Agilent Technologies X/P/K281C Service manual

Agilent Technologies
Agilent X/P/K281C
Adapters
Including Options 006, 012,
013, 106
Operating and Service
Manual

2 Agilent X/P/K281C Adapters Operating and Service Manual
Notices
© Agilent Technologies, Inc. 1996 - 2013
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Manual Part Number
00281-90043
Edition
Second Edition, April 2013
Printed in Malaysia
Agilent Technologies, Inc.
Phase 3 Bayan Lepas Free Industrial Zone
Bayan Lepas, Penang 11900 Malaysia
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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.

Agilent X/P/K281C Adapters Operating and Service Manual 3
Certification
Agilent Technologies certifies that this product met its
published specifications at the time of shipment from the
factory. Agilent Technologies further certifies that its
calibration measurements are traceable to the United States
National Institute of Standards and Technology (NIST,
formerly NBS), to the extent allowed by the Institute’s
calibration facility, and to the calibration facilities of other
International Standards Organization members.
Safety Earth Ground
This is a Safety Class I product (provided with a protective
earthing terminal). An uninterruptible safety earth ground
must be provided from the main power source to the
product input wiring terminals, power cord, or supplied
power cord set. Whenever it is likely that the protection has
been impaired, the product must be made inoperative and
secured against any unintended operation.
Before Applying Power
Verify that the product is configured to match the available
main power source as described in the input power
configuration instructions in this manual. If this product is
to be powered by an autotransformer, make sure the
common terminal is connected to the neutral (grounded)
side of the ac power supply.

4 Agilent X/P/K281C Adapters Operating and Service Manual
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www.agilent.com/find/contactus

Agilent X/P/K281C Adapters Operating and Service Manual 5
Contents
1 Introduction 7
Product Overview 8
Options 8
Instruments Covered by Manual 10
2 Installation 11
Initial Inspection 12
Operation and Safety Precautions 13
Operating Procedure 13
Performance Test – SWR 14
Adjustments 14
3 Specification 15
General Specifications 16
Physical Specifications 16
Specifications 16
Mechanical Characteristic 18
Pin Depth 18
Environmental Specifications 21
Safety and Regulatory Markings 22
Declaration of Conformity 24
4ServiceInformation25
Service Information 26
Replacing the Center Conductor Contact 26
Replaceable Parts 27

6Agilent X/P/K281C Adapters Operating and Service Manual
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7
Agilent Technologies
Agilent X/P/K281C Adapters
Operating and Service Manual
1
Introduction
Product Overview 8
“Options” on page 8
“Instruments Covered by Manual” on page 10
This chapter provides an overview of the Agilent X/P/K281C
Adapters.

8 Agilent X/P/K281C Adapters Operating and Service Manual
1 Introduction
Product Overview
The X281C, P281C, and K281C adapters provide a
convenient means of coupling between waveguide and
coaxial systems. Power can be transmitted in either
direction, and each adapter covers the full frequency range
of its waveguide size. A step- like internal structure
transforms the waveguide impedance to the 50 Ωimpedance
of the coaxial line.
Options
Option 006
Option 006 adds two alignment holes to the waveguide
flange. The dimensions of the Option 006 alignment holes
are provided in the following table.
Table 1- 1 Option 006 Alignment Hole Measurement Dimensions
Model Alignment Hole
Diameter “A”
Dimension “B” Dimension “C”
X281C 3.175 mm
(+0.014 to 0.0)
15.49 mm 16.26 mm
P281C 3.175 mm
(+0.014 to 0.0)
12.62 mm 12.14 mm
K281C 2.381 mm
(+0.014 to 0.0)
8.13 mm 8.51 mm

Introduction 1
Agilent X/P/K281C Adapters Operating and Service Manual 9
Figure 1-1 K281C Option 006 Waveguide Alignment Holes
Option 012
Option 012 for the X281C offers a Type- N (m) connector to
replace the standard 7- mm connector.
Option 012 for the K281C offers a 3.5 mm (m) connector to
replace the standard 3.5 mm (f) connector.
Option 013
Option 013 for the X281C offers a Type- N (f) connector to
replace the standard 7- mm connector. Option 013 is not
offered for the K281C and the P281C.
Option 106
Option 106 is only available for the K281C. It replaces the
standard 3.5 mm (f) connector with a 3.5 mm (m) connector
and adds two alignment holes to the waveguide flange. The
dimensions of the alignment holes are identical to Option
006 for the K281C as shown in Table 1- 1.

