Rauland Telecenter V - Mcx300 Tuner-Cassette With Schematic 电路图.pdf

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1、KI-I 657A MCX300 AM-FM Tuner and Cassette Tape Player RAULAND-BORG CORPORATION ? 3450 West Oakton Street, Skokie, Illinois 60076-2951 ? (708) 679-0900 General Information Description 2 The Rauland MCX3OOAM-FM Tuner and Cassette Tape Player comes ready to be rack-mounted. It includes a separate 12-VD

2、C power supply that can be plugged into any convenient 120-VAC power outlet. There are screw 1 termlnals for connecting the external antenna required 1 for the AM-FM tuner, and an RCA-type phono jack for 1 connecting the units unbalanced monaural audio output to a sound or communications system. The

3、 audio output provides an ample signal for the auxiliary Input of an amplifier or a communications sys- tem. See the attached diagram KM0949 for the spade end should fit over a #6 screw terminal. 75R shielded cable from the antennas to the tuner. Lighming-protection system. Shielded cable to connect

4、 the MCX300 to a sound or communications system. One end should have an RCA- type phono plug; the other, a suitable connector for the sound or communication systems Auxiliary or Tuner input. Required Antenna An external 75-ohm antenna is required for the AM-FM tuner. The type of antenna to use depen

5、ds upon the equipments location within the building and the strength of the radio signals in the area. For most installations, Rauland recommends the antenna system shown in Wir- ing Diagram KM0710 (attached). Note that the system should be installed with some protection against lightning. Articles

6、810 and 820 of the National Electrical code, ANSI/NFPA No. 70-1978, provide detailed information regarding the grounding of (a) the mast and the supporting structure, (b) the lead-in wire to an antenna discharge unit, and (c) the coaxial cable sys- tem. The Code also specifies the size of the ground

7、ing conductors, the locations of the antenna discharge units, the connections to the grounding electrode, and the requirements for the grounding electrode. An example of an installation meeting these requirements is given on the attached Illustration IL0153. Installation Location The unit may be pla

8、ced in practically any rack with: clearance in front of the outlet (to allow for the ?a 120-VAC outlet within reach of the power supplys plug); cord (about six feet) and with enough room to insert ? a 19-inch standard width, a 3 inch vertical space, the power supply: about 2.1 inches wide, 2.2 inche

9、s and an and high (plus the cord strain relief), and 2% inches0 an even, moderate temperature. 1990 RAULAND-BORG CORPORATlON ? Printed in U.S.A. Orig. Rev. 5/90 Page 1 of 5 RadioFans.CN 收音机爱 好者资料库 MCX300 AM-FM Tuner and Tape Player Rack-mounting Step 1. If the racks boles are not tapped, insert #lO

10、“U” nuts over the four holes that you will use. Note: On some extruded holes, you may have to omit the “U” nuts and use thread-forming screws (not sup plied). Step 2. Prepare the four supplied machine screws by placing a black metal washer and then a fiber washer over each one. Step 3. Insert the MC

11、X300 in the rack and fasten it with the four prepared screws. Initial Antenna Connections Step 2. Connect the Inner conductor to the Dist (“Dis- tant”) antenna screw terminal and the shield to the Gnd screw terminal. To ensure a proper antenna reference, connect a #22-AWG or larger wire between the

12、Gnd screw terminal and the equipment rack (if it is grounded) or some other earth ground. Step 1. Cut the antenna lead to the proper length and attach suitable terminal lugs to the inner conductor and shield. Audio Output Connections Step 1. Use a single-conductor shielded cable of suit- able length

13、 to connect the Audio jack on the back of the chassis to the Auxiliary or Tuner input of the sound or communications system. One end of the cable should terminate in a male RCA-type phono plug; the other end should have a connector that matches the input to the sound or communications system. Step 2

14、. Plug the RCA-type phono plug into the Audio jack of the MCX300, and the other end of the cable into the Auxiliary or Tuner input of the main system. Power Connections Insert the DC power plug of the power supply into the Pwr Sply jack on the back of the MCX300, then plug the power supply itself in

15、to a suitable 120-VAC outlet. Setting the Controls The following settings can be tried initially. Make ad- justments as needed to obtain the best performance. You may find it helpful to play t h e unit through its monitor speaker and adjust the controls for the most pleasing sound there. Volume: Bet

16、ween “3 oclock” and “6 oclock.” Tone: The fully clockwise setting is flat. Rotating this control counterclockwise rolls off the treble. Balance: Center (note, however, that the units output is wired to blend the left and right channels, so this control has little effect). Fader: Center (note, howeve

17、r, that the units output is wired to blend the front and rear channels, so this control has little effect). Antenna Adjustments Step 1. Tune in a strong AM station around 1400 KHz. Step 2. If AM station overload is a problem, transfer the inner conductor lead from the Dist to the Local terminal on t

18、he back of the chassis. Outdoor Antennas The attached IL0153 suggests a grounding system for an AM/FM antenna system; KM07 10, on page 6, illustrates a way of mounting the AM and FM antennas. The following Rauland-Borg parts are used in the sug- gested system: (A) FMT-65 FM Antenna. (B) LVO027 AM/FM

19、 Antenna Coupler, which includes: 0 The coupler itself. ? An outdoor housing. ? Two screws for mounting the coupler inside the housing. ? A “U” bolt and related hardware for mounting the housing to the mast. 0 Two “F” connectors for plugging the coaxial cables into the coupler. (C) QC0126 Lightning

20、Arrestor. This includes the hardware needed to mount the coupler to the mast. The remaining parts shown in KM0710 (wires, coaxial cable, the masts, and the AM insulators) are readily avail- able from suppliers. Important: Mount the parts firmly to the mast, as shown in the illustrations, to properly

21、 ground the an- tenna system. Operating Instructions Refer to the separately supplied vendors instructions for the tuner and cassette players operation and care. front-panel speaker. ? The “Program” position plays the unit through the The Monitor-Program Switch interconnected system. ? The “Program/

22、Monitor” position plays the unit The MCX300 includes a front-panel speaker and a four-position switch: 0 The “Monitor” position plays the unit through the through both the system and the monitor speaker. ? The “Off” position disconnects the units output from both the system and the monitor speaker. Page 2 RadioFans.CN 收音机爱 好者资料库