Agilent Technologies 85025A Manual

User’s and Service Guide
Agilent Technologies
85025A/B/D/E
Detectors
Manufacturing Part Number: 85025-90063
Supersedes 85025-90014 & 85025-90031
Printed in USA
Print Date: January 2013
Supersedes September 2002
© Agilent Technologies, Inc. 1995, 2002, 2013

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change to product numbers and names has been in the company name prefix: where a product
number/name was HP XXXX the current name/number is now Agilent XXXX. For example,
model number HP 85109C is now model number Agilent 85109C.
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NOTE In any correspondence or telephone conversation, refer to the Agilent product by its model
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Safety Notes
The following safety notes are used throughout this manual. F
amiliarize
yourself with each of the notes and its meaning before operating this
instrument.
Caution
Caution denotes a hazard. It calls attention to a procedure
that, if not correctly performed or adhered to, would result in
damage to or destruction of the instrument. Do not proceed
beyond a caution sign until the indicated conditions are fully
understood and met.
L The instruction documentation symbol. The product is marked with
this symbol when it is necessary for the user to refer to the instructions in the
documentation.
How to Use This Guide
This guide uses the following conventions:
4
Front-Panel Key
5 This represents a key physically located on the instrument.
NNNNNNNNNNNNNNNNNNNNNNN
Softkey
This indicates a \softkey," a key whose label is determined by
the instrument's rmware.
Screen Text This indicates text displayed on the instrument's screen.
Docu entation Description
This manual contains information on operating, testing, and servicing the
Agilent 85025A/B/D/E detectors.
v

Contents
1. General Information
Product Description . . . . . . . . . . . . . . . . . . . . . . -
Specications and Supplemental Characteristics . . . . . . . . . -3
Operating Environment . . . . ....... . . . . . . . . . -9
Accessories ......................... -9
Storage and Shipment . ... . . . . . . . . . . . . . . . . . -9
Environment . .. . . . . . . . . . . . . . . . . . . . . . -9
Packaging ..........................- 0
Returning a Detector for Service . . . . . . . . . . . . . . . . - 0
2. Installation
Initial Inspection . . . . . . . . . . . . . . . . . . ... . . . 2-
Electrostatic Discharge (ESD) . . . . . . . . . . . . . . . . . . 2-2
Static-Safe Work Station . . . . . . . . . . . . . . . . . .. 2-2
Static-Safe Practices . . . . . . . . . . . . . . . . . . . .. 2-3
Power Requirements . . . . . . . . . . .. .. . . . . . . . . 2-3
Mating Connectors . . . . . . . . . ......... . . . . . 2-3
Connecting the Detector . . . . . . . . .... .. .. . . . . 2-3
3. Operation
Features . . . ......... . . . . . . . . . . . . . . . 3-2
Operating Theory . . . ......... . . . . . . . . . . . 3-2
Measurement System Conguration .. .. .. .. .. .. .. .3-3
DC Detection mode . .. .. .. .. .. .. .. .. .. .. 3-3
Accurate DC Measurements . ................. 3-3
Zeroing the Detector . . . . . . . . . . . . .... .. .. . 3-3
Autozero ......................... 3-3
Manual Zero . . . . . . . . . . . . . . .......... 3-4
AC Detection Measurements .... .. .. .. .. ...... 3-6
Operator's Check ...................... . 3-6
Procedure . .. .. .. .. .. .. .. .. .. . .. .. .. 3-7
If the Operator's Check Fails ................. 3-8
Agilent 85025A/B/D/E Contents-1

