Vega Network Cables Rack-Mount Transmitter User's Manual
Contents
1. f you do not understand these restrictions or are uncertain of their applicability consult your dealer or the Vega factory Troubleshooting Most Vega eguipment provides years of trouble free operation However as with all electronic devices problems might occur Problems are usually due to low batteries improper antenna placement etc not equipment failure Vega equipment is thoroughly tested before leaving the factory The following paragraphs describe the most common problems Please review this information and take any necessary corrective action If you still experience difficulties contact the Vega factory or your sales representative Often the problem can be resolved by phone avoiding downtime for unnecessary returns Should repairs be necessary within the first year of operation under warranty Vega will promptly correct the problem and return the unit Service for older units may also be obtained from Vega contact the factory or your sales representative for information Return of both transmitter and receiver is recommended allowing us to perform a complete checkout and test of the entire system This can be especially helpful for elusive or intermittent problems Transmitter Antennas Proper mounting and placement of antenna s is vitally important in wireless systems If overlooked antennas might cause unnecessary problems In all cases a clear and unobstructed line of sight path between the transmitting anten2. cm 210 MHz 15 0 38 1 cm For frequencies between the chart entries the length may be interpolated XLR Connector Connect the system s audio source to the XLR connector located on the rear panel This is a balanced transformer isolated input which is dc isolated to 50 volts For the standard mic or line level input modes the pin assignments on this connector are pin 1 shield pin 2 audio positive pin 3 audio negative When internally programmed for use with a Clear Com or RTS intercom the pin assignments will be consistent with that required by the intercom system The programming jumpers are located inside the unit at the rear of the PCB near the XLR connector Programming is as follows Mode JP1 JP2 Balanced mic line BAL BAL Clear Com XLR 3 XLR 1 RTS Channel XLR 2 XLR 1 RTS Channel XLR 3 XLR 1 70 Volt Live 70 V 70V When reprogrammed plug the wall type power supply into a standard power outlet and insert the dc power connector into the power jack located on the rear panel of the RMT 10 Power Supply WARNING If providing dc power from another source external fusing is strongly advised No internal circuit fuse is provided with the RMT 10 The provided power supply is internally impedance and thermal limited and therefore does not require additional circuit protection Consult the Vega factory for more information You may wish to supply dc power from a source other tha
3. intelligibility the transmission signal may be adjusted via frequency compensation and audio compression controls Two frequency compensation controls for boosting or cutting the low and high frequencies are provided on the rear panel The audio compression control limits dynamic range by either a 2 1 logarithmic compressor or a wide range automatic level control ALC system See the Adjustments section for details Noise reduction is achieved with a proprietary two ended compander system that is always active The compander is compatible with Vega s PL 2 portable VHF receiver A 1 4 wave whip antenna is provided with the RMT 10 Other antennas such as the Vega Model 123U dipole antenna may be used to facilitate rack mount installation or to improve coverage where the standard whip antenna would otherwise be blocked or shielded by equipment cabinets or large objects Transmitter Installation The RMT 10 can be mounted in a standard 19 inch 48 cm rack or operate standing alone For stand alone operation Peel off the four rubber feet s protective paper provided with the RMT 10 and attach to the bottom of the chassis at each corner For rack mount use the detachable rack mount ears must first be installed on the RMT 10 as follows 1 Loosen the four screws do not remove on the two sides of the unit that hold the top cover onto the chassis 2 Slide the cover back as far as it will go about
