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# <a name="Communication Team Workshop Dece"></a> Communication Team Workshop December 13th, 2003

**In attendance:** Glenn, Tim, Timr, Dave H, and Andrew &amp; Solomon (just to drop off equipment)

**Summary:** _Someone put a summary here._

----

**Pre-lab:**

1. Timr adds a pass-through to the bell jar base plate (done)
2. Glenn makes final balun for slot (not done)
3. Tim makes a flat Teflon-dielectric CPA (not done)

**Need to bring/have:**

1. Bell jar, base, CPA's, vacuum pump, power strip, hoses, avionics module - Andrew
2. All reference dipoles and new slot balun - Glenn
3. Patch cords, automotive vacuum gauge - Timr
4. Teflon gluing process? teflon-dielectric flat CPA? - Tim

**The test plan:**

1. Suck tests
  1. Test Wifi CPA in bell jar at room pressure.
  2. Suck on Wifi: as many points as possible, at least 0, 35,000ft, vacuum. Then go down to look for hysteresis. How fast does the foam expand and contract? How long until it stabilizes?
  3. Suck on GPS as above.
  4. Suck on ATV as above.
2. Slot antennas
  1. f0/SWR on [[WiFi]] slot
  2. f0/SWR on GPS slot
  3. f0/SWR on ATV slot
3. Dipoles
  1. f0/SWR on [[WiFi]] dipole
  2. f0/SWR on ATV dipole

**If there's time left:**

1. Do some crude propogation tests on [[WiFi]] and ATV slots using reference dipoles.
2. f0/SWR on Teflon CPA.

----

## <a name="Testing Notes"></a> Testing Notes

<div>
  <center>[[SCRN00.JPG]]<br><font size="-1"> <em>SCRN00.JPG: [[WiFi]] CPA on bell jar base. Bell not yet placed over it.</em> </font></center>
</div>

<div>
  <center>[[SCRN01.JPG]]<br><font size="-1"> <em>SCRN01.JPG: This is a junk image. Accidently recorded.</em> </font></center>
</div>

<div>
  <center>[[SCRN02.JPG]]<br><font size="-1"> <em>SCRN02.JPG: [[WiFi]] CPA in jar at 1 ATM.</em> </font></center>
</div>

<div>
  <center>[[SCRN03.JPG]]<br><font size="-1"> <em>SCRN03.JPG: [[WiFi]] CPA in jar at -8 in. Hg</em> </font></center>
</div>

<div>
  <center>[[SCRN04.JPG]]<br><font size="-1"> <em>SCRN04.JPG: [[WiFi]] CPA in jar at -14 in. Hg</em> </font></center>
</div>

<div>
  <center>[[SCRN05.JPG]]<br><font size="-1"> <em>SCRN05.JPG: [[WiFi]] CPA in jar at -27 in. Hg</em> </font></center>
</div>

<div>
  <center>[[SCRN06.JPG]]<br><font size="-1"> <em>SCRN06.JPG: [[WiFi]] CPA in jar at 27.5 in. Hg for about 2 minutes.</em> </font></center>
</div>

<div>
  <center>[[SCRN07.JPG]]<br><font size="-1"> <em>SCRN07.JPG: [[WiFi]] CPA in jar back at 1 ATM; Measurement taken immediately.</em> </font></center>
</div>

<div>
  <center>[[SCRN08.JPG]]<br><font size="-1"> _SCRN08.JPG: _ [[WiFi]] CPA in jar back at 1 ATM; Measurement taken after 2 minutes.</font></center>
</div>

<div>
  <center>[[SCRN09.JPG]]<br><font size="-1"> <em>SCRN09.JPG: [[WiFi]] CPA after jar removed.</em> </font></center>
</div>

<div>
  <center>[[SCRN10.JPG]]<br><font size="-1"> <em>SCRN10.JPG: 2.4 GHz reference dipole.</em> </font></center>
</div>

<div>
  <center>[[SCRN11.JPG]]<br><font size="-1"> _SCRN11.JPG: _ 2.4 GHz reference dipole.</font></center>
</div>

<div>
  <center>[[SCRN12.JPG]]<br><font size="-1"> <em>SCRN12.JPG: 1.5 GHz slot with nothing behind the apature. When the avionics playload is placed behind the apature, the SWR becomes real bad (&amp;gt; 5:1 SWR) at all frequencies.</em> </font></center>
</div>

<div>
  <center>[[SCRN13.JPG]]<br><font size="-1"> <em>SCRN13.JPG: 1.2 GHz CPA on bell jar base. Bell not yet placed over it.</em> </font></center>
</div>

<div>
  <center>[[SCRN14.JPG]]<br><font size="-1"> <em>SCRN14.JPG: 1.2 GHz CPA in jar at 1 ATM.</em> </font></center>
</div>

<div>
  <center>[[SCRN15.JPG]]<br><font size="-1"> <em>SCRN15.JPG: 1.2 GHz CPA in jar at -8?? in. Hg</em> </font></center>
</div>

<div>
  <center>[[SCRN16.JPG]]<br><font size="-1"> <em>SCRN16.JPG: 1.2 GHz CPA in jar at -21 in. Hg</em> </font></center>
</div>

<div>
  <center>[[SCRN17.JPG]]<br><font size="-1"> <em>SCRN17.JPG: 1.2 GHz CPA in jar at -23 in. Hg</em> </font></center>
</div>

<div>
  <center>[[SCRN18.JPG]]<br><font size="-1"> <em>SCRN18.JPG: 1.2 GHz CPA back at 1 ATM and jar removed.</em> </font></center>
</div>

<div>
  <center>[[SCRN19.JPG]]<br><font size="-1"> <em>SCRN19.JPG: I&#39;m not sure what this is.</em> </font></center>
</div>