TEL T-48 Operating And Maintenance Manual

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T-48/T-48A

TEST

INTERROGATE

ACCESSORIES

REPEAT

OFF

STORE

Operating and Maintenance Manual

Tel-Instrument Electronics Corp

Leading the AVIONICS TEST industry into the 21

MOD 3

T-48

MODE S/ATCRBS

TRANSPONDER RAMP

TEST SET

Transponder Test Set

P/N-90000026

REVISION

728 Garden Street

Carlstadt, NJ 07072

(201) 933-1600

www.telinst.com

ANTENNA

LIGHTS

TEL-INSTRUMENT ELEC. CORP

TYPE

WATTS

PART NO.

SERIAL NO.

INPUT 115/230 VAC 50-400HZ

CAGE CODE 92606 USA

MOD 1

50-400 HZ, SINGLE PHASE

120/220 VAC, 25 WATTS

120 VAC- 0.25 FTT, 220 VAC-0.125 FTT

OFF

Century!

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Summary of Contents for TEL T-48

Page 1 T-48/T-48A MOD 3 ANTENNA TEST LIGHTS TEL-INSTRUMENT ELEC. CORP T-48 TYPE WATTS MODE S/ATCRBS PART NO. INTERROGATE SERIAL NO. TRANSPONDER RAMP INPUT 115/230 VAC 50-400HZ TEST SET CAGE CODE 92606 USA MOD 1 50-400 HZ, SINGLE PHASE 120/220 VAC, 25 WATTS 120 VAC- 0.25 FTT, 220 VAC-0.125 FTT...
Page 2 This manual provides and explains information pertinent to the operation, use and maintenance of the Tel Instrument T-48/T-48A MOD 3 Test Set. Because aircraft systems vary dependent on the type of aircraft, this manual is intended as a guideline. If further clarification or additional...
Page 3 Revision A T-48 90 008 026 T-48 MOD 3 TABLE OF CHANGES Date Page Description 7-26-2002 Initial Release...
Page 4: Table Of Contents
Revision A T-48 90 008 026 Table of Contents Chapter Page Table of Changes……………………………………………………………………………… i List of Illustrations…………………………………………………….………………………. vi List of Tables……………………………………………………….…………………………. vii Introduction Section A- General Information Scope of Manual……………………………………………………………………... 1-1 Purpose and Function of the Equipment……..……………………………………… 1-1 Regulatory Responsibilities…………………………………………......1-2 Warranty……………………………………………………………………………...
Page 5 Revision A T-48 90 008 026 Table of Contents (continued) Chapter Page Section C- Operating Instructions General………………………………………………………………......2-5 Battery Operation……………………………………………………………………. 2-5 2.8.1 220 VAC Operation…………………………………………………………... 2-5 Supplied Antennas…………………………………………………......2-6 2.9.1 Omni-Directional Antenna……………………………………......2-6 2.9.2 Antenna Coupler (TAP-135)…………………………………………………. 2-7 2.9.3 Direct Connect Coupler (TAP-141)………………………………………….. 2-8 2.10...
Page 6 Revision A T-48 90 008 026 Table of Contents (continued) Chapter Page Section A- Routine Maintenance General………………………………………………………………………………. 4-2 4.2.1 Cleaning Procedure…………………………………………………………... 4-2 4.2.2 Inspection of Connectors, Cables and Test Assembly……………………….. 4-2 4.2.3 Battery Check and Charging…………………………………………………. 4-3 Section B- Test Set Verification and Acceptance Checks General……………………………………………………………………………….
Page 7 Digital Range PCB Assembly……………………………………………………….. 5-14 VI Illustrated Parts Breakdown/Parts List T-48 Case Assembly…………………………………………………………………………... 6-2 T-48 Front Panel Assembly (1 of 3).………………………………………………………… 6-3 RF Box Assembly……………………………………………………………………………... 6-9 Cable Assembly, Digital Range to Digital……………………………………………………. 6-10 Cable Assembly, Digital Range to RF………………………………………………………… 6-11 Cable Assembly, LCD to Digital………………………………………………………………...
Page 8: List Of Illustrations
Revision A T-48 90 008 026 List of Illustrations (Figures) Figure Title Page T-48/T-48A MOD III Transponder Ramp Test Set….…………………......1-1 T-48 Accessories…………………………………………………………………………. 2-2 Controls, Indicators, and Connector Functions………………………....... 2-4 Fuse Cartridge……………………………………………………………………………. 2-6 Omni Antenna Limitations……………………………………………………………….. 2-7 TAP-141………………………………………………………………………………….. 2-8 Transponder Sequence of Tests…………………………………………………………... 2-10 T-48 MOD III Configuration Chart…………………………………...…………………..
Page 9: List Of Tables
Revision A T-48 90 008 026 List of Tables Table Title Page T-48 MOD 3 Accessories……………………………………………………………….. 2-2 Controls, Indicators and Connectors.…………………………………………………….. 2-3 Pulse Width and Spacing Criteria….……………………………………………………... 2-21...