4. panel MIC LINE switch to MIC then readjust the front panel AUDIO LEVEL control until the AUDIO LEVEL bargraph meter indicates peaks in the 0 to 2 VU range Attach an earpiece or headset to the receiver turn on select the correct frequency then verify correct reception See the receiver s manual for details 4 Vega RMT 10 Introduction This document describes setup adjustment and operation only detailed maintenance information is not included If you have any guestions consult your dealer or the Vega factory Your Vega Model RMT 10 is a single channel VHF FM transmitter It transmits a mono audio signal to compatible receivers typically Vega PL 2s The RMT 10 s transmitter module PCB can be swapped by authorized personnel to allow operation on a different frequency any one of over 1 600 different frequencies between 169 MHz and 216 MHz Consult your dealer or the Vega factory for details The RMT 10 accepts either line or mic audio via a standard XLR connector The input level switch allows selection between mic 40 to 10 dBu or line 10 and 20 dBu audio input RMT 10s may also be internally programmed to work with Clear Com or RTS wired intercom systems receive only mode The RMT 10 may also be configured to pass a 70 volt speaker line input up to 250 volts push to talk Fine audio level adjustments may be made using the 30 dB variable attenuator conveniently located on the front panel To improve
5. power on off switch power on LED audio input level adjust VU meter 8 segment LED Rear Panel audio input connector 3 pin XLR female audio processing switch 3 position hard ALC linear soft ALC audio input level 2 position mic or line frequency compensation two screwdriver adjustable controls high and low dc power input RF output SO 239 12 20 V 5 0 0 0 0dc 300 mA maximum negative ground Wall mount 12 Vdc 500 mA unregulated 120 Vac standard 240 Vac optional 19 in 48 cm rack mount 17 in 43 cm W x 1 72 in 4 4 cm Hx 5 1 in 13 cm D excluding detachable rack mount ears 3 2 Ib 1 5 kg without power supply ME GIA I www vegawireless com 9900 East Baldwin Place EI Monte California 91731 2294 Telephone 626 442 0782 Toll Free 800 877 1771 Fax 626 444 1342 e CompuServe 73513 1417 Vega April 2000
6. storage or reshipping If for any reason you do not find the eguipment to be completely satisfactory please immediately contact your Vega dealer or the Vega factory Should service ever be reguired remember your authorized Vega service dealer knows your eguipment best They have the training and test eguipment necessary to restore your equipment to its peak performance Please feel free to contact either your authorized Vega dealer or the Vega factory for information or assistance at any time Transmitter 1a 13 14 1b 10 1b Put on rack mount 1a ears or 1b rubber feet for details see Installation next page Attach the whip antenna see the Whip Antenna Length section or the optional dipole antenna to the ANTENNA connector on the rear panel Connect wall type power supply to the rear panel DC INPUT and then plug the power supply into an ac outlet Connect audio source to the rear panel XLR connector see XLR Connector next page Set the rear panel INPUT LEVEL MIC LINE switch to the LINE position 10 11 12 Set the rear panel AUDIO COMPRESSION switch to LINEAR Turn on the RMT 10 with the front panel POWER switch With an audio input applied to the unit adjust the front panel INPUT LEVEL ADJUST control until the AUDIO LEVEL bargraph meter indicates peaks in the 0 to 2 VU range If the peaks do not reach at least 0 VU with the previous adjustment set the rear
7. 1 8 inch 3 mm 3 Slide the smaller end of the front mount ear into the grooves in each end of the front panel Be sure the ear s vertical locking groove is facing the unit s rear 4 Slide the top cover forward so the front edges engage the locking grooves in the rack mount ears Re tighten the cover onto the chassis four screws Verify the rack mount ears are secure and will not slip out The RMT 10 is now ready to be installed into a standard 19 inch 43 cm rack using the 10 screws and finish washers provided or the equivalent metric hardware a S Vega RMT 10 Whip Antenna Length For optimum antenna efficiency the wire whip may be cut to length Do NOT try to cut the whip with wire cutters the whip is made from tough steel and will likely destroy the wire cutters Use a bench grinder or equivalent to grind through the whip wire being careful to use protective goggles and heavy gloves while grinding operation The chart below lists the length required for various operating frequencies The lengths shown are for the exposed portion of the whip The actual cut length will be 0 175 0 45 cm longer In addition the values differ from the theoretical quarter wave length due to the loading effects of the ball on the end of the whip and the connector barrel Approximate length of whip versus frequency 170 MHz 17 8 45 2 cm 180 MHz 17 1 43 4 cm 190 MHz16 3 41 4 cm 200 MHz15 6 39 6
