Test report rev1.0

Transcription

1 Test report rev1.0 based on: ACP/WGB17/WP (Clauses B.1.2.2, B and B only) Frequency testing of VDL Mode 4 for the development of frequency planning criteria, October 2004, Version 1.4 VDL mode-4 Radio Communication Equipment Rockwell Collins VHF-2120

2 Report number: Contents MAIN MODULE INTRODUCTION PRODUCT TEST SCHEDULE OBSERVATIONS AND COMMENTS SUMMARY CONCLUSIONS...9 TEST RESULTS MODULE SQUELCH BREAK TEST (B.1.2.2) Test set up Squelch break test...11 Squelch break test (cont d) Squelch break test (cont d) SIGNAL TO PULSE (S/P) TEST (B.1.2.6) Test set up Signal to pulse (S/P) test Signal to pulse (S/P) test (cont d) Signal to pulse (S/P) test (cont d) BER TEST (DSB-AM INTERFERER TO VDL MODE 4 LINK) (B.1.3.2) Test set up BER test BER test (cont d) BER test (cont d) BER TEST (VDL MODE 4 INTERFERER TO VDL MODE 2 LINK) (B.1.3.2) Test setup...28 BER test BER TEST (VDL MODE 2 INTERFERER TO VDL MODE 4 LINK) (B.1.3.2) Test setup BER test BER TEST (VDL MODE 4 INTERFERER TO VDL MODE 4 LINK) (B.1.3.2) Test setup (RC VHF-2120 interferer to CNS VDL-4000 victim) Test setup (CNS VDL-4000 interferer to RC VHF-2120) BER test BER test (cont d)...38 USED TEST EQUIPMENT MODULE...40 PHOTOGRAPHS MODULE...41 REVISION HISTORY...56 This report comprises of five modules. The total number of pages is: 56

3 Page: 3 of 56 Main module Report number: Main module 1 Introduction This report contains the result of tests performed by: Telefication B.V. Edisonstraat 12a 6902 PK Zevenaar The Netherlands Telefication complies with the accreditation criteria for test laboratories as laid down in ISO/IEC 17025:2005. The accreditation covers the quality system of the laboratory as well as the specific activities as described in the authorized annex bearing the accreditation number L021 and is granted on 30 November 1990 by the Dutch Council For Accreditation (RvA: Raad voor Accreditatie). The copyright of this test report is owned by Telefication bv and may not be reproduced except in full without the written approval of Telefication B.V. Ordering party: Company name : Luftfartsverket Address : Vikboplan 11 Zipcode : SE City/town : Norrköping Country : Sweden Date of order : 13 March 2008

4 Page: 4 of 56 Main module Report number: Product A sample of the following product was submitted for testing: Product category : VDL mode-4 Radio Communication Equipment Manufacturer : Rockwell Collins USA Trade mark : Rockwell Collins Type designation : VHF-2120 Hardware version : Test model Software version : Test model Serial number : 277RF 3 Test schedule Tests are carried out in accordance with the specification detailed in chapter 5 "Summary" of this report. Tests were carried out at the following location: Rockwell-Collins France 6, avenue Didier Daurat Blagnac Cedex France Tests are carried out between the following dates: 14 January and 18 March 2008

5 Page: 5 of 56 Main module Report number: Observations and comments This report contains the results of tests of four different interferer to communication link configurations. 1. DSB-AM interferer to VDL mode 4 link.. Find below the information recorded for the labelling of each of the DSB -AM radio's radio which were used: Becker COMM 3200 system Serial number : LAB No. : /76 FTZ No : LB TSO : C37c, C38c RTCA : DO 156 CL.C RTCA : DO 157 CL.4 RTCA : DO 160A FCC ID : 8548RSAR3201 ED14A Rockwell Collins VHF-700A PRN : Serial number : TSO : C37b, C38b FCC ID : AJK9URPN DO-160-A : A2D2/JY Rockwell Collins VHF-2100E PRN : Serial number : 29PWD TSO : C128, C169 ETSO : 2C37e, 2C38e, 2C128 DO-160C : ENV CAT DO-178B : Level C/D 2. VDL mode 4 interferer to VDL mode 4 link This test was carried out by using two CNS Systems VDL4000 transceivers, one as the generator of the wanted signal and the other as the victim. The RC VHF-2120 was used to create the interferer.

