Wohler AMP1-VS User Manual Download Page 7 | Manualshive

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© 2004 Wohler Technologies Inc. ALL rights reserved

7

AMP1-VS and AMP1-VSA

User Manual P/N

821613

, Rev-

B

Operation

Front Panel Features

Rear Panel Features

Audio Amplifier and Speaker Configuration

Balance Control Characteristics

Section 2

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Summary of Contents for AMP1-VS

Page 1: ...h Settings Level Meter Internal 10 Position DIP Switch Settings Level Meter DIP Switch Locations Level Meter Alternative Scales AMP1 VS Interconnect Block Diagram AMP1 VSA Interconnect Block Diagram AMP1 VS and AMP1 VSA 1U Digital Audio Speaker Monitors with One SDI Input and One SDI Output on BNC Four Analog Outputs From SDI Input on Phoenix Four Analog Inputs on Phoenix VSA Only Two Analog Outpu...

Page 2: ...eing walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer 12 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip ...

Page 3: ...es Inc ALL rights reserved 3 AMP1 VS and AMP1 VSA User Manual P N 821613 Rev B Sect 1 General Features and Specifications Features Specs and Installation Description Features Applications Specifications Installation Section 1 ...

Page 4: ...n between analog or digital SDI input sources All AMP1 Series units contain three audiophile quality drivers and three power amplifiers two amplifiers and two speakers that reproduce midrange and high frequency information in stereo and a third amp driver combination and two speakers that handles summed Low Frequency LF information below the 500 Hz crossover point The AMP1 Series unique audio desi...

Page 5: ...l Display Mode Select Peak Hold Select PPM Ballistics Select Calibration Scale Select 26 segment tri color LED bargraph 4 each vertical Tricolor red amber green 62 dB 0 4 6 or 8 dBv selectable VU Only VU PPM or PPM Only Manual 3 sec 10 sec or OFF Type I Type II DIN 4506 or SSRT Auto VU Extended VU BBC NORDIC DIN or Custom General Specifications AnalogInputConnectors SDIInputConnectors AnalogInput ...

Page 6: ...o stop vibrations external to the unit Mechanical Bracing Even though the unit is fairly heavy the chassis is securely attached to the front panel at eight points along its surface not just at the four corners of the chassis ears This feature will reduce or eliminate rear bracing requirements in many mobile portable applications The weight of internal components is distributed fairly evenly around...

Page 7: ...nologies Inc ALL rights reserved 7 AMP1 VS and AMP1 VSA User Manual P N 821613 Rev B Operation Front Panel Features Rear Panel Features Audio Amplifier and Speaker Configuration Balance Control Characteristics Section 2 ...

Page 8: ...ion set When multiple channels are selected pressing and holding an already selected channel button will allow further modification to the selection set Releasing all buttons accepts the new selection set Pressing and immediately releasing an already selected channel button will select only it and deselect all other channel selections Note that if channels assigned to either the left or right leve...

Page 9: ... 2004 Wohler Technologies Inc ALL rights reserved 9 AMP1 VS and AMP1 VSA User Manual P N 821613 Rev B Section2 Operation Figure 2a Front Panel Features AMP1 VS AMP1 VSA ...

Page 10: ...one is sufficient for proper phase monitoring While it is normal for stereo signals to contain some intermittant instantaneous out of phase and in phase conditions FAST LEDs a steady RED glow of the AVG LED indicates an out of phase alarm condition Bargraph Brightness Trim Pot This control is recessed into the front panel and can be accessed using a small screwdriver Turning it clockwise will incr...

Page 11: ... 2004 Wohler Technologies Inc ALL rights reserved 11 AMP1 VS and AMP1 VSA User Manual P N 821613 Rev B Section2 Operation Figure 2a Front Panel Features AMP1 VS AMP1 VSA ...

Page 12: ...I formatted signals and is configured for an unbalanced 75 Ω connection The unit de embeds and monitors sub group 1 channels 1 2 and sub group 2 channels 3 4 of SDI Group ID 1 see page 17 for more information Note that in the AMP1 VSA model the SDI input is monitored only when the Analog Digital Source Select Switch Item 5 page 8 is set to DIGITAL The female BNC SDI OUT loop through connector outp...

Page 13: ... 2004 Wohler Technologies Inc ALL rights reserved 13 AMP1 VS and AMP1 VSA User Manual P N 821613 Rev B Section2 Operation Figure 2b Rear Panel Features AMP1 VS AMP1 VSA ...

Page 14: ...cs The balance control attenuates the signal from the source so that the left and right bass frequencies summed together and reproduced in the woofer channel will also respond to the balance control Example If an audio signal of a voice speaking English is fed to the left A input and a voice speaking Spanish is fed to the right B input then the left speaker channel will reproduce the midrange and ...

