DSS 14 MEX BSR Noise Tests 12 May 2004 (JPL 303-300A; 2:30-4:00 PM) 13 May 2004 (SPC 10; 8:00 AM - 1:45 PM) Participants: Sami Asmar (Weds) Elias Barbinis (Weds; by voice net Thurs) Larry Bracamonte (Thurs) Art Freiley (all) Doug Hofhine (Thurs) Dick Simpson (all) Charles Stelzreid (Weds) Jose Valencia (all) Jesse Velasco (all) Steve Smith (Thurs) Wednesday PM: Discussed calibration procedure drafted by Valencia and edited by Simpson. Discussed schedule for tests at DSS 14 Thursday. Discussed noise data analysis with Stelzreid and Freiley. Thursday: Reviewed draft procedures with Bracamonte and Hofhine; Bracamonte made corrections in configuration diagrams and suggested refinements to procedures. Specifically: a. Outputs from RMSA and DA are only from O1 and O2. These go to a single Downconverter Assembly (but which can handle up to four channels), which shifts microwaves to 300 MHz IF. Those outputs are then routed to ope- and closed-loop receivers. b. RSR assignments are done by the RSR user, not necessarily at the station c. Depending on configuration, it may be necessary to add a command of the form DC02 SET RCV IFS=2 before a command like DC02 CONN DSS14SO2 The IFS assignment is situation dependent; operators should be able to figure this out. Two sets of tests were conducted. RSR's were set up as follows and they recorded continuously: RSR2A X-RCP X-up X-down predicts RSR3B X-LCP X-up X-down predicts RSR2B S-RCP X-up S-down predicts RSR3A S-LCP X-up S-down predicts Test with Noise Instrumentation In the first set of tests, Freiley and Hofhine configured the Noise Instrumentation sequentially for S-RCP, S-LCP, X-RCP, and X-LCP. For each band/polarization configuration they requested the following four inputs, in the order listed. Two or three repetitions of the cycle in each band/polarization configuration were completed. Details are blow. ambient load alone ambient load + noise diode cold sky + noise diode cold sky alone --------+---+---+---+------------------------------------------------------ ERT(UTC) SKY ND AMB --------+---+---+---+------------------------------------------------------ 17:11:00 ALL AMB on all 4 channels. Elias using AUTO feature to set ATT levels 17:30:00 ALL RSR's recording; Begin cycling through S-RCP steps --------+---+---+---+------------------------------------------------------ S-RCP Begin cycling through S-RCP steps --------+---+---+---+------------------------------------------------------ 17:37:11 X X S-RCP ND ON 17:37:29 X X S-RCP to sky (but probably through low-noise path) 17:38:10 X X S-RCP to sky through diplexer 17:38:50 X S-RCP ND OFF 17:42:00 X S-RCP to AMB 17:43:59 X X S-RCP ND ON 17:44:35 X X S-RCP to sky via diplexer 17:45:13 X S-RCP ND OFF 17:45:45 X RFI reported by Hofhine 17:46:26 X RFI saturating Noise Instrumentation 17:47:30 X S-RCP to AMB 17:49:05 X X S-RCP ND ON 17:49:37 X X S-RCP to sky via diplexer 17:50:25 X S-RCP ND OFF --------+---+---+---+------------------------------------------------------ 17:52:47 S-LCP Reconfigure Noise Instrumentation for S-LCP; S-RCP remains on sky via diplexer for henceforth; Need to reconfigure IFS for S-LCP; --------+---+---+---+------------------------------------------------------ 17:52:47 X S-LCP has been on AMB since beginning 17:54:23 X Error attempting to turn S-LCP ND ON 17:56:25 X X S-LCP ND ON 17:58:35 X X S-LCP to sky via low-noise path (as desired) 17:59:53 X S-LCP ND OFF 18:02:15 X S-LCP to AMB 18:03:05 X X S-LCP ND ON 18:03:50 X X S-LCP to sky via low-noise path 18:04:25 X S-LCP noise diode OFF --------+---+---+---+------------------------------------------------------ 18:06:00 X-RCP Begin X-RCP test (already configured); S-RCP and S-LCP remain out the horn; X-RCP and X-LCP are on ambient load initially --------+---+---+---+------------------------------------------------------ 18:09:00 X Hofhine asks which frequency? Simpson says 8423 18:11:51 X X X-RCP ND ON (12.5 K, modulation = ON) 18:13:14 X X X-RCP to sky (one command) 18:13:50 X X-RCP ND OFF 18:15:56 X X-RCP to AMB (one command) 18:17:30 X X X-RCP ND ON 18:18:30 X X X-RCP to sky (one command) 18:19:14 X X-RCP ND OFF --------+---+---+---+------------------------------------------------------ 18:20:00 X-LCP Begin X-LCP test; Reconfigure DC01 to X02 --------+---+---+---+------------------------------------------------------ 18:22:20 X X-LCP to AMB (one command) 18:23:17 X X X-LCP ND ON 18:24:43 X X X-LCP to sky (one command) 18:25:03 X X-LCP ND OFF 18:27:30 X X-LCP to AMB (one command) 18:28:25 X X X-LCP ND ON (some trouble getting the noise diode to turn on; in the process it may have accidently been reset to 0.25K) 18:29:11 X X-LCP ND OFF 18:31:43 X X X-LCP ND ON (12.5K) 18:33:35 X X X-LCP to sky (one command) 18:34:08 X X-LCP ND OFF 18:35:47 X X-LCP to AMB (one command) 18:36:31 X X X-LCP ND ON 18:37:44 X X X-LCP to sky (one command) 18:38:44 X X-LCP ND OFF 18:40:19 X X-LCP to AMB (one command) 18:41:38 X X X-LCP ND ON 18:42:32 X X X-LCP to sky (one command) 18:42:50 X X-LCP ND OFF 18:45:00 X --------+---+---+---+------------------------------------------------------ End of tests The note "one command" when an X-band channel was connected to either the sky or ambient load indicates that a single operator directive was issued but that both polarizations should have been reconfigured. During the tests above, the physical temperatures of the ambient loads were recorded as follows: ERT (UTC) S1 (RCP) S2 (LCP) X1 (both) Notes 17:45 17.711C At Noise Instrumentation 17:55 18.03C At Noise Instrumentation 18:10 11.52C At Noise Instrumentation 18:30 11.55C At Noise Instrumentation 18:39 17.25C 22.44C 11.25C From operator display Test from Script In the second set of tests, the pre-cal script drafted by Valencia and edited by Simpson was used. The same band/polarization configurations and the same four step cycles were completed. But the order was slightly different; and there were times when two tests were, in fact, running in parallel. Details are below. --------+---+---+---+------------------------------------------------------ ERT(UTC) SKY ND AMB --------+---+---+---+------------------------------------------------------ 18:51:00 Barbinis confirms RSR disk space adequate 19:01:28 ALL All channels to ambient loads (S-RCP last to be configured, X-RCP has been OK for some time); All RSR's continue to record; AMB physical temps: S1=17.25; S2=22.62; X1=11.38 from operator display; Noise Instrumentation configured for ??? 19:05:00 X X X-RCP ND ON (12.5K, modulation ON) 19:10:00 X X X-RCP and X-LCP to sky (two commands) 19:15:00 X X-RCP ND OFF; Reconfigure DC01 for X-LCP 19:20:00 X X X-LCP ND ON 19:25:00 X X X-RCP and X-LCP to AMB load (two commands) 19:30:00 X X-LCP ND OFF 19:30:00 X S-RCP continues on AMB 19:35:00 X X-RCP and X-LCP to sky (two commands) 19:35:00 X X S-RCP ND ON 19:40:00 X X S-RCP to sky via diplexer 19:45:00 X S-RCP ND OFF; Reconfigure DC02 for S-LCP 19:45:00 X S-LCP continues on AMB 19:50:00 X X S-LCP ND ON 19:55:00 X X S-LCP to sky 20:00:00 X S-LCP ND OFF; AMB phys temps: S1=17.25, S2=22.81, X1=11.38 from operator display 20:05:00 X Reconfigure DC02 for S-RCP 20:10:00 X End of test --------+---+---+---+------------------------------------------------------ The note "two commands" when an X-band channel was connected to either the sky or ambient load indicates that operator directives was issued for both polarizations but that one command should have been sufficient. Using two commands ensures that the NMC log captures the fact that both polarizations were changed. Original : 16 May 2004 (Simpson)