EtherMPX v3 User Manual
Contents
1. 9 1 m a a Unbalanced MPX input BNC female Excessive input level alarm LEDs L R Right channel balanced input XLR3 female Left channel MPX balanced input XLR3 female AES EBU balanced input XLR3 female 10 100 Ethemet port RJ 45 female RS232 port DB9 female LOM Hz input amp output BNC female SN option On Off power switch 0 100 240VAC power input connector IEC The rear panel Decoder hr amp see Om o o E 1 2 9 Pett 3 7 8 Unbalanced MPX output BNC female Unbalanced AUX MPX input BNC female Right channel balanced output XLR3 male Left channel MPX balanced output XLR3 male AES EBU balanced output XLR3 male 10 100 Ethemet port RJ 45 female RS232 port BD9 female LOM Hz output BNC female SFN option On Off power switch 0 100 240 VAC power input connector IEC SOR NOM RWNE 2 Installation instructions Encoder amp Decoden 1 Install both Encoder amp Decoderina 19 rack 2 Connect powerand Ethemet cables as shown below Enc oder connections eeu eu ee 2 4 3 Connect the MPX output of your audio processor stereo encoder Connect the RJ 45 LAN cable of your local network Connect the IEC power cable 100 240VAC 50 60HZz Tum the power switch on Decoder connections w o cm ome ce D a f e00n iad 3 5 4 1 2 Connect the MPX output of the EthernMPX Decoderto your FM Exciter Connect yourbackup aud2. DER Good T Frames 3 64 Bad T Frames 0 Good Rs Frames 19325832 Bad As Frames 0 Good PTF Sync 32066 Bad PTF Sync Ab Clock Difference a nS Measured delay Und pet Good TX Frames Ethemet frames transmitted OK from the device no intemal underuns overruns network collisions Bad TX Frames Ethemet frames that failed to be transmitted from the device possible causes intemal undernun overun or network collisions Good RX Frames Ethemet frames received OK from the device no CRC errors no undernuns overruns no network collisions Bad RX Frames Ethe met frames received but dropped by the device possible causes CRC enorss intemal underun overrun network collisions Good PIP Sync Only available if SFN option is installed and enabled Number of PIP SYNC messages received OK and took into account by 16 the device algonthmsto calculate and calibrate on the fly the sync parameters Bad PIP Sync Only available if SFN option is installed and enabled Number of PIP SYNC messages received but rejected by the device algonthms Possible causes Glitching Master Clock heavy loaded network many irelevant Ethemet packets that must be filtered out Clock difference Only available if SFN option is installed and enabled The measured mismatch between the Master Clock and the local clock expressed in nanoseconds nS This value must be as low as possible to indicate that there isa good s
3. bnet as your devicesare Refresh Use this command to discard any changesmade and reload the last saved configuration stored in your computer lal Save Use this command to save locally in yourcomputer any changes made and simultaneously send them to the selected device Encoderor Decoder Play This command is available only when the selected device isan Encoder device Use thiscommand to start audio level capture and display it in realtime at the VU meter located at the down nght comer of the Diagnostics area 13 J Stop This Command is available only when the VU meter is running Use it to stop audio level capture from Encoder 2 Devices list In this area will be displayed all the devices discovered in your network after you used the Discovery command button fy k icon Indicatesan Encoderdevice icon Indicatesa Decoder device Next to each icon the device name and MAC address is displayed 3 Device properties When you click on a device in the Devices list area its properties and parameters are displayed here System type ENCODER or DECODER non modifiable DSP version The finmware version running in the main processor of the selected device non modifiable MAC address The MAC address of the network interface of the selected device non modifiable Senal number The production senal number of the selected device non modifiable System name View or modify the human fnendly name
