Mipro Electronics Co MI909T Wireless Digital Stereo Transmitter User Manual MI 909T 2CE497B x3 201410

Mipro Electronics Co Ltd Wireless Digital Stereo Transmitter MI 909T 2CE497B x3 201410

Users Manual

1. Read these instructions. 2. Keep these instructions.3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7. Do not block any ventilation openings. Install in accordance with the manufacturer's instructions. 8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9. Do not defeat the safety purpose of the polarised or ground plug: A polarised plug has two blades with one wider than the other. The wide blade is provided for your safety. When the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10. Protect the power cord from being walked on or pinched particularly at plug, convenience receptacles, and the point where they exit from the apparatus. 11. Only use attachments/accessories specified by the manufacturer. 12. Use only with a 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-over. 13. Unplug this apparatus during lightning storms or when unused for long periods of time. 14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supplycord or plug is damaged, liquid has been spilled or objects have fallen intothe apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. 15. To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. 16. Apparatus should not be exposed to dripping or splashing and no objects filled with liquids, should be placed on the apparatus.17. Use only with the battery which specified by manufacturer. 18. The power supply cord set is to be the main disconnected device.! IMPORTANT SAFETY INSTRUCTIONS ! WARNINGThis symbol indicates that dangerous voltage constituting a risk of electric shock is present within this unit.This symbol indicates that there are important operating and maintenanceinstructions in the literature accompanying this unit.1. FOR OUTDOOR USE:To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.2. UNDER WET LOCATION:Apparatus should not be exposed to dripping or splashing and no objects filled with liquids, such as vases should be placed on the apparatus.3. SERVICE INSTRUCTIONS:CAUTION - These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so.FCCTHIS DEVICE COMPLIES WITH PART 74 AND　PART 15 SUBPART B OF THE FCC RULES OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) This device may not cause interference. (2) This device must accept any interference, including interference that may cause undesired operation of the device. This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. ICThis device complies with Industry Canada licence-exempt RSS-123 ISSUE 2 / RSS-310 ISSUE 3 standards. Operation is subject to the following two conditions:(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes :(1) l'appareil ne doit pas produire de brouillage, et(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
1 Profile2 Front Panel Controls and IndicatorsRear Panel ConnectorsOperating InstructionsLCD Panel Operating Instructions27 2834625 MIPRO's Proprietary ACT Sync FunctionNetwork ConnectionRackmount Kit29 Cautions & RecommendationsProfileThank you for choosing a MIPRO IEM product. This industry's first digital IEM system is engineered to meet the stringent requirements demanded in professional touring and installation applications. Featuring digitally encrypted technology and unparalleled digital audio performance and transmission reliability, superior frequency response characteristics from 20Hz low-frequency sound clearly exceeds analog IEM systems currently on the market.Digital Stereo Rack Transmitter1ContentsDigital Stereo Rack Transmitter0Disposal2005-08-13Dispose of any unusable devices or batteries responsibly and in accordance with any applicable regulations.Disposing of used batteries with domestic waste is to be avoided!Batteries / NiCad cells often contain heavy metals such as cadmium(Cd), mercury(Hg) and lead(Pb) that makes them unsuitable for disposal with domestic waste. You may return spent batteries/ accumulators free of charge to recycling centres or anywhere else batteries/accumulators are sold.By doing so, you contribute to the conservation of our environment!To prevent possible hearing damage, do not listen at high volume levels for long periods.
