19jun15: nighttime first light, 3 tx's

20jun15

We ran with 3 transmitters on the sky on 19jun15 from 22:30 to 24:00 ast. We used the 430 xmiter to monitor the results.

Setup:

The experiment was done at 5.125 MHz using the 3 tangential antennas. We had trouble with tx 5 so we ended up using:

During the observation we turned the heater on, off as well as switching polarization.

this ended up being the correct circular to use. after about 25 minutes, we stayed here..

hf on at start of minute xx:00
hf off at xx:30 secs
after 10 minutes, we spent one or two minutes switching polarizations (with the tx off)
we then continued the 30 second on off cycle (on the minute: on at:xx:00 , off at: xx:30)

When the hf transmitter state was changed
time [AST] hhmmss	hf state 1-on,0-off	pol	Notes
224400	1	1	Start cycle 30secs on, 30 secs off
224430	0	1	first 30 sec off. The cycle then continues each minute.
225100	0	1	missed the on cycle
225200	1	1	back to 30 sec cycle
225400	0	2	start changing to pol 2
225500	1	2	start pol 2 cycle
230500	0	1	start changing to pol1
230600	1	1	start pol1 cycle
231250	1	1	on started 10 secs early
231600	0	2	start changing to pol2. remain on pol2 rest of run.
231700	1	2	start pol2 cycle
231908	1	2	on started 8 seconds late
232000	1	2	start changing the tx power levels (1)
232430	0	2	finish changing power levels, tx off.
232500	1	2	start 30 sec cycle with new power levels
233916	1	2	last sec before daeron reboot (2)
235124	1	2	first second after daeron reboot and fix clock cable (2) files: t1193_20150619b
235200	1	2	back to 30 sec cycle.
235520	1	1	fixed loose cable on T for channel 1. still cycling
235800	1	1	stopped cycling. remain on for final 2 minutes.

We started changing the transmitted power levels at 232000. We finished the change at 232430. The table below shows the power levels before and after

We noticed that the transmitted power prior to the change had dropped by .5 to 1db (especially tx6)

the clock cable to daeron was loose. The clock stopped going to daeron at 23:39:16. We rebooted daeron, and then found the loose clock cable at 23:51:24. The hf transmitters continued to cycle during this period.

I made a movie of the decoded data: linux (.avi) quicktime (.mov):

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