4. ers When in Multicast packets sent from Encoder will have destination IP as defined in the Multicast IP field box see below Remote Multicast IP This field hasa double purpose In Encoder with TX Type Unicast you type the IP address of the target Decoder to transmit to In Encoder with TX Type Multicast you type the destination Multicast IP addressin the range of 239 0 0 1 to 239 255 255 254 The Decoders participating in this group must be also configured to listen to the same multicast IP address Bounded to Reserved for future releases hasno effect Buffer size This isa Decoder only functionality View or modify the audio buffer size of the selected Decoder Please refer to Network considerations section above Threshold This isa Decoder only functionality and it isenabled only when Auto detect audio routing is selected This is a parameter of the integrated Silence Detector in the Decoder and definesthe audio level threshold to start a countdown timer before it bndgesthe AUXIN to the MPX OUT connector assuming that the audio over IP is lost Timeout This isa Decoder only functionality and it isenabled only when Auto detect audio routing isselected Thisisa parameter of the integrated Silence Detector in the Decoder and defines the initial value of the countdown timer Silence Detector example Threshold 18dBu Timeout 20 sec lf the audio level coming from the EtherMPX encoder is belo
5. ference clock provided by each Decoder To accomplish this we have implemented a PIP mechanism IEEE1588v2 which synchronizes each Decoder to the clock of the Encoder which actsasa Master Clock The accuracy and stability of this method heavily depends on the intermediate network elements such as Ethemet switches wireless IP links etc Special network devices with PTP support are already available in the market but for small scale implementations ordinary devices can be utilized with a small impact to the overall performance In cases where excessive latency fluctuations occur like WIFI links the PTP algonthms cannot handle it and synchronization is extremely poor We are constantly trying to improve our PIP algonthms so please consult our support team for further information The overall performance amp accuracy also depends on the quality of the Master Clock The Encoder Master Clock is based ona TCXO with an accuracy of 2 50pm so in cases where more accuracy Is required it is suggested to use an extemal LOMHz clock Rubidium atomic clock or GPS LOMHz reference Encoder To select the intemal 10M Hz reference switch the CLK to Int from the front panel menu LCD display and buttons If you want to use an extemal 10M Hz reference please connect it first to the rear female BNC connector marked as 1OMHz INPUT and then switch the CLK to Ext from the front panel menu When switching from In
6. in L R mode Audio levels are displayed asa bargraph VU meter and as numencal value in dBFS Please note that this isa display only menu You cannot modify any parameter 3 Menu Network settings Enc oder ID Disolaysthe device name You cannot modify this parameter from the LCD menu you have to use the EtherMPX NMS software IP Displays the device IP address You can modify this parameter within the range of 1 0 0 1 to 254 255 255 254 Clk Selects the reference clock source Int or Ext You cannot modify this parameter from NMSto avoid lossof communication Only local modification is allowed When selecting Int the Encoder usesthe intemal 1OMHz IC XO reference When selecting extemal uses an extemal 10M Hz reference connected at the rear 10M Hz INPUT female BNC connector If the extemal 10M Hz reference Is lost system halts SFN Displays the operational status of the SFN option if installed The Off status disables the Master Clock When On the Master Clock isenabled 11 Menu Network settings Decoder ID Displays the device name You cannot modify this parameter from the LCD menu you have to use the Ethe MPX NMS software IP Displays the device IP address You can modify this parameter within the range of 1 0 0 1 to 254 255 255 254 Att Displays the analog output attenuation setting A value of OdB meansno attenuation You can modify this parameter in ste
