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Revision A

T-48 90 008 026

2-19

The Test Set will take the receiver sensitivity measurement four (4)

times and average the results. The number in the upper right corner

counting;

01-02-03

signifies the sensitivity test progressing.

The final test in the manual sequence will end with an alternating display of transponder RF power output
(54dBm), receiver sensitivity (-75dBm) and transponder frequency (1090.0 MHz). The second page
displays power in watts.

Appendix A contains a sample Transponder Test procedure utilizing the T-48 Test Set.

POWER,RCVR & FREQ 01
TESTING

POWER,RCVR & FREQ
54dB-75dB 1090.0 MHz

POWER,RCVR & FREQ
250W-75dB 1090.0 MHz

Содержание T-48

Страница 1: ...5 230 VAC 50 400HZ CAGE CODE 92606 USA MOD 1 2 3 4 5 6 TEST INTERROGATE ACCESSORIES REPEAT OFF STORE ANTENNA LIGHTS OFF Transponder Test Set Operating and Maintenance Manual P N 90000026 REVISION Tel...

Страница 2: ...ible by including the page figure table number and send the information to Tel Instrument Electronics Corp Attention Technical Publications We will make every effort to resolve the issue in a timely a...

Страница 3: ...Revision A T 48 90 008 026 i T 48 MOD 3 TABLE OF CHANGES Date REV ECO Page Description 7 26 2002 A Initial Release...

Страница 4: ...Regulatory Responsibilities 1 2 1 4 Warranty 1 2 1 5 Safety Considerations 1 3 Section B Equipment Description 1 6 Specifications 1 4 1 7 Abbreviations Acronyms and Glossary of Terms 1 5 II Preparatio...

Страница 5: ...Automatic Sequence of Transponder Tests 2 11 2 11 2 Mode 3A C Manual Sequence of Transponder Tests 2 12 2 11 3 Mode S Automatic Sequence of Transponder Tests 2 13 2 11 4 Mode S Manual Sequence of Tes...

Страница 6: ...eceiver Local Oscillator Test 4 6 4 3 5 Omni Directional Antenna Transponder Test 4 6 4 3 6 TAP 135 Antenna Coupler Test 4 7 4 3 7 TAP 141 Direct Connect Antenna 4 8 Section C Annual Calibration and A...

Страница 7: ...nge to Digital 6 10 Cable Assembly Digital Range to RF 6 11 Cable Assembly LCD to Digital 6 12 Cable Assembly RF ANT Front Panel 6 13 TAP 135 Sub Assembly 6 14 TAP 141 Direct Connect Coupler Assembly...

Страница 8: ...Panel Interconnect Diagram Schematic 5 4 5 4 RF PCB Assembly 5 Pages Total Schematic 5 5 5 5 Digital PCB Assembly 4 Pages Total Schematic 5 10 5 6 Digital Range PCB Assembly Schematic 5 14 6 1 T 48 Ca...

Страница 9: ...Revision A T 48 90 008 026 vii List of Tables Table Title Page 2 1 T 48 MOD 3 Accessories 2 2 2 2 Controls Indicators and Connectors 2 3 2 3 Pulse Width and Spacing Criteria 2 21...

Страница 10: ...2 3 4 5 6 TEST INTERROGATE ACCESSORIES REPEAT OFF STORE ANTENNA LIGHTS OFF Figure 1 1 T 48 T 48A MOD 3 Transponder Ramp Test Set 1 2 Purpose and Function of the Equipment The T 48 T 48A MOD 3 Test Set...

Страница 11: ...n Tel s judgment that it is thus defective This warranty does not include batteries NiCad batteries have a 90 day warranty This warranty does not extend to any of Tel products which have been subject...

Страница 12: ...ies greatly improves the time it takes to complete the tests 4 Pay particular attention to NOTES and WARNINGS that may accompany some test procedures NOTE 5 Observe all standard safety procedures when...

Страница 13: ...ty 15 dBm Transponder Tests Receiver Sensitivity Range 65 to 88 dBm accuracy 3 dB Radiated Power 40 57 dBm 2 dB 10 500 watts Frequency 5 MHz 100KHz Reply Efficiency 0 to 99 1 Measurements made utilizi...

Страница 14: ...displayed when the transponder is determined to be a MODE S CW Continuous Wave D A Digital to Analog dB Decibel dBm Decibels above 1 milliwatt dc or DC Direct Current DME Distance Measuring Equipment...

Страница 15: ...ansmissions made by a MODE S transponder not in reply to an interrogation for the use of the collision avoidance system Surveillance Altitude An interrogation that causes only the addressed MODE S tra...

