Keysight Technologies 11590B Manuale di servizio

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Keysight

11590B

Bias Network

Operating and

Service Manual

Notices

©Keysight Technologies 1995 - 2015

No part of this manual may be reproduced

in any form or by any means (including

electronic storage and retrieval or transla-

tion into a foreign language) without prior

agreement and written consent from Key-

sight Technologies as governed by United

States and international copyright laws.

Manual Part Number

11590-90020

Edition

January 2015

Supersedes: January 1995, April 2014

Keysight Technologies

1400 Fountaingrove Parkway

Santa Rosa, CA 95403

Warranty

The material contained in this docu-

ment is provided “as is,” and is sub-

ject to being changed, without notice,

in future editions. Further, to the max-

imum extent permitted by applicable

law, Keysight disclaims all warran-

ties, either express or implied, with

regard to this manual and any infor-

mation contained herein, including but

not limited to the implied warran-ties

of merchantability and fitness for a

particular purpose. Keysight shall not

be liable for errors or for inciden-tal or

consequential damages in con-

nection with the furnishing, use, or

performance of this document or of

any information contained herein.

Should Keysight and the user have a

separate written agreement with

warranty terms covering the material

in this document that conflict with

these terms, the warranty terms in the

separate agreement shall control.

Technology Licenses

The hardware and/or software described in

this document are furnished under a

license and may be used or copied only in

accordance with the terms of such license.

Restricted Rights Legend

If software is for use in the performance of

a U.S. Government prime contract or sub-

contract, Software is delivered and

licensed as “Commercial computer soft-

ware” as defined in DFAR 252.227-7014

(June 1995), or as a “commercial item” as

defined in FAR 2.101(a) or as “Restricted

computer software” as defined in FAR

52.227-19 (June 1987) or any equivalent

agency regulation or contract clause. Use,

duplication or disclosure of Software is

subject to Keysight Technologies’ standard

commercial license terms, and non-DOD

Departments and Agencies of the U.S. Gov-

ernment will receive no greater than

Restricted Rights as defined in FAR

52.227-19(c)(1-2) (June 1987). U.S. Govern-

ment users will receive no greater than

Limited Rights as defined in FAR 52.227-14

(June 1987) or DFAR 252.227-7015 (b)(2)

(November 1995), as applicable in any

technical data.

Safety Notices

CAUTION

A CAUTION notice denotes a haz-

ard. It calls attention to an operat-

ing procedure, practice, or the like

that, if not correctly performed or

adhered to, could result in damage

to the product or loss of important

data. Do not proceed beyond a

CAUTION notice until the indicated

conditions are fully understood and

met.

WARNING

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the like that, if not correctly per-

formed or adhered to, could result

in personal injury or death. Do not

proceed beyond a WARNING

notice until the indicated condi-

tions are fully understood and met.

11590B Operating and Service Manual 1

11590B Bias Network

General Information

This Operating and Service Manual contains information required to install, operate and test the 11590B and

11590B Option 001 bias networks. The 11590B is equipped with Type-N female connectors and operates to

12.4 GHz. The 11590B Option 001 is equipped with precision 7 mm connectors and operates to 18.0 GHz.

Specifications

Instrument specifications are listed in Ta b l e 1 . These specifications are the performance standards or limits

against which the instrument is tested.

Table 1 Specifications

Electrical

Frequency Range

Standard 0.1 to 12.4 GHz

Option 001 0.1 to 18.0 GHz

Impedance 50 ohms nominal

Port Match (both ports); Minimum Return Loss

Standard

0.1 to 1.0 GHz 16 dB

1.0 to 12.4 GHz 19 dB

Option 001

0.1 to 1.0 GHz 16 dB

1.0 to 12.4 GHz 19 dB

12.4 to 18.0 GHz 14 dB

Insertion Loss; Maximum

Standard

0.1 to 1.0 GHz 1.0 dB

1.0 to 12.4 GHz 0.8 dB

Option 001

0.1 to 1.0 GHz 1.0 dB

1.0 to 12.4 GHz 0.8 dB

12.4 to 18.0 GHz 1.2 dB

2 11590B Operating and Service Manual

Description

The 11590B bias network provides a means of supplying dc bias to the center conductor of a coaxial line and

thus to a biasable component or device (such as a transistor), while blocking the dc bias from the input RF

circuit.

A schematic diagram of the 11590B is shown is Figure 1. The capacitor in the RF input arm acts as a dc

block/high pass filter. The vertical arms are identical and act as bias/bias sense arms. Because the

BIAS/BIAS SENSING port draws no current (it is connected to a high impedance voltmeter), the voltage

measured is identical to the voltage at the RF and Bias Output. To double the maximum current handling

capability, both BIAS/BIAS SENSING ports may be used for bias input.

A vertical arm is comprised of a series inductance and shunt capacitance which act together as a low pass

filter. The ferrite beads and R-C filter decouple the power supply from the RF section and help to reduce the

possibility of inductance related oscillation.

