Hello Time-Nuts: Has anyone used a Endace TDS 24 unit before? I have someone who has one but we have no user manual. Any pointers? And what is IRIG-B output suppose to look like...this unit seems to give off two distinct outputs....one is a 3.3V to 1.5V sweep, the other is just a 3.3V pulse (I assume that 1PPS). Thanks! -aps