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17

Reliability Considerations

Since  the  commentary  microphones  and  communications  are  typically  provided by 
this system, reliability is of primary concern.  The ADX-series products are designed 
with highest-quality components and conservative ratings so as to be as reliable as 
possible.

In  addition,  after  manufacture,  the  ADX  products  undergo  an  extensive  burn-in 
process which includes power and thermal cycling to attempt to precipitate out any 
early-life failures.

Even  with  these  precautions  failures  are  not  impossible,  and  in  addition  there  are 
other  components  to  the  system  such  as  Ethernet  switches  which  must  also  be 
considered in evaluating the overall reliability question.

Here are some thoughts on insuring a reliable on-air system:

Provide a spare  announce box and headset.    This  practice has been going 
on  for  decades  with  analog  systems,  and  it's  still  a  good  idea.    It  protects 
against failure of the ADX-120 and the headset.

Use  the  ADX-8000  to  provide  power  for  the  ADX-120s.    This  unit  contains 
redundant power supplies and will provide highly-reliable power, even in the 
event  of  the  failure  of  one  of  the  supplies.    The  dual  supplies  also  supply 
redundant power to the switch itself.

Insure  a  reliable AC  power source  in the  remote  location for  the  ADX units 
and for  the Ethernet switch.   If there is any question about the reliability of 
the AC supply you might consider using a small UPS power supply to provide 
battery  backup.    A  small  500  watt  unit  intended  for  personal  computer  use 
will provide an hour or more of operation in the event of power failure.

Use reliable Ethernet hardware such as switches, fiber  SFPs, etc.   Burn in 
new  switches  for  a  few  days  before  putting  them  on  the  air.    Keep  all 
Ethernet cables and fiber in good condition.

Many  switches have two or  more  fiber  SFP ports  available.  If  the switches 
support this type of operation (trunking), and most do, two fiber runs could be 
connected  between  switches,  thus  protecting  against  fiber  and  SFP  failure.  
The  ADX-8000  switches  support  trunking  and  are  compatible  with  most 
generic layer 2 switches.

It is possible to have a fully-redundant network operating in parallel with the 
primary network.  This of course requires two switches at each location, but 
provides a very high degree of reliability at moderate additional cost.  Contact 
Lance Design for more information about this type of operation.

(continued)

Summary of Contents for ADX-140

Page 1: ...ORKED AUDIO INTERFACE UNIT Cobranet Version Installation and Operation Manual Firmware Version 5 5 Lance Design 27 Fairview Avenue Ridgefield Connecticut 06877 Tel 203 894 8206 Fax 203 894 8207 www lancedesign com ...

Page 2: ... subjected to mechanical or electrical abuse or modification as determined by Lance Design and also that the equipment is returned to Lance Design with prior authorization No liability whatsoever is assumed for consequential damages resulting from the use or failure of this equipment This warranty is in lieu of all other warranties expressed or implied including any implied warranty of fitness for...

Page 3: ...r is also available An LED indicator adjacent to each XLR indicates phantom power or line in mode Inputs 1 and 2 appear as Mics 1 and 2 at the truck Inputs 3 and 4 appear as talkbacks 1 and 2 since these inputs make use of the paths used for talkback signals in the ADX 120s This does NOT represent any compromise in quality they are full quality paths and intended to be used for mics or other on ai...

Page 4: ...he hybrids two wire to four wire conversion are carefully designed to provide good bandwidth and noise performance as well as a high level of trans hybrid loss In addition there are noise gates implemented in the dsp to provide additional quieting Because the long distance portions of the intercom are transmitted via a digital path and in four wire format the PL performance far exceeds what is typ...

Page 5: ...nique system ID 01 99 The desired remote devices are designated in the ADX 2400 menu to be UNIT A UNIT B UNIT C and UNIT D for that ADX 2400 This is what determines the audio routing for example which microphone signal comes out of the Mic A1 output of the ADX 2400 The microphone signal that comes out of that output would be the headset mic Mic 1 from the ADX 120 which has its system ID switches s...

Page 6: ...Overload Condition 3 Sys System LED Green Normal No Faults Flashing Green Menu item changed Flash write pending Yellow Test Mode Internal Dipswitch Flashing Yellow Fault Condition Faults are either DC overload on any of the IFB or PL ports or that the ethernet port failover logic has selected the backup secondary port 4 Audio Link LED Off No audio packets being received Green Normal Audio packets ...

Page 7: ...gnments non interrupt program selection and IFB interrupt selection Each ADX 2400 can support up to four ADX 120s or ADX 140s thereby taking advantage of all 24 outgoing paths and all 24 incoming paths The ADX 120s and ADX 140s in use are distinguished from each other by the System ID numbers set on the switches on each unit and are assigned to be Unit A Unit B Unit C and Unit D in the ADX 2400 me...

Page 8: ...ire PL Port 1 Out Each PL channel at the ADX 120 140s Out 18 4 Wire PL Port 2 Out may be assigned to any of the 4 wire Out 19 4 Wire PL Port 3 Out ports Out 20 4 Wire PL Port 4 Out Out 21 4 Wire PL Port 5 Out Out 22 4 Wire PL Port 6 Out Out 23 4 Wire PL Port 7 Out Out 24 4 Wire PL Port 8 Out The ADX 2400N Physical Rear Panel Inputs are Input 1 IFB In 1 Each IFB output at the ADX140s may be fed Inp...

Page 9: ...140 units One physical input may feed multiple IFB outputs Physical PGM inputs at the truck to the various PGM outputs on the ADX 120 140 units One physical input may feed multiple PGM outputs Four wire PL Ports to the various PL channels on the ADX 120 140 units Any PL channel on the ADX 120 140s may be assigned to any four wire port The appropriate mix minus signals will automatically be generat...

