Verification Test Plan

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1 (Note: the configuration data provided in this test plan is subject to change.) Antenna Verification Testing and scheduling Tel: Cell phone: Fax: Antenna Diameter (meters) Latitude (deg) North Refer to: Max EIRP Capability (dw) SSOG 200, SSOG 210 Nominal TX Gain (di) Longitude (E) (deg) East 15 MAY 2001, REV 5 Nominal 3 d eamwidth (deg) Earth Station Support Azimuth Step Size (deg) Registration Elevation Step Size (deg) Fax: AZ angle to test satellite (deg) EL angle to test satellite (deg) Page 1 of 6 Test Information Tests to be Performed Test Dates 01 Mar 2001 Contact Name Gain Over Temperature Time(UTC) 12: Earth Station Name TX Isolation Contour Satellite deg Earth Station Under Test (EUT) TX Antenna Patterns/Gain Cuts Telephone Tracking and EIRP Stability FAX Transmit Gain (Carrier match) Refer to <RXUVFKHGXOHGWHVW HPA Stability (This test is not mandatory but recommended.) WLPHGDWHDQGWKH VSDFHFUDIWWKDWZLOO EHXVHGIRUWKHWHVW Antenna Information 6WHSVL]HLQIRUPDWLRQ XVHGIRUWKHLVRODWLRQ FRQWRXUWHVW 7KHWHVWVWKDW\RX DUHUHTXLUHGWR SHUIRUPDUHOLVWHG KHUH Available Spacecraft eacons Ku-and C and RHCP RHCP LINEAR APR RHCP RHCP (Horizontal) LINEAR LINEAR (Vertical) LINEAR LINEAR APR-1 (Vertical) NOTE: 3950 MHz beacon on the IS E satellite is phased at 45

2 Test Configuration Information RX Tests YHULILFDWLRQ Configuration WHVWV 1 Configuration 2 On request and CSM resources U/L D/L U/L D/L permitting, AVT can provide a test Frequency (MHz) Frequency (MHz) carrier during EUT test time for non Transponder Transponder mandatory receive tests. eam GLO/A GLO/A eam GLO/ GLO/ Polarization LHCP RHCP Polarization RHCP LHCP S/C Isolation (d) S/C Isolation (d) Transmit Gain Note: Transmit gain by carrier match method depends in part on the accuracy of the measurement of EUT feed flange power. This method will only be used when 7KLVFROXPQSURYLGHVJHQHUDO LQIRUPDWLRQUHOHYDQWWRDQWHQQD Transmit Gain EUT has no antenna drive mechanism. Transmit gain is normally measured as part of pattern cuts using pattern integration. If the EUT does not have a motor drive antenna then carrier match transmit gain will have to be performed. Page 2 of 6 7KHIUHTXHQF\EHDPFRYHUDJH DQGSRODUL]DWLRQWKDWZLOOEH XVHGIRU\RXUYHULILFDWLRQWHVW EIRP/Tracking Stability Note: EIRP/Tracking stability is mandatory for all antennas with tracking capability. It is not mandatory for EUT s without tracking capability. It is recommended that these EUT s monitor the HPA output into dummy load or to clear sky for a period of twelve hours. HPA output can be measured by a Strip chart recorder or manually recording the level at an interval of every 15 minutes. EUT will transmit a test carrier. AVT will benchmark the carrier downlink. AVT will then transmit a test carrier at the same level as the EUT. Refer to the SSOG 210 for details. EIRP/Tracking Stability Test To measure the EIRP and tracking stability of the EUT over a period of twelve hours. AVT will record the downlink EIRP and frequency of the EUT test carrier and associated beacon for a period of twelve hours. EUT will record weather conditions during the test and report any change in conditions which could adversely effect the test.

3 Page 3 of 6 G/T Procedure Direct Spectrum Analyzer STEP 1: Manually peak antenna Azimuth and Elevation axis on beam center of S/C beacon or carrier signal. The preferred more accurate me thod for G/T measurement is using a carrier versus a satellite beacon. In both cases the downlink EIRP must be measured by AVT. STEP 2: The polarization angle should be optimized if the feed is linearly polarized. STEP 3: Set Spectrum Analyzer parameters as follows Resolution bandwidth 1 khz Video andwidth 100 Hz Span 50 khz Amplitude/division 10 d Reference level - convenient value, for example -30 to 50dbm depending on the level of the carrier or beacon being measured. Adjust signal level towards the top gradicule of the screen. STEP 4: Do not change the above settings on the spectrum analyzer. Select Marker/Noise On (dm/hz). Record the level and plot the display again. Remove signal (cable) from the input to the spectrum analyzer and verify the noise floor of the instrument is less than sky noise by a margin of at least 8-10d. STEP 5: Select Marker normal (dm) and then Peak Search. Record the level. Plot or print the spectrum analyzer display. A digital photographic image of the screen is also acceptable. Digital photographs can be sent as a bitmap/ JPEG via to avt@intelsat.int STEP 6: Remove the uplink carrier if being radiated by AVT or antenna under test. Point antenna off the satellite at least 10 degrees to quiet (cold) sky in azimuth CW or CCW direction. STEP 7: Fax and /or the 3 plots made in steps 4,5,6 [(C+N), sky noise and spectrum analyzer noise floor plots] to AVT at (202) AVT staff will immediately perform calculation of G/T. Please annotate plots as to polarization, sky-noise and instrument noise floor.

