Lectronics VR Field Reference Manual Download Page 29

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Modular Digital Hybrid Wireless™ Receiver

Rio Rancho, NM

Symptom

Solution

Bad.frequency.response.or.generally.poor.audio.quality
. .

Ensure the Receiver Module is set to the Compatibility Mode

matching the associated transmitter.

Check for Intermodulation problems. (See Frequency Coordination.)

Note: A number of symptoms may be caused by a strong interfering signal on the same frequency. Use the VR Field

System’s Scan function to verify the transmitter and receiver are operating on a clear frequency channel.

Computer.Interface.Problems

“New.Hardware.Found”.message.does.not.appear.when.USB.cable.plugged.into.VR.Field.System
. .

Defective USB cable between Computer System and VR Field, or

between Computer System and USB Hub (Multiple System

Configuration).

Defective USB Hub (Multiple System Configuration)

VRpanel software installed, but USB Driver not installed. (See

Installing LecNet2

™

Software and USB Driver.)

VRpanel.detected.by.Windows.but.cannot.be.detected.by.VRpanel.program
. .

VRpanel software installed, but USB Driver not installed. (See

Installing LecNet2

™

Software and USB Driver.)

Not.all.VR.Field.Systems.appear.in.response.to.the.“Add.VR(s).via.USB...”.command
. .

Defective USB cable between USB Hub and affected VR Field System.

Defective USB Hub.

Summary of Contents for VR Field

Page 1: ...Digital Hybrid Wireless Portable Modular Receiver System Digital Hybrid Wireless U S Patent 7 225 135 REFERENCE MANUAL Rio Rancho NM USA www lectrosonics com Fill in for your records Serial Number Purchase Date ...

Page 2: ...VR Field Receiver LECTROSONICS INC ...

Page 3: ...fiers and SAW Filters 7 Digital Pulse Counting Detector 7 Power Supply 8 VRS Functional Block Diagram 8 VRT Functional Block Diagram 8 VR Field System Controls and Functions 9 Front Panel Controls and Functions 9 POWER Button 9 Function Button 9 LCD Screen 9 PUSH FOR MENU SELECT Rotary Control 9 LEVEL Control 9 PHONES Jack 9 Receiver Select Buttons 9 BACK Button 9 Rear Panel Features 10 Power Inpu...

Page 4: ...rogrammable Frequency Group Entries 17 DivMode Setup Screen 18 SmartDiversity 18 OptiBlend 18 Frequency Diversity 19 LockSet Setup Screen 19 Scan Function 20 Scan Mode 20 Stop Mode 21 Zoom Mode 21 CmdView Screen 21 Frequency Coordination 22 Frequency Compatibility Chart 22 Frequency Compatibility Diagram 23 Using the Scan Function 24 Call Lectrosonics 24 Antenna Use and Placement 25 Phantom Power ...

Page 5: ...al processor DSP A D and D A converters and audio output circuits plus mechani cal rack mounting for up to six receiver modules The system can be setup and operated either through front panel controls and display or via rear panel USB or RS232 ports connected to a Windows 2000 XP or Vista based computer system and VRpanel which is part of the LecNet2 software package See VR Field Installation Guid...

Page 6: ...mp Note While all audio channels are sent to the respective Audio Output XLR jacks only one audio channel at a time may be monitored via the front panel PHONES jack See Headphone Mixer and Amp Compatibility Modes The VR Field System was designed to be compatible with Lectrosonics Digital Hybrid 400 Series transmit ters and will yield the best performance when operating in Digital Hybrid mode Howev...

Page 7: ...g front end PLL and VCO Circuits Each receiver module is frequency agile and can be set to operate on any one of 256 frequencies within its tun ing range The PLL synthesizer receives instructions from the microprocessor then uses those instructions to set the receiver module s operating frequency by controlling the 1st and 2nd Voltage Controlled Oscilla tors VCO Switched Diversity Reception All in...

Page 8: ... receiver has a built in Poly Fuse to protect the unit If a problem occurs that trips this fuse it will reset after the power supply is disconnected for about 15 seconds Note To use external power temporarily disconnect the power supply cable that connects the battery to the master unit VRS Functional Block Diagram VRT Functional Block Diagram For Internal Power the VR FIeld uses a single NP1 type...

