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Entry  Thu Dec 10 13:10:25 2009, Alberto, Configuration, LSC, 166 LO Disconnected 
    Reply  Thu Dec 10 18:31:44 2009, Alberto, Configuration, LSC, 166 LO Disconnected 
       Reply  Fri Dec 11 09:30:09 2009, Koji, Configuration, LSC, 166 LO Disconnected 
          Reply  Fri Dec 11 11:42:26 2009, Alberto, Configuration, LSC, 166 LO Disconnected 
             Reply  Fri Dec 11 14:12:32 2009, rana, Configuration, LSC, 166 LO Disconnected 
                Reply  Fri Dec 11 19:51:13 2009, Alberto, Configuration, LSC, 166 LO Disconnected 
                   Reply  Sat Dec 12 07:36:56 2009, rana, HowTo, Electronics, How to Measure the Length of a Cable: Interferometry 
Message ID: 2395     Entry time: Fri Dec 11 09:30:09 2009     In reply to: 2393     Reply to this: 2396
Author: Koji 
Type: Configuration 
Category: LSC 
Subject: 166 LO Disconnected 

They must not be dBm, must be dB

Quote:

Quote:

I temporarily disconnected the Heliax cable that brings the 166MHz LO to the LSC rack.

I'm doing a couple of measurement and I'll put it back in as soon as I'm done.

 These are the losses I measured on a RG-174 cable for the two frequencies that we're planning to use in the Upgrade:

@11MHz Loss=0.22dBm/meter

@55MHz Loss=0.41dBm/meter

(The cable was 2.07m long. The input signal was +10dBm and the output voltages at the oscilloscope where: Vpk-pk(11MHz)=1.90V, Vpk-pk(11MHz)=1.82V )

 

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