Using the Agilent E1439

Fiber Optic Interface

Raw

The Raw fiber mode transmits raw (i.e., unprocessed, full bandwidth) ADC data over the fiber interface. At the same time that the raw data is transmitted over the fiber interface, filtered ADC data can be sent over the local bus (Agilent E1439D only) or read from the FIFO via the VME bus. After selecting Raw, optical data transmission starts at the trigger event and is not affected by trigger delays or data delays. The raw data transmission continues even after the measurement is complete. Changing the fiber mode stops data transmission. See the following illustration.

E1438D / E1439D

Fiber RX

ADC

DIGITAL

FILTERS

1 KB Fiber TX FIFO

FIFO

VME BUS

LBUS

Fiber Interface Setup

Fiber Mode

Raw

Rate

1061 or 250 MBs

BOF

Optional

CRC

ON2

Flow Control

Optional

Epoch Generate

Optional

Epoch Size

Divisible by 4

1.Only with external sam- ple. Internal sample gen- erates data too fast for this rate.

2.Some receivers may require CRC to be off for compatibility

Note

Setting the data port to Fiber while in the Raw fiber mode results in an invalid instrument state

 

because raw and filtered data cannot both be sent over the fiber interface at the same time.

 

 

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Agilent Technologies E1439 manual Raw