ORBAN 2200 Manual Section 2 电路图.pdf

pagecontents Section 2 Installation pagecontents 2-2Installation of 2200 2-7Figure 2-1: AC Line Cord Wire Standard 2-9Figure 2-2: Wiring the 25-pin Remote Control Connector 2-17Basic System Setup 2-27System Setup Controls 2-27I/O CALIB (I/O Calibration) 2-32Stereo Encoder (and processing Pre-Emphasis) 2-34Remote Interface 2-35TEST Mode CAUTION The installation and servicing instructions in this manual are for use by qualified personnel only. To avoid electric shock, do not perform any servicing other than that contained in the Operating Instructions unless you are qualified to do so. Refer all servicing to qualified service personnel. OPTIMOD-FM 2200INSTALLATION 2-1 RadioFans.CN 收音机爱 好者资料库 Installation of 2200 Allow about 2 hours for installation. Installation consists of: (1) unpacking and inspecting the 2200, (2) optional resetting of jumpers for 2200 options (composite output impedance, input termination, input sensitiv- ity), (3) checking the line voltage setting, fuses and power cord, (4) mounting the 2200 in a rack, (5) connecting inputs, outputs and power, (6) setting the GROUND LIFT switch, (7) and optional connecting of remote control leads. When you have finished installing the 2200, proceed to “System Setup,” on page 2-16. 1. Unpack and inspect. AIf you note obvious physical damage, contact the carrier immediately to make a damage claim. Packed with the 2200 are: 1Operating Manual 1Quick Setup Guide 1Line Cord 2 12A Replacement Fuses for “U” and “J” Versions 2250mA Replacement Fuses for “E” Version 1Orban green screwdriver (Xcelite R3323) 1Booklet: Audio Quality in the FM Plant BSave all packing materials! If you should ever have to ship the 2200 (e.g., for servicing), it is best to ship it in the original carton with its packing materials because both the carton and packing material have been carefully designed to protect the unit. CComplete the Registration Card and return it to Orban. (please) The Registration Card enables us to inform you of new applications, performance improvements, and service aids that may be developed, and it helps us respond promptly to claims under warranty without our having to request a copy of your bill of sale or other proof of purchase. Please fill in the Registration Card and send it to us today. (The Registration Card is located after the cover page). We do not sell or give away our customers names to anyone. 2-2 INSTALLATION OPTIMOD-FM 2200 RadioFans.CN 收音机爱 好者资料库 2. Change standard factory configuration, if required. Skip this step if your installation does not have any special requirements. The 2200 is supplied from the factory with its jumpers set to the configuration correct for most installations. Stereo Encoder Composite Output Impedance 0 Input Impedance10k Input Sensitivity10dBu or greater (+5dBu to +27dBu peak) ATo change any jumpers you must remove the top cover of the 2200 to access the main circuit board. (Make sure power is not connected.) Remove all screws holding the cover in place, then lift it off. (Be careful not to strip threads when opening the cover.) BRefer to Figure 2-1 to find the jumpers on the main circuit board and to position them according to your application. The following information is provided to explain each jumper and its settings in detail. Stereo encoder composite output impedance. Do not change the default 0 jumper setting unless your installation needs 75 source impedance. The stereo encoder is shipped from the factory with 0 source impedance. This is correct for virtually all installations. However, the 2200 stereo encoder can be changed to 75 source impedance if desired. The frequencies in the stereo baseband are low by comparison to RF or video, and the characteristic impedance of coaxial cable is not 75 at lower frequencies, so the transmission system will have more accurate amplitude and phase response (and thus, better stereo separation) if the cable is driven by a very low source impedance (0) and is terminated with greater than 1k at the exciter. However, a few broadcast organizations require that FM composite be transmitted in impedance-matched coaxial cable with 75 source and load impedances. To change the source impedance of one or both of the composite outputs: To change the source impedance of composite output #1, move jumper JA to the “75” position (Fig 2-1). To change the source impedance of composite output #2, move jumper JB to the “75” position (Fig 2-1). Analog left/right input termination. Do not change the default setting unless your installation requires 600 termination on the analog left/right inputs. The analog left/right inputs are shipped from the factory with balanced bridging (10k) input impedance. However, the 2200 analog inputs can be changed to 600 input impedance. OPTIMOD-FM 2200INSTALLATION 2-3 RadioFans.CN 收音机爱 好者资料库 To change the input impedance of the analog left/right inputs: Move jumpers J301 and J305 according to Figure 2-1. Jumper J301 sets the left