Glossary

anti-alias filter

An analog low pass filter inserted the signal path to eliminate

 

undesirable frequency components which appear under the alias

 

of another (baseband) frequency. For more information, see

 

Spectrum and Network Measurements available through your

 

Agilent Technologies Sales Office.

baseband

A band in the frequency spectrum that begins at zero. In contrast

 

a zoomed band is centered on a specific center frequency.

block mode

A mode in which the Agilent E1439 stops taking data as soon as a

 

block of data has been collected.

block size

The number of sample points in a block of data. For complex

 

data, block size is the number of complex data pairs per data

 

block.

BOF

A fiber frame that acts as a synchronizing event.

continuous mode

A mode in which the Agilent E1439 collects data continuously. It

 

does not stop taking data unless the FIFO overflows.

data frames

A fiber frame that contains 0 to 512 32-bit data words.

decimation filter

A digital filter that simultaneously decreases the bandwidth of the

 

signal and decreases the sample rate. The digital filter provides

 

alias protection and increases frequency resolution. For more

 

information, see Spectrum and Network Measurements available

 

through your Agilent Technologies Sales Office.

EOE

A fiber frame that contains the last 4 data bytes in an epoch.

epoch

One or more data frame followed by an EOE.

fiber frame

A series of 32-bit values that can either be data or an ordered set.

FIFO

A First In, First Out buffer and controller used to transmit data.

FPDP

Front panel data port.

LO

Local oscillator

VCXO

Voltage controlled crystal oscillator

zoom

Selects a frequency span around a specified center frequency. This

 

is also known as band selectable operation.

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Agilent Technologies E1439 manual Agilent Technologies Sales Office, Fiber frame that acts as a synchronizing event