JOINT INTEROPERABILITY TEST COMMAND (JITC)

Transcription

1 UNCLASSIFIED JOINT INTEROPERABILITY TEST COMMAND (JITC) High Frequency Test Facility (HFTF) Activity Update UNCLASSIFIED Joseph Schulte HFTF Action Officer 17 January 2002

2 AGENDA JITC Mission Summary of 2001 HFTF Test Efforts 2001 JITC HFTF Certifications MIL-STD B/141B Issues Submitted to Center for Military Standards Future Planned Tests 100TH Anniversary Long-Haul HF Transmissions JITC POC/Web Page Information Questions/Comments

3 JITC MISSION To support the DoD s C4I goals by providing test, evaluation, assessment, and certification i services for the Joint Services, Commander-in-Chiefs (CINC s), Joint Task Forces (JTF s), Military Services, Agencies, allies, and private industry. To provide technical expertise to CINC s/services/agencies requests for assistance. DoD Directive , DoD Instruction , and Chairman Joint Chief of Staff (CJCS) Instruction B that outline the basic interoperability and standards conformance requirements and identifies the JITC as DISA s test center for certification of such requirements.

4 JITC MISSION INDIAN HEAD, MD CIVILIAN MILITARY CONTRACTOR TOTAL FORT HUACHUCA, AZ CIVILIAN MILITARY CONTRACTOR TOTAL

5 2001 HF TESTING SUMMARY STANDARDS CONFORMANCE & INTEROPERABILITY TESTS HF EQUIPMENT PROPONENT MIL-STD B MIL-STD B INTEROPERABILITY RF-5710A Modem Harris Corporation X AN/PRC-138(V)2 Harris HF Transceiver Corporation X AN/PRC-150(C) HF Transceiver Harris Corporation X X PM AN/ARC-220 HF Transceiver US Army AEC X X X RT-2200 HF Transceiver Rockwell Collins X Q9600 Modem Rockwell Collins X X

6 2001 HF TESTING SUMMARY GENERAL TEST SUPPORT SCOPE Command Modernization 1) Responsible Test Organization for Air Force 2) Supports Global HF Connectivity 3) 14 SCOPE Command Stations 4) Centralized control of Remote Sites from Andrews AFB

7 2001 HF TESTING SUMMARY SCOPE COMMAND WORLDWIDE LOCATIONS Elmendorf Offutt West Coast Hawaii Iceland Andrews Puerto Rico Lajes Croughton Sigonella Yokota Guam Ascension Diego Garcia

8 2001 HF TESTING SUMMARY GENERAL TEST SUPPORT (continued) Test Technology Development & Demonstration 1) JITC SCOPE Command Installation 2) DEMONSTRATIONS a) HF Demonstrations ti (NMSU, FEMA, Rockwell, Civil Air Patrol) b) High Speed Modems (above 2400 bps) c) 3 rd Generation ALE, which was not available prior to completion of project on 31 December 2001

9 2001 HF TESTING SUMMARY TTD&D JITC Radio Facility Demonstration Systems Modem PC Mail Server JITC SCOPE Command 3-Level Station with TX & RX HF Radios (New Mexico State University) Radio Modem PC (Civil Air Patrol) Radio Modem PC (FEMA) Radio Modem PC IP Router (Rockwell Collins, IA) Radio Modem PC Internet Control and Terminal System PC

10 2001 JITC CERTIFICATIONS STANDARDS CONFORMANCE & INTEROPERABILITY CERTIFICATIONS HF EQUIPMENT MIL-STD B MIL-STD B INTEROPERABILITY RF-5710A Modem X AN/PRC-138(V)2 HF Transceiver Assessment AN/PRC-150(C) HF Transceiver In-Progress In-Progress AN/ARC-220 HF Transceiver* In-Progress In-Progress Test Report (only) RT-2200 HF Transceiver X Q9600 Modem X Test Report (only) * The AN/ARC-220 is also in-process of being MIL-STD A tested.

11 MIL-STD B/141B 110B/141B ISSUES ISSUE #1: Does not appear consideration has been given in MIL-STD B for Performance Requirements of Modems embedded within HF radios. Typical Modem Performance Test Configuration BERT MODEM Baseband HF Simulator MODEM BERT Performance Test Configuration for embedded Modem within HF Radio BERT MODEM Baseband HF Simulator HF-80 Radio RF Path Radio Embedded MODEM Under Test BERT

12 MIL-STD B/141B 110B/141B ISSUES ISSUE #1(continued): Data from manufacturers and at JITC indicates that the added noise from the up/down frequency conversion is between 0.5 to 2 db, depending on the radio IF BW characteristics ti and phase noise. BER Performance of Modem-to- Modem versus Modem/Radio(HF-80) to Radio(HF-80)/Modem at 9600 bps BER Performance of Modem-to- Modem versus Modem/Radio(HF-80) to Radio(HF-80)/Modem at 4800 bps BER 1.00E E E E E E E Modem/Radio Modem BER 1.00E E E E E E Modem/Radio Modem SNR SNR (db)

13 MIL-STD B/141B 110B/141B ISSUES ISSUE #2: 39-Tone Performance Requirements have NEVER been fully met by any Manufacturer of HF Modems. Most difficult requirements at 2400 bps data Rate. Sample Data from 39-Tone Performance Tests 2400 BER Modem #1 Modem #2 Modem #3 SNR (db) Requirement Data Data Data E-02 No Sync No Sync No Sync E E E E E E E E E E E E E E E E-05

14 MIL-STD B/141B 110B/141B ISSUES ISSUE #3: The required data rates for an HF Modem to comply with MIL-STD B are somewhat ambiguous; a. Table 1 in paragraph p 4.1 indicates and HF Modem (3kHz Channel) should operate at data rates bps (PSK) and 150 bps (FSK). b. Paragraph 4.2 states all data modems shall comply with applicable requirements of paragraphs through c. Paragraph indicates all data Modems shall operate at signaling and modulation rates 50 and multiples of 75 up to 9600 bps.

