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4.4.1

Four Wire Audio Connectivity Examples

FWA-B

FWA-A

Audio

M_Lead

E_Lead

Audio

M_Lead

E_Lead

Audio

HSSI

output

input

sense

output

input

Embedded Audio

N/C

Single

Channel ‘Static’ Four Wire Audio Example.

Connectivity at FWA A and FWA B shows no E-Lead is required to allow audio to pass. Any
audio presented at one end will be transported to the other.

The FWA A and FWA B graphics show the internal state of the M-Leads as indicating activity
at all times.

Applicable to configuration selections 1 (channel 5), 5 (channel 5), and 6 (channels 5 and 6).

FWA-B

FWA-A

10 - 50 vDC

Audio

M_Lead

E_Lead

Audio

M_Lead

E_Lead

Audio

0 vDC

HSSI

output

input

sense

output

input

Embedded Audio

open

closed

Single Channel with E & M signalling Four Wire Audio Example. The intention is to

highlight E-Lead functionality.

Connectivity at FWA A shows no E-Lead signal therefore audio presented does not appear at
FWA B and the M-Lead is not energised.

Connectivity at FWA B shows a valid E-Lead signal and therefore audio passes to FWA A
and the M-Lead is energised.

Applicable to configuration selections 0 (channels 1 through 6) and 3 (Supports 2 audio
channels only, channels 5 and 6).

Содержание Four Wire Audio Interface

Страница 1: ...Four Wire Audio Interface Manual 2013 This document contains proprietary information that must not be provided or copied to third parties without express permission from MiMOMax Wireless Limited...

Страница 2: ...his literature and it is believed to be correct at the time of issue MiMOMax Wireless Ltd assumes no liability for errors or omissions or for any damages resulting from the use of this information Due...

Страница 3: ...DVANCED FEATURES 11 2 4 1 On Demand 11 2 4 2 Adaptive Modulation 11 2 5 BANDWIDTH REQUIREMENTS 12 2 5 1 Radio Unit Bandwidth 13 2 6 LATENCY 14 3 POWER 15 3 1 OVERVIEW 15 3 2 CABLING AND CONNECTIVITY 1...

Страница 4: ...O UNIT CONNECTIVITY 27 6 4 RADIO UNIT CONFIGURATION 28 7 FIRMWARE UPGRADES 30 8 PRE FIRMWARE VERSION 3 00 CONSIDERATIONS 31 8 1 LED INDICATION 31 8 2 AUDIO PORT OPERATION 31 8 3 CONFIGURATION 32 8 4 H...

Страница 5: ...s at 9600 baud The MiMOMax Four Wire Audio interface is provided for by an add on Network Interface Box NIB which communicates directly with a MiMOMax Radio Unit The Four Wire Audio interface is able...

Страница 6: ...for audio to pass dynamic and the other where the selected audio channels are in an always up configuration static The audio transport is achieved using a G726 32 kbps ADPCM Vo coder to offer low lat...

Страница 7: ...ain off Power LED orange On when power applied Off when no power is applied or a power fail condition exists HSSI LED green On when a valid connection is detected Flashing off to indicate HSSI port tr...

Страница 8: ...Available in 7 channel Mode ONLY either static or dynamic operation 2 3 CONFIGURATION Three basic modes of operation are provided 7 channel 3 channel and fixed channel Each of these modes will define...

Страница 9: ...ata No Control Header To minimize bandwidth requirements only audio data is passed end to end This places the limitations of no COM port data and only 2 audio channels Both channels when enabled confo...

Страница 10: ...ports 1 2 plus a single 9600 kbps UART channel 96000 7 RESERVED n a 8 9 A B C D Static 7 Channel Modes 8 1 Static audio channel port 1 plus 5 dynamic audio channels ports 2 3 4 5 6 plus a single 9600...

Страница 11: ...is still down the data is deleted 2 4 2 Adaptive Modulation Adaptive Modulation allows the Radio Link to scale its data throughput to that supported by the radio channel Under normal operation any sca...

Страница 12: ...0 6 Audio 224000 233600 3 Channel Mode Required Bandwidth bps Enabled Audio Channels No UART 9600 UART 2 0 Audio 0 19200 1 Audio 64000 64000 2 Audio 96000 96000 Fixed Channel Mode Required Bandwidth b...

Страница 13: ...or a complete list please refer to the About that MiMOMax Data Rate whitepaper As an example Radio Units set to 25 kHz 16 QAM connected to FWA interfaces with the CTRL selector set to 8 and a UART rat...

Страница 14: ...state Data latency 1ms end to end data delay Note E M Latency includes a de bounce delay of 5ms where the E Lead signal must be in a steady state for 5ms for that state to be recognised Therefore audi...