Page 15: ...vations SDI to Analog Converter Module PCB 919068 SDI D A Gain Calibration Fine Adjustment 919068 Level Meter Rear Panel 6 Position DIP Switch Settings Level Meter Internal 10 Position DIP Switch Settings Level Meter DIP Switch Locations Level Meter Alternative Scales AMP1 VS Interconnect Block Diagram AMP1 VSA Interconnect Block Diagram Section 3 ...

Page 16: ...ut stage and before the volume control section The signal pick off for the headphones is after the volume and balance controls Speaker muting is controlled by circuitry that senses connection of headphones to the jack The power amps are attached to an aluminum heatsink plate which is also connected to the circuit common for these devices The heatsink plate forms an operational module separate from...

Page 17: ...D 1 are demuxed for conversion to analog Access to SDI Group I D 2 3 or 4 is optional and may be specified at the time of order SDI to Analog Converter Module PCB 919068 PCB 919068 Specifications Inputcharacteristics Receivertype Sensitivityperformance SDIinputlevel Inputformats Audiosamplingrate SDIoutputtype SDIoutput SDIoutputlevel Max outputofanalogout Analogout ofdigitalsource S N THD fullout...

Page 18: ...o make measurement of the FULL balanced output NOT just between one of the outputs and ground 5 Locate trim pots P5 P6 P7 and P8 see Figure 3a below Adjust P8 channel 1 through P5 channel 4 for the desired analog level corresponding to the digital signal amplitude being supplied to the unit For example if your house Analog Digital correspondence is for a 18 dBfs digital level to correspond to an a...

Page 19: ...e LED bargraphs Factory setting is 4 dB See DIP switch diagram below for settings Bargraph Display Mode DIP switch sections 4 and 5 determine how peak levels are displayed for the associated meters on the front panel There are four possible settings VU Only VU PPM Floating Segment PPM Only and PPM PPM Floating Segment The VU Only selection has a VU floating segment when a Peak Hold value is select...

Page 20: ...on Rise Time is 10 ms 2 dB Return Fall Time is 2 8 seconds 24 dB Integration Rise Time is 5 ms 2 dB Return Fall Time is 1 5 seconds 20 dB Integration Rise Time is a single sample Return Fall Time is 1 5 seconds 20 dB IEC268 10 Type 1 IEC268 10 Type 2 DIN 4506 SingleSample Section3 TechnicalInformation This 10 position DIP switch is accessed by removing the top cover of the AMP unit and is located ...

Page 21: ...1 AMP1 VS and AMP1 VSA User Manual P N 821613 Rev B Internal Level Meter 10 Position DIP Switch Module see page 20 Rear Panel Level Meter 6 Position DIP Switch Module see page 19 Level Meter DIP Switch Locations 919174 PCB Section3 TechnicalInformation ...

Page 22: ...cteristics are selected for the level meters using the Level Meter Internal 10 Position DIP Switch page 20 it is recommended that a label with the appropriate scale be applied to the front panel LED bargraph level meters See the diagram below for scale comparison Scale selection includes the Extended VU standard VU BBC NORDIC DIN and Custom not shown scales Contact Wohler Technologies for informat...

Page 23: ... 2004 Wohler Technologies Inc ALL rights reserved 23 AMP1 VS and AMP1 VSA User Manual P N 821613 Rev B AMP1 VS Interconnect Block Diagram Section3 TechnicalInformation ...

Page 24: ... 2004 Wohler Technologies Inc ALL rights reserved 24 AMP1 VS and AMP1 VSA User Manual P N 821613 Rev B AMP1 VSA Interconnect Block Diagram ...

Page 25: ...available upon request Wohler Technologies Inc 31055 HuntwoodAvenue Hayward CA 94544 Phone 510 589 5676 Fax 510 870 0811 US Toll Free 1 888 596 4537 web www wohler com e mail support wohler com Notes Wohler Technologies Inc 31055 Huntwood Avenue Hayward CA 94544 Phone 510 870 0810 Fax 510 870 0811 US Toll Free 1 888 596 4537 www wohler com support wohler com ...

Page 26: ...logies Inc 31055 HuntwoodAvenue Hayward CA 94544 Phone 510 589 5676 Fax 510 870 0811 US Toll Free 1 888 596 4537 web www wohler com e mail support wohler com Wohler Technologies Inc 31055 Huntwood Avenue Hayward CA 94544 Phone 510 870 0810 Fax 510 870 0811 US Toll Free 1 888 596 4537 www wohler com support wohler com ...

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