Agilent Technologies ESG Guia do Utilizador descarregar pdf (Página 81)

Chapter 3 65

Basic Digital Operation

Arbitrary (ARB) Waveform Header Files

displayed alpha/symbol softkeys and the numeric keypad to

enter information such as describing the waveform’s function.

Sample Clock Rate This displays the ARB sample clock rate saved to the header.

Runtime Scaling This displays the Runtime scaling value that is saved to the

header. Runtime scaling is applied in real-time while the

waveform is playing. This setting can only be changed for files

in the dual ARB player.

Marker 1...4 Polarity This displays the marker polarity, positive or negative.

ALC Hold Routing This displays which marker, if any, will implement the ESG’s

ALC hold function. The ALC hold function holds the ALC

modulator at its current level when the marker signal is low.

When the marker signal goes high, the ALC hold function is

discontinued.

If the RF Blank Routing function is selected, it will

automatically activate the ALC hold for the same marker

number.

Alt Ampl. Routing This will display which marker, if any, will trigger the ESG’s

alternate amplitude feature when the marker signal is low.

When the marker signal goes high, the trigger is terminated

disengaging alternate amplitude. You still need to configure the

alternate amplitude parameters located in the

Amplitude

hardkey menu.

RF Blank Routing This will display which marker, if any, will implement the ESG’s

RF blanking function when the marker signal is low. RF

blanking also integrates ALC hold. So there is no need to select

the ALC Hold Routing for the same marker number when you

are using the RF Blank Routing function. When the marker

signal goes high, RF blanking is discontinued.

NOTE All waveforms generated in the ESG have a marker on the first sample point.

In order to see the desired results from the three routing selections, you may

need to select a range of sample (marker) points. Setting the marker points is

accomplished using the

Set Marker on Range of Points softkey located in the

Marker Utilities softkey menu. Refer to “Placing a Marker Across a Range of

Points within a Waveform” on page 92 for more information.

Mod Attenuation This displays the I/Q modulator attenuation setting saved to the

header.

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Agilent Technologies ESG Guia do Utilizador Página 81