7. io source to AUXIN Connect the RJ 45 LAN cable of your local network Connect the IEC power cable 100 240VAC 50 60HZz Tum the power switch on Audio levels adjustment at Encoder Analog audio input at Encoder should not exceed 6dBu 4 37Vpp Suggested nominal range is OdBu 2 19Vpp to 4dBu 3 47Vpp The audio outputs at the Decoder will provide the same audio level 1 1 as fed into the Encoder Analog and digital outputs of Decoder are operating simultaneously Rear panel LED indications at Encoder OVFL LEDs two one foreach analog input Indicates extremely audio level that needs immediate attention otherwise damage may occur at analog input stages of the Encoder Front panel LED indications Encoder amp Decoder PWR LED Indicates that power istumed on LINK LED Indicates that an Ethemet connection is present ACTLED Indicates that audio transmission is active Note When Encoder is configured in Unicast mode and powered on it searches forthe Decoder ACT LED is blinking every second When a connection is established ACT LED at Encoder amp Decoder stay always on If connection is lost Encoder will cease transmission after 10 minutes and will start the search sequence each 17 seconds Default settings Encoder default IP 192 168 1 90 24 Decoder default IP 192 168 1 91 24 Factory setup Analog MPX Unicast Network considerations If you have multiple EtherMPX devices in the
8. of the selected device Highly recommended if you have more than one Encoderormore than one Decoder in your network This helps you to identify the properdevice to manage System IP View or modify the IP address of the selected device Gateway IP View or modify the network gateway IP address of the selected device Network mask View or modify the network mask of the selected device VLAN Reserved for future releases User cannot modify this SFN option Only available when SFN option is installed in the selected device Audio routing This isa Decoder only functionality View or modify the audio route of the selected Decoder Use the drop down menu to select between the available options o Force extemal Take the audio from AUXIN and passit to the MPX OUT o Force intemal Take the audio from Ethemet and passit to the MPX OUT o Auto detect Enablesthe Silence Detector see below 14 Audio type View or modify the audio format of the selected device Use the drop down menu to select between MPX or UR Audio source This isan Encoder only functionality View or modify the input source of the Encoder Use the drop down menu to select between Analog or Digital AES EBU inputs TX type This isan Encoder only functionality View or modify the audio over IP transmission mode at the Encoder Use the drop down menu to select between Unicast one Encoderto one Decoder or Multicast one Encoderto many Decod
9. ps of 0 5dB within the range 0 0dB to Mute SFN Displaysthe operational status of the SFN option if installed The Off status means that the device is unning on the intemal clock When On the device is synchronized to the Best Master clock elected from the network please refer to IEEE1588v2 protocol specifications for more details on this System information DSP Enc amp Dec Displays the finmware version running in the main processor You cannot modify this parameter CPU Enc amp Dec Displays the fimmware version running in the O amp M Operation amp Maintenance processor You cannot modify this parameter 4 NMS Software descnption EtherMPX MMS 3 4 2 Sigmacom Broadcast l aloj xj 4 2 h 8 Seledt element 2 tems Element properties a a a EEN Sygem type ENCODER MAC address 2E 8B F2 10 00 7E DSP verion 3 42 Seral number 314 System name SIGMACOM ENCOD Audio type pp System IP 92168157 Audio source anao Gateway IF fs216811 TH type Multicast Network mask 255 255 255 7 Multicast IF 239 255 255 239 WLAN O amp M i audia Boundedte ehon SFM option Me Enabled Buffer size tf d 2 5m 12 Threshold i dBu Audio routing Timeout T e OSec Diagnostics Firu Audio level Statistics Get ood EFS 4 1 2 3 4 1 Command buttons 4 Discovery Use this command to auto detect all EtherMPX devicesin your network Your computer must be in the same su
10. r single IP radio links We need both programsat each TX ste Because two Encodersare operating in Multicast mode this is needed in orderto feed more than one Decoder these two streams must be logically separated inside the network To achieve this you need Ethe met switches that support VLANS You willneed to define separate VLANS one foreach radio program VLAN 10 for radio program 1 and VLAN 20 for radio program 2 In our example Even if you have isolated network segments you should define unique IP addressesto each device Note that the ports connected to IP radio links must be configured as trunk ports to allow all VLANsto passthrough The ports connected to Encoders amp Decoders must add the appropnate VLAN tagsto ingress traffic and discard VLAN tagson egress traffic 19 ElhermMPX ENCODER Unicast AUDIO 1 Ethernet Swilch 1 EtherMPX ENCODER 2 Unicast AUDIO 2 Example 2 RADIO LINK EtherMPX DECODER Ethernet Swilch 2 RADIO LINK EtherMPX D O D a Ethemoet Switch 3 Two different radio programs must be transported to two different TX sites over single IP radio links We need only one program ateach IX site To achieve this you can use ordinary plain Ethemet switches Because two Encodersare operating in Unicast mode each one Is paired to only one Decoder they can co exist in the same network without the need of VLANs Of course each device m