Страница 15: ...65 volt DC respectively with isolation of up to 1500 volts to board circuitry and unit ground being provided Where the Radio Units supply meets the above requirements it may also be used to power the...

Страница 16: ...32kbps ADPCM format Dynamic E M controlled and static always up E M independent channel operation is supported CODEC PROCESSING Transformer 600 ohm Audio Data Four Wire Audio Unit Transformer 600 ohm...

Страница 17: ...isolated switch for the output M Lead and an opto isolated current sense input E Lead The M Lead will present an on resistance of 40ohms when active and can support a load current of up to 100mA over...

Страница 18: ...3 Audio Input A Audio to FWA from Connected Equipment 4 Audio Output A Audio from FWA to Connected Equipment 5 Audio Output B Audio from FWA to Connected Equipment 6 Audio Input B Audio to FWA from Co...

Страница 19: ...t all times Applicable to configuration selections 1 channel 5 5 channel 5 and 6 channels 5 and 6 FWA B FWA A RU RU 10 50 vDC Audio M_Lead E_Lead Audio Audio M_Lead E_Lead Audio 0 vDC HSSI HSSI output...

Страница 20: ...ad Audio Audio E_Lead M_Lead Audio Audio E_Lead M_Lead Audio Multi Channel With E M Signalling Four Wire Audio Example The Intention Is To Show Differing Concurrent Configurations And The Resulting Au...

Страница 21: ...Inter Site Signalling for MPT systems The supported data rate is 9600 bps While no error correction or retry capability is provided an internal 256 byte buffer preserves data during Radio Unit link a...

Страница 22: ...gnal Ground Signal Reference 3 NOT USED 1 Output 232 compatible 7 NOT USED 1 Input 232 compatible 1 4 8 Signal Ground 1 Not Used Shield Ground Cable Shield NOTE 1 For early Four Wire Audio Units Seria...

Страница 23: ...a static state and not used Signalling levels over all HSSI connections conform to RS422 The rate of FWA interface frames from the FWA interface to the Radio Unit is 4kHz except when no ports are act...

Страница 24: ...ound Cable Shield For connection between the Radio Unit and FWA interface a one to one cable is used as defined in the following table Radio Unit signals conform to the DCE convention while the Four W...

Страница 25: ...d for audio to pass The COM port is designed to accommodate on demand operation so until it can be determined that the Air Interface is active data is buffered Therefore when testing the COM port with...

Страница 26: ...he FWA unit was part of a normal point to point system If a channel is configured for E M signalling then the E Lead signal is similarly required for audio to pass As the COM port will buffer the then...

Страница 27: ...he Four Wire Audio unit mounted in the rack mount tray The 2 M4x10 counter sunk screws attach the mounting bracket to the rack mount tray These are visible in the opposite image The 4 M4x8 pan head sc...

Страница 28: ...e refer to the MiMOMax Radio Installation and Operation Guide On the Configure Serial Interfaces CCMS web page the mode needs to be set to HSSI2 CCMS Screen Capture Showing HSSI2 Selection Following T...

Страница 29: ...Four Wire Audio Interface Manual CCMS Screen Capture Showing FWA Interface Status Display The CCMS Four Wire Audio status display is updated by selecting the Refresh button The status will NOT update...

Страница 30: ...terface Manual 7 FIRMWARE UPGRADES Firmware upgrades may only be performed at a MiMOMax Wireless service centre If you require a firmware upgrade please contact MiMOMax Wireless directly for the locat...

Страница 31: ...configured for static or fixed operation COM LED green Nominally off flashing on to indicate COM port activity both transmit and receive 8 2 AUDIO PORT OPERATION For pre version 3 00 firmware the oper...

Страница 32: ...ny additional supported dynamic channels may be used with an E Lead signal 7 RESERVED n a 8 9 A B C D Static 7 Channel Modes Six options are available utilizing all audio channels 1 through 6 8 1 Stat...

Страница 33: ...ta signals in each direction with the connections outlined in the above figure Circuit Overview and the following table RU to FWA interface HSSI Cable FWA unit RJ45 Radio Unit RJ45 Signal Pin Pin Sign...

Страница 34: ...pplication A radio link utilising adaptive modulation M CAM is NOT supported On the Configure Serial Interfaces CCMS web page the mode needs to be set to HSSI Serial Interfaces CCMS Web Page Showing H...

Страница 35: ...e Isolated DC DC converter Isolation 1500 volts Nominal Input Voltage 12 to 48 VDC Operational Input voltage 10 to 64 VDC Power 1 5 W Mechanical Dimension 38mm x 140mm x 258mm H x W x D Environmental...

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