6 Page: 6 of 56 Main module Report number: Find below the information recorded for the labelling of each of the CNS Systems VDL4000 radio's radio which were used: CNS Systems VDL4000 Serial number : 1025 PN : Software : SW This radio was used to send the wanted VDL4 signal. CNS Systems VDL4000 Serial number : 1047 PN : Software : SW This radio was used as the victim. The test was also carried out, by using a CNS VDL4000 radio as the interferer and the RC VHF as the victim. The communication link with the victim was established by a vector signal generator, type Agilent E4438C. RC VHF-2120 (victim) Serial number : 277RF PN : VDL mode 4 interferer to VDL mode 2 link This test was carried out, by using a VDL2 test bench containing a VHF-920 and a VHF-2100E transceiver, the first as the generator of the wanted signal and the second as the victim. The RC VHF-2120 was used to create the interferer. Rockwell Collins VHF-2100E (victim) PRN : Serial number : 29PWD TSO : C128, C169 ETSO : 2C37e, 2C38e, 2C128 DO-160C : ENV CAT DO-178B : Level C/D

7 Page: 7 of 56 Main module Report number: VDL mode 2 interferer to VDL mode 4 link This test was done, by using a RC VHF-2120 as an interferer and a RC VHF-2120 as a victim. The communication link with the victim was established by a vector signal generator, type Agilent E4438C. RC VHF-2120 (victim) Serial number : 277RF PN :

8 Page: 8 of 56 Main module Report number: Summary The product is intended for use in the following application area: AIRBORNE DIGITAL COMMUNICATION EQUIPMENT The sample is tested according to the following specification: ACP/WGB17/WP (Clauses B.1.2.2, B and B only) Frequency testing of VDL Mode 4 for the development of frequency planning criteria, October 2004, Version 1.4

9 Page: 9 of 56 Main module Report number: Conclusions The results of the test as stated in this report are exclusively applicable to the product item as identified in this report. Telefication bv does not accept any responsibility for the results stated in this report, with respect to the properties of product items not involved in these tests. All tests are performed by: name function : H.H. Lodewijk : Test Engineer Radio/EMC signature : Review of test methods and report by: name function : P.A. Suringa : Senior Engineer Radio/EMC signature : The above conclusions have been verified by the following signatory: date : 9 April 2008 name function : J.P. van de Poll : Co-ordinator Test Group signature :

10 Page: 10 of 56 Test results module 1 Squelch break test (B.1.2.2) 1.1 Test set up DUT VDL4 Tx Signal generator DSB-AM 1kHz, 30% Pwr attn Pwr attn + DSB-AM Rx Oscilloscope

11 Page: 11 of Squelch break test Measurement reference : Clause B Interferer : Rockwell Collins VHF-2120 Victim : Becker COMM 3200 Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Result: Channel offset (N) db rel. to squelch open level 119 MHz 128 MHz 136 MHz -40 > 85 > 85 > > 85 > 85 > > 85 > 85 > 85-5 > 85 > 85 > 85-4 > 85 > 85 > 85-3 > 85 > 85 > 85-2 > 85 > 85 > (note 1) 0 (note 2) 0 (note 3) > 85 > 85 > > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > 85 note 1: corresponds to -92 dbm note 2: corresponds to -94 dbm note 3: corresponds to -96 dbm Channel offset: N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 2, 4, 5, 6, 13, 14, 16 (The numbers listed refer to the module 'Used test equipment module'.)

12 Page: 12 of Squelch break test (cont d) Measurement reference : clause B Interferer : Rockwell Collins VHF-2120 Victim : Rockwell Collins VHF-700A Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Result: Channel offset (N) db rel. to squelch open level 119 MHz 128 MHz 136 MHz -40 > 85 > 85 > > 85 > 85 > > 85 > 85 > 85-5 > 85 > 85 > 85-4 > 85 > 85 > 85-3 > 85 > 85 > 85-2 > 85 > 85 > 85-1 > 85 > 85 > (note) 0 (note) 0 (note) +1 > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > 85 note: corresponds to -107 dbm Channel offset: N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 2, 4, 5, 6, 13, 14, 16 (The numbers listed refer to the module 'Used test equipment module'.)

