_______________________________________________________________________________________________ Section 4 - Diagram Contents: - Cable diagram - MTF0070CR0 RF Amplifier module Cable Diagram - MTF0070CR0 RF Amplifier module Connections Diagram - MTF0070CR0 Amplifier module - Component list - SCH0192AR0 (200W UHF LDMOS Amplifier module) - SCH0223AR1 (Control board and display) - SCH0221AR1 (Amplifier interface) - SCH0265AR0 (Mains distribution board) - SCH0288AR1 (Interface board) - E0012 (SP500-27-DI Switch
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Component list MTF0070CR0 Amplifier module Part Name Code Description Qty 00001 01041D 00221B 03207 SCH0192AR0 SCH0221AR0 SCH0248AR0 SCH0249AR0 SCH0250AR0 SCH0251AR0 SCH0252AR0 PN1091A 02402 02512 01400 01408 DET0726 DET0727 DET0728 DET0729 DET0730 DET0732 DET0734 DET0736 DET0807 DET0810 DET0811 DET0812 DET0819 DET0828 DET0839 08502 08527 03017 PN0998A 0W 1206 SMD RESISTOR 2 1nF 1206 2% SMD CAPACITOR 2 75W 1206 1% SMD RESISTOR 2 HSMS-2802*L31 DIODE 2 200W UHF LDMOS AMPLIFIER MODULE 9 AMPLIFIER INTERFA
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Component list APT144A - AUTV/1500LD Part Name Code Description Qty 05553B V0962 V0760 SCH0223AR1 SCH0265AR0 MTF0070CR0 09419 PN1114A 07925 07515C 07524A 07541 02830 02893 02894 02695 02699 02700 02228 02502 02876 02877 07605A 07605B 07605F 01041 00664 FUS1A FUS3A FUS5A CON0171 CON0178 DET0516 DET0772 Z0021 Z0081 Z0673 E0012 PAN0074 08503 DET0575 SCH0288AR2 CON0237 CON0238 DET0996 DET0995 KIT MANIGLIE 5-6U cod. 235.013 MORSETTIERA/GIUNZIONE ELECO E806 TAPPI NERI 0 9.
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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.
AMPLIFIER INTERFACE SCH0221AR0 Component layout SCH0221AR0 COMPONENT LIST SCH0221AR0 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 10K-S 00053A R 220R-S 00033A R 270R-S 00034A R 4K7-S 00049A TR BC856 03455 01065A CERAMIC COND 01795B ELETT. COND.
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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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INTERFACE BOARD SCH0288AR1 Component layout SCH0288AR1 COMPONENT LIST SCH0288AR1 Part Name/Number Description Qty. Comps.
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.
C31 FG AC/L FS1 F10A/250VAC C16 CN2 V- L1:B TR134 474/250VAC C1 D7 HER104 C32 102/250VAC X 8.9V R31 ZD4 8.9V X SP-500A DIFFERENT COMPONENT: MODEL 13.5V 12V PART NO . D8 HER104 C15 B Q8 A562 Q7 D2 1N4001 8.9V X 15V E C1815 C CN2 B 8.9V X CN2 F+ CN2 T+ D4 HER104 D6 HER104 8.9V X 27V NC(PSF) Terminal P5 24V R+ CN4 R- R4 51/2W T- BD1 15A/600V TRC1 BTA16-600B R2 10/5W ZNR1 471 C6 104/100V B LF2 TF-360 C17 220u/25V C7 474/250VAC R17 30K/2W 8.
UHF BANDPASS FILTER FC4E80C 1.5kW, 4 Poles (Cross Coupling) Code 06674 FEATURES - UHF 1.5kW analog TV output filter - 4 poles elliptical response - Cross Coupling technique (two transmission zeros) - Foreshorten folded combline structure - Iris couplings with fine bandwidth regulation - 3D Electromagnetic CAD - High selectivity and low loss (Typ. 0.28dB @ V.C. Ch.
Tunings (T1, T2, T3, T4) can be regulated simply by means of a suitable screwdriver. Couplings (K12, K23, K34) are regulated varying the insertion of the Post Screws, which are located between the resonators; the insertion of the Post Screws increases the bandwidth, except for K23 which has the opposite effect of decreasing bandwidth as it is inserted. In order to execute this regulations it is necessary to loosen every lock nut by means of a pipe wrench n. 19.
and bandwidth couplings K12/K34 and K23. Improve the tuning by repeatedly acting as before. The electrical symmetry implies K12 equal to K34 (same heights) and KE/KE (same rotation angle). Regulate K14 each pass to set the transmission nulls. IMPORTANT NOTICE: the most effective tuning for analog TV channels is NOT equiripple, bus has -30dB R.L. at middle peak and -35dB R.L. at outer peaks. 4. A high quality tuning will exhibit deep return loss dips, as in reported diagram.
5c. Turn back to frequency domain mode to check the tuning. Maybe the filter is perfectly tuned, but slightly shifted in center frequency. This dependes upon a possible small difference between response centre and electrical centre frequencies. It is straighforward in this case to centre the filter acting on the tunings. 5d. A high quality tuning will exhibit deep return loss dips, as in reported diagram.