φPower Button: Press to turns the unit on and off.Headphone Monitoring: Insert a 6.3 mm headphone here.Headphone Volume: Adjust for volume loudness.Left Audio Indicators: The red Peak LED indicates the inputs are overdriven. Right Audio Indicators: The red Peak LED indicates the inputs are overdriven.Front Panel Screen: Display settings and parameters.ACT Sync Button & Window: Press ACT button to sync frequency from transmitter to bodypack receivers.Control Knob: For setting changes. Rack Transmitter Front Panel Controls and Indicators2 3 4 5 812345678716520.500MHzAFLINE02 03GR CH L R EQL23Rack TransmitterRear Panel Connectors10 11 12 13 15914Antenna Connector (TNC): Attach supplied antenna. ACT Bus: Attach supplied ACT Bus cable for remote control option.LOOP OUT Left: Sends a copy of the audio signal going into the transmitter to another device.LOOP OUT Right: Sends a copy of the audio signal going into the transmitter to another device.Audio Inputs Left (Mono): Connect to balanced or unbalanced outputs. Accepts both 1/4-inch or male XLR connectors.Audio Inputs Right: Connect to balanced or unbalanced outputs. Accepts both 1/4-inch or male XLR connectors.12~15V DC Power: Connect the transmitter to a power outlet using the supplied power plug & cable.9101112131415The MI-909 system consists one MI-909T digital rack unit stereo transmitter and will transmit to one or more MI-909R digital stereo bodypack receivers.Digital Stereo Rack TransmitterDigital Stereo Rack Transmitter
Operating Instructions1. Rear Antenna InstallationAttach supplied antenna to the transmitter. Ensure the antenna and transmitter have the same frequency band for optimal transmitting efficiency3. External Antenna InstallationInstall optional MIPRO AT-100 & MS-90 antennas with microphone stands and high quality coaxial cable for improved performance. Ensure antennas are installed and positioned higher than the crowds and away from obstructions. 2. Front Antenna InstallationInstall an option FB-71 rear-to-front rackmount kit with cable. Attach supplied antenna to the front for improved optimal transmitting efficiency.Wall-mounted AT-100 + MS-90 Mic stand AT-100 + MS-90454.5.6.7. φPower Connect the transmitter to a power outlet using the supplied power plug & cable.Power Button Press to turns the unit on and off.Audio Inputs Stereo or Mono outputs. Left audio input for Mono. Accepts both 1/4-inch or male XLR connectors.Headphone MonitoringInsert a 6.3 mm headphone here.WARNING: To prevent possible hearing damage, do not listen at high volume levels for long periods.Digital Stereo Rack TransmitterDigital Stereo Rack Transmitter
LCD Panel Operating Instructions 520.500MHzAFLINE02 03GR CH L R EQLA1 A3A2A5 A6 A7 A8 A9A4GR: Group CH: Channel Working Frequency in MHZ AF: Audio FrequencyLeft Right ChannelA1A2A3A4A5EQ icon: Equalizer Lock Icon Encryption key Icon RF output Icon A6A7A8A91. Main LCD Screen provides access to menus and displays a summary of transmitter settings2A. Operating Instructions:a. Press & release Control Knob to access menus.b. Turn right or left to access specific menus. Press to confirm setting changes.. Control Knob: Menu Settings Control Knob520.500MHzAFLINE02 03GR CH L R EQL673. Listed Menus USER FREQUENCY AF SENSITIVITY SOUND MODE NAME SETTING SET LOCK SECURE KEY EXIT & SAVE > GROUP & CHANNEL > RF POWER > AF INPUT > EQUALIZER > NET ADDRESS > ENCRYPTION > FREE SCANDigital Stereo Rack TransmitterDigital Stereo Rack Transmitter