channel and jumper J305 sets the right channel. Set analog left/right input sensitivity. Skip this step if your installation will supply the 2200 with nominal input level of 10dBu or greater (+5dBu to +27dBu peak). The analog left/right inputs are shipped from the factory with input sensi- tivity to accommodate inputs whose absolute maximum peak level is between +5dBu and +27dBu. If VU meters are used, +5dBu to +27dBu absolute peak corresponds to a 0VU level of approximately 9dBu to +13dBu. If PPMs are used, +5dBu to +27dBu absolute peak corresponds to a PPM level of approximately 2dBu to +20dBu. However, in unusual circumstances where the input level is very low, the 2200 analog inputs can be changed for greater sensitivity. This usually occurs only when the studio-to-transmitter link is a long telephone or post line with a passive equalizer at the receive end and no amplifier to make up the loss of the line and the equalizer. To increase the input sensitivity of the analog input to accommodate absolute peak levels of 17dBu to +5dBu (nominal levels down to 30dBu): Move jumpers J302, J303, J306, J307 and J308 according to Figure 2-1. Jumpers J302 and J303 set the left channel and jumpers J306 and J307 set the right channel. Jumper J308 sets the control circuit to recognize the new input sensitivity. CReplace the 2200 top cover. Replace all screws snugly. (Be careful not to strip threads by fastening the screws too tightly.) 2-4 INSTALLATION OPTIMOD-FM 2200 OPTIMOD-FM 2200INSTALLATION 2-5 2200 Rear Panel Voltage Selector (for Model Numbers 2200/U, 2200-D/U, 2200/E and 2200-D/E) can be set to 115V (for 100-132V operation) or 230V (for 200-264V operation); (for Model 2200/J and 2200-D/J) set to 115V (for 89-120V operation). Fuse values can be changed to support 115V or 230V operation. Fuse must be 3AG Slow-Blow, 12-amp for 115V, or 14-amp (250mA) “T” type for 230V. Power Cord is detachable and is terminated in a “U-ground” plug (USA standard), or CEE7/7 plug (Continental Europe), as appropriate to your 2200s Model Number. GND LIFT (Ground Lift) Switch can be set to GND (to connect the 2200s circuit ground to its chassis), or to LIFT (if you are using the 2200s stereo encoder, and are driving its composite output into an unbalanced exciter input). Remote Control Interface is provided to connect the 2200 to a remote control. The 2200 remote control accepts a DB-25 connector and supports user-programmable selection of up to eight inputs for any one of the following parameters: user presets, factory presets, bypass, tone, exit test, stereo, mono left, mono right, mono sum, analog input, digital input (Model 2200-D only), digital input + J.17 pre-emphasis (Model 2200-D only). A valid signal is a momentary transition from no-current to current flowing through the particular remote signal pins. Current must flow for at least 50ms for the signal to be interpreted as valid. It is acceptable to apply current continuously to an input, DC or AC. Do not exceed 9 volts unless you use an external current-limiting resistor that limits current to 10mA. COMPOSITE 1 OUTPUT and COMPOSITE 2 OUTPUT are provided, each with independent output level control (via front panel Comp 1 and Comp 2 controls). Each output uses a BNC connector. ANALOG INPUT and ANALOG OUTPUT provided to support left and right audio signals through XLR-type connectors. Digital AES/EBU INPUT and AES/EBU OUTPUT (Model 2200-D only) are provided to support two-channel AES/EBU-standard digital audio signals through XLR-type connectors. 2-6 INSTALLATION OPTIMOD-FM 2200 3. Check the line voltage, fuse and power cord. ADO NOT connect power to the unit yet! BCheck the voltage selector. This is on the rear panel. Refer to the units rear panel for your Model Number and the inside of the front cover of this manual for your Model Numbers line voltage setting. Model Numbers 2200/U, 2200-D/U, 2200/E and 2200-D/E are shipped configured for either 100-132V or 200-264V, 50Hz or 60Hz operation, as indicated on the rear panel. To change the operating voltage, set the voltage selector to 115V (for 100-132V) or 230V (for 200-264V) as appropriate. Model Number 2200/J and 2200-D/J are shipped for 89-120V, 50/60Hz operation. The voltage selector should be set to 115V (for 89-120V). CCheck the value of the fuse and change the fuse if the value is incorrect. For safety, the fuse must be Slow-Blow 12-amp for 115V, or 250mA (14-amp) “T” type for 230V. DCheck power cord. AC power passes through an IEC-standard mains connector and an RF filter designed to meet the standards of all international safety authorities. The power cord is terminated in a “U-ground” plug (USA standard), or CEE7/7 plug (Continental Europe), as appropriate to your 2200s Model Number. The green/yellow wire is connected directly to the 2200 chassis. If you need to change the plug to meet your countrys standard and you are qualified to do so, see Figure 2-2. Otherwise, purchase a new mains cord with the correct line plug