User guide

152 RealCT Direct API Developer Guide
Chapter 5: MVIP-90
Setting up the System
The following examples show how to set the MVIP clock for
common scenarios:
If you have a system with a T1, an RTNI-ATSI, one
Vantage VPS, and one Vantage VRS, you would set the
clock in the following order:
a. Set the T1 board to set the MVIP clock based on the first
network trunk and to retrieve the SEC8K signal as a
backup:
CLOCK_REF_NET1 | SEC8K_NOT_DRIVEN
(use the RHT_SET_CLOCK function)
b. Set the RTNI-ATSI board to retrieve the clock from the
MVIP bus and to drive the SEC8K clock based on its
internal oscillator:
CLOCK_REF_MVIP | SEC8K_DRIVEN_BY_OSC
(use the RHT_SET_CLOCK function)
c. Set the Vantage VPS board to take the clock from the
MVIP bus:
CLOCK_REF_MVIP
(use the RHT_SET_CLOCK function)
d. There is no need to set the Vantage VRS board clock
If you have a single T1 or E1 board used in loopback mode
(trunk A connected to trunk B)
CLOCK_REF_OSC | SEC8K_NOT_DRIVEN
(use the RHT_SET_CLOCK function)