15 MIL-STD B/141B 110B/141B ISSUES ISSUE #4: Inparagraph ofMIL-STD B where the PREAMBLE SEQUENCE (0,1,3,0,1,3,1,2,0,D1, D2, C1,C2,C3,0) is discussed, there is no automatic feature for selecting 0.0 second (no interleaver) mode of operation - only short and long interleaver modes. Table XV. (MIL-STD B) Bit Rate (bps) Short Interleaver D1 D2 Long Interleaver D1 D (Secure Voice) (Data) No Interleaver D1 D2?? ??

16 MIL-STD B/141B 110B/141B ISSUES ISSUE #5: Paragraph h42625i in MILSTD MIL-STD B 110B incorrectly states that clock period shall have a 60% duty cycle. The duty cycle should be 50%. ISSUE #6: Phase Noise requirement for fixed site and dtransportable t long-haul l radio transmitters in MIL- STD B of -155 dbc/hz for frequencies more than ±5% of carrier frequency (F o ) is an extreme requirement that needs to be carefully reviewed.

17 MIL-STD B/141B 110B/141B ISSUES MIL-STD B Fixed Site Phase Noise Req ts dbc/hz Cosited Cosited F o -5% -100 khz -100 Hz F +100 Hz +100 khz F o + 5% o Frequency

18 MIL-STD B/141B 110B/141B ISSUES ISSUE #6(continued): Two test measurement configurations can be used to measure phase noise. Test Configuration for phase noise -140 dbc/hz Radio Under Test Reference Signal Generator Attenuation RF Output (in quadrature) Control Voltage Agilent 70420A Phase Comparator Filter AMP HPIB Baseband Analysis Hardware Personal Computer HPIB

19 MIL-STD B/141B 110B/141B ISSUES ISSUE #6 (continued): TEST CONFIGURATION for PHASE NOISE -140 dbc/hz: ADVANTAGES: a. Automated system for measurement. b. Repeatability. c. Frequency Offsets easily measured across full HF Band. DISADVANTAGES: a. Cost (>$80k). b. Measurement limited by phase noise of Reference Signal Generator (normally more than -140dBc/Hz.

20 MIL-STD B/141B 110B/141B ISSUES ISSUE 6# (continued): Test Configuration for phase noise -140 dbc Power Splitter Phase Shifter(+/- 180 ) RF quadrature Agilent 70420A Phase Comparator Filter AMP Control Lines Personal Computer Delay Line ( ) yields d ( ns) Baseband Analysis Hardware Min. output +19dBm Calibration Source Radio Under Test Measurement range restricted to less than 1/(2 d ), i.e., d = 100ns, maximum offset frequency measurement range is 5 MHz without sin(x)/x response compensation.

21 MIL-STD B/141B 110B/141B ISSUES ISSUE #6(continued): TEST CONFIGURATION for PHASE NOISE -140 dbc/hz: ADVANTAGES: a. Measurement capability to -170 dbc/hz approx. b. No Reference Signal Generator required. DISADVANTAGES: a. Cost (>$60k) (Phase shifter required in lieu of Reference Signal Generator). b. Manual tuning required to obtain quadrature signal. c. Measurement range limited to 1/(2* d ) at a single test frequency, which could prevent a continuous plot of phase noise across HF band at the test frequency.

22 MIL-STD B/141B 110B/141B ISSUES ISSUE #6 (continued): 1) Is -155 dbc/hz reasonable phase noise requirement? 2) What are reasonable phase noise criteria that are beneficial to user and not unreasonable to manufacturer?

23 UPCOMING MIL-STD B/141B 110B/141B TESTS FY02 Planned MIL-STD Tests HF EQUIPMENT PROPONENT MIL-STD B MIL-STD B RT-2200 HF Transceiver Rockwell Collins X X MICOM 2R HF Transceiver Motorola/Mobat/ Tadiran X VRC-6100 HF Talla-Com Transceiver Industries X RT-7000 HF Transceiver Datron World Communications X X

24 Additional FY02 Test Support - SCOPE Command a. RTO Support b. STANAG 5066 Test Procedures? - JTRS Test Procedure Development a. MIL-STD B update. b. MIL-STD B update. c. MIL-STD A update. d. STANAG 4529 write. e. STANAG 4539 write.

25 100 th Anniversary of 1 st Trans-Atlantic Communication On 12 December 1901, Mr. Guglielmo Marconi, was first to demonstrate long-haul HF communications. Mr. Marconi successfully received the first over-the-air Trans-Atlantic Communication (letter S ), using a radio receiver made of only 12 components and a kite for an antenna. The transmitter (a spark gap type) was located in Cornwall, England, which was approximately 3500 km from Mr. Marconi s location on the coast of New Foundland.

26 JITC POC/Web Page Information Mr. Joe Schulte (520) Mr. Robin Moore GLOBAL ALE Network Callsigns: JTF, JTA, and JTC JITC s Homepage with link to HFTF web page. (520) moorer@fhu.disa.mil JITC HOTLINE JITC HF Test Facility LET-JITC (520) hotline@fhu.disa.mil DSN

27 QUESTIONS Questions/ Comments