National Instruments NI 6238 - Manual (Page 26)

Chapter 3 Connector Information
© National Instruments Corporation 3-3 NI 6238/6239 User Manual
RTSI Connector Pinout
Refer to the RTSI Connector Pinout section of Chapter 10, Digital Routing
and Clock Generation , for information on the RTSI connector.
CAL+ — — External Calibration Positive Reference—CAL+ supplies
the positive reference during external calibration of the NI
6238/6239.
CAL– — — External Calibration Negative Reference—CAL– supplies
the negative reference during external calibration of the NI
6238/6239.
Table 3-1. I/O Connector Signals (Continued)
Signal Name Reference Direction Description