Page 10: Introduction
T-48/T-48A MOD 3 Transponder Ramp Test Set Purpose and Function of the Equipment The T-48/T-48A MOD 3 Test Set (T/S), tests airborne ATCRBS MODE A & C and MODE S transponders. It is self-contained and battery operated, that requires no direct hardware connection to the equipment under test.
Page 11: Regulatory Responsibilities
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 to misuse, neglect, accident, incorrect wiring, not our own, improper installation, or to be used in violation of instructions furnished by...
Page 12: Safety Considerations
Revision A T-48 90 008 026 Safety Considerations The following are general safety precautions that are not related to a particular test or procedure. These are recommended procedures that all personnel must apply during many phases of operation and maintenance.
Page 13: Section B- Equipment Description
Revision A T-48 90 008 026 SECTION B EQUIPMENT DESCRIPTION Specifications Transmitter Frequencies 1030 MHz ± 0.1 MHz Output power -10 dBm Pulse amplitude on/off ratio greater than 60 dB Differential Phase Shift Keying (DPSK) accuracy 180 ± 22 degrees...
Page 14: Abbreviations, Acronyms And Glossary Of Terms
Revision A T-48 90 008 026 Abbreviations, Acronyms and Glossary of Terms Air to Air A/A B Air to Air Beacon ac or AC Alternating Current Analog to Digital Address The unique code to which a MODE S transponder replies. This is not to be confused with the 4096 code used for identifying ATCRBS transponders.
Page 15 ATCRBS/C, where the reply includes the aircraft pressure altitude. These same responses for military transponders are designated as MODE 3A and MODE 3C. The associated intruder type panel designations on the T-48 is “ATCRBS”. Radio Frequency Root Mean Square...
Page 16: Preparation For Use And Operation
This Chapter contains all the necessary information for the initial unpacking, inspection, and set-up of the T-48/T-48A MOD 3 Test Set. From this point forward, the T-48 MOD 3 Test Set will be known as the T- 48, Test Set, or T/S.
Page 17 Revision A T-48 90 008 026 T-48 & T-48A MOD 3 TEST SET P/N 90 000 026 MOD 3 NOMENCLATURE Case Universal 64030034 Cable Assembly, AC Line Cord 75010025 TAP-135 Antenna Coupler (10 ft.) 89000145 Direct Connect Coupler (TAP-141) 89000147...
Page 18: Section B- Operating Controls, Indicators, And Connectors
Test Set. Controls, Indicators, and Connectors Table 2-2 and Figure 2-2 describes and shows locations for each of the T-48 Test Set controls, indicators, and connectors. Control, Indicator or...
Page 19 Revision A T-48 90 008 026 ANTENNA TEST LIGHTS TEL-INSTRUMENT ELEC. CORP T-48 TYPE WATTS MODE S/ATCRBS PART NO. SERIAL NO. INTERROGATE TRANSPONDER RAMP INPUT 115/230 VAC 50-400HZ CAGE CODE 92606 USA TEST SET MOD 1 50-400 HZ, SINGLE PHASE 120/220 VAC, 25 WATTS 120 VAC- 0.25 FTT, 220 VAC-0.125 FTT...
Page 20: Section C- Operating Instructions
Battery Operation The T-48 is equipped with a rechargeable Ni-Cad battery capable of operating the Test Set using a 50% duty cycle for 8 hours at 77 degrees F (25 Degrees C). This represents a full day of typical testing on a single charge.
Page 21: Supplied Antennas
2.9.1 Omni-Directional Antenna The Omni-Directional antenna is stored inside the T-48 cover. This antenna’s primary task is to provide a quick-test capability for ATCRBS Mode A/C and Mode S equipment. The following suggestions will improve your overall test results when utilizing the Omni-Directional Antenna. Transponder RF power, receiver sensitivity, and frequency measurements are not displayed.
Page 22: Antenna Coupler (Tap-135)
The TAP-135 is interchangeable with The T-49C MOD 3 Test Set. 1. Remove the TAP-135 from the Test Set front cover, unwind the cable and connect the cable to the ANTENNA connector on the front panel of the T-48 Test Set.
Page 23 RF signal thus producing an accurate measurement. 2.9.3 Optional Direct Connect Coupler (TAP-141) The TAP-141 Direct Connect Coupler provides a means of connecting a transponder directly to the T-48 Test Set, thus providing an accurate means of checking transponder power, frequency, sensitivity, and diversity measurements.