attached. CONDUCTOR WIRE COLOR L N E LINE NEUTRAL EARTH GND BROWN BLUE GREEN-YELLOW BLACK WHITE GREEN NORMALALT PLUG FOR 115 VAC (USA) CONDUCTORWIRE COLOR L N E LINE NEUTRAL EARTH GND BROWN BLUE GREEN-YELLOW PLUG FOR 230 VAC (EUROPEAN) TYPE H05VV - F - 0.75 TYPE 18/3 SVT COR, TYP (3 x .82 mm 2) Figure 2-1: AC Line Cord Wire Standard OPTIMOD-FM 2200INSTALLATION 2-7 4. Set Ground Lift switch. The GND LIFT switch is located on the rear panel. The GND LIFT switch is shipped from the factory set to ground (to connect the 2200s circuit ground to its chassis ground). If you are using the 2200s stereo encoder, and are driving its composite output into an unbalanced exciter input, set the GND LIFT switch to LIFT. This will break a ground loop that could otherwise occur. Unbalanced exciter inputs can cause hum and noise because it is difficult to control the system grounding. If hum or noise appears that cannot be cured by resetting the GND LIFT switch, we suggest that you install the optional Orban CIT25 Composite Isolation Transformer at the exciters input to balance it. If you use the CIT25, set the 2200s GND LIFT switch to GND. If you are not using the 2200s stereo encoder, set the GND LIFT switch to ground. 5. Mount the 2200 in a rack. The 2200 requires one standard rack unit (134 inches/4.4 cm). There should be a good ground connection between the rack and the 2200 chassis check this with an ohmmeter to verify that the resistance is less than 0.5. Mounting the unit over large heat-producing devices (such as a vacuum-tube power amplifier) may shorten component life and is not recommended. Ambient temperature should not exceed 113F/45C when equipment is powered. Equipment life will be extended if the unit is mounted away from sources of vibration, such as large blowers. The shorter the baseband cable run from the 2200 to exciter, the less likely that ground loops or other noise problems will occur in the installation. If you require a long cable run, it is usually best to mount the RF exciter close to the 2200, and to make the long cable carry the RF output from the exciter to the transmitters RF power amplifiers. 2-8 INSTALLATION OPTIMOD-FM 2200 6. Connect remote control. (optional) The 2200 has extensive remote control provisions, which are described on page 2-34. Optically-isolated remote control connections are terminated in a type DB-25 male connector located on the rear panel. It is wired according to Fig. 2-2. To select the desired function, apply a 5-12V AC or DC pulse between the appropriate REMOTE terminals. The () terminals can be connected together and then connected to ground at pin 1 to create a REMOTE COMMON. If you use 48V, connect a 3.6K 10%, 1-watt carbon composition resistor in series with the REMOTE COMMON or the (+) terminal to provide current limiting. A current-limited +9VDC source is available on pin 25. In a high-RF environment, these wires should be short and should be run through foil-shielded cable, with the shield connected to the connector shell at both ends. 7. Connect inputs and outputs. See the hook-up and grounding information on the following pages. Audio Input and Audio Output ConnectionsPage 2-10 Composite OutputPage 2-12 AES/EBU Digital Input and Output (2200-D only)Page 2-11 GroundingPage 2-12 PIN ASSIGNMENT REMOTE INTERFACE Figure 2-2: Wiring the 25-pin Remote Control Connector OPTIMOD-FM 2200INSTALLATION 2-9 Audio Input and Output Connections Cable We recommend using two-conductor foil-shielded cable (such as Belden 8451 or equivalent), because signal current flows through the two conductors only. The shield does not carry signal, and is used only for shielding. Connectors Input and output connectors are XLR-type connectors. In the XLR-type connectors, pin 1 is CHASSIS GROUND, while pin 2 and pin 3 are a balanced, floating pair. This wiring scheme is compatible with any studio wiring standard: If one pin is considered LOW, the other pin is automatically HIGH. Analog Audio Input Nominal input level between 30dBu and +8dBu will result in normal operation of the 2200. (See step 2 on page 2-3 for a full discussion). (0dBu = 0.775Vrms. For this application, the dBm 600 scale on voltmeters can be read as if it were calibrated in dBu.) The peak input level that causes overload is dependent on the setting of the AI CLIP control. It is adjustable from 17dBu to +27dBu in two ranges. The electronically-balanced input uses an ultra low noise and distortion differ- ential amplifier for best common mode rejection, and is compatible with most professional and semi-professional audio equipment, balanced or unbalanced, having a source impedance of 600 or less. The input is EMI suppressed. Input connections are the same whether the driving source is balanced or unbal- anced. Connect the red (or white) wire to the pin on the XLR-type connector (#2 or #3) that is considered HIGH by the standards of your organization. Connect the black wire to the pin on the XLR-type connector (#3 or #2) that is consider