(1) GR CH: GROUP & CHANNEL Settings89A. a.b.c.d. Operating Instructions:Locate GROUP & CHANNEL menu, press to activate setting.Turn left or right for desired GROUP. Press to save.Turn or right for desired CHANNEL. Press to save.Once saved, indicator returns to listed menus.Control Knob Operating InstructionsPressTurn Left or Right USER FREQUENCY > GROUP & CHANNEL GROUP & CHANNEL GROUP & CHANNEL > 01 02 > 02 01 GROUP & CHANNEL > 02 03 USER FREQUENCY > GROUP & CHANNEL(2) USER FRQUENCY SettingsA.a.b.c.d.﹡﹡ Operating Instructions:Locate USER FREQUENCY menu, press to activate setting.Press to enter setting (highlighted in black). Press to save.Frequency selection: adjustable in increments of 1 MHz or 25 kHz.Once saved, indicator returns to listed menus.Factory pre-set Group and Channel have corresponding user frequencies. “ ” signs appear in GR & CH if user frequency are set-up manually. Once a new frequency is set-up, do not forget to align and sync with a bodypack receiver by performing sync protocol by pressing ACT sync button.Notes: > USER FREQUENCY GROUP & CHANNEL USER FREQUENCY USER FREQUENCY > 520.500MHz 521> .500MHz USER FREQUENCY 52 5> 521. MHz > USER FREQUENCY GROUP & CHANNELDigital Stereo Rack TransmitterDigital Stereo Rack Transmitter
(3) RF POWER: Radio Frequency (RF) POWER Settings10 11 > RF POWER USER FREQUENCY RF POWER RF POWER > HI G H P O W E R > HI G H P O W E R Highlighted RF POWER > LO W P O W E R > RF POWER USER FREQUENCY RF POWER > RF O F F A. a. .b.c.Operating Instructions:Locate RF POWER menu, press to activate settingPress to enter setting (highlighted in black). Turn for HIGH POWER, RF OFF or LOW POWER. Press to save.Once saved, indicator returns to listed menus.Notes:High power is country dependent. Power levels vary by region or country.RF OFF enables no RF power emitting without powering off the transmitter.icon: RF POWER setting is OFF.icon: RF POWER setting is LOW.icon: RF POWER setting is HIGH.520.500MHzAFLINE02 03GR CH L R EQ520.500MHz520.500MHzAFMICAFMIC02 0302 03GR CHGR CHL RL REQEQHLHLHighlightedHighlightedHIGH POWER iconHLOW POWER iconLRF OFF icon(4) AF SENSITIVITY: Audio (AF) SENSITIVITY Settings > AF SENSITIVITY RF POWERA.a.b.c.Operating Instructions:Locate AF SENSITIVITY menu, press to activate setting.Press to enter setting (highlighted in black). Turn for desired parameters. Press to save.Once saved, indicator returns to listed menus.Notes:Three bar indicators from the SOURCE are optimal. The red clip PEAK LED indicates the inputs are overdriven. Reduce the level at the audio source or change the AF sensitivity setting if 0 dB is still too high.If less than two bar indicators from the SOURCE with -30 dB setting, change AF INPUT to MIC LEVEL to improve AF input sensitivity level. AF SENSITIVITY AF SENSITIVITY > 0d B > 0 d B AF SENSITIVITY > -3 0 d B AF SENSITIVITY > -3 d B > AF SENSITIVITY RF POWER.....Highlighted HighlightedHighlightedDigital Stereo Rack TransmitterDigital Stereo Rack Transmitter
Highlighted12 13(5) AF INPUT: Audio (AF) INPUT Settings > AF INPUT AF SENSITIVITYA. a.b.c.Operating Instructions:Locate AF INPUT menu, press to activate setting.Press to enter setting (highlighted in black). Turn for LINE LEVEL or MIC LEVEL. Press to save.Once saved, indicator returns to listed menus.Notes:Select appropriate output device with proper audio input signal strength to avoid distortion when it is set too high and deteriorated S/N ratio when it is set too low.icon: MIC LEVEL.icon: LINE LEVEL. AF INPUT AF INPUT > LI N E LEVEL > LINE LEVEL AF INPUT > MIC LEVEL > AF INPUT AF SENSITIVITYAFMICAFLINE520.500MHzAFLINE02 03GR CH L R EQL520.500MHzAFMIC02 03GR CH L R EQLHighlightedMIC LEVEL iconAFMIC LINE LEVEL iconAFLINEHighlightedHighlighted(6) SOUND MODE: SOUND MODE Settings SOUND MODE > ST E R E O SOUND MODE > STEREO SOUND MODE > MONO > SOUND MODE AF INPUT > SOUND MODE AF INPUTA.a.b.c.Operating Instructions:Locate SOUND MODE, press to activate setting.Press to enter setting (highlighted in black). Turn for STEREO or MONO. Press to save.icon: STEREO.icon: MONO.Once saved, indicator returns to listed menus.Note:Plug AF IN (L) only for MONO sound.520.500MHzAFLINE02 03GR CH L X EQL520.500MHzAFMIC02 03GR CH L R EQLL RL XSTEREO iconL RMONO iconL XDigital Stereo Rack TransmitterDigital Stereo Rack Transmitter
