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I

NSTALLATION

© Polycom, Inc.

11

V

ORTEX

 EF2280

 

Reference Manual

I

NSTALLATION

This equipment is intended to only be installed by qualified service personnel. 

The equipment shall be connected to a socket-outlet that provides a protec-

tive earthing connection.

North American 

Requirement

CAUTION-To reduce the risk of fire, use only No. 26 AWG or larger telecom-

munication line cord.

M

OUNTING

 

THE

 EF2280

The EF2280 can be mounted in a rack enclosure using four large screws (10-

32x1/2”) included with the unit. One EF2280 fits in a single rack space.

Recommendation 

For Easy Access

While not required, leave a single rack space in between the EF2280 and 

other units in your rack. This gives you easier access to the back panel. If you 

cannot leave a single rack space, mount the EF2280 

below

 units that are lon-

ger in length so that you can access the Phoenix connectors on the back 

panel more easily.

Instructions for 

Securing Power 

Supply to Back of 

EF2280

•

Locate the cable clamp on the back panel of the EF2280 above the RS-

232 port.

•

Remove the screw and thread the power cord through the cable clamp.

•

Attach the cable clamp to the back panel of the EF2280 and tighten the 

screw. Align the clamp so that the power cable does not interfere with the 

connectors on the EF2280 back panel.

•

Plug in the power supply.

•

We recommend that you also Ty-wrap the power supply to the rack. The 

purpose of securing the power supply to the back panel is so that if the 

power supply were to drop, it would pull where the cord is attached with 

the cable clamp and not pull the plug out of the EF2280.

C

ONNECTING

 

THE

 EF2280 

TO

 O

THER

 E

QUIPMENT

Grounding

The EF2280 has 8 mic/line inputs plus 4 line level inputs and 12 line level out-

puts. Each input/output is “Pin 1 compatible” — this means that the ground 

pin of each input/output is tied to chassis ground. Chassis ground is con-

nected to the input power ground.

Caution! 

Do not use any other power supply other than the one provided with 

this unit.

Содержание Vortex EF2280

Страница 1: ...Vortex EF2280 Reference Manual...

Страница 2: ......

Страница 3: ...29 Input Settings 29 Calibration 29 Build Your Echo Canceller Reference 31 Echo Canceller Reference for Multiple Vortex Devices 31 Configure the Automatic Microphone Mixer 33 Automixer Settings for M...

Страница 4: ...VORTEX EF2280 REFERENCE MANUAL Polycom Inc Copyright 2004 2 Technical Support 800 795 9266...

Страница 5: ...y Information Definition of Terms explains terms used in this manual as well as terms used in our technology of echo cancellation noise cancellation and audio conferencing About the EF2280 The EF2280...

Страница 6: ...tion will help us to provide you with better customer support and will allow us to notify you with updated product features and software PRODUCT FEATURES Product Front panel LCD for controlling and co...

Страница 7: ...trol RS 232 port for remote control Reconfigurable parallel logic input output EF bus for linking multiple Vortex devices Digital bus with 4 audio busses 48 kHz sampling rate Up to 8 Vortex EF2280 dev...

Страница 8: ...INTRODUCTION VORTEX EF2280 Reference Manual 6 Technical Support 800 765 9266...

Страница 9: ...duct package but may be necessary to create a completely functional system Microphones Loudspeakers Audio amplifier or amplified loudspeaker Vortex Phone Hybrid EF2201 EF2211 EF2241 Audio cables Video...

Страница 10: ...values 5 ESC Returns to the next highest level of menus 6 HOME Returns to the top of the menu structure 7 LEVEL INDICATOR Indicates the level of the selected channel or parameter 8 CHANNEL ACTIVITY LE...

Страница 11: ...th the EF2280 15 MIC LINE INPUTS Connects to microphone at either mic or line level with or without phantom power 16 LINE INPUTS Inputs A D at line level 17 LINE OUTPUTS Outputs 1 8 at line level A D...

Страница 12: ...PRE INSTALLATION VORTEX EF2280 Reference Manual 10 Technical Support 800 765 9266...

Страница 13: ...asily Instructions for Securing Power Supply to Back of EF2280 Locate the cable clamp on the back panel of the EF2280 above the RS 232 port Remove the screw and thread the power cord through the cable...

