40m
QIL
Cryo_Lab
CTN
SUS_Lab
TCS_Lab
OMC_Lab
CRIME_Lab
FEA
ENG_Labs
OptContFac
Mariner
WBEEShop
|
40m Log |
Not logged in |
 |
|
Wed Jan 25 15:41:29 2017, Lydia, Update, IMC, 29.5 MHz modulation depth measurement plan
|
Wed Jan 25 17:30:03 2017, Koji, Update, IMC, 29.5 MHz modulation depth measurement plan
|
Wed Jan 25 19:39:07 2017, gautam , Update, IMC, 29.5 MHz modulation depth measurement plan
|
Fri Jan 27 21:25:11 2017, Lydia, Update, IMC, 29.5 MHz modulation depth
|
Sat Jan 28 01:25:51 2017, gautam, Update, IMC, 29.5 MHz modulation depth 
|
Mon Jan 30 19:07:48 2017, gautam, Update, IMC, RF AM stabilization box pulled out
|
Tue Jan 31 01:07:20 2017, Lydia, Update, IMC, RF AM stabilization box pulled out
|
Tue Jan 31 13:46:34 2017, rana, Update, IMC, RF AM stabilization box pulled out
|
Tue Jan 31 14:17:48 2017, gautam, Update, IMC, RF AM stabilization box pulled out
|
Tue Jan 31 22:07:13 2017, gautam, Update, IMC, RF AM stabilization box revamp
|
Tue Jan 31 22:28:39 2017, Lydia, Update, IMC, RF AM stabilization box pulled out
|
Wed Feb 1 11:51:19 2017, Koji, Update, IMC, RF AM stabilization box pulled out
|
Wed Feb 1 16:45:56 2017, Lydia, Update, IMC, RF AM stabilizer box Modification Plan
|
Wed Feb 1 20:49:34 2017, rana, Update, IMC, RF AM stabilizer box Modification Plan
|
Wed Feb 1 23:13:30 2017, Lydia, Update, IMC, RF AM stabilizer box Modification Plan
|
Sun Feb 5 21:56:50 2017, Lydia, Update, IMC, 29.5 MHz stabilizer box replacement
|
Tue Feb 7 12:01:10 2017, Lydia, Update, IMC, 29.5 MHz stabilizer box replacement
|
Tue Feb 7 17:00:55 2017, Lydia, Update, IMC, 29.5 MHz stabilizer box replacement
|
Fri Feb 10 02:14:10 2017, gautam, Update, IMC, 29.5 MHz stabilizer box replacement
|
Fri Feb 10 11:41:43 2017, Lydia, Update, IMC, 29.5 MHz stabilizer box replacement
|
Fri Feb 10 13:24:28 2017, rana, Update, IMC, 29.5 MHz stabilizer box replacement
|
Fri Feb 10 18:21:21 2017, gautam, Update, IMC, IMC Demod board
|
Fri Feb 10 19:32:15 2017, Koji, Update, IMC, IMC Demod board
|
Sun Feb 12 01:16:57 2017, gautam, Update, IMC, IMC length loop - summary of changes    
|
Mon Feb 13 11:55:14 2017, rana, Update, IMC, IMC length loop - summary of changes
|
Mon Feb 13 13:34:44 2017, gautam, Update, IMC, IMC length loop - bad SMA cable replaced
|
Mon Feb 13 19:44:55 2017, Lydia, Update, IMC, Front panel for 29.5 MHz amplifier box
|
Wed Mar 1 21:15:40 2017, Lydia, Update, IMC, Front panel for 29.5 MHz amplifier box
|
Wed Mar 1 23:56:09 2017, gautam, Update, IMC, Front panel for 29.5 MHz amplifier box
|
Thu Mar 2 20:32:18 2017, Lydia, Update, IMC, Front panel for 29.5 MHz amplifier box
|
Wed Feb 15 23:54:13 2017, gautam, Update, IMC, IMC saga continues... 
|
Fri Feb 17 20:10:18 2017, gautam, Update, IMC, WFS servos turned back on
|
Sat Feb 18 14:09:06 2017, rana, Update, IMC, WFS servos turned back on
|
Sat Feb 18 21:50:48 2017, gautam, Update, IMC, WFS servos turned back on
|
Sun Mar 5 12:41:23 2017, gautam, Update, IMC, WFS servo-steppin  
|
|
Message ID: 12756
Entry time: Wed Jan 25 17:30:03 2017
In reply to: 12755
Reply to this: 12758
|
Author: |
Koji |
Type: |
Update |
Category: |
IMC |
Subject: |
29.5 MHz modulation depth measurement plan |
|
|
I'm afraid that the bidirectional coupler, designed to be 50ohm in/out, disturbs the resonant circuit designed for the EOM which is almost purely capacitive.
One possible way could be to measure the transfer function using the active FET probe from the triple resonant input to the output with the EOM attached.
Another way: How about to measure the reflection before the resonant circuit? Then, of course, there is the triple resonant interface circuit between the power combiner and the EOM. This case, we will see how much power is consumed in EOM and the resonant circuit. Then we can use the previous measurement to see the conversion factor between the power consumption to the modulation depth. Kiwamu may give us his measurement. |