Intraplex®IP Link MPX
Intraplex® IP Link MPX
IP Link Codecs
The Intraplex® IP Link MPX transparently transports
your FM MPX composite signal over IP networks
Offering flexible sampling rates and sample sizes options for digitizing the analog FM MPX composite signal, the IP Link MPX
codec optimizes IP network bandwidth utilization based on FM services being transported. IP Link MPX codecs are suitable for
use in IP based Studio to Transmitter Links (STLs) as well as distribution networks. Support for IP multicast and multiple unicast
streams enables one encoder to feed multiple decoders.
By incorporating three IP Interfaces that can be used for streaming and management, the IP Link MPX system can provide a
level of reliability not seen in comparably-priced codecs.
As the latest addition to the Intraplex family of audio and data transport products, the IP Link MPX codec bring legendary
Intraplex reliability to the IP codec market.
Product Features
■■ Single bidirectional FM MPX
composite signal
■■ Redundant input MPX signal ports
with automatic failover based on
signal activity
■■ Redundant output MPX signal ports
■■ Independent signal level setting for
each input and output MPX signal
■■ Flexible sampling rates and sample
size options to tailor IP WAN
■■ Two channels of SCA mixing
■■ Three independent IP interfaces for
redundant network operation
■■ Optional redundant power supply:
12VDC or 48VDC
■■ VU meters to indicate input and
output MPX signal levels
■■ GPS support for precision digital
timing reference
Connecting What’s Next
■■ Decoding of L and R audio and
RDS data from input or output
MPX signal. Audio is output on XLR
connectors and front headphone
■■ Built-in silence sensor with optional
stream switch over
■■ Optional Dynamic Stream Splicing
with time and network diversity
provides “hitless” packet loss and
network loss protection
■■ Prioritized stream sources at the
output with automatic switch over
and switch back between primary
and secondary
■■ Programmable RTP level Forward
Error Correction (FEC) scheme
■■ Programmable time diversity and
interleaving of streams to combat
burst packet losses
■■ Integrated with Intraplex IP Link
Scheduler for automated scheduled
program switching
■■ Integrated with Intraplex LiveLook
(network analytics and monitoring
■■ N+1 redundancy with integrated
control of external switching
■■ SynchroCast™ option provides
dynamically managed precision
delay for Single Frequency Network
(SFN) broadcasting and simulcasting
■■ Support for IP multicast and multiunicast
■■ Web browser user interface and
SNMP network management
■■ Eight multipurpose contact closure
inputs and outputs provide:
■■ Transport of logic signals with time- alignment to MPX signal
■■ Stream control
■■ Alarm notification
Product Details
The IP Link MPX belongs to the IP Link family
of codecs. Now FM MPX composite transport
can have an unprecedented level of
reliability and performance. At the hardware
level, the N+1 redundancy with built in
control for both MPX routers and data
switches provide automatic synchronization
of configuration and switch over capability.
This reliability is further enhanced with
optional hot-standby power supply.
By offering three bandwidths: 60, 74 and 99
kHz and three sample sizes: 16, 20 and 24
bits, IP Link MPX enables great flexibility in
optimizing the IP WAN bandwidth based on
the FM services to be transported.
IP Link MPX provides monitoring capability
to decode the L and R stereo audio and
RDS data from either the input or output
MPX signals. The analog audio is output on
both XLR connectors as well as a front panel
headphone jack.
interleaving can provide protection against
burst packet losses.
A built-in silence sensor and alarm enable IP
Link codecs to offer a variety of automatic
backup options. If the main link is lost, it can
switch to a secondary feed.
Two SCA inputs allow subcarriers generators
to be located at the MPX decoder. The SCA
mixing function can be enabled per channel
and injection gain is digitally controllable.
A convenient graphical front panel user
interface and comprehensive Web browser
interface makes the IP Link MPX easy to
monitor, configure, and operate.
At the streaming layer, Dynamic Stream
Splicing provides a set of networking tools
for reliability, such as redundant streams
with network and time diversity. The
support of Forward Error Correction (FEC)
and interleaving further enhances these
capabilities. These tools can be intelligently
combined to achieve reliability generally
associated with T1/E1 circuit over less
robust IP networks. Hitless operation can
be achieved when multiple networks are
available. The use of time diversity on
redundant streams along with FEC and
Optional SynchroCast capability to
dynamically align the playback of the
MPX signal at geographically dispersed
transmitter sites for SFN broadcasting.
