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 Fri Apr 15 12:17:39 2011, kiwamu, Update, LSC, 11MHz demod board : funny I-Q phase 
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 Fri Apr 15 15:15:08 2011, kiwamu, Update, LSC, 11MHz demod board : 90 degree splitter
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Sat Apr 16 02:00:14 2011, rana, Update, LSC, 11MHz demod board : 90 degree splitter
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Mon Apr 18 13:05:57 2011, kiwamu, Summary, LSC, demod board modification
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Mon Apr 18 14:11:44 2011, kiwamu, Update, LSC, RF status
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Thu Apr 21 21:24:41 2011, kiwamu, Update, LSC, demod board : new 90 deg splitter
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Thu Apr 21 21:46:22 2011, kiwamu, Update, LSC, demod board : new 90 deg splitter
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Fri Apr 22 11:08:50 2011, kiwamu, Update, LSC, demod board AS11 : amplitude imbalance
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Message ID: 4537
Entry time: Sat Apr 16 02:00:14 2011
In reply to: 4533
Reply to this: 4538
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| Author: |
rana |
| Type: |
Update |
| Category: |
LSC |
| Subject: |
11MHz demod board : 90 degree splitter |
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One way to avoid some of the bad stuff in there is to take the 1 dBm input and amplify it to ~21 dBm before splitting and sending in to the Level 17 mixers.
One way to do this is by using the A3CP6025 from Teledyne-Cougar. Its an SMA connectorized amp which can put out 25 dBm and has a gain of 24 dB. We can just glue it onto the demod boards. Then we can remove the ERA-5 amplifiers and just use the broadband splitter as Kiwamu mentioned. |