Table of Content 1. Preliminary instructions 2. Warranty 3. First Aid 3.1 Treatment of electrical shocks 3.2 Treatment of electrical Burns 4. General Desciption 5. Installation and use 5.1 Preparation 5.2 Operation 5.3 Software 6. Controls, Indicators and Connectors 6.1 Front Panel 6.2 Rear Panel 6.3 Connectors Description 7.
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In this case can be requested to user to take the necessary measures. R.V.R. Elettronica SpA reserves the right to modify the design and/or the technical specifications of the product and this manual without notice. User Manual Rev.
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2. Warranty Any product of R.V.R. Elettronica is covered by a 12 (twelve) month warranty. For components like tubes for power amplifiers, the original manufacturer’s warranty applies. R.V.R. extends to the original end-user purchaser all original manufacturers warranties which are transferable and all claims are to be made directly to R.V.R.
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Replacement and warranty parts may be order from the following address. Be sure to include the equipment model and serial number as well as part description and part number. R.V.R. Elettronica SpA Via del Fonditore, 2/2c 40138 BOLOGNA ITALY Tel.
3. First Aid The personnel employed in the installation, use and maintenance of the device, shall be familiar with theory and practice of first aid. 3.1 Treatment of electrical shocks 3.1.1 If victim is not responsive follow the A-B-C's of basic life support •...
3.1.2 If victim is responsive Keep them warm • • Keep them as quiet as possible • Loosen their clothing (a reclining position is recommended) • Call for medical help as soon as possible 3.2 Treatment of electrical Burns 3.2.1 Extensive burned and broken skin •...
RF amplified signal to be forwarded to the antenna output. The HC4 is produced in the version for four transmitters of 1 kW max output power everyone (total 4 kW).
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In this way, it is possible to interact (locally or remotely) with the device even in absence of mains supply. The HC4 can be connected to the exciter of the transmitter using a “interlock” cable, so that it is possible for it to deactivate RF power emission in case of misfunctioning of the transmitting system.
RF amplifiers. In the following description, we will in general refer to these external devices. As soon as the HC4 is supplied, verify that the ON LED is lit. The LCD display shows a presentation screen, and after a few seconds it will pass to the default screen, showing the values of the forward and reflected power..
Otherwise, the user will only be allowed to read the parameters, but not to change any of them. The management of the HC4 is performed by a generic software used in different classes of equipment produced by R.V.R. Elettronica SpA, like the HC combiners or the RF amplifiers PJ500M-C and PJ1000M.
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Switch ON ~ 5 sec Main Screen Selection Menu ENTER Function Menu ENTER Power Menu ENTER P.A. Menu ENTER Threshold Menu ENTER Alarms Menu ENTER Miscellaneous Menu ENTER Version Menu Figure 5.1 After a few seconds, the main screen will be displayed, reporting the values od Forward power and Reflected power: The management software will remain indefinitely in this default screen, until the user pushes the ESC button.
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From this menu, the user can “switch” ON and OFF the hybrid coupler. The result of this command is that when the HC4 is put in OFF mode, the inner conductor of the “Alarm” connector is shorted to ground, so that the exciter is put in stand-by mode (this will happen only if provided with an interlock connector, and if correctly connected with the hybrid coupler).
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5.3.3 Power Amplifier Menu (P.A.) This multi-line scrollable menu reports to the user some internal measurement of the device: • Voltage (VPA) - Not active Current (IPA) - Not active • • Efficiency - Not active • Temperature • Mains voltage (Mains - percentage variation with respect to the nominal voltage) The complete aspect of the screen is the following figure (please note that only two lines at a time are visible, use the UP and DOWN buttons to scroll): Please note that the first three lines of this screen are not active since they are not...
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(Reflected Warning). The thresholds are expressed as percentage of full-scale value of the relevant quantity. The full scakle values for the HC4 are the following: Forward power 4000W •...
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The function of this menu is essentially a help for the technician to identify the causes of possible malfunctions of the transmitter. 5.3.6 Various menu Two operations can be performed using this menu: Setup the address of the I C serial bus type connection •...
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Foldback The foldback circuit controls the level of a dc voltage that is available on the dedicated BNC connector (F.BACK) on the rear of the HC4. The foldback voltage remains approximately constant until one of the amounts that are connected to the foldback doesn’t surpass its nominal value (full scale).
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If any reason makes it impossible to reach a new stable point, the protection system of the HC4 will react with its Shut off/Restart procedure. 5.3.8.2 Shut off/Restart...
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6. Controls, Indicators and Connectors This chapter describes the front and rear panels of the HC4, with a brief indication of all the different components. 6.1 Front Panel [1] DISPLAY LCD Display. [2] ON Green LED, lit when the amplifier is switched on.