13 Page: 13 of Squelch break test (cont d) Measurement reference : clause B Interferer : Rockwell Collins VHF-2120 Victim : Rockwell Collins VHF-2100E Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Result: Channel offset (N) db rel. to squelch open level 119 MHz 127 MHz 136 MHz -40 > 85 > 85 > > 85 > 85 > > 85 > 85 > 85-5 > 85 > 85 > 85-4 > 85 > 85 > 85-3 > 85 > 85 > 85-2 > 85 > 85 > 85-1 > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > > 85 > 85 > 85 Channel offset: N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 2, 4, 5, 6, 13, 14, 16 (The numbers listed refer to the module 'Used test equipment module'.)

14 Page: 14 of 56 2 Signal to pulse (S/P) test (B.1.2.6) 2.1 Test set up DUT VDL4 Tx Signal generator DSB-AM 1kHz, 30% Pwr attn Pwr attn + DSB-AM Rx Oscilloscope

15 Page: 15 of Signal to pulse (S/P) test Measurement reference : clause B Interferer : Rockwell Collins VHF-2120 Victim : Becker COMM 3200 Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Wanted signal level : -82 input DSB-AM receiver under test Result: Channel offset (N) Becker COMM MHz 128 MHz 136 MHz Channel offset: N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 2, 4, 5, 6, 13, 14, 16 (The numbers listed refer to the module 'Used test equipment module'.)

16 Page: 16 of 56 VDL4 interferer to COMM [db] MHz 128MHz 136MHz Channel no

17 Page: 17 of Signal to pulse (S/P) test (cont d) Measurement reference : clause B Interferer : Rockwell Collins VHF-2120 Victim : Rockwell Collins VHF-700A Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Wanted signal level : -82 input DSB-AM receiver under test Result: Channel offset (N) Rockwell Collins VHF-700A 119 MHz 128 MHz 136 MHz Channel offset: N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 2, 4, 5, 6, 13, 14, 16 (The numbers listed refer to the module 'Used test equipment module'.)

18 Page: 18 of 56 VDL4 interferer to RC-700A [db] MHz 128MHz 136MHz Channel no

19 Page: 19 of Signal to pulse (S/P) test (cont d) Measurement reference : clause B Interferer : Rockwell Collins VHF-2120 Victim ; Rockwell Collins VHF-2100E Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Wanted signal level : -82 input DSB-AM receiver under test Result: Channel offset (N) Rockwell Collins VHF-2100E 119 MHz 128 MHz 136 MHz Channel offset: N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 2, 4, 5, 6, 13, 14, 16 (The numbers listed refer to the module 'Used test equipment module'.)

20 Page: 20 of 56 VDL4 interferer to VHF-2100E [db] MHz 128MHz 136MHz Channel no

21 Page: 21 of 56 3 BER test (DSB-AM interferer to VDL mode 4 link) (B.1.3.2) 3.1 Test set up DSB-AM E4438C inter Vector signal generator DSB-AM Tx Pwr attn Pwr attn + DUT VDL4 Rx

22 Page: 22 of BER test Measurement reference : clause B Interferer : Becker COMM 3200 Victim : Rockwell Collins VHF-2120 Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Wanted signal level : -82 input VDL4 receiver under test Result: db rel. (@ BER* ) 1%) to wanted signal of - 82 dbm Channel offset (N) 119 MHz 128 MHz 136 MHz * * ) Over bits Channel offset : N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17. (The numbers listed refer to the module 'Used test equipment module'.)

23 Page: 23 of 56 COMM 3200 interferer to VDL [db] MHz 128MHz 136MHz Channel no

24 Page: 24 of BER test (cont d) Measurement reference : clause B Interferer : Rockwell Collins VHF-700A Victim : Rockwell Collins VHF-2120 Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Wanted signal level : -82 input VDL4 receiver under test Result: Channel offset (N) db rel. to wanted signal of - 82 dbm 119 MHz 128 MHz 136 MHz Channel offset : N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15. (The numbers listed refer to the module 'Used test equipment module'.)

