-----------------------------------------------------------------------------
		Mauna Loa Solar Observatory Observer's Log 
-----------------------------------------------------------------------------
	Fri Sep 10 16:40:51 GMT 1999
Year: 99  Doy: 253
Observer: yasukawa
Fri Sep 10 16:42:04 GMT 1999	CHIP	 Startup--Initializing new tape
WEATHER COMMENT: Fri Sep 10 16:42:11 GMT 1999
Cool, clear, light south breeze.
Fri Sep 10 16:46:54 GMT 1999	CHIP	 CHIP Start Patrol
Fri Sep 10 16:47:00 GMT 1999	PICS	 Start Patrol
Fri Sep 10 16:47:24 GMT 1999    MKIV    Start Patrol
**MKIV PROBLEM**: Fri Sep 10 16:59:48 GMT 1999
pins from sky tx pulled out of connector while trying to attach a probe
to ground pin.  Looking for documentation to figure out which pins of the
37-pin connector they were connected to.
Fri Sep 10 17:02:50 GMT 1999	CHIP	 Bias
Fri Sep 10 17:03:43 GMT 1999	CHIP	 End Bias
Fri Sep 10 17:03:52 GMT 1999	CHIP	 Water
Fri Sep 10 17:04:32 GMT 1999	CHIP	 End Water
**MKIV PROBLEM**: Fri Sep 10 17:38:24 GMT 1999
OK, David saw my log comment and looked up the pin-outs for the 3125 board
and called with the correct pin-outs.  pins replaced and sky tx data,
albeit noisy, is being input to the A/D.  We discussed grounding the inputs
to channel 5 as specified in the 3125 manual to hopefully quiet the
signal.  This will be done when I make up a jumper.
Sky tx is plugged into chan 6, pins 12 (hi) and pin 30 (lo).
PSPT COMMENT: Fri Sep 10 17:42:40 GMT 1999
Got sidetracked and did not start PSPT until a little while ago.
Fri Sep 10 18:00:28 GMT 1999	PICS	 Flat
Fri Sep 10 18:01:51 GMT 1999	CHIP	 Bias
Fri Sep 10 18:02:53 GMT 1999	CHIP	 End Bias
Fri Sep 10 18:03:03 GMT 1999	CHIP	 Water
Fri Sep 10 18:03:08 GMT 1999	PICS	 End Flat
Fri Sep 10 18:03:42 GMT 1999	CHIP	 End Water
Fri Sep 10 18:25:19 GMT 1999    MKIV    Start Cal
Fri Sep 10 18:47:11 GMT 1999    MKIV    Start Patrol
**MKIV PROBLEM**: Fri Sep 10 18:50:29 GMT 1999
Sky tx cap in place for a couple of scans.
**MKIV PROBLEM**: Fri Sep 10 18:51:13 GMT 1999
One of the things this is doing is the guiding is very unstable as the 
signal dropped to nearly dark, and the sky tx provides the agc for 
the guider.
**MKIV PROBLEM**: Fri Sep 10 18:57:48 GMT 1999
Removed cap from sky tx.  a/d chan 5 is grounded to pin 1 (pins 13, 31, and 1
are jumpered together).
**MKIV PROBLEM**: Fri Sep 10 18:59:34 GMT 1999
Now I can see sky tx values on KCC monitor jumping around between 340-350.
Fri Sep 10 19:00:58 GMT 1999	CHIP	 Bias
Fri Sep 10 19:01:28 GMT 1999	PICS	 polarization_calibration
Fri Sep 10 19:01:56 GMT 1999	CHIP	 End Bias
Fri Sep 10 19:02:13 GMT 1999	CHIP	 Water
Fri Sep 10 19:02:56 GMT 1999	CHIP	 End Water
COMMENT: Fri Sep 10 19:09:01 GMT 1999
Stopping to reconfigure dome shutter.
Fri Sep 10 19:09:24 GMT 1999	CHIP	 CHIP End Patrol
Fri Sep 10 19:11:15 GMT 1999	PICS	 End Patrol
Fri Sep 10 19:15:23 GMT 1999    MKIV    End Patrol
Fri Sep 10 19:19:33 GMT 1999    MKIV    Start Patrol
Fri Sep 10 19:19:56 GMT 1999	PICS	 Start Patrol
Fri Sep 10 19:19:56 GMT 1999	PICS	 Start Patrol
Fri Sep 10 20:02:48 GMT 1999	CHIP	 Gain
Fri Sep 10 20:07:22 GMT 1999	CHIP	 End Gain
Fri Sep 10 20:07:32 GMT 1999	CHIP	 Bias
Fri Sep 10 20:08:23 GMT 1999	CHIP	 End Bias
Fri Sep 10 20:08:38 GMT 1999	CHIP	 Water
Fri Sep 10 20:09:19 GMT 1999	CHIP	 End Water
**MKIV PROBLEM**: Fri Sep 10 20:36:44 GMT 1999
I got to checking the signal from the sky tx further and if one slows the
scope down and reduces the sensitivity, the signal is a square wave with a 
duty cycle of around 10% "off" and 90% on, with an amplitude of 3.5 volts,
and a "lo" voltage of 1 volt, measured in DC across the differential lines.