11. same network like 1 Encoder and 2 ormore Decoders you MUST change the IP addresses of the devices accordingly to avoid IP conflicts two devices with the same IP in the same network is never allowed If you have multiple networks or other traffic reaching the EtherMPX Encoder or Decoder you must filter it A recommended practice isto make network segmentation by using VLANs It is strongly recommended to use transparent bndge Ethemet links with sufficient bandwidth and low jitter in order forthe EtherMPX system to operate normally The latency delay vanance and fragmentation caused by routing is forbidden for real time traffic such as EtherMPX produces The required bandwidth for L R mode is roughly 2 5Mbit s and for MPX mode is roughly 4 8Mbit s The audio buffer size at the decoder side dependson the network jitter you have in yourtransmission network Select an appropnate buffer size to compensate the instability of your transmission network otherwise you will expenence audible audio artifacts clicks and pops due to packet loss or drops Always consider that an increased buffer size results into additional latency to the audio delivered 3 LCD menus From the LCD menusthe usercan view or modify some basic parameters descnbed below To control all system parameters you have to use the EtherMPX NMS Network Management System software To navigate through the menus You can use the UP and DOWN bu
12. sigmacom Broadcast TELECOM INNOVATIONS K USER MANUAL Ethe MPX v3 CE FE Wons Website http www sigmacom gr Contact info sigmacom gr Support suppot sigmacom gr K Sigmacom Broadcast TELECOM INNOVATIONS DOC UMENT REVIEWS Date Version Notes 01 Mar 2014 Initial release 20 Feb 2015 1 1 Rephrase of some sections 10 Mar 2015 Merged with SFN option User Manual K Sigmacom Broadcast TELECOM INNOVATIONS Dearcustomer After introducing our DDS 30 FM Exciter in 2010 the first in the word capable to accept Digital MPX MPX over AES it was time to solve another problem there was no Digital MPX SIL in the market Also the existing Analog MPX SILs could not meet ourhigh standardsin order to exploit the full capabilities of DDS 30 That s why we decided to design a Digital MPX SIL which could transport Digital MPX beside the classic analog MPX analog L R and digital L R over AES modes Since we are big fans of the everything IP concept we couldn t select something else than IP transmission In your hands you have the EtherMPxX IP SIL which is the result of our research and development Since version 3 an LCD user interface and SFN over IP capabilities added so you don t need GPS receivers any more Always with 24bit professional high end audio performance and minimal latency we could compare the performance of EtheMPX to a cable Even if EtherMPX is designed to be a perfec
13. solution 24 bit omen 2 x XLR 3 female balanced R L MPX Connector 1 x BNC female unbalanced MPX only 106dB 0 0005 3 47Vpp 4dBu for 0 dBFS Input BW 48kHz SR 0 1dB 20 kHz PTP IEEE 1588 lt 8nS accuracy Input BW 192kHz SR 0 1dB 80 kHz NOTE Technical specifications are subject to change without notice Please contact us if you have questions orto get latest information and updates Sigmacom Broadcast support suppor sigmacom gr orcall 302312209905 21
14. t to Ext and vice versa user must perfom a full power reset of the Encoder in orderto tnggera re sync state to all Decoders participating in the network The rear female BNC connector marked as 10MHz output provides 1OMHz 3 3Vpp CMOS signal AC coupled to dnve any other device needed In case you are using an extemal 1OMHz reference and tt Is lost the system switches into a st by mode no audio or SYNC packets are transmitted As a protection measure you cannot modify Int Ext clock selection from the NMS software only local modifications are allowed To tum on the PIP operation switch the SFN selection to On this can be modified from the front panel menu or the NMS see previous sections When enabled the PIP