_______________________________________________________________________________________________ Section 4 - Diagram Contents: - Cable diagram - APT159A AUTV/500LD Power Supply Section - APT159A AUTV/500LD RF Section - APT159A AUTV/500LD Lateral View - MTF0083AR0 Amplifier module - Component list - SCH0192AR0 (200W UHF LDMOS Amplifier module) - SCH0259AR0 (RF Amplifier interface) - SCH0223AR1 (Control board and display) - SCH0288AR0 (Amplifier interface) - SCH0265AR0 (Mains distribution board) - E0012 (SP5
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Component list MTF0083AR0 Amplifier module Part Name Code Description Qty 08502 08521 08527 00028A 01096 03207 07904 07907 SCH0192AR0 SCH0295AR0 PN0998A PN1079A PN1078A PN1083A 02402 02512 01041 01400 00424 DET0868 DET0842 DET0843 DET0844 DET0845 DET0846 DET0847 DET0849 00383 00403 00436 00027A 00041A 03017 07911 07910 PN1210A DET0805 DET1059 DET0813 DET1058 0148 RG 316 50W CABLE RG179 BU 75W CABLE HF-85 ENDIFORM CABLE 82W 1206 SMD RESISTOR 1nF CHIP MULT.
Component list APT159B - AUTV/500LD Part Name Code Description Qty 05570 05578 APT159A 02502 08504 CMS6006 02029 CSS5011 DET0483 DET0631 PAN0080 PAN0081 PAN0082 06673 GUIDE FOR RACK TAV. 816RB RKG6 560mm ZN RACK 20U RK20 600mm DEPTH AUTV/500LD LDMOS UHF AMPLIFIER MEANWELL SMA SOCKET FOR RG58/c J01150A0041 RG58 50W CABLE 1/2 FORM 1mt CABLE 7/16 (M) CONN. BN203391 GE35145 D/60 BN (UG909/c FOR RG58) RG58 FROM 1.5mt NM/NM CABLE DET0483R0 BAR. PR. 683 REG. PCAV ZN P. 2557 DET0631R1 ANGOL. FISS.
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200W UHF LDMOS AMPLIFIER MODULE SCH0192AR0 DESCRIPTION The RF module is an integrated TV linear amplifier designed for UHF band, this module employs push-pull LDMOS technology in order to achieve very good efficiency, high linearity and reliability. LDMOS transistors operate in AB class. It is a wideband amplifier over the full frequency, no adjustment is required for the channel change. The board includes RF section amplifier, bias circuit, protection circuit and matching networks.
- Curve response graphic Middle frequency 660MHz, span 500MHz, 2dB/div., reference to the arrow CALIBRATION PROCEDURE - Technical characteristics Power supply voltage Polarisation current Gain for low signal 32V (± 2%) 1.0 cold for each device (2A total), ± 0.
- Calibration steps STEP 1. Close the input and the output of the module by connecting them to a 50W W dummy load and connect the spectrum analyser through a directive sample, in order to look for self-oscillation of the module, if any (anyway the module has been designed so that it would not self-oscillate even if totally decoupled, without any input or output load). STEP 2.
capacitive trimmers, between the two pair of gates, as shown by the mounting plan. STEP 5. Connect serially a c.c. amperometer to the power supply, with scale starting from more than 5A (i.e. 10A). STEP 6. Power the module and check the MOSFET is not absorbing current; this means that the device is integral and working correctly. STEP 7.
Component layout SCH0192AR0 45
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COMPONENT LIST SCH0192AR0 REF.
REF.