4. Performance Tests
Equipment Required . .... .. .. .. .. .. ...
..
.. 4-
Return Loss P
erformance Test ................ .4-3
85025A/B/D/E Return Loss Performance Test Procedure . . . . 4-3
Specications . . ................. .. .. 4-3
Description . . . . . . . . . . . . . . . ..
..
... . . 4-3
Return Loss Measurement . . . . . . . . . . . . . .... 4-6
Calibrating the Scalar Network Analyzer . . . . . . . . . . 4-7
Return Loss from 40 MHz to 8 GHz (to 26.5 GHz for 85025B/E
only, to 50 GHz for 85025D only) . . . . . . . . . . ...4-7
If This Test Fails . . . . . . . . . . . . . .... . . . . . . 4-9
Frequency Response Performance Test . . . . . . . . . . . . . 4-9
Description . . . . . . . . . . . . . . . . ....... . . 4-9
Equipment Required . . . . . . . . . . . . . . . ...... 4-
Equipment Common to 85025A/B/D/E . . . . . . . . . . . . 4-
Additional Test Equipment Required for 85025A . . . .... 4-
Additional Test Equipment Required for 85025A Option 00 .4-
Additional Test Equipment Required for 85025B . . . . . ...4-
Additional Test Equipment Required for 85025D Only . . . . 4-
Additional Test Equipment Required for 85025E Only . . . . 4- 2
Specications . . . . . . . . . . . . . ... . . . . . . . . 4- 3
85025A/B/D/E Frequency Response Performance Test Procedure 4- 3
Conguring the System . . . . ... . . . . . . . . . . . . 4- 3
Characterizing the Source . . . . ..... . . . . . . . . 4- 4
Characterizing the Detector . . . . .... . . . . . . . . 4- 4
Computing the Maximum Error . ......... . . . . . 4- 4
Power Accuracy Performance Test . . . . . . . . . . . . . . . 4- 5
Specications ..... . . . . . . . . . . . . . . . . . . . 4- 5
Description .... ..................... 4- 5
Equipment Required . .... . . . . . . . . . . . . . . . 4- 6
Procedure .... .. .. .. .. .. .. .. .. .. ....4- 7
Absolute Power Accuracy in DC Mode Performance Test . . . 4- 7
Dynamic Accuracy in AC Mode Performance Test .. .... . 4-20
Power Accuracy, Alternate Procedure Using an 8350B (+ 0 dBm
maximum) . . .... .. .. .. .. .. .. .. .. . .. 4-2
Alternate Equipment . ................... 4-2
Procedure . . . ....................... 4-22
Absolute Power Accuracy in DC Mode, Alternate Procedure .. 4-23
Dynamic Accuracy in AC Mode, Alternate Procedure . . . . . . 4-24
Performance Test Record . . . . . . . . . . .......... 4-25
Contents-2 Agilent 85025A/B/D/E

5. Adjustments
6. Replaceable P
arts
How To Order Parts Fast . . . . . . . . . . .. .. .. .. . . 6-
7. Service
Repair . . . . . . . . . . . . . . . .... .. .. .. . . . 7-2
Removing the Covers . . . . . . . . . . . . . ..
..
... 7-2
Procedure . . . . . . . . . . . . . . . ..
...... .. 7-2
Replacing the Detector . . . . . . . . . . . .... .. .. . 7-3
Replacing the Cable Assembly . . . . . . . . . . . . . . . . 7-3
Replacing the Connectors . . . . . . . . . . . . . . . . . . 7-5
8. Detector Maintenance
Mechanical Inspection . . . . . . . ......... . . . . . 8-
Inspecting the Connectors . . . . . . . . .... . . . . . . 8-
Visual Examination . . . . . . . . . ..... . . . . . . . 8-2
Cleaning the Connectors . . . . . . . . . . ... . . . . . . . 8-2
Connector Cleaning Kit . . . . . . . . . . ... . . . . . . 8-2
Gaging Connectors . . . . . . . . . . . . .. . . . . . . . . . 8-2
Gaging Connectors to be Mated with the 85025A/B/D/E . . . . 8-3
Type-N female . . . . . ... . . . . . . . . . . . . . . . 8-3
Precision 7 mm . . . . ... . . . . . . . . . . . . . . . 8-3
Precision 3.5 mm female . . . ..... . . . . . . . . . . 8-3
9. Automated Program Listing
Automating the Frequency Response Test . . . . . . . . . . . . 9-
Cal Factor Entry Program . . . . . . . . . . . . . . . . . . 9-2
Running the Cal Factor Entry Program . . . . . . . . . . . 9-2
Detector Frequency Response Program . ... . . . . . . . . 9-3
Running the Detector Frequency Response Program . . . . . 9-3
Measurement Setup . . . . . . . . . . . . .. .. .. .. .. 9-5
Example Programs . . . . . . . . . . . . ... . . . . . . . . 9-5
Index
Agilent 85025A/B/D/E Contents-3

Figures
- . 85025A/B/D/E Detector . . ................. -2
2- . Example of a Static-Safe W
ork Station . . . . . . . . . . . . 2-2
3- . Detector Features ..
. . . . . . . . . . . . . . . . . . . . 3-2
3-2. Typical System Setup for 0.0 to 50 GHz Measurements . . . . 3-5
3-3. Operator's Check Equipment Setup . ............. 3-7
4- . Setup for 85025A/B/D/E Return Loss Test ........... 4-6
4-2. 85025A/B/E Return Loss 0.04 GHz to Maximum Frequency . . . 4-8
4-3. Frequency Response Measurement Setup . ... . . . . . . . 4- 2
4-4. Absolute Power Accuracy Test Setup . . . . . . . . . . . . . 4- 7
4-5. Power Accuracy Alternate Test Setup . . . . . . . . . . . . . 4-22
6- . Module Exchange Program . . . . . . . . . . . . . . . . . . 6-3
7- . Removing the Detector Covers . . . . . . . . . . . . . . . . 7-2
7-2. Cable Connections . . . . . . . . . . . . . . . . . . . . . . 7-5
9- . Typical Program Output . . . . . . . . . . . . . . . . . . . 9-4
Contents-4 Agilent 85025A/B/D/E

