Description

Digital FM Transmitter 300 watt with DDS Exciter, Stereo Encoder, Analog Audio Inputs, AES/EBU, MPX, Dynamic RDS, SFN s

 

Perfect for applications like smaller Transmitter sites Community and College radio, or as an Exciter where High quality audio is needed.

The COBALT C-300 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
• Optional DC Auxillary Power Input

Available Options – please check related products for price:

• Cobalt Tuner Option
• Cobalt 5 band Audio Processor Option
• Cobalt Dante/AES67 Option
• Cobalt MicroMPX Option
• Cobalt 2U redundant PSU Option (C-300, C-700, C-1000)
• Cobalt 48V DC Power Option
• Cobalt 2U External Fan Option (C-300, C-700, C-1000)

GENERAL

Output Power (W)	300W
Range (W)	10-300W
RF Output connector	7/16 DIN (Female)
Input ACV @ 50/60Hz	100-240 (277 North America only)
Power Connector	IEC 13A filtered
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	7.2kg / 15.87lb

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