REF. DESCRIPTION ELETTRONIKA CODE B2 B3 B4 L1 L2 L3 L4 H1 H2 NTC1 NTC2 IC1 IC2 DZ1 DZ2 DZ3 DZ4 DL1 DL2 PN964AR3 COAX 2:1 BALUN COAX 4:1 BALUN COAX 4:1 BALUN 4 TURNS SILV. COP. WIRE 1.2mm WOUND ON OD 5mm 4 TURNS SILV. COP. WIRE 1.2mm WOUND ON OD 5mm ½ TURN COIL ½ TURN COIL HYBRID COUPLER 3dB 90° ANAREN HYBRID COUPLER 3dB 90° SAGE NTC 100KW PTH NTC 100KW PTH DG419DY DG419DY 15V SMD ZENER DIODE 15V SMD ZENER DIODE 6.8V SMD ZENER DIODE 6.
RF AMPLIFIER INTERFACE SCH0259AR0 Component layout SCH0259AR0 COMPONENT LIST SCH0259AR0 Part Name/Number Description Qty. Comps. CC 100nFAVX 01065A CE 100uF100V CE 100uF50V 01795 CE 10uF35V-S 01778A D 1N4007 03009 D 6CWQ10FN IC LM317HV J FC-16P 02701-02700 J SCREWCONN2 02853 J SCREWCONN3 02860 J TESTP1.3mm 07913 JU JUMP2 02739-02742 JU JUMP3 02707-02742 R 0R33-1W-S R 100K-S 00065A R 220R-S 00033A R 22K-S 00057A R 270R-S 00034A R 4K7-S 00049A TR BC856 03455 01065A CERAMIC COND 01795B ELETT. COND.
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CONTROL BOARD AND DISPLAY SCH0223AR1 DESCRIPTION The control board SCH0223AR1 manages the operational logic of the amplifier: switching on and off, power supply and fans, alarms and protections, remote control, human-machine interface. All of that is performed by a modern and powerful 16 bit micro-controller, which is the main part of the board. Figure 1 shows the block diagram.
It can be seen that the micro-controller is the heart of the control system, to which the various peripherals (power supply, serial ports, telemeasure socket, AGC port, RF amplifier module, ROM, clock, display and keys) are interfaced. - Power Supply The board is powered with a continuous +24V voltage applied on the J14 connector. From that the +5V voltage, powering the most of the chips (micro-controller, operational amplifiers, display, etc.) is derived by means of a switching converter (see IC19).
RF AMPLIFICATION The J3 connector interfaces the control board with the RF amplification section. Through this connector the micro-controller acquires the forward and reflected powers, unbalancing (if any), and temperature of the critic amplification area. It also allows to inhibit the transistors in case of reflected power alarm, by means of a totally hardware, thus extremely fast protection. Depending on the apparatus, this connector may also allow to enable or disable the cooling fans of the critic area.
TELEMEASURES The J9 telemeasure connector (10 pins socket) is directly wired on a DB9 female connector placed on the rear panel. There are input and output digital lines (TTL level) and analog output lines on this connector, which are used to monitor and control the amplifier by means of a general-purpose remote control system.
level of the interlock signal becomes high (this line has a pull-up towards the +5V power supply voltage as well) and the interlock protection activates switching off the amplifier. Note that in case the interlock protection is not used, the pin 4 of the DB9 telemeasure connector and the earth pin (pin 5) must be short circuited. Otherwise it is possible to disable the monitoring of the interlock chain from menu (see user manual).
PIN N° ON DB9 PIN N° ON J10 TYPE DIRECTION 1 1 - - 2 3 Digital Output AGC Alarm 0V = Alarm 5V = Normal 3 5 Digital Output AGC Alarm 0V = Alarm 5V = Normal 4 7 - - Not used 5 9 - - Not used 6 2 - - Not used 7 4 - - Nout used 8 6 Analog Output Forward power 9 8 Analog Output Forward power DESCRIPTION Ground Table 4: Description of the AGC connector RS232 The DB9 female connector on the front panel is an external communication RS232 serial port, through which a
FIRMWARE UPDATE The microcontroller is provided with a built-in Flash memory containing the firmware. The firmware can be updated with a later version without removing the apparatus from the rack and/or replacing the chip. To upgrade it, connect a PC to the RS232 socket on the front panel of the apparatus by means of a cable DB9 male - DB9 female (pin-to-pin). Launch on the PC the EKAFlash application, select the serial port in use on the PC, choose the update file by pressing the ...