25 Page: 25 of 56 VHF-700A interferer to VDL [db] MHz 128MHz 136MHz Channel no

26 Page: 26 of BER test (cont d) Measurement reference : clause B Interferer : Rockwell Collins VHF-2100E Victim : Rockwell Collins VHF-2120 Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Wanted signal level : -82 input VDL4 receiver under test Result: db rel. to wanted signal of - 82 dbm Channel offset (N) 119 MHz 128 MHz 136 MHz Channel offset : N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15. (The numbers listed refer to the module 'Used test equipment module'.)

27 Page: 27 of 56 VHF-2100E interferer to VDL [db] MHz 128MHz 136MHz Channel no

28 Page: 28 of 56 4 BER test (VDL mode 4 interferer to VDL mode 2 link) (B.1.3.2) 4.1 Test setup

29 Page: 29 of BER test Measurement reference : clause B Interferer : Rockwell Collins VHF-2120 Victim : Rockwell Collins VHF-2100E Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Wanted signal level : -82 input VDL2 receiver under test Result: db rel. to wanted signal of - 82 dbm Channel offset (N) 119 MHz 128 MHz 136 MHz Channel offset : N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 3, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16, 18. (The numbers listed refer to the module 'Used test equipment module'.)

30 Page: 30 of 56 VHF-2120 interferer to VDL [db] MHz 128MHz 136MHz Channel no

31 Page: 31 of 56 5 BER test (VDL mode 2 interferer to VDL mode 4 link) (B.1.3.2) 5.1 Test setup

32 Page: 32 of BER test Measurement reference : clause B Interferer : Rockwell Collins VHF-2120 Victim : Rockwell Collins VHF-2120 Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Wanted signal level : -82 input VDL4 receiver under test Channel loading : 75 msec burst per second Result: db rel. (@ BER* ) 1%) to wanted signal of - 82 dbm Channel offset (N) 119 MHz 128 MHz 136 MHz * ) Over bits Channel offset : N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 3, 5, 6, 13, 14, 16 (The numbers listed refer to the module 'Used test equipment module'.)

33 Page: 33 of 56 RC VHF-2120 interferer to RC VHF [db] MHz 128MHz 136MHz Channel no

34 Page: 34 of 56 6 BER test (VDL mode 4 interferer to VDL mode 4 link) (B.1.3.2) 6.1 Test setup (RC VHF-2120 interferer to CNS VDL-4000 victim)

35 Page: 35 of Test setup (CNS VDL-4000 interferer to RC VHF-2120)

36 Page: 36 of BER test Measurement reference : clause B Interferer : Rockwell Collins VHF-2120 Victim : CNS systems VDL4000 Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Wanted signal level : -82 input VDL4 receiver under test Result: db rel. to wanted signal of - 82 dbm Channel offset (N) 119 MHz 128 MHz 136 MHz * ) Over bits Channel offset : N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 3, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16 (The numbers listed refer to the module 'Used test equipment module'.)

37 Page: 37 of 56 VHF-2120 interferer to VDL [db] MHz 128MHz 136MHz Channel no

38 Page: 38 of BER test (cont d) Measurement reference : clause B Interferer : CNS systems VDL4000 Victim : Rockwell Collins VHF-2120 Atmospheric pressure : between 86 kpa and 106 kpa Temperature : 24 C Relative humidity : 46% Wanted signal level : -82 input VDL4 receiver under test Channel loading : 13 msec burst per second (1 slot) Result: db rel. (@ BER* ) 1%) to wanted signal of - 82 dbm Channel offset (N) 119 MHz 128 MHz 136 MHz Channel offset: N * 25 khz, at 136 MHz the +40 channel was tested at +39 ( MHz) Measurement uncertainty : +/- 1.6 db The reported uncertainty is based on a standard uncertainty multiplied by a coverage factor of k=1.96 providing a level of confidence of 95%, but excluding the effect of measurement system repeatability. Measurement equipment : 1, 3, 5, 6, 13, 14, 16 (The numbers listed refer to the module 'Used test equipment module'.)