10 Agilent X/P/K281C Adapters Operating and Service Manual
1 Introduction
Instruments Covered by Manual
The adapters covered by this manual have a two part serial
number. The first four digits and letter constitute the serial
number prefix. The last five digits form the sequential suffix
that is unique to each adapter. The contents of this manual
apply to adapters prefixed at 3032A and above.

11
Agilent Technologies
Agilent X/P/K281C Adapters
Operating and Service Manual
2
Installation
Initial Inspection 12
Operation and Safety Precautions 13
“Operating Procedure” on page 13
“Performance Test – SWR” on page 14
“Adj ust ment s” on page 14
This chapter provides you important information on how to
check and prepare your instrument for operation.

12 Agilent X/P/K281C Adapters Operating and Service Manual
2 Installation
Initial Inspection
1Unpack and inspect the shipping container and its
contents thoroughly to ensure that nothing was damaged
during shipment. If the shipping container or cushioning
material is damaged, the contents should be checked both
mechanically and electrically. Check for mechanical
damage such as scratches or dents.
2If the contents are damaged or defective, contact your
nearest Agilent Technologies Service and Support Office.
Refer to “Contacting Agilent” in the front matter of this
manual. Agilent Technologies will arrange for repair or
replacement of the damaged or defective equipment. Keep
the shipping materials for the carrier’s inspection.
3If you are returning the instrument under warranty or for
service, repackaging the instrument requires original
shipping containers and materials or their equivalents.
Agilent Technologies can provide packaging materials
identical to the original materials. Refer to “Contacting
Agilent” in the front matter of this manual for the Agilent
Technologies nearest to you. Attach a tag indicating the
type of service required, return address, model number,
and serial number. Mark the container FRAGILE to
assure careful handling. In any correspondence, refer to
the instrument by its model number and serial number.

Installation 2
Agilent X/P/K281C Adapters Operating and Service Manual 13
Operation and Safety Precautions
Observe the following guidelines before connecting or
operating the adapter.
Operating Procedure
Use the following procedure when you connect an adapter to
a waveguide.
1Make sure the rectangular ports are oriented the same
way; that is, not “cross- guided”.
2Align ports carefully to minimize reflections.
3Clamp or bolt flanges securely together so that pressure is
evenly distributed over the contacting surfaces. Loose
waveguide connections and flange distortion may result in
leakage and mismatch.
CAUTION
•Exceeding the allowable energy and power levels may result in
damage to the adapter or associated equipment.
•Care should be taken to protect the face of the flange from any
damage that would prevent close surface-to-surface contact. Any
burring, denting, or scratching may increase RF leakage and the
reflection coefficient of the waveguide connection. The supplied
plastic cover should be used to protect the flange when the adapter
is not in use.
•The power that can be handled will be a function of the size of the
center conductor. The majority of the heat flow will be via
conduction. The weak point is the coax portion. The waveguide
portion is capable of higher power. These numbers are assuming an
ambient temperature of 25 °C and an altitude of sea level. Higher
ambient temperatures and altitude would degrade power-handling
capability.

14 Agilent X/P/K281C Adapters Operating and Service Manual
2 Installation
Performance Test – SWR
The maximum SWR for the adapters are shown in Table 3- 1
and Figure 3- 1. When making these measurements, the test
results must be less that those listed in Table 3- 1 plus the
measurement uncertainty of the measuring system.
Measurements may be made using a standard reflectometer
setup. To ensure satisfactory performance, make sure flanges
and coaxial connectors are not damaged or worn.
Adjustments
Adjustments should not be made unless the adapter does not
meet specifications, or unless the unit has been physically
damaged.