8. 6 442 0782 Fax 626 444 1342 Faxback 626 444 2017 Claims No liability will be accepted for damages directly or indirectly arising from the use of our materials or from any other causes Our liability shall be expressly limited to replacement or repair of defective materials Transmitter 11 Specifications Product Description Freguency Control Freguency Stability Operating Freguency Range RF Power Output Modulation Maximum Deviation Deviation Limiter Range Balanced Audio Input Mic Line Mode Audio Input Level Select Audio Input Level Audio Input Adjust Range Audio Freguency Compensation Adjustments Audio Freguency Response Noise Reduction System User Selectable Audio Processing User Accessible Controls and Indicators Power Reguired Power Supply Provided Packaging Weight VHF audio transmitter Single freguency crystal controlled 0 005 169 216 MHz 50 mW maximum Direct FM 45KOF3E 7 5 kHz Frequency compensated active rectifier voltage controlled amplifier 3 pin female XLR 1 ground 2 audio 3 audio Rear panel mounted slide switch LINE 10 to 20 dBu MIC 40 to 10 dBu 70 volt 3 to 80 volts RMS 30 dB nominal Low 10 dB high 10 dB 120 Hz to 10 kHz 2 dB frequency controls electrically centered Two ended 2 1 logarithmic companding Hard ALC 35 dB range or soft ALC 2 1 compensated logarithmic compressor Front Panel
9. I VEGA RMT 10 VHF Rack Mount Transmitter Instruction Manual VEGA II 099 0068D 2 Vega RMT 10 TABLE OF CONTENTS Quick Start vos a Wik warned ae 2 A Word to Vega Users L ll ll k kkk 2 UNPACKING sa ae na skein GA sas At hi hae SEG 2 Introduction knn 4 Installation sissi 08 uam Han 5 Whip Antenna Length lkk 6 XLR Connector 6 50060 ana 4 ei dw Rh oO a ana 6 Power Supply s aasta s 8 Bee ewe ee A 6 Adj stments s oni eare ea are he 7 Audio Compression Adjustment 7 Audio Level Setting 222200 7 Frequency Compensation Adjustments 8 Compatibility 6 225 4205082 ee naar 8 Frequency Selection 22222000 8 Troubleshooting k une 8 Antennas knn 8 RF NoiSe naas u a ee iy a a ue 9 Warranty Limited 10 Factory Service Center J ll 2220000 10 Claim ns an Zu ae ee 10 Specifications 2 0 00 338 ns amade 11 Quick Start Please see Figure 1 and the instructions on the next page for a quick start A Word to Vega Users In selecting Vega equipment you are in the company of audio professionals worldwide Leadership for over 30 years has made Vega synonymous with wireless equipment Our equipment provides superb sound quality outstanding performance and the durability needed for years of successful operation Unpacking Verify the number of boxes shown as shipped has been received in good condition Unpack and save cartons for
10. f original purchase If such a malfunction occurs the product will be repaired or replaced at our option without charge during the one year period if delivered to the Vega factory Warranty does not extend to damage due to improper repairs finish or appearance items malfunction due to abuse or operation under other than the specified conditions nor to incidental or conseguential damages Some states do not allow the exclusion or limitation of incidental or conseguential damages so the above limitation might not apply to you This warranty gives the customer specific legal rights and there may be other rights which vary from state to state Vega authorized service centers enable Vega to give customers immediate service on repairs These service centers are fully gualified and eguipped to handle the servicing of Vega eguipment and turnaround time is excellent To obtain the address of your nearest authorized warranty service center contact your dealer or the factory If you should reguire service pack the eguipment carefully and return it to the factory service center or the nearest authorized service center Important Be sure the exact return address and a description of the symptoms are enclosed inside the package with your eguipment It is also advisable to return the transmitter and receiver for full system performance test when practical Factory Service Center Vega 9900 E Baldwin Place EI Monte CA91731 2294 Telephone 62
11. n the provided wall mounted power supply In this case connect 12 to 20 Vdc 0 3 A minimum to the power connector on the rear of the RMT 10 A compatible mating connector is the Switchcraft 760 When connecting external dc carefully observe the following polarity rules Transmitter Power supply negative to the outer conductor Power supply positive to the inner conductor Adjustments Note Normal setup and operation does not require internal access Refer all service and internal adjustments to gualified service personnel Specifically the user may not make adjustments to the transmitter module See the Troubleshooting section for additional information Use the same adjustment procedures for use with Clearcom RTS and 70 volt line applications Audio Compression Adjustment The Audio Compression switch limits audio signal dynamic range as follows HARD ALC improves intelligibility by providing about 35 dB of automatic level control with fixed gain at low input levels SOFT ALC position provides soft 2 1 logarithmic gain compression demphasizing louder audio while emphasizing low level audio LINEAR does not alter the audio signal at all and provides no dynamic range adjustment Set the LOW and HIGH frequency compensation controls to the mid or 0 position The adjustment procedure for an intercom system or 70 volt line input is identical except the mic line switch is not needed and is
