In certain applications, scientists may wish to collected implantable telemetry data synchronized with analog (hardwired) signals. This article details the current sync specification achieved when using the MX2 or CLC telemetry hardware with the ACQ-7700.
Telemetry Hardware with ACQ-7700
- When Network Time Protocol (NTP) is trained, we have confidence that sync will remain locked with no drift.
- NTP (Network Time Protocol) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.
- NTP typically takes 5-7 minutes to start after you restart or turn on a computer
- Ensure Windows automatic updates and anti-virus programs are disabled.
- A 10 minute “warm-up” period is recommended on isolated network to help facilitate NTP learning the clock
- Sync spec is independent of the number of MX2s or CLC's
- Hardware signal typically precedes telemetry signal
- Variation between MX2 and CLC jacks is typically less than 2 ms, and less than 1ms for acquisitions less than 1 hour.
- Follow the recommendations listed in the Ponemah Workstation Configuration IT Support Manual
To measure sync:
Feed a square wave or TTL pulse simultaneously via split cable into ABDC4 (ACQ-7700 signal conditioner) and adapted telemetry biopotential channel acquired via telemetry receiver and MX2/CLC. Acquire segment of data and perform Ponemah Review to determine delta time with digital caliper.