the period is about 17 ms.  The excursion to 1-volt and back is not 
square, but drops rapidly and immediately ramps back up to 3.5 volts
with a 2 ms overshoot and recovery of 0.2 volts amplitude around the 3.5
volt level.  Could this negative "spike" be the cause of the drift?
i.e. reads may occur during the negative excursions or if they are sampled
over a short period, the spike may be part of the average??  What is the
a/d's sampling frequency???  Are several samples averaged over the
display period????  -- Just some food for thought.
Fri Sep 10 21:00:47 GMT 1999	CHIP	 Bias
Fri Sep 10 21:01:44 GMT 1999	CHIP	 End Bias
Fri Sep 10 21:01:59 GMT 1999	CHIP	 Water
Fri Sep 10 21:02:44 GMT 1999	CHIP	 End Water
**MKIV PROBLEM**: Fri Sep 10 21:03:00 GMT 1999
Double checked the fact that I was looking at a differential signal and the
hi to analog ground maintains the waveform I described above and the lo to
analog ground is a noisy 0-volts DC.  So the differential signal IS as 
described above.
Fri Sep 10 22:00:58 GMT 1999	CHIP	 Bias
Fri Sep 10 22:01:57 GMT 1999	CHIP	 End Bias
Fri Sep 10 22:02:16 GMT 1999	CHIP	 Water
Fri Sep 10 22:02:56 GMT 1999	CHIP	 End Water
Fri Sep 10 22:04:30 GMT 1999	PICS	 End Patrol
Fri Sep 10 22:06:27 GMT 1999	CHIP	 CHIP End Patrol
Fri Sep 10 22:07:10 GMT 1999	CHIP	 ending tape
COMMENT: Fri Sep 10 22:08:57 GMT 1999
Tapes:
MKIV:  99-253
PICS:  P01541
CHIP:  C00917
LOWL:  L00625 in drive #1
Fri Sep 10 22:10:51 GMT 1999 
	MkIII	
 
16_47.rawmk3   17_50.rawmk3   19_04.rawmk3   20_12.rawmk3   21_15.rawmk3
16_50.rawmk3   17_53.rawmk3   19_08.rawmk3   20_15.rawmk3   21_18.rawmk3
16_54.rawmk3   17_57.rawmk3   19_12.rawmk3   20_19.rawmk3   21_22.rawmk3
16_57.rawmk3   18_00.rawmk3   19_19.rawmk3   20_22.rawmk3   21_25.rawmk3
17_01.rawmk3   18_04.rawmk3   19_23.rawmk3   20_26.rawmk3   21_29.rawmk3
17_04.rawmk3   18_07.rawmk3   19_26.rawmk3   20_29.rawmk3   21_32.rawmk3
17_08.rawmk3   18_11.rawmk3   19_30.rawmk3   20_33.rawmk3   21_36.rawmk3
17_11.rawmk3   18_14.rawmk3   19_33.rawmk3   20_36.rawmk3   21_39.rawmk3
17_15.rawmk3   18_18.rawmk3   19_37.rawmk3   20_40.rawmk3   21_43.rawmk3
17_18.rawmk3   18_21.rawmk3   19_40.rawmk3   20_43.rawmk3   21_46.rawmk3
17_22.rawmk3   18_29.rawmk3   19_44.rawmk3   20_47.rawmk3   21_50.rawmk3
17_25.rawmk3   18_36.rawmk3   19_47.rawmk3   20_50.rawmk3   21_53.rawmk3
17_29.rawmk3   18_43.rawmk3   19_51.rawmk3   20_54.rawmk3   21_57.rawmk3
17_32.rawmk3   18_47.rawmk3   19_54.rawmk3   20_57.rawmk3   22_00.rawmk3
17_36.rawmk3   18_50.rawmk3   19_58.rawmk3   21_01.rawmk3   22_04.rawmk3
17_39.rawmk3   18_54.rawmk3   20_01.rawmk3   21_04.rawmk3   c18_25.rawmk3
17_43.rawmk3   18_57.rawmk3   20_05.rawmk3   21_08.rawmk3   c18_32.rawmk3
17_46.rawmk3   19_01.rawmk3   20_08.rawmk3   21_11.rawmk3   c18_39.rawmk3