12. na and the receiver s is reguired The antenna might be concealed behind fabric thin plastic acoustic tile and thin plywood without significantly affecting performance However close proximity to metallic objects such as furniture lighting fixtures scaffolding electrical cables metal structural members aluminum window frames and eguipment cabinets must be avoided Whip and dipole antennas reguire at least a 5 inch 0 1 m minimum spacing from metal surfaces Other types of antennas may reguire greater spacing The manufacturer s recommendations should be followed when using yagis and other types of specialized antennas Problem Sources Amiens PISGEMIEN Fluorescent Lights K N m d N Md p A Scaffolding Electric Cables Metal Barriers 10 Vega RMT 10 RF Noise Problems with RF noise sources fluorescent lights car ignitions industrial eguipment etc are guite rare Defective fluorescent lighting fixtures however can generate significant amounts of RF energy Usually repairing the fixture will cure the problem This situation is true for most other interference sources as well That is unless the eguipment is electrically defective the interference will not adversely affect Vega wireless eguipment Warranty Limited All Vega wireless products are guaranteed against malfunction due to defects in materials and workmanship for one year beginning at the date o
13. nonfunctional Note Whenever a different dynamic range setting is selected it will be necessary to readjust the variable audio level control to achieve the 0 VU reading on the front panel bargraph If the VU meter consistently reads significantly lower than 0 VU the system will not be operating at the best possible signal to noise ratio Audio Level Setting The RMT 10 accommodates audio levels between 40 dB to 20 dB a 60 dB range If you know the approximate level of the input audio set the mic line as follows Program Audio Level Mic Line Switch Setting 10 to 20 dBu LINE 40 to 10 dBu MIC Next adjust the front panel INPUT LEVEL ADJUST control until the front panel VU meter bargraph just reaches the O VU position on voice peaks If you don t know the approximate level of the audio input set the MIC LINE switch to LINE Apply the desired program audio signal to the audio input connector Observe the front panel VU meter Adjust the front panel variable audio level control until the VU meter bargraph just reaches the O VU position If the VU meter bargraph consistently reads well below 0 VU set the MIC LINE switch to the MIC position and readjust the variable audio level control for 0 VU reading If the VU meter bargraph cannot be adjusted up to the 0 VU level with the MIC LINE switch in the MIC position increase the audio level at the source 8 Vega RMT 10 For
14. use with Clearcom or RTS intercoms or for 70 volt line applications use the same basic adjustment procedures as above Freguency Compensation Adjustments Listen to the program audio on a compatible receiver Vega PL 2 Experiment with the dynamic range limiter settings and select the position that best meets your audio guality and intelligibility needs The controls should be adjusted to achieve maximum intelligibility for the particular listener group involved For the hearing impaired a beginning setting of 5 to 6 for the high control 4 to 5 on the low control and HARD ALC is a good starting point These freguency compensation controls provide 10 dB adjustments to the low and high freguencies respectively Unlike stereo tone controls these adjustments affect audio response well into the audio midrange Compatibility The RMT 10 transmitter is intended to be used only with Model PL 2 portable receiver s or other Vega receivers that are specifically identified as being compatible with RMT 10 Freguency Selection For successful operation it is necessary to choose a transmit freguency for the RMT 10 that can coexist with other RF systems in the coverage area The freguency of the RMT 10 must be specified at the time of purchase The Vega factory provides a freguency coordination service free of charge for this purpose NOTE There are restrictions on use of specific freguency ranges by certain types of users
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