Agilent Technologies E8267D PSG Manual de usuario descargar pdf (Pagina 7)

1. The step attenuator provides coarse power attenuation to achieve low power levels. Fine power level adjustment is provided by the ALC (automatic level control)

within the attenuator hold range.

2. To within 0.1 dB of ﬁnal amplitude within one attenuator range.

3. To within 0.5 dB of ﬁnal amplitude within one attenuator range. Add up to 50 ms when using power search.

4. Speciﬁcations apply in CW and list/step sweep modes over the 15 to 35 ºC temperature range, with attenuator hold off (normal operating mode). Degradation

outside this range, for ALC power levels > –5 dBm and frequency > 10 MHz, is typically < 0.3 dB. In ramp sweep mode (with Option 007), speciﬁcations are

typical. For instruments with type-N connectors (Option 1ED), speciﬁcations apply only up to 18 GHz and typical level accuracy degrades by 0.2 dB above 18 GHz.

Speciﬁcations do not apply above the maximum speciﬁed power.

5. For Option 520, measured with symbol rate > 10 kHz and power ≤ –1 dBm. For Options 532 and 544, measured with symbol rate > 10 kHz and power ≤ –3 dBm.

6. Relative to ALC on, after power search is executed. When applying external I/Q signals with ALC off, output level will vary directly with I/Q input level.

Step attenuator

0 to 115 dB in 5 dB steps

Attenuator hold range

Minimum From –15 dBm to maximum speciﬁed output power with step attenuator in 0 dB position; can

be offset using step attenuator

Amplitude switching speed

ALC on < 6 ms (typ)

ALC off < 10 ms (typ) (not including power search)

Level accuracy

(dB) > +10 dBm +10 to –10 dBm < –10 to –70 dBm < –70 to –90 dBm

250 kHz to 2 GHz ±0.6 ±0.6 ±0.7 ±0.8

> 2 to 20 GHz ±0.8 ±0.8 ±0.9 ±1.0

> 20 to 32 GHz ±1.0 ±0.9 ±1.0 ±1.7

> 32 to 44 GHz ±1.0 ±0.9 ±1.5 ±2.0

CW level accuracy with I/Q modulation (With PRBS modulated data) (relative to CW)

With ALC on

QAM or QPSK formats

±0.2 dB

Constant-amplitude formats (FSK, GMSK, etc) ±0.2 dB

With ALC off

±0.2 dB (typ)

0 5 10 15 20

Frequency (GHz)

Option 520 level accuracy at -110 dBm (measured)

Error (dB)

0.4

0.3

0.2

0.1

-0.1

-0.3

-0.4

-0.5

0 4 8 12 16 20 24 28 32 36 40 44

Frequency (GHz)

Option 544 level accuracy at -110 dBm (measured)

Error (dB)

0.4

0.3

0.2

0.1

-0.1

-0.3

-0.4

-0.5

Level accuracy (measured)

1 2 3 4 5 6 7 8 9 10 11 12 ... 33 34

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Agilent Technologies E8267D PSG Manual de usuario Pagina 7

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