Страница 16: ...cation for shipping or extended storage Examine the unit for obvious signs of damage Check all displays switches and connectors before utilizing the Test Set If any damage is found DO NOT use the Test...

Страница 17: ...mbly AC Line Cord 75010025 1 3 TAP 135 Antenna Coupler 10 ft 89000145 1 4 Direct Connect Coupler TAP 141 89000147 OPTIONAL 5 TSP 1A Omni Antenna 40030011 1 6 Foam Insert Case 31000007 1 8 Operators Ma...

Страница 18: ...AC POWER Indicator Green LED indicates battery charging and AC power connected When the battery alone is being used the LED will not illuminate 5 VOLTAGE CHANGE FUSE CARTRIDGE Contains 2 250V amp remo...

Страница 19: ...AC 0 125 FTT T 48 MODE S ATCRBS TRANSPONDER RAMP TEST SET TEL INSTRUMENT ELEC CORP TYPE WATTS PART NO SERIAL NO INPUT 115 230 VAC 50 400HZ CAGE CODE 92606 USA MOD 1 2 3 4 5 6 TEST INTERROGATE ACCESSOR...

Страница 20: ...continue testing By observing a duty cycle of 50 the Test Set batteries will begin regaining their charge while testing is in progress It is strongly recommended that the batteries are charged for a...

Страница 21: ...the T 48 Test Set This is useful to determine and troubleshoot problems by separating the aircraft antennas and cables from the rest of the system The TAP 141 also provides the means to accurately me...

Страница 22: ...nsponder equipped ensure the correct antenna and transponder is selected 6 If unfavorable results occur when utilizing the Omni Antenna move closer to the transponder antenna and re test Aircraft exte...

Страница 23: ...wer frequency sensitivity and diversity measurements 2 The TAP 141 supplies an attenuated path protecting the Test Set from the high RF power associated with transponders 1 Ensure power to the transpo...

Страница 24: ...1 Transponder Test Sequence The T 48 is capable of testing ATCRBS Mode A Mode C and Mode S transponders The operator may select an Automatic sequence of tests ending in the Power Receiver Sensitivity...

Страница 25: ...EST MODE S SURV SHORT TEST MODE S COMM IDENTITY TEST UNDESIRED REPLIES TEST MODE S COMM ALTITUDE TEST SQUITTER TEST DIVERISTY TEST MAX TRUE AIRSPEED TEST VERTICAL STATUS BIT TEST POWER RCVR FREQ TEST...

Страница 26: ...he operator is alerted to continued and potential failures if testing is resumed Once the sequence is stopped due to a failure the operator may override and continue testing by depressing the INTERROG...

Страница 27: ...RE REPEAT switch on the T 48 The MODE 3A test will commence and the display will indicate IDENT verifying the SPI pulse was received IDENT signal received The TEST switch must then be pushed once more...

Страница 28: ...selecting the Automatic sequence of tests the results of the tests will not be displayed until the final test is completed At that point the POWER RCVR FREQ display will be shown and testing will end...

Страница 29: ...nless a failure was detected Mode 3A test complete Display indicates the transponders 4096 Octal code 1234 and receiver efficiency 100 as a percentage To test the transponder IDENT function press the...

Страница 30: ...MODE S transponder will not reply to an ATCRBS Only All Call A PASS displayed indicates that the Mode S transponder did not reply TEST button pressed to advance to next test MODE 3C ONLY test initial...

Страница 31: ...Hexadecimal aircraft altitude and flight status is displayed TEST button pressed to advance to next test MODE S COMM A Identity test initialized The Test Set transmits a COMM A B ABCD transmission ut...

Страница 32: ...Test Set will transmit no interrogations but receives and processes DF 11 and extended DF 17 replies After detection of the replies is received two alternating pages will be shown displaying the time...

Страница 33: ...pressed to advance to next test The VERTICAL STATUS BIT test is not performed during the auto sequence of Mode S tests Test Set receives the Vertical Status as part of the UF 0 format A display of ONE...

Страница 34: ...progressing The final test in the manual sequence will end with an alternating display of transponder RF power output 54dBm receiver sensitivity 75dBm and transponder frequency 1090 0 MHz The second...

Страница 35: ...g between F1 and F2 and Pulse width of F2 DP Signifies a Data Pulse Failure F1 Pulse Width F1 F2 Spacing F2 Pulse Width A FAIL signifies a F1 F2 Width failure or a Framing Pulse Spacing Failure F1 out...

Страница 36: ...Set also performs Framing Pulse Width and Data Pulse Tests With 1234 entered the T 48 will measure Framing Pulses their width and their spacing The Test Set will also measure each Data Pulse in their...

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TEL T-48, Руководство по эксплуатации и техническому обслуживанию

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