Aqua Broadcast Cobalt C-300 FM Transmitter 300 Watts

Perfect for applications like smaller Transmitter sites Community and College radio, or as an Exciter where High quality audio is needed. The COBALT C-600 Transmitter has a superior audio quality and sound clarity thanks to it‘s Direct to Channel Digital technology.

Running on a fully customised 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), Ethernet, USB, GPIO, GPS Sync with built in SFN capabilities.Radio market beating sound will let you stand out to your listeners, with it’s 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 modern design lets you easily read the Ultra-clear RGB display, and the intuitive Joystick controls with Haptic feedback and additional silicon buttons allows fast setup, getting you on the air even faster. The advanced communication package with Intuitive web interface and remote control via Ethernet (https) lets you make changes or monitor the COBALT Transmitter. Full SNMP Version 3 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

• Dynamic, UECP Compliant RDS Encoder
• Direct to Digital Synthesized modulation
• Digital MPX with MPX power Limiter
• GPS Sync
• 4 Band Audio Processor
• Linux OS
• RGB Screen
• Ethernet Control
• SNMP

GENERAL
Output Power (W) 300W
Range (W) 10 -300W
RF Output connector N-Type (Female)
Input ACV @ 50/60Hz 100-240 (277 North America only)
Power Connector IEC 13A filtered
AC-RF efficiency typ ~30%
Temperature controlled fan 1
Power supplies 1
Dimensions WxDxH (inch) 19 x 18 x 2RU (3.5″)
Dimensions WxDxH (cm) 48.3 x 38 x 8.8
Weight 8kg / 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