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Re: Copying AO-40, but not sure why



Hi Bill,

I think you are seeing exactly what one might expect with your 
setup/downconverters:

2401.390 ---> 145.390 ---> 28.390

What 2.4GHz frequency were you targeting?

73,

Mark N8MH


At 12:26 PM 4/20/2001 -0400, you wrote:
>Here's the setup:  Drake 2880 with crystal mod 8.8125,
>removed the two IF coils and that's all.
>
>Output the Drake into a Hamtronics CA145-28 converter.
>
>Output the Hamtronics converter into my ICOM 756 PRO.
>Listened for signal at 27.0318 Mhz...never heard a thing.
>
>Decided to tune around the 28 Mhz band to see if I could hear
>anything...Viola!! at 28. 39905 I hear this buzzing sound.
>Put my Radio Shack wireless headset on and went outside
>where I had the Bob Meyers Bar-b-cue grill leaning against
>a chair and pointing to where I thought AO-40 was.   I picked
>it up and moved it around and the signal went up and down
>and was strongest where AO-40 should be.  Was this AO-40
>are some RADAR signal somewhere?
>
>Back into the house I brought up WECPSK version 1.1a.
>Double Viola!!! The program began to copy...I've added
>a bit of what I got below...I still have to go through and see
>if I have any valid CRC blocks, but at this stage, I'm amazed
>at what I got with my kludged setup.
>
>Big question is, why am I received the signals at 28.38723?
>This was the final frequency I was receiving on before LOS.
>
>The Hamtronics CA145-28 was peaked around 145 MHz, and
>while I was receiving AO-40 I peaked the RF and multiplier
>coils for maximum signal strength, around S-9 on the 756
>PRO...the spectrum scope sure helps in finding a signal.
>
>I would appreciate any comments on why I'm receiving at
>around 28.380-28.399MHz.
>
>tnx, de Bill, N4DH
>
>----------------------------------------------------------------------------------------------------------------------------------
>Here is a bit of what I copied.
>
>NOT REGISTRED WPSKDEC 1.1d - AMSAT-FRANCE
>
>## AO-40 IHU-1 Telemetry Display - OE1KIB, OE1VKW, F1HDD, XTOPHE ##
>A  HI, THIS IS AMSAT OSCAR-40       2001-04-20  15:20:04  #00DD
>+----------------------------------.--------------.------------+
>|      All beacons will be OFF from MA = 3 to MA = 80          |
>+--------------------------------------------------------------+
>________________________ Orbit data ____________________________
>AMSAT day 08510  Time 15:20:04.36 UTC  Orbit No 00216  Phase 245
>________________________ Status ________________________________
>RX: U(-2.2dB) L1(0.6dB)
>TX: S2(0x6bW MB)
>Beacons: GB(PSK;) MB(EB source; S2/Ku)
>Ant/Pre-amps: V-Rx=hi V-Tx=om U-Rx=hi U-Tx=om L-hi+preamp
>Experiments: IHU-2
>Main battery on; Memory soft error count: 3
>________________________ Temperatures [°C] _____________________
>  SolPan1  -22.3  SolPan2  -17.6  SolPan3  -17.6  SolPan4  -18.3
>  SolPan5  -17.6  SolPan6  -20.9
>  BCR1       8.7  BCR2      17.3  BCR3      14.7
>  MainBatB2 35.1  MainBatB4 97.7  MainBatB6-22.3
>  AuxBatB1  39.0  AuxBatB5  19.9
>  V-TX      16.6  U-Excit   13.3  U-Amp     20.6  S1-TX     10.0
>  S2-TX     13.3  X-TX      86.5  X-TX TWT  88.5
>  U&V-RX     6.7  L1-RX      8.7  L2-RX     14.0  S1-HF RX  14.0
>  S2-C RX   14.7  IHU        4.1  SEU        2.8  EPU       18.6
>  HP1+X-Y   20.6  HP2+X+Y   17.9  HP2+X-Y   17.9  HP2-X     97.7
>  HP3+X     12.7  HP3-X     13.3  HP4+X+Y    9.4
>  NH3 B2    37.1  MMH B3    16.0  N2O4-X-Y  97.7  N2O4+X+Y  14.7
>  He Tank   97.7
>  Top       97.7  Bottom    97.7  Back      97.7  Side2Pan  -0.5
>  Side4Pan  -2.5  S ant      1.5
>________________________ Voltages [V] __________________________
>  Main-Bat  27.9  Aux-Bat   24.4
>  BCR1-In   19.8  BCR2-In   23.3    BCR3-In   23.2
>  28V Bus   27.6  10V-C1BCR2  10.5  10V-C2BCR3  10.6
>________________________ Currents [mA] _________________________
>  SP1-BCR1 16427  SP4-BCR2 16427  SP2-BCR3 16427
>  SP6-BCR1 16427  SP5-BCR2 16427  SP3-BCR3 16427
>  10V-C1BCR2  2025  10V-C2BCR3  2038  28V-SSEU 0x9b
>  28V-Bat   1014  28VU1EPU    -1  28VU2Bus  2807
>  28VU3-S    558  28V-BCR   3443
>  28VS-PA/M 4601  10VS-PA/M 0xa5  X-Helix      3 K-Tx      0x8c
>________________________ Sun/Earth Sensors _____________________
>Sensor mode: spin
>  SS1 PLL: locked  SS2 count: 242  SpinRate[rpm]   0.9
>  SS Z-25    -4°  SS Y-25    -4°  SS Up-X     0°  SS Up-Y     0°
>  SS Z-45    -6°  SS Y-45    -6°  SS Dwn-X   85°  SS Dwn-Y   58°
>###### AO-40 IHU-1 Telemetry Display --- End of A/E Block ######
>
>  CRC NOT VALID 2d6 instead 18c5
>  NOT REGISTRED WPSKDEC 1.1d - AMSAT-FRANCE
>
>M  QST de AO-40  2001 Apr 15. Best estimate of attitude Alat=14;Alon as 
>per table.  Your telemetry, good or"...  .E@..pi.tÉ.  DÊxÐe@ .an...aj.x oÊ 
>.pÆ  v.b.e.B..tH @P.Ê... "b.."@.o.@ti.p  JÏu".a.À. ..x.m.HtÙ ...e. b|. 
>Fehd ...@.b.tt.lg...M.Df.j.Æ...p.$N.rÈ biJ@A.eÐ p TeF B`.n@¼ T.¼@A.f. 
>.@.fp@.l.. ø Rö.....h. .Åp Blfd  4Q0 @122 ¼ .1U @Q15@| 210 @1.8 | R19  101 
>| 222  94 | 225   .   R1a  240 . 214  112 | .17  R05 | 220 @98@ p R20  Aa 
>|@4RV@ 84   412  1Q7 L R1.  1Q0@¼@4Q8 @R`5 p@RT1  :.  | .24  89 | .27 @8R@
>  CRC NOT VALID e5f8 instead 9a2b
>
>----
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Mark L. Hammond  [N8MH]

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