Страница 14: ...80 In 1 In 2 In 3 In 4 In 5 In 6 In 7 In 8 Out 1 Out 2 Out 3 Out 4 Out 5 Out 6 Out 7 Out 8 In A In B Out A Out B In D Out C Out D In C EF2201 Video CODEC Line In Line Out PSTN EF Bus 6 RS 232 PIN 2 TX...

Страница 15: ...as the P bus Up to 8 devices can transmit on the W X Y and Z busses Similarly up to 8 devices can transmit on the P bus Note that the EF2241 counts as one of both types CONNECTING MULTIPLE Vortex Dev...

Страница 16: ...WER ON PRE Figure 7 Legacy Vortex EF2280 products SKU 2200 82280 xyz require an EF Bus terminator when linked at either end of a Vortex chain EF2280 s that have their audio input and output connectors...

Страница 17: ...e 500 ms Last Mic On Mode On on Automixer 1 Max NOM per Automixer 8 Off Attenuation 15 dB INPUT CHANNELS Acoustic Echo Cancellation On Automatic Gain Control AGC On Automixer 1 Echo Canceller Referenc...

Страница 18: ...put gain should be adjusted so that you get a 0 dBu level i e adding 8 dB of gain Check Levels to the Codec Configure the matrix mixer output to the codec input The output gain of the matrix mixer sho...

Страница 19: ...ust the placement of the microphone relative to the loudspeaker Configure Program Audio Sources Set the gains on the matrix mixer inputs from the program audio sources so that program audio is played...

Страница 20: ...INSTALLATION VORTEX EF2280 Reference Manual 18 Technical Support 800 765 9266...

Страница 21: ...1 Summary of button functions on the EF2280 Vortex EF2280 System Settings Parametric EQ Automixer Outputs Inputs 1 8 A D System Bus Reference Error Messages Acknowledgement Mode Front Panel Password...

Страница 22: ...value The parameter is instantly updated while it is being adjusted you should hear changes as the parameter is changing RS 232 control strings are also sent via the RS 232 port so your remote control...

Страница 23: ...Selects the Device ID of the unit Baud Rate Selects baud rate of the RS 232 Flow Control Selects flow control between Hardware None or Auto LCD Contrast Controls the contrast level of the front panel...

Страница 24: ...ly for Inputs 1 8and T Gain This parameter adjusts the gain level of the 12 inputs This is nor mally configured during the calibration process The default setting is 15 dB for microphone signals and 0...

Страница 25: ...n applied to each output signal using this parameter The default setting is 0 dB Though the EF2280 allows for pos itive output gain you should always try to adjust input gains to a good level so that...

Страница 26: ...ld Time This is the amount of time the microphone stays On after the energy in the channel drops below the gating threshold The default value is 500 msec The range is 1 to 5000 msec Microphone channel...

Страница 27: ...Bus ID Off Attenuation Sets the Off Attenuation in dB for the specified auto mixer Setting this value to 18 would result in the microphone signals being attenuated by 18 dB when gated off This value...

Страница 28: ...e all microphones set to priority 1 If Chairman Mode is enabled all microphones including ones with priority of 1 will be gated off when the Chairman mic gates on MATRIX MENU The MATRIX contains comma...

Страница 29: ...Hz and 20 000 Hz in 1 Hz steps Bandwidth in dB octave between 1 and 24 dB octave but is always less than or equal to 1 2 x Gain Gain in dB between 20 and 20 in 1 dB steps Lowpass Cutoff Frequency in...

Страница 30: ...6 47 Factory presets Pre set 0 15 cannot be overwritten Delete Deletes the selected user preset Presets 16 47 Factory Presets Presets 0 15 cannot be deleted MACROS Run Macro 0 255 Allows you to run ma...

Страница 31: ...er Control Software See the Conference Composer User Guide Phantom power should be turned On for condenser and electret microphones CALIBRATION When using the factory default Preset 0 the following ca...

Страница 32: ...pment The line inputs have a maximum nominal level of 0 dBu If your incoming line level inputs have a higher nominal level than 0 dBu you will want to use an analog pad to remove the level Figure 20 A...

Страница 33: ...ated by 3 dB as well as any other audio that is going to your loud speaker If you are using crosspoint gains in the loudspeaker mix apply the same gains to the signals in your reference If your system...

