Atec Agilent-N1921A User Manual

Agilent N1911A/N1912A P-Series Power Meters and N1921A/N1922A Wideband Power Sensors

Data Sheet

LXI Class-C-Compliant Power Meter

A P-Series power meter is a LXI Class-C-compliant instrument, developed using LXI Technology. LXI, an acronym for LAN eXtension for Instrumentation, is an instrument standard for devices that use the Ethernet (LAN) as their primary communication interface.

Hence, it is an easy-to-use instrument especially with the usage of an integrated Web browser that provides a convenient way to configure the instrument’s functionality.

Specification definitions

There are two types of product specifications:

• Warranted specifications are specifications which are covered by the product warranty and apply over a range of 0 to 55 ºC unless otherwise noted. Warranted specifications include measurement uncertainty calculated with a 95 % confidence.

Characteristic information is representative of the product. In many cases, it may also be supplemental to a warranted specification. Characteristic specifications are not verified on all units. There are several types of characteristic specifications. They can be divided into two groups:

One group of characteristic types describes ‘attributes’ common to all products of a given model or option. Examples of characteristics that describe ‘attributes’ are the product weight and ‘50-ohm input Type-N connector’. In these examples, product weight is an ‘approximate’ value and a 50-ohm input is ‘nominal’.

8.5 inch

These two terms are most widely used when describing a product’s ‘attributes’.

Conditions

The power meter and sensor will meet its specifications when:

• stored for a minimum of two hours at a stable temperature within the operating temperature range, and turned on for at least 30 minutes

• the power meter and sensor are within their recommended calibration period, and

• used in accordance to the information provided in the User’s Guide.

13.7 inch

3.5 inch

• Characteristic specifications are specifications that are not warranted. They describe product performance that is useful in the application of the product. These characteristic specifications are

Physical dimensions

(does not include bumper)

shown in italics.

General features

Number of channels N1911A P-Series power meter, single channel

N1912A P-Series power meter, dual channel

Frequency range N1921A P-Series wideband power sensor, 50 MHz to 18 GHz

N1922A P-Series wideband power sensor, 50 MHz to 40 GHz

Measurements Average, peak and peak-to-average ratio power measurements are provided with free-run or time-gated

definitions. Time parameter measurements of pulse rise time, fall time, pulse width, time-to-positive occurrence and time-to-negative occurrence are also provided.

Sensor compatibility P-Series power meters are compatible with all Agilent P-Series wideband power sensors, E-Series sensors,

8480 Series sensors and N8480 Series sensors be available free-of-charge in firmware release Ax.03.01 and above. Compatibility with N8480 Series power sensors will be available free-of-charge in firmware release A.05.00 and above.

1. Information contained in this document refers to operations using P-Series sensors. For specifications relating to the use of 8480 and E-Series

sensors (except E9320A range), refer to publication number 5965-6382EN. For specification relating to the use of E932XA sensors, refer to publication number 5980-1469EN. For specifications relating to the use of N8480 Series sensors, refer to publication number 5989-9333EN. The E-Series, 8480 Series and N8480 Series power sensors require N1917A/ B/ C cables when connected to the P-Series power meters.

. Compatibility with the 8480 and E-Series power sensors will

P-Series Power Meter and Sensor

Key system specifications and characteristics

Maximum sampling rate Video bandwidth Single-shot bandwidth Rise time and fall time ≤ 13 ns (for frequencies ≥ 500 MHz) Minimum pulse width Overshoot Average power measurement accuracy N1921A: ≤ ± 0.2 dB or ± 4.5 %

100 Msamples/sec, continuous sampling

≥ 30 MHz

50 ns

≤ 5 %

, see Figure 1

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 Maximum pulse repetition rate

1 second

10 MHz (based on 10 samples per period)

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

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

3. 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.

4. Specification is valid over a range of –15 to +20 dBm, and a frequency range of 0.5 to 10 GHz, DUT Max. SWR < 1.27 for the N1921A, and a

frequency range of 0.5 to 40 GHz, DUT Max. SWR < 1.2 for the N1922A. Averaging set to 32, in Free Run mode.

35 30 25 20 15

Percent error

5 0

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

Signal under test rise time (nS)

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)3 + (system rise time)3)

and the % error is:

% Error = ((measured rise time – signal under test rise time)/signal under test rise time) x 100

P-Series Power Meter Specifications

Meter uncertainty

Instrumentation linearity ± 0.8 %

Timebase

Timebase range Accuracy ±10 ppm Jitter

Trigger

Internal trigger

Range Resolution Level accuracy

Latency Jitter

External TTL trigger input

High Low

Latency Minimum trigger pulse width Minimum trigger repetition period Maximum trigger voltage input

Impedance Jitter

External TTL trigger output Low to high transition on trigger event

High Low

Latency Impedance Jitter

Trigger delay

Delay range Delay resolution

Trigger hold-off

Range Resolution

Trigger level threshold hysteresis

Range Resolution

1. Internal trigger latency is defined as the delay between the applied RF crossing the trigger level and the meter switching into the triggered state.

2. External trigger latency is defined as the delay between the applied trigger crossing the trigger level and the meter switching into the triggered state.

3. External trigger output latency is defined as the delay between the meter entering the triggered state and the output signal switching.

2 ns to 100 msec/div

≤ 1 ns

–20 to +20 dBm

0.1 dB

± 0.5 dB

160 ns ± 10 ns

≤ 5 ns rms

> 2.4 V

< 0.7 V

90 ns ± 10 ns

15 ns

50 ns

15 V emf from 50 Ω dc (current < 100 mA), or 60 V emf from 50 Ω (pulse width < 1 s, current < 100 mA)

50 Ω

≤ 5 ns rms

> 2.4 V

< 0.7 V

30 ns ± 10 ns

50 Ω

≤ 5 ns rms

± 1.0 s, maximum

1 % of delay setting, 10 ns maximum

1 μs to 400 ms

1 % of selected value (to a minimum of 10 ns)

± 3 dB

0.05 dB

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