(7) EQUALIZER: EQUALIZER Settings14 15......................... > EQUALIZER SOUND MODE EQUALIZER > FLAT ON EQUALIZER FLAT O N> EQUALIZER > LO W BAND=-9dB EQUALIZER > LOW BAND=-9dB EQUALIZER > LOW BAND=+9dB EQUALIZER EQUALIZER EQUALIZER > MI D BAND=0dB > MID BAND=-9dB > MID BAND=+9dB EQUALIZER EQUALIZER EQUALIZER > HI BAND=+9dB > HI BAND=-9dB > HI BAND=+9dB EQUALIZER > SE T E X I T EQUALIZER > FL AT OFF EQUALIZER > LOW BAND=-6dB EQUALIZER > MI D BAND=-6dB EQUALIZER > HI BAND=-6dB SOUND MODE > MI D BAND=+9dB > EQUALIZERA. Operating Instructionsa. Locate EQUALIZER, press to activate setting.b. Press to enter setting (highlighted in black). Turn for FLAT→LOW BAND→MID BAND→HI BAND→SET EXIT. Press to save.FLAT: FLAT ON or FLAT OFF.LOW BAND/ MID BAND/ HI BAND: -9dB to +9dB: adjustable in increments of 3 dB.SET EXIT: Press SET EXIT to return to main LCD screen.c. Once save, press SET EXIT to return to listed menus.Notes:icon: FLAT ON.icon: FLAT OFF.520.500MHzAFLINE02 03GR CH L RL520.500MHzAFMIC02 03GR CH L RLEQEQEQ EQFLAT ON iconEQFLAT OFF iconEQDigital Stereo Rack TransmitterDigital Stereo Rack Transmitter
(8) NAME SETTING: NAMM SETTING Settings NAME SETTING > NAME SETTING EQUALIZER NAME SETTING > DI S P L AY O N NAME SETTING > ED I T: 00MIPRO!00 NAME SETTING > S E T E X I T NAME SETTING DISPLAY ON> NAME SETTING > DISPLAY ON NAME SETTING DISPLAY OFF> EQUALIZER > M I D BAND=+9dB > NAME SETTING > KL NO 00 IPRO!00M M NAME SETTING 0 0> . / 12 0 MIPRO!00 NAME SETTING > ED I T: 00MIPRO!00+16 17.....A. Operating Instructionsa. Locate NAME SETTING menu, press to activate setting.b. Press to enter setting (highlighted in black). Turn for DISPLAY ON →EDIT: 00MIPRO!00 →SET EXIT. DISPLAY: Turn for DISPLAY ON or DISPLAY OFF.EDIT: Up to 10 alphanumeric characters and symbols. SET EXIT: Press SET EXIT to return to main LCD screen. c. Once save, press SET EXIT to return to listed menus.Note:DISPLAY ON – Alphanumeric characters are shown.DISPLAY “ON”Displays alphanumeric charactersDISPLAY “OFF”Display User Frequency00MIPRO!00AFMIC02 03GR CH L RLEQ520.500MHzAFMIC02 03GR CH L RLEQDigital Stereo Rack TransmitterDigital Stereo Rack Transmitter
18 19(9) NET ADDRESS Settings: For PC control networkA. Operating Instructions:a. Interface with ACT-BUS for pc-control network. Can monitor up to 64 channels. b. 01~64 transmitter addresses can be setup and monitor via an optional PC-control software remotely. All transmitters must be connected to a dedicated address for network identification.c. Locate NET ADDRESS menu, press to activate setting.d. Press to enter setting (highlighted in black). Press to save.e. Once saved, indicator returns to listed menus. > NET ADDRESS NAME SETTING NET ADDRESS > 01 NET ADDRESS > 01 > NET ADDRESS NAME SETTING NET ADDRESS > 64 ..... NET ADDRESS > 02 (10) SET LOCK Settings : For front panel lock > SET LOCK NET ADDRESS > SET LOCK NET ADDRESS SET LOCK > UN L O C K SET LOCK > UNLOCKA. Operating Instructions:a. Locate SET LOCK menu, press to activate setting.b. Press to enter setting (highlighted in black) for UNLOCK or LOCK. Press to save.icon: UNLOCK.icon: LOCKED.c. Once save, press to return to listed menus.d. Once icon appears the panel is locked. No new settings can be changed. Need to unlock the panel first prior to make new setting changes.520.500MHzAFLINE02 03GR CH L R EQLicon: LOCKED icon: UNLOCK520.500MHzAFLINE02 03GR CH L R EQL SET LOCK > LOCKDigital Stereo Rack TransmitterDigital Stereo Rack Transmitter