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COMPONENT LIST SCH0223AR1 Part Name/Number Description Qty. Comps.
Part Name/Number Description Qty. Comps. IND MS85 10uH-S IND T100uH-1.
INTERFACE BOARD SCH0288AR1 Component layout SCH0288AR1 COMPONENT LIST SCH0288AR1 Part Name/Number Description Qty. Comps.
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MAINS DISTRIBUTION BOARD SCH0265AR0 Component layout SCH0265AR0 COMPONENT LIST SCH0265AR0 Part Name/Number Description Qty. Comps. CC 2nF2 2kV 01045A CNV AC-DC ATC-12S D 1N4148 03001 DL LEDG3 03053 J CON HD515V/05-4PVE J CON HD515V/05-5PVE R 2K7 0046 RL 40.31.
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SP500-27-DI SWITCHING POWER SUPPLY E0012 SPECIFICATION MODEL SP-500-27 (E0012 Code) SP-500-48 (E0013 Code) DC Output Voltage Output Rated Current Output Current Range Ripple & Noise (p-p) DC Output Power Efficiency DC Voltage Adj. Over V. Protection Input Voltage Range Input Frequency Power Factor Overload Protection 27Vdc 18A 0-18A 200mVp-p 486W 87% 24-30V 31V-36.5V 88-264Vac 47-63Hz 0.95/100-240Vac 105%-135% Type: Foldback current limiting Recovery: Auto > =70°C Output Shutdown Temp.
R71 5K1 C57 103/100V C53 104/63V U51:2 MOC3022 D54 1N4148 R80,81 27/1W 39/1W C71,72 331 /1KV 221 /1KV 27V 48V PART NO.
75 C31 FG AC/L FS1 F10A/250VAC C16 CN2 V- L1:B TR134 D7 HER104 X 8.9V R31 ZD4 8.9V X SP-500A DIFFERENT COMPONENT: MODEL 12V 13.5V PART NO. C15 B Q8 A562 CN2 B C6 104/100V ZNR1 471 Q7 8.9V X 15V E C1815 C D2 1N4001 8.9V X CN2 F+ CN2 T+ D4 HER104 D6 HER104 T- 8.9V X 27V NC(PSF) Terminal P5 24V R+ CN4 R- 51/2W R4 TRC1 BTA16-600B R2 10/5W BD1 15A/600V 8.
UHF BANDPASS FILTER 600W, 3 Sections + 2 Notches Code 06673 FEATURES - UHF 500W analog TV output filter - 3 bandpass resonators and 2 notches - Foreshorten in-line combline structure - Iris couplings with fine bandwidth regulation - Phase regulation netween bandpass and notches - Low loss (Typ. 042dB @ Ch.
TECHNICAL DESCRIPTION The output filter mod. 06673 is made up of a 3 resonators bandpass filter and two notches. It can be tuned on all the channels of the UHF TV band (470 - 862MHz) and according to all worldwide standards (4.5 6.5MHz intercarrier). The bandpass section is composed by the three middle resonators, while the two resonators apart are the notches. The filter is symmetrical; therefore, the choice of the lowest and the hightest notch is indifferent.
3.Tune the bandpass section on the required channel, and match input and output until a correct response is achieved. During this step, the tunings of the two notches shall be kept well far from the bandpass response. Regulate the bandwidth at -24dB to the ends of span (E. g. std. G: BW (-24dB) = 27,5MHz). The input/ output couplings may influence the external resonators; therefore, it will be necessary to repeatedly fix the formers after the latters in small steps.
SAMPLE FREQUENCY RESPONSE DIAGRAM 79
