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operations:documentation_ops2 [2012/08/15 02:14] Jim Lovell |
operations:documentation_ops2 [2012/08/15 04:36] Jim Lovell [Before the Observations] |
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There are four computers at each site that run the most important items of hardware or software. They are: | There are four computers at each site that run the most important items of hardware or software. They are: | ||
- | ^Type ^ }} | + | ^Type ^ Function ^ Computer Name ^^^ Access with... ^ |
- | + | ||
- | Lastly, check that the software on the timing PCs is running | + | |
- | * [[operations:documentation.ivs.timingsw|Software on the timing PC]] | + | |
- | Function ^ Computer Name ^^^ Access with... ^ | + | |
^ ^ ^ Hobart ^ Katherine ^ Yarragadee ^ ^ | ^ ^ ^ Hobart ^ Katherine ^ Yarragadee ^ ^ | ||
|PC Field System | Linux PC that runs Field System software to control the antenna, DBBC and Mark5 | pcfshb | pcfske | pcfsyg | ssh, VNC (display 1) | | |PC Field System | Linux PC that runs Field System software to control the antenna, DBBC and Mark5 | pcfshb | pcfske | pcfsyg | ssh, VNC (display 1) | | ||
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== Check the maser == | == Check the maser == | ||
+ | * [[operations:maser_check|Hydrogen Maser check]] | ||
+ | |||
== DBBC Configuration == | == DBBC Configuration == | ||
+ | The Digital Base-Band Converter (DBBC) takes the IF signals from the telescope and digitises them for the Mark5 recorder. The DBBC needs to be properly configured prior to an observation: | ||
+ | * [[operations:documentation.DBBCSetupIVS_v2|Configuring the DBBC]] | ||
+ | |||
== Mark5 Recorder setup == | == Mark5 Recorder setup == | ||
- | == Clock and delay check == | + | Next the Mark5 recorder needs to be prepared for the observations. |
+ | * [[operations:documentation.ivs.mark5_v2|Mark5B recorder setup]] | ||
+ | |||
+ | == Clock and delay check == | ||
+ | * [[operations:documentation.clock_and_delay_check|Checking clock offsets and delays]] | ||
+ | |||
+ | |||
+ | ===== Test Recording ===== | ||
+ | |||
+ | Now make a test recording using the Mark5. This is done through the Operator Input window. | ||
+ | |||
+ | <code>disk_record=on | ||
+ | mk5=dot? (Output should appear as before, but it should say FHG_on) | ||
+ | disk_record=off</code> | ||
+ | Now check the data are OK: | ||
+ | <code>scan_check</code> | ||
+ | Check the last numbers are the correct date at the start of the scan, duration, the data rate (should be 256 for the 8MHz mode, 128 for the 4 MHz mode) and 0 at the end for no problems. Then plot an autocorrelation from the data: | ||
+ | <code>postob</code> | ||
+ | The output should appear in the pcfs[hb|ke|yg] VNC session. Good data should contain quite flat bandpasses and zero phase. See [[operations:monitoring_autocor|autocorrelation spectra plots]] for an example and what problems to look out for. If there's a problem, the DBBC may need reconfiguring. | ||
+ | |||
+ | To clear the disk module, ONLY IF YOU'RE CERTAIN there is no data already on the disk! | ||
+ | <code> mk5=protect=off; mk5=reset=erase </code> | ||
+ | [[operations:monitoring_autocor|Check that the spectra are OK]]. | ||
+ | If there are dropped or strange-looking bands, the [[hardware:dbbc.reprogram|DBBC may need reprogramming]]. | ||
+ | |||
+ | |||
== Test recording == | == Test recording == | ||
== System Temperature (Tsys) check == | == System Temperature (Tsys) check == | ||
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- | The Digital Base-Band Converter (DBBC) takes the IF signals from the telescope and digitises them for the Mark5 recorder. The DBBC needs to be properly configured prior to an observation: | + | |
- | * [[operations:documentation.DBBCSetupIVS|Configuring the DBBC]] | + | |
- | Next the Mark5 recorder needs to be prepared for the observations. | + | |
- | * [[operations:documentation.ivs.mark5|Mark5B recorder setup]] | + | |
Lastly, check that the software on the timing PCs is running | Lastly, check that the software on the timing PCs is running | ||
* [[operations:documentation.ivs.timingsw|Software on the timing PC]] | * [[operations:documentation.ivs.timingsw|Software on the timing PC]] |