4 Receive G/T Note 1: If measuring G/T by spectrum analyzer direct method using a spacecraft beacon, the beacon downlink EIRP must be measured by AVT at the time of G/T measurement. Verification Test Plan Page 4 of 6 Receive System Figure of Merit (G/T) (Direct Spectrum Analyzer.) This form must be completed and faxed to AVT ( ) following G/T measurement. To measure the ratio of receive gain of the earth station antenna to the total noise temperature of the earth station receive system. Using satellite or celestial source the EUT will acquire the test signal. Using a spectrum analyzer the EUT will record the peak of the test signal. EUT will then point off the source and measure the noise. Note 2: Standard A and C Test Time (UTC) antennas require that G/T be Test Date: measured using radio star method. Intelsat Earth Station Code: For other standard antenna G/T is Spectrum analyzer manufacturer: measured by spectrum analyzer Spectrum analyzer model number: direct method using either EUT longitude (see note 4) spacecraft beacon or an EUT latitude (see note 4) unmodulated test carrier radiated by AVT.,IWKHGLUHFWVSHFWUXP DQDO\]HUPHWKRGLVXVHG IRU*7WKHGDWDPXVW EHUHFRUGHGRQWKLVIRUP DQGID[HGWR$97DORQJ ZLWKWKHVSHFWUXP DQDO\]HUSORWV Note 3: Please fax carrier LHCP or Horizontal RHCP or Vertical and noise level plots with the Intelsat Spacecraft G/T information if available. Satellite Location (deg E) Test Frequency Note 4: If transportable, please Earth Station elevation angle (deg) provide the geographic coordinates of the EUT where Non-direct Reading Specan measurement was made. Carrier + Noise level (dm) Sky Noise level (dm or dm/hz) Note 5: Spectrum analyzer noise Spectrum analyzer noise floor (dm or dm/hz) floor reading should be measured Resolution andwidth with no input to instrument (cable Correction Factor (eg 0.75 or 1.2) removed) Spec is 8-10d below noise level measured with antenna pointed Direct Reading Spectrum Analyzer off spacecraft to quiet sky. C/No measured (d/hz)

5 Isolation Contour Test Page 5 of 6 Common Problems: 1. Isolation contour is not centered at position 1. EUT antenna must be accurately peaked at beam center before commencing the isolation contour. 2. Non compliant isolation results. The purpose of the Isolation Contour Test is to measure the crosspol performance of the EUT at the 0.5d and 1 d beamwidths of the antenna. The EUT will radiate an unmodulated carrier to the assigned spacecraft at sufficient level to provide the nominal downlink EIRP as provided by the test plan. The nominal downlink will typically be 15 dw for C and, and 25 dw for Ku-band. From Position 1 (beam center), the EUT will follow the offsets indicated below. AVT will measure copol and xpol downlink E.I.R.P. at each position in order to determine the transmit isolation. Ensure that shorting plates on any Un-used ports are removed and the port is correctly terminated. Position 5 Position 4 Position 3 All waveguide flanges and +EL / -AZ offset +EL / 0 AZ offset +EL / +AZ offset connectors should be secure and tight. Polarizer must be correctly aligned with spacecraft used for testing (K band feeds). Null adjustment will be performed at position 1 3. EUT does not have Angle Position 6 Position 1 Position 2 display 0 EL / -AZ offset No offsets 0 EL/+ AZ offset eam Center In this case AVT will instruct EUT to stop antenna movement as each position is reached. EUT must be able to move the antenna accurately in small increments. Position 7 Position 8 Position 9 -EL / -AZ offset -EL / 0 AZ offset -EL / +AZ offset

6 Transmit Antenna Patterns Page 6 of 6 A C UP RETRACT (RET) A C UP EXTEND (EXT)) A C RETRACT (RET) A C EXTEND (EXT) CW CW To demonstrate compliance with mandatory sidelobe pattern specification provided in the IESS document for the antenna standard under test. To measure the transmit gain of the antenna so that sidelobe and off axis emission requirements can be demonstrated. To provide additional data on cross polarization performance. Antenna patterns will be performed over +/- 12 degrees. AVT will provide secant corrections for elevation over azimuth mounts. To correct for non-linearity of jackscrew type antenna drive systems EUT must provide jackscrew dimensions in both azimuth and elevation. EUT will move the antenna to a point slightly greater than -12degrees to allow for startup errors due to antenna inertia. At AVT request, the EUT will move the antenna and provide a MARK at the start, beam center and stop points. Direction of Jackscrew for upward movement of antenna: EXT or RET Azimuth C = Meters Slew rate = deg/sec Azimuth CA = Meters Azimuth A = Meters Top view Direction of Jackscrew for clockwise movement of antenna: EXT or RET Elevation C = Meters Slew rate = deg/sec Elevation CA = Meters Elevation A = Meters Side view (/(9$7,21 %-$&.6&5(: -$&.6&5(: $02725,I\RXUDQWHQQDKDVD MDFNVFUHZ\RXPXVWPHDVXUH DQGUHFRUGMDFNVFUHZDQGVOHZ UDWHLQIRUPDWLRQSULRUWR DQWHQQDSDWWHUQWHVWLQJ &(/(9$7,21$;,6 %Ã-$&.6&5(:3,927 & $=,087+ $;,6 $ Ã-$&.6&5(:3('(67$/3,927 (/(9$7,21$;,6 09/06/2814A Ã)RUÃ(OHYDWLRQÃ3LYRWÃVHHÃ$]LPXWKÃSURMHFWLRQ

Earth-Stations. Performance Requirements

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