mechanism is sending every 2 seconds a UDP port 319 SYNC message with a destination multicast IP of 224 0 1 129 The time stamping engine is capable of 8nS discnmination e Decoder To tum on the PIP operation switch the SFN selection to On this can be modified from the front panel menu or the NMS see previous sections When enabled the device captures SYNC messages and the PTP algonthms process them on the fly and apply corrections to the local clock After a short 15 30 minutes to a medium 30 60 minutes penod of time the averaging enor should be minimized and the LOMHz output of the Decoder will be in close sync to the Master Clock Encoder The accuracy and s
15. t match with our DDS 30 FM Exciter you can use it to deliver analog MPX to any other exciter and you will notice immediately the difference Compared to any analog FM SIL So enjoy using your EtherMPX and thank you for selecting us for your business Sigmacom Broadcast March 2014 Contents Page 1 Hardware descnption 5 a The front panel 5 b The rear panel Encoder 5 c The rearpanel Decoder 6 2 Installation instructions 7 a Encoderconnections 7 b Decoderconnections 7 c Audio level adjustments 7 d Rearpanel LED indicators 7 e Front panel LED indicators 8 f Default settings 8 g Network considerations 8 3 LCD menus 9 a Navigate the menus 9 b Modify parameters 9 c The operational mode menu 9 d The audio level menu 10 e The network settings menu 10 f The system information menu 11 4 NMS Description 12 a Command buttons 12 b Devices list 13 c Device properties 13 d Silence Detector configuration 14 e Diagnostics 15 5 SFN Option 17 a Operation pnncipals 17 b Encoder 17 c Decoder 18 6 Implementation examples 19 a Multicast with VLANs 19 b Unicast 20 7 Technical specifications 21 1 Hardware description The front panel Encoder Decoder oN LC D Display 20x4 characters Navigation buttons UP DOWN OK Monitor output 1 4 TRS Female jack Status LEDs ACT LINK PWR The rear panel Encoden MITTITI 12 3 l Zi 3 4 oF 6 re 8
16. tability of the synchronization heavily depends on the intermediate network elements such as Ethemet switches wireless IP links etc The environment temperature can also affect the accuracy and stability of synchronization If after 1 hour of operation the Clock Difference counter see Statistics section above is over 100nS then you need to investigate what causes this insta bility in your network Also an excess of 10 1 ratio between Good PIP Sync and Bad PTP Sync also indicates a network issue that disturbs the operation of the PIP mechanism In cases where excessive latency fluctuations occur like WiFi links the PTP algonthms cannot handle it and synchronization is extremely poor We are constantly trying to improve our PIP algonthms so please consult our support team for further information 18 6 Implementation examples gt EtherMPX lt RADIO LINK EtherMPX O ENCODER 1 DECODER 1 O S Multicast O a lt allie Ethernet of Ethernet gt lt Swilch fF s Swilch2 lt S with VLAN x 2 with VLA gt N support S H support N Q ONEA f EtherMPX O O ENCODER 2 ad gt DECODER 2 O lt Multicast Q oe m lt Z z 5 3 oO O lt Qz EtherMPX DECODER 3 AUDIO 1 Ethemet Switch 3 with VLA support VLAN 19 TRUNK PORT EtherMPX DECODER 4 AUDIO 2 VLAN 20 Example 1 Two different radio programs must be transported to two different TX sites ove
17. ttons in the front panel to navigate through the User Interface menus displayed in the LCD To modify a parameter Press once the OK button and a blinking cursor should appear in the screen Use the UP and DOWN arrow buttons to move the cursoroverthe parameter you want to modify When you set the cursoroverthe desired parameter click once again the OK button Now you can use the UP and DOWN buttons to modify the parameter When done click OK button again A confirmation menu appears SAVE Y N where you can select Y if you want to apply and save the new settings or N to discard any changes you made If you don t push any button within 30 seconds the system discards any changesand retumsto the main menu 1 Menu Operational mode Format Enc amp Dec Select the audio format you need to transport through EtherMPxX You can select between MPX or L R Source Enc only Select the source port of the Encoder You can select between Analog or Digital AES EBU input IP Mode Enc only Select the transmission mode If you want to feed only one EtherMPX Decoder in your network select Unicast If you need to feed more than one Ethe MPX Decoders simultaneously select Multicast Destination IP 239 255 255 239 10 2 Menu Audio level A Displays the audio level of MPX channel B Displays the audio level of Right channel only
