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Polycom MX392 - page 1
Using the Shure® MX392 Push to Talk Microphone with Vortex® Devices Application Note Polycom Installed Voice Business Group September 2004 Rev. B ...
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Polycom MX392 - page 2
Table of Contents TABLE OF CONTENTS .............................................................................................................. ........... 2 SHURE MX3 92 BASI CS ....................................................................................................................... 3 Logic Port ................................... ...
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Polycom MX392 - page 3
S HURE ® MX392 B ASICS The Shure MX392 is a surface-mount, electret microphone that includes a programmable membrane on/off switch that can be controlled externally via logic input / output terminals. This application note explores how to connect the MX392 to a Vortex device (EF2280, EF2241, EF2201, EF2210, or EF2211) as well as how to program the ...
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Polycom MX392 - page 4
Switch Behavior User Action Required / LED Behavior DIP Switch Settings Push to Mute, Release to Talk (As Shipped) Press and hold switch to temporarily mute microphone; release switch to unmute. LED on when microphone is active. S1 = OFF S2 = OFF S3 = OFF S4 = OFF Push to Talk, Release to Mute Press and hold switch to activate microphone; release s ...
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Polycom MX392 - page 5
Here is a drawing showing the functionality that is assigned to each DIP Switch: 5 ...
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Polycom MX392 - page 6
L OGIC P ORT The Logic Input port is a female DB-25 connector where pins 1-24 can be programmed to execute commands via the Logic Input page. Pin 25 is the ground pin and it can sink up to 500 mA of current. The Logic Output port is a female DB-25 connector where pins 1-20 can be programmed. Pins 21- 25 are ground pins. Each pin can source up to 20 ...
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Polycom MX392 - page 7
P HYSICAL C ONNECTIONS AND G ROUNDING In order to connect the microphone to the Vortex Device, first connect the audio portion of the microphone to the Vortex Device: Connect the Positi ve conductor (Red) to the Positive terminal, the Negative conductor (Black) to the Negative ter minal, and the Ground wire (gray) to the Ground terminal. Next, conn ...
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Polycom MX392 - page 8
T OGGLE O PERATION (P USH TO T ALK ) Let's say that you want MX392 to be muted by default. If someone pushes the membrane switch, you want the microphone to stay unmuted until the user presses the switch to mute the microphone. You also want the LED to illuminate when the microphone is unmuted. First, set DIP Switch S1, S2, and S3 to ON and se ...
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Polycom MX392 - page 9
Now, right click in the A CTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O FF . Now, whenever the switch goes Active Low (0V DC), the Vortex Device will unmute Input 1. Now, right click in the D EACTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O N . Now, whenever the switch g ...
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Polycom MX392 - page 10
Make sure that the physical wiring works by pressing the membrane switch. You should see the LED above the pin assignment lit in green: Repeat the above process for each MX392 microphone that you want to connect to the Vortex Device. L OGIC O UTPUT Go to the Logic Output page of Conference Com poser. If the LED IN wire is connected to Logic Output ...
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Polycom MX392 - page 11
Next, right click in the A CTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O FF . Now, whenever the microphone is unmuted (Mute = False), the LED will illuminate on the MX392. Next, right click in the D EACTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O N . Now, whenever the m ...
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Polycom MX392 - page 12
Make sure the LED works as designed. If you press the membrane switch, you should see the LED above the pin illuminate in Conference Composer as well as on the MX392. Since the switch is a toggle switch, the LED will stay lit until the switch is pushed again: When the membrane switch is pushed again, the Vortex Device toggles the state from unmuted ...
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Polycom MX392 - page 13
T OGGLE O PERATION (P USH TO M UTE ) Let's say that you want MX392 to be unmuted by default. If someone pushes the membrane switch, you want the microphone to stay muted until the user presses the switch to unmute the microphone. You also want the LED to illuminate when the microphone is unmuted and not illuminate when the microphone is muted. ...
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Polycom MX392 - page 14
Now, right click in the A CTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O N . Now, whenever the switch goes Active Low (0V DC), the Vortex Device will mute Input 1. Now, right click in the D EACTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O FF . Now, whenever the switch goe ...
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Polycom MX392 - page 15
Repeat the above process for each MX392 microphone that you want to connect to the Vortex Device. L OGIC O UTPUT Go to the Logic Output page of Conference Com poser. If the LED IN wire is connected to Logic Output pin 1, then you need to assign Pin 1 by left-c licking the desired pin in the DB-25 graphic. The pin will turn color from gray to pink. ...
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Polycom MX392 - page 16
Next, right click in the D EACTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O N . Now, whenever the microphone is muted (Mute = True), the LED will not illuminate on the MX392. Here is what the screen should look like when you are finished: Make sure the LED works as designed. If you press the membrane switch, y ...