Tables
- . 85025 Series Detector Descriptions . . . . . . . . . . . . . . -
-2. 85025A/B/D/E Detector General Specications . . . . . . . . . -3
-3. 85025A Detector Specications (including Option 00 ) . . . . . -4
-4. 85025B Detector Specications . . .... .. . . . . . . . . -5
-5. 85025D Detector Specications . . ....... . . . . . . . -6
-6. 85025E Detector Specications ... . . . . . . . . . . . . . -7
-7. 85025A/B/D/E Detector Supplemental Characteristics . . . . . -8
3- . Equipment Required for Operator's Check . . . . . . . . . . . 3-6
4- . Recommended Equipment . . . . . . . . . . . . . . . . . . 4-2
4-2. 85025A/B Return Loss with Measurement Uncertainty . . . . . 4-5
4-3. 85025D Return Loss with Measurement Uncertainty . . . . . . 4-5
4-4. 85025E Return Loss with Measurement Uncertainty . . . . . . 4-5
4-5. Approximate Error Analysis at 8 GHz for 85025A/B/E Detectors 4- 0
4-6. Approximate Error Analysis for the 85025D Detector . . . . . 4- 0
6- . 85025A/B/D/E Replaceable Parts and Accessories . . . . . . . 6-2
Agilent 85025A/B/D/E Contents-5

1
General Information
This manual contains information on operating, testing, and servicing the
Agilent 85025A/B/D/E detectors
. Figure - shows the detectors.
Product Description
The 85025A/B/D/E detectors are specically designed for use with Agilent 8757
series scalar network analyzers.
Table 1-1. 85025 Series Detector Descriptions
Detector onnector Type Frequency Range
85025A Type-N (m) .0 to 8 GHz
85025A Option 00 precision 7 mm .0 to 8 GHz
85025B precision 3.5 mm (m) .0 to 26.5 GHz
85025D precision 2.4 mm (m) .0 to 50 GHz
85025E precision 3.5 mm (m) .0 to 26.5 GHz
Agilent 85025A/B/D/E General Information 1-1

Figure 1-1. 85025A/B/D/E Detector
1-2 General Information Agilent 85025A/B/D/E

Specications and
Supple ental Characteristics
T
ables -2 through -6 list detector specications when used with an 8757
series scalar network analyzer. These specications represent the warranted
performance standards or limits against which you can test the device.
T
able -7 lists supplemental (typical, non-warranted) detector characteristics,
when used with one of the above-mentioned analyzers
.
Note
Specications describe the instrument's warranted performance
over the temperature range of 25

C, 6 5

C.
Table 1-2. 85025A/B/D/E Detector General Specications
Dynamic Range (on all 8757 Series analyzer's detector inputs):
AC mode +16 to 0 55 dBm
DC mode +16 to 0 50 dBm
Nominal Impedance 50
Maximum Input Power +20 dBm (100 mW), 6 10 VDC
Agilent 85025A/B/D/E General Information 1-3

Table 1-3.
85025A Detector Specications (including Option 001)
Frequency Range 0.01 to 18 GHz
Return Loss
:
10 MHz to 40 MHz 10 dB
40 MHz to 4 GHz 20 dB
4GHzto 18 GHz 17 dB
Frequency Response (in DC mode, input power 0 10 dBm):
10 MHz to 40 MHz +0.25 dB/ 0 0.75 dB
40 MHz to 18 GHz 6 0.5 dB
Absolute Power A
ccuracy (in DC mode, 50 MHz, calibrated at 0dBm)
Dynamic Power Accuracy
1-4 General Information Agilent 85025A/B/D/E

Table 1-4. 85025B Detector Specications
Frequency Range 0.01 to 26.5 GHz
Return Loss
:
10 MHz to 40 MHz 10 dB
40 MHz to 4 GHz 20 dB
4GHz to 18 GHz 17 dB
18 GHz to 26.5 GHz 12 dB
Frequency Response (in DC mode, input power
0 10 dBm):
10 MHz to 40 MHz +0.25 dB/
0 0.75 dB
40 MHz to 18 GHz
6
0.5 dB
Absolute Power Accuracy (in DC mode, 50 MHz, calibrated at 0 dBm)
Dynamic Power Accuracy
Agilent 85025A/B/D/E General Information 1-5

