47 MHz Carriage House Receiver/Transmitter Receiver Log

 as of Saturday, 05-Jul-2008 15:27:11 AST

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NameEmailDateComment
ANS anolla@naic.edu 11/4/99 There it was a bad PIN diode on the first T/R sw causing chn. B not to be seen. VI checked it.
ANS anolla@naic.edu 7/26/2001 The recvrs were hooked to RA , they were installed for radar mode.
ANS anolla@naic.edu 11/9/2001 There is not 47 MHz receiver due that the L.O. synth was removed in order to use it for a test with the 430 MHz receiver at the Dome.
ANS anolla@naic.edu 1/21/2002 L.O. synth back into system , but is off due to RFI caused by it.In case that somebody want to use it we have to go up and turn the synth on.
ANS anolla@naic.edu 4/3/2002 The receiver LO frequency is 76.8 Mhz .
ansanolla@naic.eduFriday, August 9, 2002 08:38:31The L.O. Synth is off to avoid RFI.
ansanolla@naic edu.Monday, March 10, 2003 13:12:02The L.O. synth was on since January.It was turned off.
ansanolla@naic.eduWednesday, August 11, 2004 15:06:58Receiver set for xmitter mode. L.O. synth. off , it causes rfi to the lb receivers.
ansanolla@naic.eduMonday, August 16, 2004 09:57:56System set up for a radar run , Synth. on.
ansanolla@naic.eduFriday, October 8, 2004 13:29:13The 47 mhz receiver had the L.O. synth off ,was turned on.
ansanolla@naic.eduThursday, October 21, 2004 14:16:5047 mhz receiver L.O. on for T1998 run tomorrow.
ansanolla@naic.eduWednesday, November 17, 2004 10:54:18L.O. synth is off.
ansanolla@naic.eduThursday, December 30, 2004 14:27:04System set for R.A. . Synth on.
ansanolla@naic.eduTuesday, January 25, 2005 13:05:03L.O. synth is off in order to avoid rfi coming from the 47 Mhz recvr.It causes rfi at the LBW recvr.
ansanolla@naic.eduTuesday, February 8, 2005 15:49:35The 47 Mhz L.O. synth is on.
ansanolla@naic.eduWednesday, April 27, 2005 14:14:02System set to R.A. mode, synth. ON. System under operational R.A. conditions.
BJwgenter@naic.eduFriday, May 6, 2005 10:36:17LO off until 15 May 2005.
ansanolla@naic.eduWednesday, May 18, 2005 09:01:33System is off , Dan cancelled its run with it.
W. Genterwgenter@naic.eduMonday, July 18, 2005 14:10:39Found CH B non operational this AM during System checks. Changed CH A IF output for CH B and found that there was no output in CH A. Problem is in the cable or IF AMP in Receiver Room.
W. Genterwgenter@naic.eduMonday, July 18, 2005 14:56:12The problem with CH B located and repaired. Evidently the CH B cable had been to removed to work on the chassis (paint) and the CH B cable had not been securely attached.
ansanolla@naic.eduMonday, November 21, 2005 11:16:30The recvr was checked , it is in the R.A. mode.The synth L.O. is off to avoid RFI.
ansanolla@naic.eduThursday, January 19, 2006 13:59:11On 1/17/2006 WG found that the receiver was dead.It was found that somebody removed the HP LO synth ac power from the UPS , so there it was a power dip that shut off the synth rf power for not been in the UPS.Recvr checked this morning and was ok.
ansanolla@naic.eduThursday, January 19, 2006 14:03:18Forgot to mention that the recvrs cal are the followings: Channel A cal value is 5700 k deg & channel B cal value is 4792 k deg. Tsys for both channels normaly =/- 800 k deg. A/L change is =/- 10 db.
ansanolla@naic.eduTuesday, January 24, 2006 15:33:16There was a complaint that the system was not phase locking.JRV found that the X2 multiplier P.S. for the reference signal of the HP synth for the LO was bad.
ansanolla@naic.eduThursday, February 2, 2006 09:40:24Switching power supply replaced at the X 2 reference multiplier for the LO synt.


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