Rolls MX442 Mixer Manual & Schematic 电路图.pdf

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1、MX442 Field Mixer OWNERS MANUAL + - 0 100 10 LEVEL 0 10 LEVEL 0 10 LEVEL 0 10 LEVEL 0 10 CH. 1CH. 2CH. 3CH. 4MASTERHEADPHONE MX442 400 Hz TONE MIC SLATE RLRLRL RL VU 310 VU 310 POWER PANPANPANPAN LEVELLEVEL RadioFans.CN 收音机爱 好者资料库 Thank you for your purchase of the Rolls MX442 Field Mixer. The MX442

2、 is a breakthrough in price/performance for the broadcast engineer, remote sound engineer etc. This unit was researched and devoloped by industry professionals. You told us what you wanted, and we built it. Please read through the following manual to ensure proper operation of this unit. FEATURES La

3、rge calibrated VU meters for easy monitoring in any light +48 volt phantom power on each input Panning Slate Mic with a 20Hz tone 400Hz setup tone Low Cut switches Trim controls on each channel Uses 2: 9-volt batteries or 12-volt ac adapter 5-position Headphone Monitor switch Battery test switch and

4、 indication on meters Remote mix input Low or high level output (-25 or +4 dB) Mono or stereo operation Built-in adjustable limiter INSPECTION 1. Unpack and inspect the MX442 box and package. If obvious physical damage is noticed, contact the carrier immediately to make a damage claim. We suggest sa

5、ving the shipping carton and packing materials for safely transporting the unit in the future. 2. Please complete the Warranty Registration Card and return it to the factory. TABLE OF CONTENTS Introduction.1 Features. Inspection. Description.2 Front Panel. Left Panel. Right Panel . Rear Panel .3 Con

6、nection. 3 Operation. 3 - 4 Specifications .4 Schematic .4 Block Diagram and Warranty .Rear Cover 1 RadioFans.CN 收音机爱 好者资料库 2 DESCRIPTION FRONT PANEL 0 10 CH. 1CH. 2CH. 3CH. 4MASTERHEADPHONE MX442 400 Hz TONE SLATE RLRLRLRL VU 310 VU 310 POWER PANPANPANPAN LEVEL FIELD MIXER LEFTRIGHT 0 10 LEVEL 0 10

7、 LEVEL 0 10 LEVEL 0 10 LEVEL 0 10 LEVEL MIC LEFT/RIGHT VU Meters: Indicate the level of signal that is being monitored, or the signal present at the Headphone Output. The meters also indicate battery voltage. MIC: This is the Slate Mic. When the SLATE button is pressed, this mic picks up signal at i

8、ts input and sends the signal via the Master Level control to the Right and Left Outputs. SLATE: Engages the Slate Mic as well as a 20Hz tone. CH1 - CH4 LEVEL: Varies the signal level of the indicated channel to the mix bus. CH1 - CH4 PAN: Controls the amount of relative signal sent for the indicate

9、d channel to either the Right of Left bus. Limiter Adjust: This screwdriver adjustable potentiometer (not labeled on the panel) adjusts the amount of signal limiting by the MX442. MASTER: varies the overall signal from the MX442 Right and Left Outputs. HEADPHONE: Controls the level of signal sent to

10、 the Headphone Output. Power LED: Indicates that the MX442 is on. 400Hz TONE: When pressed, sends a 400Hz 0 dB reference sine wave signal to the Right and Left Outputs. LEFT PANEL MIC 1 - 4: Balanced XLR connectors for connection to dynamic or condenser microphones. +48 volts of phantom power is ava

11、ilable for each input. TRIM 1 - 4: Adjusts the input gain to the indicated channel. 20 dB PAD (CH 1 - 4): When in, attenuates that channels input level by 20 dB. LOW CUT (CH 1 - 4): When in, attenuates that channels frequency response below 100 Hz. RIGHT PANEL + - HEADPHONE SELECT: Selects which sig

12、nal is being sent to the Headphone Output as well as the front panel meters; Stereo, Mono, Right, Left, or the Monitor signal. BATT TEST: When pressed in, indicates the current battery condition via the front panel VU meters. Use the black percent- age scale. HEADPHONE Output: 1/4” TRS stereo jack f

13、or connection to any standard pair of headphones. MONITOR IN: 1/4” TRS stereo input jack for connection to a cue or monitor mix. AUX IN: 1/4” TRS stereo input jack for joining two units together, or adding a stereo line-level signal. LEFT OUT: Main Output - Balanced XLR jack containing the left port

14、ion of a stereo signal, for connection to a recording device, mixer, or amplifier. RadioFans.CN 收音机爱 好者资料库 3 RIGHT OUT: Main Output - Balanced XLR jack containing the right portion of a stereo signal, for connection to a recording device, mixer, or amplifier. -25/+4 dB Switch: Sets the output level

