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HP 8590 E & L Series Spectrum Analyzers and HP 8591C Cable TV ...

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PREAMPG<br />

External Preamplifier Gain<br />

PRJZAMPG External Preamplifier Gain<br />

Subtracts a positive or negative preamplifier gain value from the displayed signal.<br />

Syntax<br />

Example<br />

OUTPUT 718; “PREAMPG IODB; ”<br />

Description<br />

7 amplitude value 7<br />

Unlike using ROFFSET, PREAMPG can change the attenuation depending on the preamplifier<br />

gain entered.<br />

XPREAMPC<br />

A preamplifier gain offset is used for measurements that require an external preamplifier or<br />

long cables. The offset is subtracted from the amplitude readout so that the displayed signal<br />

level represents the signal level at the input of the preamplifier or long cable. The preamplifier<br />

gain offset is displayed at the top of the screen <strong>and</strong> is removed by entering zero.<br />

Note PREAMPG is not reset to 0 by an instrument preset (IP). Be sure to execute<br />

“PREAMPG 0; ” when the preamplifier gain is no longer needed.<br />

Press CAL STClRE if you want the spectrum analyzer to use the current preamplifier gain offset<br />

when power is turned on. Preamplifier gain offset is set to zero by DEFAULT CONFIG .<br />

Query Response<br />

Programming Comm<strong>and</strong>s 5-445

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