Agilent Technologies U2000 Series Manual do Utilizador descarregar pdf (Página 10)

Specifications (continued)

1. This accuracy is essentially a combination of linearity, instrumentation accuracy, and traceability to absolute accuracy

at 50 MHz, 0 dBm. Note: Mismatch uncertainty, calibration factor uncertainty, and power level dependent terms (zero

set, drift, and noise) are excluded in this specification and specified elsewhere in the data sheet.

2. It is advisable to perform external zeroing on the U2000 Series power sensor for power measurement level below

–30 dBm. During the external zeroing process, the RF input signal must be switched off or the device-under-test

disconnected from the U2000 Series power sensor.

Switching point

The U2000 Series power sensors have two measurement paths: a low power path and a high power path, as shown in the table below.

Models

U2000/1/2/4A

U2000/1/2H

U2000/1B

AUTO (default) range

–60 dBm to +20 dBm

–50 dBm to +30 dBm

–30 dBm to +44 dBm

Low power path

–60 dBm to –10 dBm

–50 dBm to 0 dBm

–30 dBm to +20 dBm

High power path

–10 dBm to +20 dBm

0 dBm to +30 dBm

+20 dBm to +44 dBm

Switching point

–10 dBm

0 dBm

+20 dBm

Each power sensor automatically selects the

proper power level path. To avoid unnecessary

switching when the power level is close to

the switching point, switching point hysteresis

has been added.

Offset at switching point:

±0.5% ( ±0.02

dB) typical

Switching point hysteresis: 1 dB typical

Example with U2000 “A” suffix sensors:

Switching point for the U2000/1/2/4A sensors

is at –10 dBm. Hysteresis causes the low

power path to remain selected until

approximately –9 dBm as the power level is

increased. Above this power, the high power

path is selected. The high power path remains

selected until approximately –11 dBm is

reached as the signal level decreases. Below

this power, the low power path is selected.

Power Accuracy

Model

U2000/1/2/4A

U2000/1/2H

U2000/1B

Power range

–60 dBm to +20 dBm

–50 dBm to +30 dBm

–30 dBm to +44 dBm

Accuracy

(25 °C ± 10 °C)

±3.0%

±4.0%

±3.5%

Accuracy

(0 °C to 55 °C)

±3.5%

±5.0%

±4.0%

Specifications valid with the following conditions:

After zeroing

Number of averages = 1024

After 30 minutes of power-on warm-up

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 20 21

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