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TUA100FA

100W SOLID STATE

UHF POWER AMPLIFIER

BROADCAST PRODUCTS

04/99

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Summary of Contents for TUA100FA

Page 1: ...P O Box 68 White Haven PA 18661 Phone 570 443 9575 FAX 570 443 9257 MDS MMDS ITFS LPTV North America South America Europe Asia Australia Africa Since 1960 TUA100FA 100W SOLID STATE UHF POWER AMPLIFIER...

Page 2: ...TUA100FA 100W SOLID STATE UHF POWER AMPLIFIER BROADCAST PRODUCTS 04 99...

Page 3: ...arts Ordering II CIRCUIT DESCRIPTION 2 1 Power Amplifier Drawer III MAINTENANCE 3 1 Periodic Maintenance Schedule 3 2 Recommended Test Equipment 3 3 Troubleshooting Chart 3 4 Alignment 3 5 TTU100FA Tr...

Page 4: ...I THE TUA100FA POWER AMPLIFIER 1 1 Introduction 161 1 2 Specifications 161 1 3 Installation 162 1 4 Operation 163 1 4a TTU100FA Transmitter 163 1 4b TU100FA Translator 164 1 5 Warranty and Parts Orde...

Page 5: ...rpose of broadcasting as authorized by the Federal Communications Commission under Part 74 Subpart G of the FCC Rules and Regulations 1 2 Specifications Output Power 100W peak visual 10W average aural...

Page 6: ...should have a minimum power capacity of 700 watts 4 Set all circuit breakers and switches including the ac mains breaker to the OFF position Place an appropriate ac power line protector surge suppress...

Page 7: ...ace the TUA100FA Amplifier A3 POWER switch to ON and meter switch to FWD Verify the following responses of the amplifier drawer a The fans of the amplifier should be exhausting out the rear of the dra...

Page 8: ...STANDBY and place the OPERATE ALIGN switch to OPERATE Place the meter switch to FWD and the POWER circuit breaker to ON Then verify the following responses of the transmitter a The fans of the driver...

Page 9: ...e g water or lightning Semiconductors are excepted from this warranty and shall be warranted for a period of not more than ninety 90 days from date of shipment Equipment or component parts sold or use...

Page 10: ...nce Such a discrepancy is possible since manufacturing changes cannot always be incorporated immediately into the instruction manual Module Referencing The transmitter consists of drawers containing m...

Page 11: ...ON 2 1 Power Amplifier Drawer 261 2 1a 100W UHF Amplifier Module 261 2 1b UHF Notch Filter 262 2 1c Metering Coupler 262 2 1d Metering Detector 262 2 1e Metering Display Assy 263 2 1f Indicator Circui...

Page 12: ...tion via the Metering Switch PC2 Also on the front panel is the Indicator Circuit PC3 which has three LEDs to indicate if the drawer is operational the power amplifier has overheated or if the amplifi...

Page 13: ...maximum Notch Depth 12dB minimum Notch Frequency Visual Carrier 4 5MHz Aural Carrier 4 5MHz This filter is a tunable two section notch filter that removes the spurious products created through common...

Page 14: ...wer is applied to pin 5 of connector J4 designated VIS PWR REF This power reference is fed back to the driver s A2A1 AGC circuit contained in the IF Upconverter This voltage ultimately controls the at...

Page 15: ...ic 1 placing approximately 5V across the green section of LED DS1 Buffer U2 essentially passes the logic 0 bypassing the red section of the LED to ground thus extinguishing it If the amplifier module...

Page 16: ...3 3 Troubleshooting Chart 362 3 4 Alignment 364 3 4a UHF Notch Filter 364 3 5 TTU100FA Transmitter Power Calibration 364 3 5a Forward Power 364 3 5b Reflected Power 365 3 6 TU100FA Translator Power Ca...

Page 17: ...ssary No lubrication needed 3 2 Recommended Test Equipment EQUIPMENT MANUFACTURER MODEL Digital Multimeter HEWLETT PACKARD E2378A Oscilloscope TEKTRONIX 2232 VHF Sweep Generator WAVETEK 2001 50 Ohm RF...

Page 18: ...and 5V regulator U3 output on Indicator Circuit board PC3 Faulty module or 32V Power Supply Shut off Xmtr Xltr RF drive While monitoring the 32V supply remove the dc plug from each module and PC board...

Page 19: ...NG CHART PROBLEM INDICATORS CAUSE SOLUTION 363 LOW OUTPUT POWER OR DISTORTED OUTPUT NO fault indicated Notch Filter misaligned See Section 3 4a Xmtr Xltr Driver misaligned Refer to the TTU TU20F Instr...

Page 20: ...annel can be found in Section 4 the Data Pak or in Table 261 5 Remove the sweeper cable from the filter input and the RF Detector from the drawer output Replace the Notch Filter input cable 3 5 TTU100...

Page 21: ...the TUA100FA Power Amplifier drawer adjust potentiometer R30 of the Metering Detector fully clockwise to disable the VSWR overload detection circuit Place the amplifier drawer meter switch to REFL 7 P...

Page 22: ...utput of the translator Therefore when measuring these power levels as shown in Figure 367 be sure to take into account the 30dB factor provided by the attenuator Power levels at 50 APL stair steps ar...

Page 23: ...eiver s IF OUTPUT and the Transmitter s IF INPUT and set the step attenuator for 10dB attenuation 7 Place the Transmitter s OPERATE STANDBY switch to OPERATE Remove attenuation from the stepper for an...

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Page 30: ...RE MODULES LIST INTERCONNECTION DIAGRAM 30383170 REV 53 DESCRIPTION VENDOR PART DESIGNATOR UHF Power Amplifier EMCEE 40383176 2 A1 32V Power Supply ASTEC MP6 3T 00 PS1 Metering Detector EMCEE 60368050...

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