Table 1-5. 85025D Detector Specications
Frequency Range 0.01 to 50 GHz
Return Loss
:
10 MHz to 40 MHz 10 dB
40 MHz to 100 MHz 20 dB
100 MHz to 14 GHz 23 dB
14 GHz to 34 GHz 20 dB
34 GHz to 40 GHz 15 dB
40 GHz to 50 GHz 9 dB
Frequency Response (in DC mode, input power
0 10 dBm):
10 MHz to 40 MHz +0.25 dB/
0 0.75 dB
40 MHz to 20 GHz
6 0.5 dB
20 GHz to 26.5 GHz +1/ 0 0.5 dB
26.5 GHz to 40 GHz +2.5/ 0 0.5 dB
40 GHz to 50 GHz +3.0/ 0 0.5 dB
Absolute Power Accuracy (in DC mode, 50 MHz, calibrated at 0 dBm)
Dynamic Power Accuracy
1-6 General Information Agilent 85025A/B/D/E

Table 1-6. 85025E Detector Specications
Frequency Range 0.01 to 26.5 GHz
Return Loss
:
10 MHz to 40 MHz 10 dB
40 MHz to 100 MHz 20 dB
100 MHz to 25 GHz 25 dB
25 GHz to 26.5 GHz 23 dB
Frequency Response (in DC mode, input power
0 10 dBm):
10 MHz to 40 MHz +0.25 dB/
0 0.75 dB
40 MHz to 18 GHz
6
0.5 dB
18 GHz to 26.5 GHz
6 0.5 dB at 18 GHz to
6 1.4 dB at 26.5 GHz
Absolute Power Accuracy (in DC mode, 50 MHz, calibrated at 0 dBm)
Dynamic Power Accuracy
Agilent 85025A/B/D/E General Information 1-7

Table 1-7.
85025A/B/D/E Detector Supplemental haracteristics
RF Connector Mechanical Tolerances
:
Recession of the male center conductor from reference plane:
85025A 0.207 to 0.210 inches
1
85025A Option 001 0.000 to 0.003 inches
85025B 0.000 to 0.003 inches
85025D 0.000 to 0.002 inches
85025E 0.000 to 0.003 inches
Cable Length 1.22 m (48 inches)
eight (Including cable):
Net: 0.24 kg (0.5 lb)
Shipping: 1.0 kg (2.2 lb)
Dimensions
2
(Including input connector, not including cable)
1 Because a type-N gage calibration block zeros the gage at a 0.207-inch oset, the gage
displays a 0.207- to 0.210-inch oset as 0.000 to 0.003 inches
.
2 The model used in this illustration is an 5025A. Because of varying input connector
lengths, the overall length measurements for the other detector models covered by this
manual are:
5025A Option 001: 5 3/16 inches
5205B: 5 1/ inches
5025D: 5 1/4 inches
5025E: 5 7/16 inches
1-8 General Information Agilent 85025A/B/D/E

Operating Environ ent
The detector will operate safely under the following conditions, but its
performance is not necessarily warranted. See the specications section for
more information.
Temperature : 0

to +55

C
Humidity : Up to 95%. Protect the detector from temperature extremes
which can cause condensation.
Altitude : Up to 4,572 m ( 5,000 ft)
Accessories
The detectors come with a 2-meter cable. A 25-foot and 200-foot cable can be
ordered separately. Table 6- lists the accessories that are available for use with
these detectors.
Storage and Ship ent
To keep your detector in proper working condition, keep the following
suggestions in mind when storing or shipping it.
Environment
Store or ship the detectors in environments within the following limits:
Temperature : 0 25

to +75

C
Humidity : Up to 95%. Protect the detector from temperature extremes
which can cause condensation.
Altitude : Up to 4,572 m ( 5,000 ft)
Agilent 85025A/B/D/E General Information 1-9

Packaging
Use containers and materials identical or comparable to those used in factory
packaging. If you ship the detector, follow these packaging instructions:
. Wrap the detector in the original pouch and box. If they are not available,
wrap the detector in heavy paper and use a strong shipping container.
2. Provide a rm cushion that prevents movement inside the container. Use a
layer of shock-absorbing material around all sides of the detector
.
3. Seal the shipping container securely.
4. Mark the shipping container FRAGILE .
Returning a Detector for Service
When you make an inquiry, either by mail or by telephone, refer to the detector
by both model number and full serial number.
If you ship the detector to an Agilent oce or service center, ll out a
blue service tag (provided at the back of this manual), and include the following
information:
. Company name and address.
Do not use an address with a P.O. box number because products cannot be
returned to apost oce box.
2. The complete phone number of a technical contact person.
3. The complete model and serial number of the detector.
4. The type of service required (calibration, repair).
5. Any other information that could expedite service
, such as failure condition
or cause.
1-10 General Information Agilent 85025A/B/D/E