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

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ACPE Adjacent Channel Power Extended<br />

10. If no error occurred, query trace A (TRA) for the trace results of the ACPE measurement.<br />

Variable<br />

or Trace<br />

1CPERR<br />

KPPWRTX<br />

LCPMAX<br />

LCPLOWER<br />

k?PUPPER<br />

‘RA<br />

ACPE Measurement Results<br />

Description<br />

A variable that indicates if setup errors occurred for the ACPE<br />

measurement. If ACPERR is 0, no errors occurred. If ACPERR is greater<br />

than 0, an error occurred. An ACPERR value of 1 to 7 Indicates that the<br />

frequency span, channel spacing, or the channel b<strong>and</strong>width are not set<br />

correctly. An ACPERR value of 1 to 7 indicates the following:<br />

1 Frequency span < (2 x channel spacing + channel b<strong>and</strong>width).<br />

2 Channel b<strong>and</strong>width > 2 x channel spacing.<br />

3 Frequency span < (2 x channel spacing + channel b<strong>and</strong>width) <strong>and</strong><br />

channel b<strong>and</strong>width > 2 x channel spacing.<br />

4 Channel b<strong>and</strong>width < frequency span/loo.<br />

5 Frequency span < (2 x channel spacing + channel b<strong>and</strong>width) <strong>and</strong><br />

channel b<strong>and</strong>width < frequency span/loo.<br />

6 Channel b<strong>and</strong>width > 2 x channel spacing <strong>and</strong> channel b<strong>and</strong>width <<br />

frequency span/loo.<br />

7 Frequency span < (2 x channel spacing + channel b<strong>and</strong>width), channe:<br />

b<strong>and</strong>width > 2 x channel spacing, <strong>and</strong> channel b<strong>and</strong>width < frequency<br />

span/loo.<br />

A variable that contains the total transmit b<strong>and</strong> carrier power. ACPPWRTX<br />

is calculated by the following:<br />

lo X ~o.!7(Po~eTCarrie~)<br />

A variable that contains the relative power level of the adjacent channel<br />

with the highest measured power level.<br />

A variable that contains the relative power level found in the lower<br />

adjacent channel. ACPLOWER is calculated by the following:<br />

~~~~%wer channel<br />

10 x log( 1<br />

POWCT carrier<br />

A variable that contains the relative power level found ln the upper<br />

adjacent channel. ACPUPPER is calculated by the following:<br />

POW.3 upper channel<br />

10 x log(<br />

Power<br />

1<br />

carrier<br />

IRA is trace A. Trace A contains the swept RF spectrum that was used to<br />

neasure adjacent channel power.<br />

Vane<br />

units<br />

determined by<br />

IUNITS comm<strong>and</strong><br />

default unit is dBm.<br />

1B<br />

1B<br />

iB<br />

determined by the<br />

race data format<br />

TDF) comm<strong>and</strong>.<br />

Restrictions<br />

Executing ACPE exits the following functions: windows display mode (WINON), N dB point<br />

measurement (NDBPNT), the FFT menu measurements (FFTAUTO, FFTCONTS, FFTSNGLS),<br />

gate utility functions (GDRVUTIL), TO1 measurement (TOI), marker table (MKTBL), peak table<br />

(PKTBL), percent AM (PCTAM), or peak zoom (PKZOOM).<br />

AUNITS of W or V, will give incorrect results for ACPMAX, ACPLOWER, <strong>and</strong> ACPUPPER.<br />

Programming Comm<strong>and</strong>s 5-39

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