Agilent Technologies VXI E1439 - Manual (Page 62)

52
Using the Agilent E1439
Fiber Optic Interface
The following shows two E1439D modules in an append chain transmitting data to a fiber
receiver when flow control is on.
Fiber TX Fiber RX
VME BUS
LBUS
ADC
DIGITAL
FILTERS
FIFO
Fiber TX Fiber RX
VME BUS
LBUS
ADC
DIGITAL
FILTERS
FIFO
Fiber
TX
Fiber
RX
Processing
DATA
E1438D / E1439D Fiber Receiver E1438D / E1439D
1 KB
FIFO
1 KB
FIFO
1 KB
FIFO
Fiber Interface Setup
First E1439D in chain Next E1439D in chain
Mode Generate Mode Append
Rate 106 or 250 MBs Rate same as module to left
BOF ON BOF
ON 1
1. The final module in an append chain may require BOF to be Off for compat-
ibility with data receivers that cannot process BOFs.
CRC ON CRC ON
Flow Control Copy Flow Control
No Copy 2
2. Set intermediate modules to Copy and the last module to No Copy.
Epoch Generate ON Epoch Generate ON
Epoch Size Divisible by 4; must match blocksize Epoch Size Divisible by 4; must match blocksize