Maximum Bias Voltage 100 Vdc

Maximum Bias Current

(each bias port)

500 mA

DC Resistance from Bias

Port to Output Port at 23 °C

(typical)

3.0 ohms

General

Operating Temperature 0 to 55°C

RF Connectors (non-hermetic)

Standard Type-N female

Option 001 Precision 7 mm

Bias Connector

(non-hermetic)

BNC female

Net Weight 0.30 kg (0.7 lbs)

Dimensions

In millimeters 54 x 51 x 28

In inches 2.2 x 2 x 2.1

Table 1 Specifications

11590B Operating and Service Manual 3

Figure 1 Schematic Diagram

Installation

Initial Inspection

Inspect the shipping container for damage. If the shipping container or cushioning material is damaged, it

should be kept until the contents of the shipment have been checked for completeness and the instrument

has been checked mechanically and electrically. Procedures for checking electrical performance are given

under “PERFORMANCE TESTS”. If the contents are incomplete, if there is mechanical damage or defect, or

if the 11509B bias network does not pass the Performance Tests, notify Keysight Technologies –

see“Contacting Keysight” on page 8. If the shipping container is damaged, or the cushioning material shows

signs of stress, notify the carrier as well as Keysight. Keep the shipping materials for the carrier’s inspection.

The Keysight office will arrange for repair or replacement at Keysight’s option without waiting for claim

settlement.

Preparation For Use

Interconnections The 11590B bias network is connected in line with the device to be biased. The bias is

applied through either BIAS/BIAS SENSING port, and is sensed through the other BIAS/BIAS SENSING

port.

Mating Connectors The mating connectors for Type-N connectors are the opposite gender Type-N

connectors. Precision 7 mm connectors (Option 001) are genderless.

4 11590B Operating and Service Manual

Operating Environment

The instrument may be operated in environments within the following limits:

The instrument should be protected from temperature and humidity conditions which cause condensation

within the instrument.

Storage and Shipment

The instrument may be stored in environments within the following limits:

The instrument should be protected from temperature and humidity conditions which cause condensation

within the instrument.

Packaging

Tagging for Service If the instrument is being returned to Keysight for service, attach a tag indicating the

type of service required, return address, and model number. See“Contacting Keysight” on page 8.

Original Packaging Containers and materials identical to those used in factory packaging are available

through Keysight offices. Mark the container FRAGILE to ensure careful handling.

Other Packaging The following general instructions should be used for re-packing with commercially

available materials:

1. Wrap the instrument in heavy paper or plastic (If shipping to a Keysight office or service center, attach a

tag as explained previously).

2. Use a strong shipping container.

3. Use a thick layer of shock absorbing material 70 to 100 mm (3 to 4 inches) thick around all sides of the

instrument to provide firm cushioning and prevent movement inside the container.

4. Seal the shipping container securely.

5. Mark the shipping container FRAGILE to ensure careful handling.

6. In any correspondence, refer to the instrument by model number and full serial number.

Temperature 0° to +55°C

Humidity Up to 95%

Altitude Up to 7625 meters

(25,000 feet)

Temperature –40°C to +75°C

Humidity Up to 95%

Altitude Up to 7625 meters

(25,000 feet)

11590B Operating and Service Manual 5

Operation

Operating Instructions

Figure 2 shows the Keysight 11590B bias network connected in a typical measurement setup. Many other

applications are possible but not shown because the general method of setup and operation is the same.

The 11590B contains an in-line filter which will help prevent inductance related oscillations. However, to

eliminate the possibility of oscillation with bipolar transistors, it is recommended that the 11635A bias

decoupling network be used with the 11590B.

Figure 2 Typical Measurement Setup

Performance Tests

The procedures in this section tests the electrical performance of the 11590B using the specifications of

Ta b l e 1 as performance standards.

Test Record

Results of the performance tests may be tabulated on the Test Record at the end of the procedures.

Performance may be verified using either a vector or scalar network analyzer setup. Errors due to directivity,

source match, and return loss of the “opposite port” termination (and detector match in a scalar system) will

add uncertainties to your measurement. The most accurate method uses an error corrected instrument.

However, a scalar system will give acceptable results depending on the quality of the components.

The following general instructions apply to both vector and scalar network analyzers.

Return Loss Of Input and Output Ports (Port Match)

1. Connect the equipment for a standard reflection measurement.

2. Calibrate the system with the appropriate standards.

3. Connect the appropriate instrument port of the 11590B to the test port. Terminate the opposite port of

the 11590B with a 50 ohm load.

6 11590B Operating and Service Manual

NOTE The Return Loss of the load should be at least 20 dB better than the desired measurement

value.

4. Measure the port match. The specifications are as follows:

Insertion Loss

1. Connect the equipment for a standard insertion loss measurement.

2. Calibrate the system with a through line.

3. Replace the through line with the 11590B.

4. Measure the insertion loss. The specifications are as follows:

Adjustments

There are no mechanical or electrical adjustments on the 11590B bias network.

Port Match (both ports) – Minimum Return Loss

Standard

0.1 to 1.0 GHz 16 dB

1.0 to 12.4 GHz 19 dB

Option 001

0.1 to 1.0 GHz 16 dB

1.0 to 12.4 GHz 19 dB

12.4 to 18.0 GHz 14 dB

Insertion Loss – Maximum

Standard

0.1 to 1.0 GHz 1.0 dB

1.0 to 12.4 GHz 0.8 dB

Option 001

0.1 to 1.0 GHz 1.0 dB

1.0 to 12.4 GHz 0.8 dB

12.4 to 18.0 GHz 1.2 dB

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