20 21(11) ENCRYPTION : To add encryption or decryption > ENCRYPTION > ENCRYPTION SET LOCK SET LOCK > OF F ENCRYPTION > OFF ENCRYPTIONA. Operating Instructions:a. Locate ENCRYPTION menu, press to activate setting.b. Press to enter setting (highlighted in black) for ON or OFF. Press to save.icon: Encryption key is ONNo icon: Encryption key is OFF (not activated)c. Once save, press to return to listed menus.** Be sure to press ACT button for synchronization from transmitter to bodypack receiver after each time an Encryption is activated.d. After a new encryption key is added to the transmitter, the transmitter frequency is no longer valid and compatible with existing bodypack receivers. To be compatible, perform the ACT sync function.  ENCRYPTION > ON520.500MHzAFLINE02 03GR CH L R EQL520.500MHzAFLINE02 03GR CH L R EQLicon: ENCRYPTION ON No icon: ENCRYPTION OFF(12) SECURE KEY Settings: Adding encryption key option > SECURE KEY > SECURE KEY ENCRYPTION ENCRYPTIONA. Operating Instructions:a. Locate SECURE KEY menu, press to activate setting.b. Press to enter setting (highlighted in black) for STATIC or SCROLL. Press to save.STATIC icon: No new encryption key is generated each time the ACT sync button is pressed.SCROLL icon: A new encryption key is generated each time the ACT sync button is pressed. c. Once save, press to return to listed menus.d. 128bit encryption key is generated randomly and very difficult to break or crack for eavesdropping occurrences.Notes:STATIC encryption method is ideal for one transmitter to multiple receivers. SCROLL encryption method is ideal for one transmitter to one receiver. > STATIC > STAT I C SECURE KEY SECURE KEY > S C R O L L SECURE KEYDigital Stereo Rack TransmitterDigital Stereo Rack Transmitter
22 23520.500MHzAFLINE02 03GR CH L R EQLSCROLL: new encryptioniconSTATIC: existing encryption520.500MHzAFLINE02 03GR CH L R EQLTransmitterSCROLL encryption mode is ideal for a single receiverReceiver RX1RX2RX3STATIC encryption mode is ideal for multiple receiversiconTransmitterReceiver (13) FREE SCAN Settings: SCAN for an interference-free transmitter channel > FREE SCAN SECURE KEY > FREE SCAN SECURE KEY > 0 1 01 5 1 2 . 000MHz > 01 512.000MHz 01 FREE SCAN FREE SCANA. Operating Instructions:a. Locate FREE SCAN menu, press to activate setting.b. Press to enter setting (highlighted in black). Turn left or right to scan for an open Channel within the specified Group. Press to save.c. Once save, press to return to listed menus.d. FREE SCAN scans for an interference-free channel within the specified Group only. e. Use FREE SCAN to analyze the RF environment for interference and identify available frequencies. During scanning process the transmitter stops transmission. When no interference-free channel is located, it reverses automatically back to the original channel. Note: When performing a FREE SCANTurn on potential sources of interference such as other wireless systems or devices, computers, CD players, large LED panels, effects processors, and digital rack equipment so they are operating as they would be during the presentation or performance (so the scan will detect and avoid any interference they generate). FREE SCAN > 0 1 502.125MHz 08 ..... FREE SCAN > 01 502.125MHz 02 Digital Stereo Rack TransmitterDigital Stereo Rack Transmitter
24 25520.500MHzAFLINE02 03GR CH L R EQL< 30cm (12 in.)What is ACT ?1. ACT is short for Automatic Channel Targeting. ACT is a proprietary sync technology developed first by MIPRO in the professional audio industry. Consequently, ACT sync has become an industry-standard for fast, easy and precise frequency synchronization between transmitter and receiver. Features 1. Frequency do not require an external tool for adjustment. 2. Precise and fast synchronization.3. Frequency is synchronized and saved and ready for repeat usage.Operating Instructions?1. Press the ACT sync button on the rack transmitter to start the synchronization. 