It surprised both the First Officer and me that there were no other conditions, in order to operate 1,000' from aircraft at all altitudes. The RVSM is fairly new for us, and requires the digital altimeters and the large clean areas around static ports etc, but TCAS has been around many more years.
Does it seem like there is a contradiction here somewhere? Why would TCAS not be required to be operative, when we had no restrictions except for prohibiting PRM approaches?
I think you're muddling TCAS and RVSM as "associated technologies/procedures". Operating 1000' apart and 2000' apart are equally safe TCAS wise... The TCAS is there to save you when you are operating 0' apart
TCAS "caused" RVSM problems initially, since 2 aircraft 1000' apart, but slightly wobbling, would give off TAs - quite startling mid-Atlantic with an overtaker from behind
Now corrected in a software change...