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Polycom MX392 - page 17
When the membrane switch is pushed again, the EF Device toggles the state from unmuted to muted. Now, the LED should not be illuminated since the input from the MX392 is now muted. Both LED's (Conference Composer and MX392) should not be illuminated: T OGGLE O PERATION M UTE A LL E XAMPLE Let's say that you have 2 Vortex units linked toge ...
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Polycom MX392 - page 18
M ACROS Go to the M ACROS page of Conference Composer. To make things easy, label Macro 0 as MUTE ON and label Macro 1 as MUTE OFF. Then, for each microphone that is physically connected to the Vortex, add commands to Macro 0 that mute the microphones and add commands to Macro 1 that unmute the microphones. When you're done, this is what the M ...
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Polycom MX392 - page 19
In order for one microphone to mute all microphones, we need to be able to mute and unmute the microphones on all units regardless of whether a microphone is muted from the Vortex EF2280 or the EF2241. To accomplish this, we will use the BROADA command to send MUTEI commands from one unit to the other unit. The BROADA command broadcasts any command ...
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Polycom MX392 - page 20
Repeat that same process for Inputs 2-4 of the Vortex EF2241. The, perform the same procedure to unmute Inputs 1-4 on the Vortex EF2241. Remember that there is a colon after the BROADA command. When you are finished, here is what the Macros page should look like: 20 ...
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Polycom MX392 - page 21
Follow the same procedure for muting the Inputs 1-8 on the Vortex EF2280 from the EF2241. Here is what the Macros page for the Vortex EF2241 should look like when you are finished: L OGIC I NPUT Go to the Logic Input page of Conference Composer. If the SWITCH OUT wire is connected to Logic Input pin 1, then you need to assign Pin 1 by left-clicking ...
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Polycom MX392 - page 22
Now, place the cursor in the A CTIVATED C OMMAND column for Logic Input 1 and select I NSERT , M ACRO , 0 ("MUTE ON"). Now, whenever the switch goes Active Low (0V DC), the Vortex Device will execute Macro 0. Now, right click in the D EACTIVATED C OMMAND column for Logic Input 1 and select I NSERT , M ACRO , 1 "(MUTE OFF"). Now, ...
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Polycom MX392 - page 23
Repeat the process for each microphone that is connected to the Logic Input port. If you are successful, you should see this on the screen (the screenshot is from a Vortex EF2241): Make sure that the physical wiring works by pressing the membrane switch. You should see the LED above the pin assignment lit in green: L OGIC O UTPUT Go to the Logic Ou ...
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Polycom MX392 - page 24
Next, right click in the A CTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O FF . Now, whenever the microphone is unmuted (Mute = False), the LED will illuminate on the MX392. Next, right click in the D EACTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O N . Now, whenever the m ...
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Polycom MX392 - page 25
Make sure the LED works as designed. If you press the membrane switch, you should see the LED above the pins illuminate in Conference Composer as well as on every MX392. Since the switch is a toggle switch, the LED will stay lit until the switch is pushed again: When the membrane switch is pushed again, the EF Device toggles the state from unmuted ...
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Polycom MX392 - page 26
L OGIC I NPUT Go to the Logic Input page of Conference Composer. If the SWITCH OUT wire is connected to Logic Input pin 1, then you need to assign Pin 1 by left-clicking the desired pin in the DB-25 graphic and selecting the pink color (The pink color means that the pin is not grouped to other pins). Now, right click in the A CTIVATED C OMMAND colu ...
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Polycom MX392 - page 27
Now, right click in the H ELD C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O FF . Now, whenever the switch goes Active Low (0V DC), the Vortex Device will unmute Input 1. If you are successful, you should see this on the screen: Make sure that the physical wiring works by pressing and holding the membrane switch. You s ...
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Polycom MX392 - page 28
L OGIC O UTPUT Go to the Logic Output page of Conference Com poser. If the LED IN wire is connected to Logic Output pin 1, then you need to assign Pin 1 by left-c licking the desired pin in the DB-25 graphic. The pin will turn color from gray to pink. Next, ri ght-click on the pin and reverse the polarity. A horizontal bar should appear under the p ...
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Polycom MX392 - page 29
Next, right click in the D EACTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O N . Now, whenever the microphone is muted (Mute = True), the LED will not illuminate on the MX392. Here is what the screen should look like when you are finished: Make sure the LED works as designed. If you press the membrane switch, y ...
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Polycom MX392 - page 30
When the membrane switch is pushed again, the EF Device toggles the state from unmuted to muted. Now, the LED should not be illuminated since the input from the MX392 is now muted. Both LED's (Conference Composer and MX392) should not be illuminated: M OMENTARY O PERATION (P USH TO M UTE ) Let's say that you want MX392 to be unmuted by de ...