15
Agilent Technologies
Agilent X/P/K281C Adapters
Operating and Service Manual
3
Specification
General Specifications 16
“Physical Specifications” on page 16
“Specifications” on page 16
Mechanical Characteristic 18
“Pin Depth” on page 18
Environmental Specifications 21
Safety and Regulatory Markings 22
Declaration of Conformity 24
This chapter provides the specifications of the Agilent
X/P/K281C Adapters.

16 Agilent X/P/K281C Adapters Operating and Service Manual
3 Specification
General Specifications
Physical Specifications
Specifications
Specifications refer to the performance standards or limits
against which the adapter is tested.
Typical characteristics are included for additional
information only and they are not specifications. These are
denoted as “typical”, “nominal”, or “approximate” and are
printed in italic.
Model X281C P281C K281C
Net weight 210 g (7.20 oz) 110 g (4.0 oz) 40 g (1.3 oz)
Dimensions:
Length
Width
Height
73 mm (2.9 in)
41 mm (1.6 in)
61 mm (2.4 in)
52 mm (2.0 in)
33 mm (1.3 in)
55 mm (2.2 in)
35 mm (1.4 in)
22 mm (0.9 in)
38 mm (1.5 in)
Waveguide size:
Nominal outer
diameter
25.40 x 12.70 (mm)
1.00 x 0.50 (in)
17.83 x 9.93 (mm)
0.70 x 0.39 (in)
12.70 x 6.35 (mm)
0.50 x 0.25 (in)
Table 3- 1 Specifications
Model X281C P281C K281C
Frequency range (GHz) 8.2 to 12.4 12.4 to 18 18 to 26.5
SWR*< 1.05 < 1.06 < 1.07
(Typical SWR) (< 1.03) (< 1.04) (< 1.05)
Operating temperature 0 to +55 °C 0 to +55 °C 0 to +55 °C

Specification 3
Agilent X/P/K281C Adapters Operating and Service Manual 17
Figure 3- 1 shows the variation in SWR introduced by the
center conductor gap.
Figure 3-1 Typical SWR Variation Versus Center Conductor Gap
Typical insertion loss 0.08 dB 0.10 dB 0.12 dB
Maximum peak power†200 W 200 W 100 W
EIA WR90 WR62 WR42
Equivalent flange type UG-135/U UG-419/U UG-597/U
Alignment holes 4 holes (6 holes for option 006‡)
Connector type:
Standard
Option 012
Option 013
Option 106
7-mm
N-male
N-female
Not available
7-mm
Not available
Not available
Not available
3.5 mm female
3.5 mm male
Not available
3.5 mm male with 6
alignment holes
* Specifications in this table are measured with no gap between the full diameters of the male and female center conductors.
† The power that can be handled will be a function of the size of the center conductor. The majority of the heat flow will be via
conduction. The weak point is the coax portion. The waveguide portion is capable of higher power. These numbers are as-
suming an ambient temperature of 25 °C and an altitude of sea level. Higher ambient temperatures and altitude would de-
grade power-handling capability.
‡ Option 006 is only available for the standard connector type.
Table 3- 1 Specifications (continued)
Model X281C P281C K281C

18 Agilent X/P/K281C Adapters Operating and Service Manual
3 Specification
Mechanical Characteristic
Mechanical characteristics, such as center conductor
protrusion and pin depth, are not warranted performance
specifications.
They are however important supplemental characteristics
related to the electrical performance of the devices.
Pin Depth
Pin depth is the distance that the center conductor mating
plane differs from being flushed with the outer conductor
mating plane. The pin depth of a connector can be in one of
two states, protruding or recessed.
Figure 3- 2, Figure 3- 3, and Figure 3- 4 show a visual
representation of proper pin depth for connector types for
standard and option models.
Table 3- 2 Connector Types for Standard and Options
Model X281C P281C K281C
Standard/Option 006 7-mm 7-mm 3.5 mm female
Option 012 N-male Not available 3.5 mm male
Option 013 N-female Not available Not available
Option 106 Not available Not available 3.5 mm male

Specification 3
Agilent X/P/K281C Adapters Operating and Service Manual 19
Figure 3-2 Typ e- N C o n ne ct or s
Figure 3-3 3.5-mm Connectors

20 Agilent X/P/K281C Adapters Operating and Service Manual
3 Specification
Figure 3-4 7-mm Connector