6.2 Rear Panel [1] INTERLOCK/ALARMS BNC connectors to inhibit an exteral device, as an exciter. In case of fault, the inner connector is shorted to ground. [2] R.F. MONITOR BNC RF monitor output. The output level is -60 dB below the power output in the band 87.5-108 MHz.
Dig Out OC Active when the coupler is “ON” Notes: • To give a command to the HC4 (ON, OFF, Reset), bind the relative pin to ground for approx 500 ms. • OC output (Open Collector) are “Active” when conducing.
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6.3.3 I C Connector Type: DB9 Female - Used for I C networking Serial Data Serial Clock 22 / 34 Rev. 1.0L - 01/04/02 User Manual...
7. Technical Specifications 7.1 Dimensional and Environmental Specifications Cabinet Dimensions 454 mm x 265 mm x 615 mm Panel Dimensions 483 mm x 132.5 mm Weight Approx. 30 Kg -10 °C ÷ 50 °C Operating Temperature Range Umidity 90% Maximum, whithout condensation 7.2 Electrical Specifications A.C.
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8. Electrical description HC4 is composed of different modules wired between them with connectors, allowing for easy servicing or module substitution. RF output to Amp 1 RF input from exciter RF output RF Splitter to Amp 4 Telemetry, RS232, Display, Keys Interlock ...
9. Theory of Operation The figure shows the block diagrams of HC4. The blocks are described in the following chapter: 9.1 Power supply This equipment has only a transformer with different outputs. The used outputs are: 0-18V for the supply of the remote card and 0-11,5V for the CPU section. The rectifiers and the stabilizers are in the two cited cards.
The hybrid coupler is factory-adjusted so that the transmitter it is included in will work satisfyingly works over the whole FM band. Cases may happen, that it is necessary to perform the RF adjustment of the HC4, for example if the RF interconnection cables with the amplifiers have been sustituted with other of slightly different characteristics or length, or if it is desirable to optimize the transmitter’s performances on a certain frequency.
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and at minimum power. On the coupler, set the display for the visualization of forward power. Set the variable capacitor in their middle position. Gradually increase the exciter power until the overall output power of the transmitter reaches around the 80% of its nominal power. Adjust the variable capacitors (1) and (2) (Figure 9.1) related to the first amplifier, to maximize the forward power measured in the coupler Figure 9.1...
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MAINTENANCE LEVEL 1 10.3 Routine Maintenance The only regular maintenance needed by HC4, is the periodic substitution of the blowers, and the cleaning of dust filters and any dust accumulated inside the amplifier. The time between overhauling of the blowers depends upon several environmental factors, temperature, humidity, dust pollution etc.
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10.4.2 Unbal Power Card Replacement • Open the top and bottom covers of the unit. • Unsolder the wires connecting the unbal power card to the other devices. • Unsolder the coaxial cable that connecting the unbal power card to the power coupler.
NOTE: This section describe the adjustment of the CPU group, in case of a substitution if it is breakdown. • After changing the assembly, connect the amplifier as shown in the figure below. • Switch ON the HC4. Temperature reading adjustment • Measure the temperature of the cooling fin with a thermometer. •...
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Trimmer TR7 adjustment • The trimmer TR7 must be turned completely counter-clockwise, to protect the input channel to the CPU. FOLBACK intervention adjustment • Be sure that the exciter is not operative. • Measure the voltage on the PIN1 of JP7 on the power supply card with a multimeter, than rotate the trimmer TR9 to obtain a voltage of 0V.
Questa parte del manuale contiene i dettagli tecnici riguardanti la costruzione delle singole schede componenti l’HC4. L’appendice è composta dalle seguenti sezioni: This part of the manual contains the technical details about the different boards of the HC4.
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HYBRID POWER SPLITTER Bill Of Materials Page 1 Item Q.ity Reference Part DESCRIPTION PART ORDER CDE ________________________________________________________________________________________________ R2,R3,R4,R5 50 KDI RES. DI TERM. (KDI) RDT250H0050 RESISTOR 1/4W 5% RSC1/4JH0100 3P3HQ CERAMIC CAPACITOR HQ CSM3,3xk351 C4,C8,C10,C14,C16,C20, T10/80PF TRIMMER CAPACITOR C22,C26 C5,C6,C11,C12,C17,C18, 15PFHQ CERAMIC CAPACITOR HQ CSM150XK351...
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POWER METER CARD Bill Of Materials Page 1 Item Q.ty Reference Part DESCRIPTION PART ORDER CDE ____________________________________________________________________________________________ 47KCH CHIP RESISTOR RCC1/4JK0047 TC200CH TRIM. REG. VERT. CERMET SMD 33PF CERAMIC CAPACITOR NP0 CKM330BJ600C C2,C3,C4 1NFCH CERAMIC CHIP CAPACITOR CCC102AJ500 BAT83 HOT CARRIER DIODE DHCBAT83 Appendice Tecnica Rev.
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