39 Page: 39 of 56 CNS VDL-4000 interferer to RC VHF [db] MHz 128MHz 136MHz Channel no

40 Page: 40 of 56 Used test equipment module Report number: Used test equipment module Item Description Manufacturer Model ID 1 Spectrum analyser Hewlett Packard HP Digital Oscilloscope LeCroy LC334A Communication Service monitor Rhode & Schwarz CMS Vector signal generator Agilent E4438C SN = US DC Power supply Insek SPS RF attenuator 30 db / 25 watt 0-4 GHz Radial R No-01 7 RF attenuator 30 db / 25 watt 0-4 GHz 8 RF attenuator 30 db / 25 watt 0-4 GHz 9 RF attenuator 30 db / 25 watt 0-4 GHz 10 RF attenuator 30 db / 25 watt 0-1 GHz 11 RF attenuator 10 db / 25 watt 0-1 GHz 12 RF attenuator 10 db / 25 watt 0-1 GHz 13 Step attenuator 0-10 db 14 Step attenuator 0-70 db 15 Step attenuator 0-12 db Radial R No-02 Radial R No-03 Radial R No-04 Radial R No-05 Radial R No-06 Radial R No-07 ALAN 50V10-N ALAN 50V70-N Hewlett Packard 355C RF power splitter Mini circuits ZA2CS W-N 17 Power Attenuator 10W, 6 db, 50 Ω 18 VDL mode 2 test bench bench 4502 Radial R TE00486 Rockwell -Collins France -- --

41 Page: 41 of 56 Photographs module Report number: Photographs module Photograph 1: Rockwell-Collins VHF-2120, enclosure...42 Photograph 2: Rockwell-Collins VHF-2120, front...43 Photograph 3: Rockwell-Collins VHF-2120, label (top)...44 Photograph 4: Rockwell-Collins VHF-2120, label with serial number...45 Photograph 5: Rockwell-Collins VHF-920, front...46 Photograph 6: Rockwell-Collins VHF-920, label...47 Photograph 7: Rockwell-Collins VHF-700A, front...48 Photograph 8: Rockwell-Collins VHF-700A, label...49 Photograph 9: Becker COMM 3200, control unit...50 Photograph 10: Becker COMM 3200,...51 Photograph 11: CNS Systems, VDL 4000 (1), enclosure...52 Photograph 12: CNS Systems, VDL 4000 (1), label...53 Photograph 13: CNS Systems, VDL 4000 (2), enclosure...54 Photograph 14: CNS Systems, VDL 4000 (2), enclosure...55

42 Page: 42 of 56 Photographs module Report number: Photograph 1: Rockwell-Collins VHF-2120, enclosure

43 Page: 43 of 56 Photographs module Report number: Photograph 2: Rockwell-Collins VHF-2120, front

44 Page: 44 of 56 Photographs module Report number: Photograph 3: Rockwell-Collins VHF-2120, label (top)

45 Page: 45 of 56 Photographs module Report number: Photograph 4: Rockwell-Collins VHF-2120, label with serial number

46 Page: 46 of 56 Photographs module Report number: Photograph 5: Rockwell-Collins VHF-920, front

47 Page: 47 of 56 Photographs module Report number: Photograph 6: Rockwell-Collins VHF-920, label

48 Page: 48 of 56 Photographs module Report number: Photograph 7: Rockwell-Collins VHF-700A, front

49 Page: 49 of 56 Photographs module Report number: Photograph 8: Rockwell-Collins VHF-700A, label

50 Page: 50 of 56 Photographs module Report number: Photograph 9: Becker COMM 3200, control unit

51 Page: 51 of 56 Photographs module Report number: Photograph 10: Becker COMM 3200,

52 Page: 52 of 56 Photographs module Report number: Photograph 11: CNS Systems, VDL 4000 (1), enclosure

53 Page: 53 of 56 Photographs module Report number: Photograph 12: CNS Systems, VDL 4000 (1), label

54 Page: 54 of 56 Photographs module Report number: Photograph 13: CNS Systems, VDL 4000 (2), enclosure

55 Page: 55 of 56 Photographs module Report number: Photograph 14: CNS Systems, VDL 4000 (2), enclosure

56 Page: 56 of 56 Revision history Report number: Revision history REVISION DATE REMARKS Results of VDL mode 2 interferer to VDL mode 4 link added. Results of VDL mode 4 interferer to VDL mode 4 link extended.