Page 9: ...or navigating and selecting Setup Menus or Setup Screens and for setting parameters within the Setup Screens VR Field System Controls and Functions LEVEL Control The LEVEL control is used to adjust the output level of the front panel PHONES jack PHONES Jack The stereo PHONES jack is provided for monitoring the audio output of selected receivers Only the audio from a single receiver or diversity pa...

Page 10: ...RS 232 communication links Antenna Input Jacks Two BNC input connectors are provided for right angle whip antennas cables from remote antennas or cables from another VRM An internal mulitcoupler ensures the RF is applied equally to all installed Receiver Mod ules and also to the Antenna Output Jacks Antenna Output Jacks Two pairs of 50 Ohm BNC output jacks provide zero gain antenna loop throughs f...

Page 11: ...w Screen which displays the operating sta tus of the installed receiver modules Overview Screen The Overview Screen which appears after the Powerup Sequence is completed is the normal display during operation This screen is sectioned into six equal col umns one for each receiver module location Any given column displays information about the corresponding receiver module This information includes ...

Page 12: ...me The operating frequency of a receiver module can also be set through the Scan Function See Scan Function for more information Tuning Group Select Shortcut To instantly select or change a Tuning Group from the Receiver Detail Screen hold the FUNCTION button then press a Receiver Select button according to the chart below Receiver Info Screen From the Receiver Detail Screen pressing the front pan...

Page 13: ...up Screen displays the selected receiver audio output level setting and reference tone status Top Menu The Top Menu is accessed from the Overview Screen by pushing the MENU SELECT rotary control Rotating this control navigates through the various menu items The four menu items are SetUpRx LockSet Scan CmdView Rotate the MENU SELECT control to highlight a menu item then push the control to access t...

Page 14: ... the transmitters see 9V TIM and AA TIM Correctly set this feature will ensure that adequate warning will be provided in advance of battery failure Depending on the TxBatt mode a battery icon or timer will be displayed on both the Overview and Receiver Detail screens and the battery level or timer value will be displayed on the Receiver Infomation Screen The icon timer or voltage only appears afte...

Page 15: ...played in both the Overview and Receiver Detail screens and the TxBatt Setup Screen for the selected receiver mod ule Its format is H MM and it can run for up to 10 hours 9 59 before rolling over The timer s colon blinks in both the Main Receiver screen and the Receiver Detail Screen when the timer is active and receiving RF from the associated transmit ter When the transmitter or VR is turned off...

Page 16: ...e case that a receiver does not appear to be working properly or to determine the nature of RF interference However it should be used with caution The selected receiver can output very loud noises in this mode To enable pilot tone bypass mode for a Receiver Module navigate to the Pi lotBP Setup Screen and press the appro priate Receiver Select button Rotate the MENU SELECT con trol to select BYPAS...

Page 17: ... mable frequency group the tuning behavior is modified slightly Turning the MENU SELECT control navigates among the frequencies that are in the currently selected tuning group Turning the MENU SELECT control while holding down the Function button allows any frequency to be selected whether or not it is in the currently selected turning group Any time the currently tuned frequency is not in the cur...

Page 18: ...modules operate independently with each module having its own set of controls and indicators In ratio diversity and frequency diversity modes the paired receiver modules act as a set Pressing the Receiver Select button for one member of the pair has the effect of selecting or operating on both receiver modules in the pair Frequency diversity adds another facet in that it uses two transmitters requ...

Page 19: ...one bypass and output level are all matched For example setting the compatibility mode to Digital Hybrid in one receiver of the pair auto matically sets the other receiver to the same compatibil ity mode However transmitter battery monitoring and operating frequency are set independently Frequency Diversity has two modes of operation nor mal mode and test mode Test mode is automatically activated ...

Page 20: ...g function from the Over view Screen push the MENU SELECT control to enter the Top Menu then rotate the control to highlight Scan Pressing the MENU SELECT control again begins the scanning function Scan Mode The LCD switches to the Scan screen and automatically starts progressively scanning all installed frequency blocks The unit will scan continually accumulating the highest peak seen on each cha...