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Polycom MX392 - page 31
L OGIC I NPUT Go to the Logic Input page of Conference Composer. If the SWITCH OUT wire is connected to Logic Input pin 1, then you need to assign Pin 1 by left-clicking the desired pin in the DB-25 graphic and selecting the pink color (The pink color means that the pin is not grouped to other pins). Now, right click in the A CTIVATED C OMMAND colu ...
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Polycom MX392 - page 32
Now, right click in the H ELD C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O N . Now, as long as the switch is Active Low (0V DC), the Vortex Device will mute Input 1. If you are successful, you should see this on the screen: Make sure that the physical wiring works by pressing and holding the membrane switch. You shou ...
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Polycom MX392 - page 33
L OGIC O UTPUT Go to the Logic Output page of Conference Com poser. If the LED IN wire is connected to Logic Output pin 1, then you need to assign Pin 1 by left-c licking the desired pin in the DB-25 graphic. The pin will turn color from gray to pink. Next, ri ght-click on the pin and reverse the polarity. A horizontal bar should appear under the p ...
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Polycom MX392 - page 34
Next, right click in the D EACTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O N . Now, whenever the microphone is muted (Mute = True), the LED will not illuminate on the MX392. Here is what the screen should look like when you are finished: Make sure the LED works as designed. If you press the membrane switch, y ...
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Polycom MX392 - page 35
When the membrane switch is pushed again, the Vortex Device toggles the state from unmuted to muted. Now, the LED should not be illuminated since the input from the MX392 is now muted. Both LED's (Conference Composer and MX392) should not be illuminated: M OMENTARY O PERATION M UTE A LL E XAMPLE t's say that you have 2 Vortex units linked ...
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Polycom MX392 - page 36
o to the M ACROS G an page of Conference Composer. To make things easy, label Macro 0 as MUTE ON acro 1 d label M as MUTE OFF. Then, for each microphone that is physically connected to the Vortex, add commands to Macro 0 that mute the microphones and add commands to Macro 1 that unmute the microphones. When you're done, this is what the Macros ...
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Polycom MX392 - page 37
microphones on all units regardless of whether a microphone is muted from the Vortex EF2280 or the Vortex EF2241. To accomplish this, we will use the BROADA command to send MUTEI commands from one unit to the other unit. The BROADA command broadcasts any comman is after the colon. For example, if a Macro in the Vortex EF2241 has this command: d tha ...
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Polycom MX392 - page 38
Follow the same procedure for muting the Inputs 1-8 on the Vortex EF2280 from the EF2241. Here is what the Macros page for the Vortex EF2241 should look like when you are finished: 38 ...
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Polycom MX392 - page 39
L OGIC I NPUT Go to the Logic Input page of Conference Composer. If the SWITCH OUT wire is connected to Logic Input pin 1, then you need to assign Pin 1 by left-clicking the desired pin in the DB-25 graphic and selecting the pink color (The pink color means that the pin is not grouped to other pins). 39 ...
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Polycom MX392 - page 40
Now, place the cursor in the A CTIVATED C OMMAND column for Logic Input 1 and select I NSERT , M ACRO , 0 ("MUTE ON"). Now, whenever the switch goes Active Low (0V DC), the Vortex Device will execute Macro 0. Now, right click in the D EACTIVATED C OMMAND column for Logic Input 1 and select I NSERT , M ACRO , 1 "(MUTE OFF"). Now, ...
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Polycom MX392 - page 41
Now, right click in the H ELD C OMMAND column for Logic Input 1 and select I NSERT , M ACRO , 0 "(MUTE ON"). Now, as long as the switch is held down, the Vortex Device will execute Macro 0. Repeat the process for each microphone that is connected to the Logic Input port. If you are successful, you should see this on the screen (the screen ...
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Polycom MX392 - page 42
L OGIC O UTPUT Go to the Logic Output page of Conference Com poser. If the LED IN wire is connected to Logic Output pin 1, then you need to assign Pin 1 by left-c licking the desired pin in the DB-25 graphic. The pin will turn color from gray to pink. Next, ri ght-click on the pin and reverse the polarity. A horizontal bar should appear under the p ...
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Polycom MX392 - page 43
Next, right click in the D EACTIVATED C OMMAND column for Logic Input 1 and select I NSERT , I NPUT , 1, M UTE , O N . Now, whenever the microphone is muted (Mute = True), the LED will not illuminate on the MX392. Here is what the screen should look like when you are finished (assuming a Vortex EF2241): Make sure the LED works as designed. If you p ...
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Polycom MX392 - page 44
T ECHNICAL S UPPORT For support on the Vortex product line, call toll -free (USA/Canada) 888-248-4143, then select option 1, then option 3. For exclusive Integrator and Consultant focused support (through our PASS program), dial 1.408.474.2048; this number will get you help on video and Vortex products. For general technical support, dial 1.800.POL ...
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