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| 40m Log |
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Message ID: 1424
Entry time: Tue Mar 24 23:23:05 2009
In reply to: 1423
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| Author: |
rana |
| Type: |
Update |
| Category: |
LSC |
| Subject: |
New PO DC |
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We also found that the SPOB RF cable was going through a splitter before going into the SPOB demod board. The other
input of the splitter was open (not terminated). Using 50m Ohm devices without terminated inputs is illegal. It
makes there be standing waves in the cables and makes the RF phase very dependent on cable lengths. We took away
the splitter and ran the cable straight. So expect some change in the SPOB gain and phase plus some shame. |