Port Timing - Ultra electronics VersaMux-4000 Operations & Installation Manual

Planning the Timing

Port Timing

Figure 4-22
Figure 4-23
Page 4-18
The VersaMux-4000 can also accept timing from one of its (non-aggregate) ports.
This section describes using Port Timing on the VersaMux-4000.
Port Timing, VersaMux = DTE
Figure 4-22 shows the DTE mode VersaMux-4000 recovering its master clock from
one of its ports. With the TxClkSrc parameter set to TxClkIn, the VersaMux uses
the Tx Clock signal from the DCE (Transmit Signal Element Timing- DCE Source) to
clock the Transmitted Data out to the DCE. It also returns this signal to the DCE as
the DTE Tx Clock (Transmit Signal Element Timing- DTE Source). Note that the
VersaMux uses the DCE Rx Clock (Receiver Signal Element Timing- DCE Source) to
clock in the Received Data from the DCE. Typically the DCE would use the same
source as the VersaMux Port to generate its system reference.
ClkRef = Port (Port-1, Port-2, Port-3, Port-4)
Port Interfaces
Primary
Reference Source
(PRS)
VersaMux-4000, DTE Mode, Port Timing, TxClkSrc = TxClkIn
Figure 4-23 is similar to Figure 4-22
to System, the VersaMux uses its system reference to clock the Transmitted Data
out to the DCE and sends this signal to the DCE as the DTE Tx Clock (Transmit
Signal Element Timing- DTE Source). Note that the VersaMux uses the DCE Rx
Clock (Receiver Signal Element Timing- DCE Source) to clock in the Received Data
from the DCE. Typically the DCE would use the VersaMux Tx Clock (DTE) to
generate its system reference.
ClkRef = Port (Port-1, Port-2, Port-3, Port-4)
Port Interfaces
Primary
Reference Source
(PRS)
VersaMux-4000, DTE Mode, Port Timing, TxClkSrc = System
VersaMux-4000 Operation & Installation Guide
VersaMux-4000 (DTE)
Mode = DTE
TxClkSrc = TxClkIn
ClkRef
except that with the TxClkSrc parameter set
VersaMux-4000 (DTE)
Mode = DTE
TxClkSrc = System
ClkRef
Chapter 4: Getting Started
DCE Device
(IE: Satellite
Modem)
NRZ Interface
Tx Clock (DCE)
Tx Clock (DTE)
Transmitted Data
Rx Clock (DCE)
Rx Data
DCE Device
(IE: Satellite
Modem)
NRZ Interface
Tx Clock (DCE)
Tx Clock (DTE)
Transmitted Data
Rx Clock (DCE)
Rx Data
Part No. 24001157
Revision C