Page 24: Direct Connect Coupler (Tap-141)
2.10 Initial Start-up Procedure When utilizing the T-48 Test Set, always begin with a fully charged battery or AC power connected. The following displays are shown without a transponder being tested. 1. Press the INTERROGATE or TEST button to activate the Test Set. The following display...
Page 25 Revision A T-48 90 008 026 TEL INSTRUMENT T-48 REV X. XX MODE S XPDR COM/AB MODE 3A/C XPDR XPDR TESTING . . . INTERROGATE TO TEST INTERROGATE TO TEST NO REPLY MODE 3A & SLS MODE 3A & SLS...
Page 26: Mode 3A/C Automatic Sequence Of Transponder Tests
When all tests are complete, with no failures, the T-48 test sequence will end with an alternating display of measured power, receiver sensitivity, and frequency. The second page displayed, shows power measured in watts.
Page 27: Mode 3A/C Manual Sequence Of Transponder Tests
To manually display each test performed by the Test Set, the operator must select and press the TEST switch. The T-48 will then run each test in order (Figure 2-6) but pause and display the results of each test. The operator must then depress the TEST button again to proceed to the next test in sequence.
Page 28: Mode S Automatic Sequence Of Transponder Tests
If an abnormal result occurs, the sequence will stop at that test and a “FAIL” message will be displayed. To override after a “FAIL” message, depress the INTERROGATE button to continue testing with the failure. First display shown once the T-48 has determined a Mode S equipped MODE S XPDR COM/AB transponder is being received.
Page 29 To commence the manual sequence, the operator must press the TEST button after the Test Set has verified a RF signal and the first test display is shown on the front panel of the Test Set. The T-48 has determined a Mode S equipped transponder is being received. To continue testing, the operator must depress the “TEST”...
Page 30 Revision A T-48 90 008 026 Test Complete. A DF=11 reply will display the decoded aircraft MODE 3A ALL CALL address in Hexadecimal (YXXXXX) and Receiver Efficiency is YXXXXX 100% REPLY displayed. TEST button pressed to advance to next test.
Page 31 Revision A T-48 90 008 026 Test Complete. A DF=5 Reply will display the aircraft 4096 code MODE S SURV FS: AIR (1234), Flight Status (AIR) and Receiver Efficiency. 1234 100% REPLY Possible Flight Status Codes are AIR (Airborne), GND (Ground), AL/AR NOTE (Alert/Airborne), AL/GND (Alert/Ground), AL/SP (Alert/SPI), and SPI.
Page 32 Revision A T-48 90 008 026 MODE S COMM A Altitude test initialized. The Test Set will transmit MODE S COMM ALTITUDE a COMM A/B, ABCD transmission utilizing the UF=4/RR:18 format. TESTING . . . This will test a transponders communication and data-link capabilities.
Page 33: Diversity
Revision A T-48 90 008 026 TEST button pressed to advance to next test. DIVERSITY Diversity test initialized. TESTING . . . Display indicates a “PASS” when the Test Set determines whether DIVERSITY leakage relative to the inactive antenna is less than -20 dB.
Page 34 (54dBm), receiver sensitivity (-75dBm) and transponder frequency (1090.0 MHz). The second page displays power in watts. POWER,RCVR & FREQ POWER,RCVR & FREQ 54dB-75dB 1090.0 MHz 250W-75dB 1090.0 MHz Appendix A contains a sample Transponder Test procedure utilizing the T-48 Test Set. 2-19...
Page 35 Test Set Receiver efficiency is less than 90%. The T-48 Test Set accurately measures each Framing Pulse, Pulse Width, and Pulse Spacing. Each Data Pulse received will also have the width and spacing measured. Both Mode S and ATCRBS transponders are tested during the Mode 3A and Mode C portion of the MANUAL test sequence only.
Page 36 Press the TEST button to initialize the manual sequence of tests. MODE 3A Test Initialized. Test Set also performs Framing Pulse Width and Data Pulse Tests. With 1234 entered, the T-48 will measure MODE 3A & SLS TESTING .

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T-48a