Страница 34: ...and 1 Polycom VS4000 video codec The originating sources for far end audio is EF2280 with ID 0 The Matrix for this EF2280 in Conference Composer is shown in Figure 12 and the EF Bus page in Figure 13...

Страница 35: ...n does not activate microphones in two different zones which they would tend to do if each zone had its own automatic mixer Use both automatic mixers when the EF2280 is split to operate independently...

Страница 36: ...the result of Hold Time values that are too high Camera Gating Threshold Specifies the hold time for camera gating information Camera gating information can be used to position a camera by using the g...

Страница 37: ...th Threshold Type Sets adaptive or manual automatic gating thresholds per input The default is adaptive Gating Mode Sets the automixer gating control mode for specified input channel The possible mode...

Страница 38: ...her on the AUTOMIXER page in Conference Com poser or on the MATRIX MIXER page The BUS MIXER parameter is used to assign one of the two internal automixers to one of the EF Bus automixer groups For exa...

Страница 39: ...signer software will do these tasks for you automatically 1 Assign Inputs Assign each audio source to an input Remember to include the conferencing equipment such as a Vortex Phone Hybrid or a video c...

Страница 40: ...Y and Z busses of the other devices for a total of 12 mixes The mixes can have crosspoint gains on the signals from the other devices See Figure 26 below All 12 mixes become inputs to the main matrix...

Страница 41: ...se the EF Bus Reference For systems with more than one room you will need to use the W X Y or Z sub busses to share the echo canceller reference in your additional rooms if the EF Bus Reference has al...

Страница 42: ...INTEGRATING THE EF2280 INTO YOUR SYSTEM VORTEX EF2280 Reference Manual 40 Technical Support 800 765 9266...

Страница 43: ...the Adaptive Threshold if the Gate Threshold is set to Adaptive or adjust the Manual Threshold if the Gate Threshold is set to Manual For Adaptive Gate Threshold set the Adaptive Threshold lower so t...

Страница 44: ...m s microphones to the local output with the matrix but do not add them to the echo canceller reference For more specific guidelines on what to include in your echo canceller reference see Build Your...

Страница 45: ...he echo that the remote end is hearing goes away when a particular channel is muted If you find that the echo goes away when a particular channel is muted the microphone may not be calibrated correctl...

Страница 46: ...nal is too low the room audio amplifier is usually used to com pensate and bring the room audio to an acceptable level For example if the reference signal is 12 dB too low the room audio will need to...

Страница 47: ...not too high Run the built in EF2280 Room Gain test to verify that you do not have room gain problems See Verify Room Gain on page 16 In Conference Quick Check If you experience residual echo problems...

Страница 48: ...analogous to rais ing the background noise level in the room Because this noise is uncorrelated with the echoes within the room the EF2280 s ability to adapt and cancel echoes will be less than optim...

Страница 49: ...ties The EF2280 may not adapt under these conditions and echoes may be heard If the loudspeaker has a bass control lower it Excessive bass can cause a boomy effect that is nonlinear In addition excess...

Страница 50: ...TROUBLESHOOTING VORTEX EF2280 Reference Manual 48 Technical Support 800 765 9266...

Страница 51: ...great way to reduce noise in your sys tem and improve the SNR Polycom s patent pending noise cancellation algo rithm included in the EF2280 removes up to 15 dB of ambient background noise and improve...

Страница 52: ...0 Reference Manual 50 Technical Support 800 765 9266 To help you measure room gain the EF2280 includes a room gain detector You should check your room gain after you have set up the EF2280 Figure 29 R...

Страница 53: ...dBu 1 THD N Nominal level 0 dBu 0 775V rms Equivalent input noise 124 dBu 20 20 000 Hz Input Impedance 10 kOhms Input EMI Filter Pi filter on all audio inputs Outputs Output Gain 100 to 20 dBu in 1 d...

Страница 54: ...quency energy and if not installed and used in accordance with the instruction manual may cause harmful interfer ence to radio communications Operation of this equipment in a residential area is likel...

Страница 55: ...this product may cause radio interference in which case the user may be required to take adequate measures Installation Instructions Installation must be performed in accordance with all relevant nat...

