Agilent Technologies N1911A Manual do Utilizador descarregar pdf (Página 3)

P-Series Power Meter and Sensor

Key System Specifications and Characteristics

Maximum sampling rate 100 Msamples/sec, continuous sampling

Video bandwidth ≥ 30 MHz

Single shot bandwidth ≥ 30 MHz

Rise time and fall time ≤ 13 ns (for frequencies ≥ 500 MHz)

see Figure 1

Minimum pulse width 50 ns

Overshoot ≤ 5 %

Average power measurement accuracy N1921A: ≤ ± 0.2 dB or ± 4.5 %

N1922A: ≤ ± 0.3 dB or ± 6.7 %

Dynamic range –35 dBm to +20 dBm (> 500 MHz)

–30 dBm to +20 dBm (50 MHz to 500 MHz)

Maximum capture length 1 second

Maximum pulse repetition rate 10 MHz (based on 10 samples per period)

Figure 1. Measured rise time percentage error versus signal under test rise time

Although the rise time specification is ≤ 13 ns, this does not mean that the P-Series

meter and sensor combination can accurately measure a signal with a known rise time

of 13 ns. The measured rise time is the root sum of the squares (RSS) of the signal

under test rise time and the system rise time (13 ns):

Measured rise time = √ ((signal under test rise time)

+ (system rise time)

and the % error is:

% Error = ((measured rise time – signal under test rise time)/signal under test

rise time) x 100

2. See Appendix A on page 9 for measurement uncertainty calculations.

3. Specification applies only when the Off video bandwidth is selected.

4. The Minimum Pulse Width is the recommended minimum pulse width

viewable on the power meter, where power measurements are

meaningful and accurate, but not warranted.

5. Specification is valid over –15 to +20 dBm, and a frequency range 0.5 to

10 GHz, DUT Max. SWR < 1.27 for the N1921A, and a frequency range

0.5 to 40 GHz, DUT Max. SWR < 1.2 for the N1922A. Averaging set to 32,

in Free Run mode.

Signal under test rise time (nS)

Percent error

15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

1 2 3 4 5 6 7 8 ... 11 12

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