15、of the Main LEFT and RIGHT Output jacks to -25 dB or +4 dB. POWER: Toggle switch, when positioned towards the power jack; applies power to the MX442. 12 - 16 VDC: Input connector for connection to an auxiliary power source such as a Rolls PS27. REAR PANEL BATTERY COMPARTMENT: Holds two 9V Alkaline b

16、atteries to power the MX442. DIP SWITCH: Switch 1 activates and bypasses the internal limiter. Switch 2 selects the MX442 Output Mode; Mono or Stereo. Switch 3 through 6 activates the phantom power for the indicated microphone channel. NOTE: The switch is “ON” when in the DOWN position. CONNECTION C

17、onnect XLR microphone cables to the Microphone inputs and to the microphones. If necessary, apply phantom power to any condenser microphone. Connect the Right and Left Master Outputs to the recording device or amplifier via XLR cables. Stereo headphones are to be connected to the Headphone Output, t

18、he Auxiliary input may be connected to another MX442 or other stereo signal source, the Monitor input may be connected to the master mixing board for a monitor or cue mix. OPERATION Setting the Mic Levels Begin by plugging in the microphone(s). Set the channel Level controls at 3 Oclock, and the Mas

19、ter Level control at approxi- mately 12 Oclock. Speak into the microphone and adjust the Trim control until the average meter reading is 0 VU. For recording in stereo, adjust the Pan control to place the signal in the stereo field. The Slate and Mic switch Press the Slate button and speak into the S

20、late Microphone to send the 20Hz slate tone and message to the main outputs and the recording device. The 400 Hz Tone switch Press in this switch to send a 400 Hz reference tone to the output for setting system levels. The 20 dB Pad switch Some condenser microphones put out a high amount of signal w

21、hich makes it difficult to set the Trim and Level controls easily without overloading the gain circuits. The 20 dB Pad switch is pressed in if the microphone is “too hot” or putting out a very high level signal. The Low Cut switch The Low Cut switch, when pressed in, rolls off the low frequencies st

22、arting at 100 Hz. This is used for removing unwanted “rumble”. The Headphone Select Switch There are many instances where different portions of the signal need to be monitored. When microphones are panned to different areas of the stereo field, sometimes one mic may be completely right and another c

23、ompletely left, it may become necessary to monitor each side individually. To monitor the signal present at the Right Main Output, select the “Right” setting. Similarly, set the Headphone Select to “Left” to monitor the Left Main Output. To hear both sides in stereo, select “Ster”; to hear both sign

24、als summed together in mono, select “Mono”. Finally, hear the stereo signal present at the Monitor Output, select “Monit”. The Monitor Input jack This input receives a 1/4” Tip-Ring-Sleeve stereo signal, and is typically used for monitoring another mixing board at a master location. For example, the

25、 Right and Left mix from the MX442 is sent to a master console where a mixing engineer is controlling the audio sent to a main television or radio station. This engineer may need to send cues and other instruction to the person operating the MX442. A mix of the signals sent from the MX442 and the mi

26、xing engineers voice may be sent via a 1/4” TRS stereo line to the MX442 MONITOR IN and the person operating the MX442 can hear both his mix and the mixing engineer. The Aux Input jack This 1/4” TRS stereo jack joins the main mix just before the Master and Headphone Level controls. This input is use

27、d whenever other signals need to be mixed with the MX442 signals, and sent to the MX442 Main Outputs. The Output Level -25/+4 dB switch Some master mixing boards will need to receive line level (+4 dB) signals, and others may have preamplifiers that cannot by bypassed and therefore will need to see

28、mic level (-25 dB) signals. Most recording devices are designed to receive line level signals. 4 The DIP switches The 6-DIP switch located on the rear panel provides phantom power for each individual microphone input, selects mono or stereo output operation, and activates the internal limiter. The l

29、imiter is used to compress the overall MX442 signal to a level which will not exceed +4 dB. Note that this limiter may be adjusted by the screwdriver potentiometer located between the Channel 3 and Channel 4 Pan pots. If the MX442 is being used in an area where there is a wide dynamic range of sound

30、s (the sound varies from very quiet to very loud), the limiter is used to keep the signal within a certain manageable range. The Mono/Stereo switch, when in the Mono (down) position, both the Right and Left outputs are summed together. Finally, switches 3 through 6 provide the indicated channel with

31、 +48 volts of phantom power to power condenser type microphones. SPECIFICATIONS ? ? ? ? ?!? ?#?$? %?%?&?(?!)*?+?#?#?,?&#?- .?/? ?01 ?.?/?01 ?&?*?&#?01 2?3?4? (? /0)?5?67 0 ROLLS CORPORATION 5968 South 350 West Salt Lake City,UT 84107 019-Jul-2000 Title Size: Date: Rev: Sheetof Rb PHAN PHAN ? ? ? ? V

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