2. ACT SYNC word with moving “….” appears on the rack transmitter screen.3. Align the ACT sync windows of both receiver & transmitter within 30cm.4. ACT SYNC word with moving “…”disappears during a successful sync and returns back to main LCD screen. 5. ACT FAIL appears during a failed sync.6. Repeat step 1 to 5.MIPRO's Proprietary ACT Sync Function(14) EXIT & SAVE Settings: Save changes and exit > & SAVEEXIT FREE SCANA. Operating Instructions:a. Press to exit and return to the main LCD screen.520.500MHzAFMIC02 03GR CH L R EQLPress sync button to synchronize frequency & encryption key to bodypack receiver.ACTDigital Stereo Rack TransmitterDigital Stereo Rack Transmitter
Press ACT sync buttonACT FAIL appears during a failed synchronization A. Operating Instructions:a. Press the ACT sync button on the transmitter to activate the synchronization.b. Align the ACT sync windows of both transmitter and receiver within 30cm (12-inch) and 10 seconds.c. During syncing, the transmitter LCD screen display is flashing "ACT SYNC ...” .d. If synchronization is done successfully, the transmitter LCD return to the main screen.e. If synchronization is done unsuccessfully, it displays SYNC FAIL. Repeat steps 1-4 until is done successfully.** During ACT sync, the frequency is synchronized from transmitter to receiver. Other setting as an encryption key (SCROLL or STATIC) is also synchronized during the transfer.(14) ACT Synchronization26 27512.000MHzAFLINE01 01GR CH L R EQL > 01 01 5 1 2 . 000MHz > 01 01 5 1 2 . 000MHz ACT SYNC . . . . . . . . ACT FAILNetwork Interface1. See connection diagram below for connection from REMOTE connectors located at the rear panel of the transmitter via RS-232 or USB connection to RS-232 COM PORT or USB PORT.Wiring InstructionsTX1TX2TX3Network ConnectionMIPRO DVUMIPRO DVJORPCConnect to RS-232 jack on PCConnect to keyboard jack on PCConnector of keyboard should plug in hereConnect to USB jack on PC1. Connect REMOTE OUT to REMOTE IN of another transmitter for interconnection of other transmitters. First transmitter (TX) 1, connect REMOTE IN to a MIPRO-DV.2. Up to 64 transmitters can be linked and connected. 3. Up to 300 meters of internet connection is possible. However, we recommend for up to 100 meters to ensure optimal performance and quality of high-speed transmission.During Synchronization… Digital Stereo Rack TransmitterDigital Stereo Rack Transmitter
Rack-mounting a 1/2 rack unit!Rack-mount with an optional FB-71 rack-mount kit and fasten accordingly.Rack-mounting two 1/2 rack units side-by-side!Remove top & bottom screws.!Insert top and bottom plates to joint two transmitters. Fasten screws. !Rack-mount with an optional FB-72 rack-mount kit. 28 29Rackmount Kit Cautions Recommendations& !Do not use the same frequency bands when mixing MIPRO IEM and MIPRO wireless microphone systems to avoid potential interferences. !When using RG-58 or 3D cable, do not exceed 5 meters and use 50Ω coaxial cable to transmit signals to the external antenna.!If possible, maintain line-of-sight between transmitter and receivers for optimal reception quality during outdoor or indoor performances. Indoor reception quality tend to degrade due to obstacles and objects absorbing radio waves making the reception distance shorter compared with outdoor performances. !Power supply voltage should not be less than 12V and not higher than 15V. Ensure at least 500mA or more output current. Deficient current causes operating voltage instability or malfunction and exceeding current causes shorter the product life cycle and possible short or damaging circuits. !!NoteRefer to actual product in the event of product description discrepancy.Frequency range and maximum deviation comply with the regulations of different countries.Digital Stereo Rack TransmitterDigital Stereo Rack Transmitter

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