Страница 56: ...Peak one cycle surge current 50Hz 25A Holding current 150mA min 750mA max Capacitance 30 5pF Off state current 5 A 2 EARTHING Earthing is of the utmost importance if the protector is to work effective...

Страница 57: ...TECHNICAL SPECIFICATIONS Polycom Inc 55 VORTEX EF2280 Reference Manual P O Box Sinoville South Africa Tel 27 82 4520269 Fax 27 1 27210751...

Страница 58: ...TECHNICAL SPECIFICATIONS VORTEX EF2280 Reference Manual 56 Technical Support 800 765 9266...

Страница 59: ...PEQ Line Output 5 Delay PEQ Line Output 4 Delay PEQ Line Output 3 Delay PEQ Line Output 2 Delay PEQ Line Mic Line 1 Mic Line Phantom A D Level adjust EN Input D Line A D Level adjust Input C Line A D...

Страница 60: ...ther EF Bus In or Out to Out will not work Cat 5 Plug Pinout 1 White Orange 2 Orange 3 White Green 4 Blue 5 White Blue 6 Green 7 White Brown 8 Brown RS 232 Port 9600 19200 38400 8 N 1 The RS 232 port...

Страница 61: ...n 1 LEDs can be used without series resistors we have provided series resistors in the circuitry For best results LEDs with Vf 2 0 V and If 20 mA should be used Larger values may be used but may resul...

Страница 62: ...RJ45 connector Connect pin 3 to pin 6 with an 110 Ohm resistor A terminator is not required for the EF2280 s with stacked audio connections as the terminator is built in Figure 31 Cable construction f...

Страница 63: ...ck should not exceed 40 degrees Celsius Allow 2 inches 51mm of open space in front of the EF2280 2 inches 51mm on either side and 4 inches 102 mm behind the unit for proper ventilation Equipment shoul...

Страница 64: ...CONNECTOR PINOUTS VORTEX EF2280 Reference Manual 62 Technical Support 800 765 9266...

Страница 65: ...ng or reproducing any program or data stored in or used with Vortex products Some states do not allow limitations on how long an implied warranty lasts or the exclusion of incidental or consequential...

Страница 66: ...of the same or similar design The repair or replacement is war ranted for 90 days The limited warranties and remedies set forth above are exclusive and in lieu of all other warranties whether oral or...

Страница 67: ...the microphone Convergence Rate Convergence rate refers to the amount of echo a line or acoustic echo cancel ler can cancel per unit time typically expressed in dB sec Better echo cancel lers have a...

Страница 68: ...tion Noise cancellation is a digital signal process that removes noise from an audio signal corrupted by real world interferences such as HVAC office noise crowd noise or road noise Generally there ar...

Страница 69: ...rical level of the reflected signal picked up by the microphone is the same as the level of the electrical signal sent from the AEC to the line output to your amplifier the room gain of this microphon...

Страница 70: ...DEFINITION OF TERMS VORTEX EF2280 Reference Manual 68 Technical Support 800 765 9266...

Страница 71: ...5 41 Automixer Gating Mode 25 35 Automixer Global Max NOM 25 35 Automixer Hold Time 15 24 34 41 Automixer Last Mic On 15 25 34 Automixer Local Max NOM 25 35 Automixer Manual Threshold 15 25 35 41 Auto...

Страница 72: ...37 Mic Line Inputs Line Inputs Line Outputs 59 Mix Minus 38 65 Multiple Vortex Devices 5 14 16 31 36 37 38 39 66 N Noise Cancellation 3 4 22 23 49 52 66 NOM 23 37 66 NOM Attenuation 66 NOM Bus 39 66...

Страница 73: ...DEX Polycom Inc 71 VORTEX EF2241 Reference Manual S Signal Generator 4 Submatrix 26 37 38 T Technical Support 47 Terminal Block Connectors 59 Terminating the EF Bus Terminators 14 60 V Video Codec 32...

Страница 74: ...INDEX VORTEX EF2241 Reference Manual 72 Technical Support 800 765 9266...

Страница 75: ......

Страница 76: ...0 Polycom 765 9266 www polycom com Technical Support 800 765 9266 Polycom Vortex and the Polycom logo are registered trademarks of Polycom Inc in the United States and various countries Copyright 2002...

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