHF Transmitter Data
Mechanical Characteristics: Width: 19 in Overall depth: 17 in Height: 5.2 in, 3U Weight: approx. 35 Ibs
nnPower Consumption (50W AM � 1kHz 90%): 24V DC: 14 A typical 230 VAC: 2.2 A typical 115 VAC: 3.9 A typical
nnRF Output Power: Low Power Transmitter 2-12 Watts with co-site filter, 2-15 Watts without filter High Power Transmitter 12-35 Watts with co-site filter, 12-50 without filter
nnVSWR: Up to a VSWR of 3:1 without power reduction
nnProtections: Power reduction on overheating, low voltage and high VSWR
nnAM Voice (A3E): Modulation rate: adjustable from 0 to 100% Distortion <5% (m=90%) Line input level: �25 to +20 dBm Line input impedance: 600 ohms
nnAM Responses: A3E AM Voice at 25 kHz channel spacing: > �3 dB 300 � 3000 Hz A3E AM Voice at 8.33 kHz channel spacing: > �3 dB 350 � 2500 Hz
nnDuty Cycle VHF Low and High Power Transmitters 100% UHF Low Power Transmitter 100% Duty Cycle UHF High Power Transmitter 50% Duty Cycle
nnTx Time Out: Adjustable from 5 sec to 5 min Can be disabled for continuous transmit
nnMultiple Keying Options: Variable voltage Ground key
nnSpectral Purity: Harmonics: < �80dBc (< �65dBm in L1 and L5 GPS bands w/ optional cosite filter installed) Out of band spurious: < �90dBc Noise at 1% of Fo: < �150 dBc/Hz
nnAdjacent Channel Power: AM 8.33 and 25 kHz: < �50 dBc
nnEmbedded Antenna Transfer Relay (ATR) User configurable Main/standby or transceiver configurations

actinfo@gd-ms.com � GDMissionSystems.com/atc Phone: 1-800-424-0052
�2020 General Dynamics. All rights reserved. General Dynamics reserves the right to make changes in its products and specifications at anytime and without notice. All trademarks indicated as such herein are trademarks of General Dynamics. All other product and service names are the property of their respective owners. � Reg. U.S. Pat. and Tm. Off.

D-CM300v2-17-0620