18. ust also have a unique IP address Note AUDIO AUDIO 2 These are only two mere examples The flexibility and the possibilities of using EtherMPX overan IP network are endless If you need any assistance on designing your own transmission network please do not hesitate to consult us 20 7 Technical specifications Output name Output type Analog electrical interface 2 outputs 2 x XLR 3 male balanced R L MPX Audio sample rate 192kHz internal for Analog MPX input Connector 1 x BNC female unbalanced MPX only L R mode 5mS up to 40mS on busy net 1 kOhm Audio latency MPX mode 2 5mS up to 20mS on busy DAC resolution 24 bit L R mode 2 37 Mbit s typ DAC sample rate 48kHz for L R output 192kHz for A MPX Network usage MPX mode 4 74 Mbit s typ Stereo 1 4 Female jack in front panel None Linear PCM 8 24bit for Digital L R amp MPX input 24bit for Digital L R amp MPX output Audio resolution 24bit for Analog L R amp MPX output 8 192kHz input for Digital L R input 174 192kHz input for Digital MPX input 48kHz internal for Analog L R input 108dB 0 0004 at 48kHz L R out DAC THD N 96dB 0 0015 at 192kHz A MPX out DAC SNR 129dB at 48 or 192kHz DAC Dynamic range 129 dB A weighted at 48 or 192kHz 124 dB at 48kHz L R output Channel separation Infinite at 192kHz A MPX output 3 47Vpp 4dBu for 0 dBFS Out BW 48kHz SR 0 1dB 21 8 kHz Out BW 192kHz SR 0 1dB 87 2 kHz Se a re
19. w 18d Bu for 20 consecutive seconds the Silence Detector will assume that the audio over IP is lost and will bndge the AUX IN to the MPX OUT connector When the audio level is restored above 18d Bu for 5 consecutive seconds the Silence Detectorassumesthat the audio over IP isOK and disconnects the AUX IN from the MPX OUT connector If your program haslong penodsof silence orlong pauses between songs and talent it isrecommended to set the audio routing of the Decoderto Force intemal 15 Note The 5 seconds restoration timer is factory fixed and cannot be modified by the user 4 Diagnostics When you have selected a device in the Devices list area you can use the following tools Ping response Click with your mouse this button to perfom an ICMP ping towardsto the IP address of the selected device The ping isonginating from yourcomputer IP address so it must be in the same subnet asthe device is lf there isa ping response the button tums in green colorand the response time is displayed If there isno response within a second the button tums into red color with a Failure caption Statistics Every EtherMPX device keeps statistical counters about Ethemet packets being transmitted or received If the SFN option is installed statistical counters about the synchronization performance are displayed Click on the Get button and a new window will appear see below statistics es SIGMACOM DECO
20. ync with the Master Clock Cases of gt 100nS difference indicate a network problem Possible Causes excessive latency fluctuations caused by Ethemet switches or wireless transmission Measured delay Only available if SFN option is installed and enabled The delay between local device and Master Clock device Reset Button Click this button to reset counters to zero A confirmation dialog appearsto venfy this operation Refresh Button Click this button to update the counters fetch from device Audio level This isan Encoder only functionality Thisisa real time VU meter which displays the audio level of the selected Encoder To start monitonng the audio level select the Encoderdevice you want and click the Play button on the top snp To stop the audio monitoning just click the Stop button next orselect some otherdevice from the Devices list Keep in mind that audio monitonng causesa reverse direction IP traffic of about 100 200kbit s 5 SAN Option This section refers to the SFN Option wherever is installed and enabled 17 Operation principals To construct a Single Frequency Network SFN a k a isofrequency network all devices must have a common reference clock in order to be synchronized A common practice is to use GPSDO or extemal GPS reference Clocks with a 1OMHz output in some cases with an additional 1PPS signal output also With the EthenMPX SFN Option you can have that 1LOMHz re
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