Chapter 4: Getting Started
Planning the Timing
Part No. 24001157
VersaMux-4000 Operation & Installation Guide
Page 4-15
Revision C
The configuration in
is similar to the one in
except that the
VersaMux-4000
TxClkSrc
parameter is set to
System
.
In this configuration, the VersaMux-4000 uses the Tx Clock DTE signal from the
DTE device (Transmit Signal Element Timing- DTE Source) as the source signal to
clock the Transmitted Data in from the DTE. In addition, the VersaMux-400 uses
this source to generate the Tx Clock DCE signal to the DTE (Transmit Signal
Element Timing- DCE Source).
Figure 4-17
VersaMux-4000 in DCE Mode, Aggregate Timing, TxClkSrc = System
External Clock
Input Timing
The VersaMux-4000 has an External Clock Input to accept timing from separate
timing sources such as a GPS or station clock. This section describes using the
External Clock Input on the VersaMux-4000.
External Input Timing, VersaMux = DTE
shows the VersaMux-4000 receiving the master clock via the External
Clock Input. In this example the VersaMux uses the Tx Clock signal from the DCE
(Transmit Signal Element Timing- DTE Source) to clock out the Transmitted Data to
the DCE. Typically the DCE would receive the PRS from the same external source as
the VersaMux. Note that the VersaMux uses the Rx Clock (Receiver Signal Element
Timing- DCE Source) to clock in the Receive Data.
Figure 4-18
VersaMux-4000, DTE Mode, External Clock, TxClkSrc = TxClkIn
DTE Device
(IE: Crypto)
ClkRef
NRZ Interface
Transmitted Data
Tx Clock (DCE)
Tx Clock (DTE)
Rx Clock (DCE)
Rx Data
Primary
Reference
Source (PRS)
VersaMux-4000 (DCE)
Mode = DCE
ClkRef = Aggregate
TxClkSrc = System
Port Interfaces
DCE Device
(IE: Satellite
Modem)
ClkRef
NRZ Interface
Transmitted Data
Tx Clock (DCE)
Tx Clock (DTE)
Rx Clock (DCE)
Rx Data
Primary Reference Source (PRS)
VersaMux-4000 (DTE)
Mode = DTE
ClkRef = Ext (1MHz, 5MHz, 10MHz)
TxClkSrc = TxClkIn
Port Interfaces