Page 10: ...el outputs and the outputs sent to the network and thus to the remote devices The DELAY function is not available in announce booth mode 3 The Remote Device menus Each remote device ADX 120 140 has an internal menu which may be accessed remotely via the ADX 2400 These menus configure the hardware of the remote device itself and are specific to the particular model i e the ADX 120 has different opt...

Page 11: ...o do this press the MENU button once and select config items 1 2 3 and 4 respectively using the knob When the desired item is selected press the MENU SET button and select the appropriate System ID number for the ADX120 or ADX140 you want to assign Pressing either SET or MENU will take you back to the item select mode Note If you re using a combination of ADX120 and ADX140 units it s best to assig...

Page 12: ...es and you won t have to step backwards out of them ADX 140 Remote Menu Items The ADX 140 menu items for firmware version 1 0 are listed below These items may be accessed from the ADX 2400 front panel or via the RS 232 remote port on the ADX 140 front panel the Remote connector Config Item 01 Mic 1 Gain 25 70dB Config Item 02 Mic 2 Gain 25 70dB Config Item 03 Mic 3 Gain 25 70dB Config Item 04 Mic ...

Page 13: ...igured as 2 ch RTS format IFB1 on Ch1 PGM1 on Ch2 Dry IFB Configured as dry balanced 4 output of IFB 1 Dry PGM Configured as dry balanced 4 output of PGM 1 Dry Mic 1 Configured as dry balanced 4 output of Mic 1 Config Item 14 IFB 2 Mode Configures the IFB 2 output The selections are as follows Wet 2 Ch Configured as 2 ch RTS format IFB2 on Ch1 PGM2 on Ch2 Dry IFB Configured as dry balanced 4 outpu...

Page 14: ... connector Status Item 05 PL2 Voltage DC Voltage of PL2 power supply Nominally 25 volts Status Item 06 IFB1 Current DC Current drawn by the external IFB beltpacks powered by the IFB1 This should be less than 100 milliamps The IFB power supply will go into a shutdown condition if current is greater than 140 ma Status Item 07 IFB1 Voltage DC Voltage of IFB power supply Nominally 25 volts Note that i...

Page 15: ...ector The ADX 140 menus are also accessable via the RS 232 port in the Remote Control connector on the rear panel Although it s unlikely that you would need this function it allows configuration of the unit in a case where it might be operated with Cobranet hardware other than the ADX 2400 We also use it for test purposes in the shop The connector has a standard old fashioned PC modem pinout and w...

Page 16: ...nob The first 24 are the rear panel outputs These are referred to as Local outputs 1 24 1 8 are the Microphone outputs 9 16 are the Talkback outputs and 17 24 are the output side of the four wire PL ports The second 24 outputs are the Net outputs These are the signals which are fed to the Ethernet network and on the the ADX 120 140 units Net outputs 1 8 are the IFBs 9 16 are the PGM feeds and 17 2...

Page 17: ...t of the failure of one of the supplies The dual supplies also supply redundant power to the switch itself Insure a reliable AC power source in the remote location for the ADX units and for the Ethernet switch If there is any question about the reliability of the AC supply you might consider using a small UPS power supply to provide battery backup A small 500 watt unit intended for personal comput...

Page 18: ...m IFB 2 Output 2 channel wet RTS format or single channel dry 4dB nom PL Interface at ADX 140 2 channel wet RTS format DC current to support 3 beltpacks PL Interface Truck End 4 wire dry 4dBm nominal 8 assignable 4W Ports PL Trans hybrid Loss Greater than 55 dB at 440Hz Remote Control From ADX 2400 front panel or via RS232 Remote connector Front Panel Switches System ID two digit rotary switches S...

Page 19: ...ire PL Port 3 Out ports Out 20 4 Wire PL Port 4 Out Out 21 4 Wire PL Port 5 Out Out 22 4 Wire PL Port 6 Out Out 23 4 Wire PL Port 7 Out Out 24 4 Wire PL Port 8 Out The ADX 2400 Physical Rear Panel Inputs Input 1 IFB In 1 Each IFB output at the ADX140s may be fed Input 2 IFB In 2 from any of the eight physical IFB inputs Input 3 IFB In 3 Input 4 IFB In 4 Input 5 IFB In 5 Input 6 IFB In 6 Input 7 IF...

Page 20: ...CH 11 9 CH 19 9 CH 3 SHLD 22 CH 11 SHLD 22 CH 19 SHLD 22 CH 4 7 CH 12 7 CH 20 7 CH 4 20 CH 12 20 CH 20 20 CH 4 SHLD 8 CH 12 SHLD 8 CH 20 SHLD 8 CH 5 18 CH 13 18 CH 21 18 CH 5 6 CH 13 6 CH 21 6 CH 5 SHLD 19 CH 13 SHLD 19 CH 21 SHLD 19 CH 6 4 CH 14 4 CH 22 4 CH 6 17 CH 14 17 CH 22 17 CH 6 SHLD 5 CH 14 SHLD 5 CH 22 SHLD 5 CH 7 15 CH 15 15 CH 23 15 CH 7 3 CH 15 3 CH 23 3 CH 7 SHLD 16 CH 15 SHLD 16 CH ...

Page 21: ...Remote port is 38 4K Baud One Stop Bit No Parity GPIs 1 and 2 may be used to implement a talkback function for the first two mic inputs They may be controlled with a hand held pushbutton switch for example If GPI 1 is closed to ground switch between pins 5 and 6 on the connector Mic 1 is muted on its normal path and routed to the mic 3 TB1 path A rapidly flashing yellow LED adjacent to the Mic 3 c...

Page 22: ...22 NOTES ...

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