Description

Housed in a rugged, Industrial chassis, the Cobalt C50-I is designed for demanding environments, in an ultra -compact form that is designed to be mounted in various ways.

 

With its maximum output power of 50W, Cobalt C50-I Transmitter has the same, superior audio quality and sound clarity of all other COBALT Transmitters clarity thanks to it‘s Direct to Channel Digital technology (DDS). Running on a fully customized LINUX OS system, this low distortion modulator is available on all models within the COBALT family of FM Transmitters. Inputs and outputs include Analog, AES/EBU, Digital MPX (AES192), ITU-R BS412.9 Limiter, Ethernet, USB, GPIO, GPS Sync with built in SFN capabilities.

 

The Cobalt C50-I does away with the Screen and front panel controls and is setup and controlled via its web-remote, on either Wi-Fi or LAN.

 

A standard DC Input lets you run the COBALT C50-I on a 48V DC power system and opens further possibilities for off-grid power options.

 

Radio market beating sound will let you stand out to your listeners, with its built-in 4 band Audio Processor with Bass enhancement, Pilot protection, Wide AGC and a whole bunch of expertly designed modern presets, so you sound great right from the start.

 

The advanced communication package with Intuitive web interface and remote control via Ethernet (https) lets you make changes or monitor the COBALT C50-I Transmitter.

 

Full SNMP management and the ability to send emails, alerts and monitor audio remotely gives you added confidence knowing you have full control from anywhere in the world on any device with a Web browser.

 

Easy access to all components and software controlled variable fan speed, will guarantee you low cost of maintenance.

 

The highest AC efficiency, a compact design and reduced weight mean low cost of transportation and far the lowest total cost of ownership in its class.

 

Features:

• 4 Band Audio Processing
• Dynamic, UECP Compliant RDS Encoder
• Direct to Digital Synthesized modulation
• Digital MPX Encoder
• MPX Power Limiter
• Linux OS
• Ethernet Control and SNMP
• GPS Sync
• Standard Auxiliary DC power input

 

Specifications

GENERAL

Output Power (W)                      50W

Range (W)        5-50W

RF Output connector                N-Type (Female)

Input ACV @ 50/60Hz              100-240

Power Connector                       IEC 13A filtered

Power consumption                  ~50W @ max power

AC-RF efficiency typ                   ~30%

Temperature controlled fan    1

Power supplies                            1

Dimensions WxDxH (inch)      6.5 x 12 x 5.1

Dimensions WxDxH (cm)         16.6 x 31.2 x 13.2

Weight               3.7kg / 8.14lb

MODULATOR

Transmitter type                         Solid-state FM Stereo transmitter

Modulator       Direct-to-channel (DDS)

RF Output Frequency Range  VHF Band II, 87-108MHz

RF Frequency Steps                   100kHz

Frequency Stability                    ±1 ppm or ±150Hz in 0-50⁰C range with internal 10MHz clock  reference

FM Modulation Range Capability                      75kHz default, 100% modulation user adjustable up to 105kHz  140%), maximum 300kHz

RF

Power Stability                            ≤ ± 0.25dB

Asynchronous/AM noise         ≤ -60dB

Synchronous AM s/n ratio      ≤ -60dB

RF Harmonic and Spurious Suppression         Meets ETSI requirements

VSWR operation                         Fully protected against gradual or sudden VSWR conditions. Proportional power reduction from VSWR 1.5:1

STEREO ENCODER

Performance    400Hz/1kHz test tones at modulation level ≤75kHz

Modes               Stereo, Mono L+R, Mono L, Mono R

Frequency response                  20Hz-15kHz ±0.02dB

Pre-emphasis  0, 50 or 75μs

Pilot tone          19kHz, adjustable level 0-12%

Subcarriers suppression          ≤ -70dB

Stereo separation                       ≥75dB AES/EBU input, ≥70dB Analogue input

Stereo SNR       ≥80dB with 75us de-emphasis, ≥75dB without de-emphasis, both inputs

Stereo THD+N <0.03%

Crosstalk           ≥70dB, between L+R and L-R due to channel matching, both inputs

MONO PERFORMANCE

Frequency response                  20Hz – 15kHz  ±0.02dB

Pre-emphasis 0, 50 or 75 µs

Mono SNR        ≥75dB AES/EBU input, ≥70dB Analogue input

Mono THD+N  ≤0.002% analogue input, ≤0.001% AES input, with 75us  de-emphasis

ANALOGUE MPX INPUT PERFORMANCE

Frequency response                  10Hz-53kHz ±0.03dB, 53kHz-70kHz ±0.3dB

FM SNR             10Hz-53kHz ±0.03dB, 53kHz-70kHz ±0.3dB

THD+N               ≤0.003% with 75us de-emphasis

DIGITAL MPX INPUT PERFORMANCE

Frequency response                  -90kHz ±0.005dB

FM SNR             ≥100dB, with 75us de-emphasis

THD+N               ≤0.001% with 75us de-emphasis

AUDIO INPUTS

Analogue          2 x XLR female, 10kΩ impedance, level adjustable 0-24dBu

Digital                 24dBu AES/EBU via RJ45 per StudioHUB+, level adjustable  -20-0dBFS, sampling rates 32-192 kHz

AUDIO OUTPUT

Headphones Out                        1/4″ (6.3mm) female stereo socket, software adjustable volume, minimum load impedance 16Ω

WIDEBAND INPUTS

Analogue MPX                             BNC,  10kΩ impedance, level adjustable 0-12dBu

Digital MPX      AES/EBU via RJ45 per StudioHUB+, level -20-0dBFS, sampling rate 192kHz left channel

Analogue  RDS BNC,  10kΩ impedance, level adjustable from 0.1-10Vpp

WIDEBAND INPUTS

Analogue MPX                             BNC,  10kΩ impedance, level adjustable 0-12dBu

Digital MPX      BNC,  10kΩ impedance, level adjustable 0-12dBu

RDS GENERATOR

Type                   Fully Dynamic RDS/RDS2/RBDS Generator

Protocols          ASCII commands, UECP protocol and X-Command Multi-port architecture

Ports

UART over USB-B & Ethernet

 

COMMUNICATION AND CONTROL

10MHz input   BNC, 50Ω terminated

1PPS input       BNC, 50Ω terminated

RF sample output                       SMA, 50Ω, -30dBc

UART over USB                            USB-B, system control

USB                     2 x USB-A, storage & FW upgrade

Ethernet            1 x RJ45

RS232                DB25 shared connector, system control

GPIO                   DB25 shared connector, 8 x output & 8 x input, all optically isolated.

Interlock/RF Mute                      DB25 shared connector, programmable logic/polarity

Analogue voltage output         DB25 shared connector, 4-channel 0-5V range

ENVIRONMENTAL

Altitude             15,000 ft / 4,420m AMSL

Temperature range                    0 to +45ºC working. -10 to +50ºC storage

Humidity           95% @ 35ºC, non-condensing