VU meters for each MPX signal provides
convenient access to signal level
Specifications and designs are subject to change without notice
One FM MPX composite signal encode and decode
Two input and two output MPX signal ports for redundancy
Front Display
Graphical front panel user interface - 3.2 inch display; 256 x 64 pixel, white monochrome OLED; six-button keypad; VU meters
for each MPX signal port
Optional: MPX delay programmable up to 1 second with 1 microsecond accuracy
Configurable for automatic backup to secondary incoming MPX stream
Contact Closures
Eight input and eight output opto-isolated contact closures, with time-alignment to MPX streaming
Contact inputs can transport state to peer or control stream state
Contact outputs can receive state from peer or be tied to system alarms
N+1 with integrated support of external switching equipment
Rear panel:
Ethernet: Three 10/100 Base-T, RJ-45
MPX: Two BNC for MPX inputs and two BNC for MPX outputs
SCA: Two BNC for SCA inputs
(All BNC connectors are 75 ohms, unbalanced)
Two XLR for analog L and R audio
Contact Closures: D-sub, 26-pin female USB: Type A
DC Power: Two pin screw terminal AC Power: C14 power inlet
Front panel:
Ethernet: 10/100 Base-T, RJ-45
Audio Headphone: ¼” stereo headphone jack
External GPS: 10 MHz and 1 PPS BNC connectors
Optional: GPS receiver plug-in board kit with SMA connector for external GPS antenna (provided with kit)
Connecting What’s Next
FM MPX Composite
Analog Bandwidth
60, 74, or 99 kHz
60 kHz bandwidth: 0.1 Hz to 60 kHz, -1 dB
74 kHz bandwidth: 0.1 Hz to 74 kHz, -1 dB
99 kHz bandwidth: 0.1 Hz to 100 kHz, -1 dB
All bandwidths: 20 Hz to 53 kHz +/- 0.05 dB
Total Distortion
(THD+N) Less than 0.003%
Dynamic Range
Greater than 90 dB
Signal Level
Full scale analog MPX input/output: -6 to 18 dBu, user-settable in 0.5 dBu steps
Sampling Rate
132, 162, or 216 ksps
Sample Size
16, 20, or 24 bit
Input Impedance
Greater than 10 k ohms, jumper settable to 75 ohms
Output Impedance
Less than 10 ohms, jumper settable to 75 ohms
Two BNC inputs for SCA with 600 ohms impedance
Injection Level
SCA mixing into MPX composite output. Gain from each SCA input to each MPX output is user settable from 20 to -64 dB in
0.5 dB steps. Maximum injection level is 3 dBu
SCA mixing can be independently enabled for each SCA input to each MPX output
Demodulation of L and R stereo audio from either MPX signal input or output
Full scale audio output level: 9 to 24 dBu, user settable in 1 dB steps
Output: XLR balanced, less than 50 ohms impedance
RDS decoding from either MPX signal input or output of PI, PS, TA, TP, PTY, RT, and CT data
Ethernet Data Rate
10/100Base-T (10 or 100 Mbps) full duplex, auto-negotiation
Two WAN ports plus management port. Mirror port on front panel
Network Protocols
Web browser interface
Per port 802.1 pq configuration; Three network ports available for both streaming and management
RTP Streams
Total of six streams: Unicast, multi unicast, and multicast
Source IP address and UDP port verification at the receiver for security
Automatic failover mode between Primary, Secondary and Backup streams
Dynamic Stream
Optional: Enables multiple identical MPX streams to be sent across the IP network (or two separate IP paths, if available) and
provides for hitless switching at the decoder
Jitter Buffer
Programmable jitter buffer depth up to 1024 packets. Static or automatic jitter buffer adjustment
Forward Error
Multiple FEC schemes configured per stream with 25%, 50%, 66% and 100% overhead selection
Time Diversity
Time delay configured on per stream basis, used with redundant streams for burst packet loss protection
Configured per stream for mitigation of consecutive packet losses
Test Tone
1 kHz test tone at -12 dBFS
MPX input to output equipment loopback while simultaneously sending streams from the input MPX signal port
Statistics Tracked
Burst packet loss statistics based on RFC 3611
Per stream and group statistics for packets received, packet lost, packets recovered by FEC and packets sent
Send and receive stream bandwidth
Connecting What’s Next
Status Indicators
LED Indicators
Stream activity and status
Multi-LED bar graph signal level VU meters for MPX input and output signals
Alarm Reporting
Major/minor alarms, normally open relay contacts, SNMP traps
Maintains internal and syslog messages alarm log
Log files can be sent off to off-site server for storage
User configurable per-stream packet loss threshold
Built-in silence detection with ability to provide alarm and perform switch over of stream on loss of MPX signal
Mechanical and Environmental
1RU: 1.75 x 19 x 10.1 in.
(H X W X D)
(4.45 x 48.3 x 25.7 cm)
EIA rack mountable 5 lbs (2.27 kg) typical
Power Supply
Main: AC 100-240 VAC, 50/60 Hz with type T2A 250 V AC input fuse
Backup: Optional external module, AC to 12 VDC converter or internal module for -48 VDC
15 watts
10% to 90% non-condensing
32º to 122º F (0º to 50º C)
CE, FCC Part 15 Class A, UL 60950, RoHS
Connecting What’s Next
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