Page 21: ...d thus a different cursor will change the value for the Transmitter Fre quency Select Switch setting Zoom Mode Pressing the Function button from Stop mode accesses Zoom mode which displays an expanded portion of the spectrum around a fixed vertical cursor In this view each vertical band represents one frequency 100 kHz As the MENU SELECT control is rotated a 6 6 MHz window moves across the frequen...

Page 22: ...t was designed to as sist in minimizing intermodulation problems for multiple channel wireless systems It does this by identifying potential intermodulation problems and listing compat ible frequencies and frequency groups This chart can be used with all Digital Hybrid Wireless 400 Series receivers The chart divides the frequency blocks used in the North American market into Set 1 and Set 2 then f...

Page 23: ...Modular Digital Hybrid Wireless Receiver Rio Rancho NM 23 Frequency Compatibility Diagram See guidelines on page 16 for explanation ...

Page 24: ...e variety of sources including TV station signals other wireless equipment in use nearby or from intermodulation within the VR Field system itself The RF spectrum analyzer built into the VR Field system uses a receiver in each frequency block to scan the tunable spectrum and find clear chan nels with little or no interference After scanning and finding the needed number of clear channels one final...

Page 25: ...d fills or leaves the room The VR Field System offers a several sophisticated diversity designs which can overcome most dropout problems In the event however that you do encounter a dropout problem first try moving the one of the re mote antennas at least three or four feet from its current location This may alleviate the dropout problem at that location If dropouts are still a problem try moving ...

Page 26: ...nas that provide a useful directional pattern over a broad frequency bandwidth Ideal for portable applications including temporary setups for field production ARG15 ARG100 Coaxial cables for remote antennas are available from Lectrosonics in a variety of lengths from 2 to 100 ft Cables include Velcro tie wraps VRS Standard receiver module VRT Tracking receiver module P1196 Receiver Module Retainer...

Page 27: ...lem changes channels If problem follows Receiver Module the module may be defective RF Problems All Modules No Antenna Icon in any Receiver Module on Overview Screen The antenna icon is only present in switched diversity and frequency diversity modes and never present in ratio diversity mode RF Level Weak Improper length antenna if using UHF Whip Antennas Excessive length of cable between VR Field...

Page 28: ...d the audio will be muted squelched In the other compatibility modes no pilot tone is used and the P is never displayed Audio is present whenever the receiver detects a sufficiently strong signal Activating the pilot bypass function in any mode causes a lowercase b to appear in the pilot indicator position on the main window and forcibly unsquelches the audio Poor signal to noise ratio Associated ...

Page 29: ...Interface Problems New Hardware Found message does not appear when USB cable plugged into VR Field System Defective USB cable between Computer System and VR Field or between Computer System and USB Hub Multiple System Configuration Defective USB Hub Multiple System Configuration VRpanel software installed but USB Driver not installed See Installing LecNet2 Software and USB Driver VRpanel detected ...

Page 30: ...r 50 MHz 3 dB VRS Standard Module 30 MHz 3 dB VRT Tracking Module 11 MHz 3 dB Sensitivity 20 dB Sinad 0 9 uV AM Rejection 60 dB 2 uV to 1 Volt Image Spurious Rejection 85 dB Diversity Methods Switched ratio and frequency FM Detector Digital pulse counting detector 300 kHz Audio Performance overall system Frequency Response 32 Hz to 20 kHz 1dB overall system using a UM400 transmitter in Digital Hyb...

Page 31: ...f warranty repairs Returning Units for Repair For timely service please follow the steps below A DO NOT return equipment to the factory for repair without first contacting us by email or by phone We need to know the nature of the problem the model number and the serial number of the equipment We also need a phone number where you can be reached 8 A M to 4 P M U S Mountain Standard Time B After rec...

Page 32: ...rosonics Inc will pay for the cost of returning your equipment to you This warranty applies only to items returned to Lectrosonics Inc or an authorized dealer shipping costs prepaid within one year from the date of purchase This Limited Warranty is governed by the laws of the State of New Mexico It states the entire liablility of Lectrosonics Inc and the entire remedy of the purchaser for any brea...

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