N1955B Electrical Specifications and Characteristics

Definitions

All specifications and characteristics apply over a 25° C 5° C range (unless otherwise stated) and 90 minutes after the instrument has been turned on.

Specification (spec.)

Warranted performance. Specifications include guard bands to account for the expected statistical performance distribution, measurement uncertainties, and changes in performance due to environmental conditions.

Characteristic (char.)

A performance parameter that the product is expected to meet before it leaves the factory, but that is not verified in the field and is not covered by the product warranty. A characteristic includes the same guard bands as a specification.

Typical (typ.)

Expected performance of an average unit which does not include guard bands. It is not covered by the product warranty.

Nominal (nom.)

A general, descriptive term that does not imply a level of performance. It is not covered by the product warranty.

Calibration

The process of measuring known standards to characterize the system's systematic (repeatable) errors.

Corrected (residual)

Indicates performance after error correction (calibration). It is determined by the quality of calibration standards and how well "known" they are, plus system repeatability, stability, and noise.

Uncorrected (raw)

Indicates instrument performance without error correction. The uncorrected performance affects the stability of a calibration.

Configuration

The following specifications are applicable for a system in the following configurations:

Network Analyzer:

Keysight E8363B Options 014 and UNL

Test Set:

Keysight N4420B

Calibration Kit:

Keysight 85056A 2.4 mm

Test Port Cables:

Keysight N4420B Option B20

Calibration Technique:

Four-Port SOLT

System Dynamic Range

The test port transmission measurements are valid at 10 Hz IF bandwidth with four-port error correction and -5 dBm default maximum output power. The dynamic range is the difference between rms noise floor and the output power.

Table 1 System Dynamic Range

Frequency Range

Characteristics

10 MHz to 45 MHz

  55 dB

45 MHz to 500 MHz

55 dB

500 MHz to 10 GHz

70 dB

10 GHz to 20.0 GHz

70 dB

20.0 GHz to 40.0 GHz

55 dB

Measurement Port

Residual uncertainties for corrected data using four-port error correction. These apply for 25° C with less than 1° C variation from calibration.

Table 2 Measurement Port Characteristics

Description

Characteristic

45 MHz
to
2.0 GHz

2.0 GHz
to
10.0 GHz

10.0 GHz
to
20.0 GHz

20.0 GHz
to
40.0 GHz

Directivity

43 dB

39.5 dB

39 dB

33 dB

Source Match

38 dB

34 dB

34 dB

27 dB

Load Match

43 dB

39.5 dB

39 dB

33 dB

Reflection Tracking

± 0.001 dB

± 0.002 dB

± 0.008 dB.

± 0.026 dB

Transmission Tracking

± 0.015 dB

± 0.020 dB

± 0.040 dB

± 0.020 dB

Test Set Performance

Table 3 Test Set Performance

Description

Characteristics

Supplemental Information

Frequency Range

10 MHz to 40.0 GHz

 

Transition Time
(10 to 90%, TR=.72/BW)

18 ps

 

Impedance

 

50 Ohms (nom.)

Insertion Loss

 

 

Source Out to Coupler Thru  

12.0 dB maximum

 

Port 2 to Rcvr A In and
Port 4 to Rcvr B In

 

 

45 MHz to 1.0 GHz

 

18 to 45 dB (typical)

1.0 GHz to 40.0 GHz

 

16 to 26 dB (typical)

Rcvr A In to Cplr Arm and
Rcvr B In to Cplr Arm

15.0 dB maximum

 

Isolation (port to port)

 

 

45 MHz to 200 MHz

³ 70 dB

 

200 MHz to 20 GHz

³ 90 dB

 

Maximum Operating Level

+20 dBm

 

Damage Level

 

+30 dBm (typical)

Test Port Connectors

 

50 Ohms (nom.)
2.4 mm Connectors

Power Supply

The power supply requirements for the test sets are listed below.

Table 4 Test Set Power Supply Specifications

Description

Specification

Input Voltage Range

100 to 240 Volts

Frequency Range

47 to 63 Hertz

Power

40 VA

General Characteristics

The following are the test set environmental operating conditions and physical characteristics.

Environmental Operating Conditions

The environmental operating conditions for the test set are listed below.

Table 5 Test Set Environmental Operating Conditions

Description

Conditions

Operating Environment

Indoor use

Altitude

 

  Operating:  

0 to 2.0 km (6,560 ft)

  Storage:

0 to 15.24 km (50,000 ft)

Temperature

0 C to 40 C

Maximum Relative Humidity

80% for temperatures up to 31 C decreasing linearly to 50% for a temperature of 40 C

This product is designed for use in INSTALLATION CATEGORY II and POLLUTION DEGREE 2, per IED 61010-1 and 664, respectively.

Physical Characteristics

The weight and dimensions for the test sets are listed below.

Table 6 Test Set Weight and Dimensions

Model Number

Weight

Dimensions

Height (A)

Width (B)

Depth (C)

N4419B

9.0 kilograms
(19.9 pounds)

3.0 in
(7.62 cm)

16.75 in
(42.55 cm)

19.25 in
(48.90 cm)

N4420B and N4421B

9.0 kilograms
(19.9 pounds)

5.5 in
(13.97 cm)

16.75 in
(42.55 cm)

16.75 in
(42.55 cm)