Help with this pulse stream encoding

[Back2Volts]

I am trying to reverse engineer the transmission of an RF  remote control for a sprinkler station.  I have setup an RCR-315-RP receiver http://www.mouser.com/ds/2/238/rcr-rp_um-8864.pdf on a breadboard with a couple of trimmers to adjust the levels of the analog and digital outputs.   Both outputs go to the scope and to a cheap LA with SIGROK.   I use the remote control to turn a given valve# on (for a time preset in the remote) or off.   

I have captured the transmissions with PulseView, and I am a bit puzzled with the results.   A command results in

- Six pulse trains, which at first sight appear identical, separated by 220 milliseconds LOW.
- The trains have a fix number of pulses.   
- There are three distinct pulse shapes.   
- Pulses start with a HI for 1 millisecond, followed by LO for 6, 10 or 14 milliseconds. ( Referred below as A,B,C )
   
I have attached a screen shot of PulseView.  Here are the sequences for zones 1, 2, 3, 4, 8, for 1 minute, ON and OFF:

Z1 ON:   ABBBBBBBBBBBCABBCABBBBCABBC
Z2 ON:   ABBBBBBBBBBCABBBCABBBCABBBC
Z3 ON:   ABBBBBBBBBBCBABBCABBBCBABBC
Z4 ON:   ABBBBBBBBBCABBBBCABBCABBBBC
Z8 ON:   ABBBBBBBBCABBBBBCABCABBBBBC

Z1 OFF:  ABBBBBBBBBBBCABBBBBBBBCABBB 
Z2 OFF:  ABBBBBBBBBBCABBBBBBBBCABBBB
Z3 OFF:  ABBBBBBBBBBCBABBBBBBBCBABBB
Z4 OFF:  ABBBBBBBBBCABBBBBBBBCABBBBB
Z8 OFF:  ABBBBBBBBCABBBBBBBBCABBBBBB


I know very little about ASK, but I don't think this is it because of the long LOW segments.   I do not see how the underlying clock could be 1KHz, but I may be missing something.

I would appreciate any tips to proceed or insights on what encoding protocol this might be.