User’s and Service Guide
HP 11857D
7 mm Test Port Return Cable Set
HP Part Number 11857-90014 Supersedes: March 1986
Printed in USA September 1999
Notice.
The information contained in this document is subject to change without notice.
Hewlett-Packard makes no warranty of any kind with regard to this material, including but not limited to,
the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not
be liable for errors contained herein or for incidental or consequential damages in connection with the
furnishing, performance, or use of this material.
© Copyright 1986-1999 Hewlett-Packard Company
General Information
To obtain optimum performance from this cable set, observe these simple precautions:
• Flex and straighten the cables as little and seldom as possible.
• Make connections carefully to avoid misalignment and connector damage or inaccurate
measurements.
• Keep the connectors free of dirt and metallic particles.
• If you must clean the connectors, try clean compressed air first. Do not use abrasives. With
a plastic swab, apply only liquid Freon (trichlorotrifluoroethane) as a solvent.
• 7 mm center conductor recession with collet removed: 0.0 to 0.003 inch.
Description
The HP 11857D cable set consists of two 7 mm 50Ω cables, specified from 300 kHz to 3 GHz.
This set provides shielded RF connections to extend the test ports of S-parameter test sets
such as the HP 85046A. The cables can be ordered as either phase-matched or unmatched.
Model Description Qty HP Part Number
HP 11857D
Standard
HP 11857D
Option B24
Phase-matched 7 mm 50Ω cables 2 8120-4779
Unmatched 7 mm 50Ω cables 2 8120-8899
User’s and Service Guide 11857-90014 3
Figure 1. Model HP 11857D Cables, Option B24
4 User’sandServiceGuide11857-90014
Operating Characteristics
HP 11857D
Standard
Impedance 50Ω (nominal) 50Ω (nominal)
Connectors 7 mm 7 mm
Phase Match ≤ 4°
(at 2 GHz)
Return Loss ≥ 24 dB
(300 kHz to 3 GHz)
HP 11857D
Option B24
(300 kHz to 3 GHz)
Physical Characteristics
HP 11857D
Standard
Length 61 cm
(24 inches)
n/a
≥ 24 dB
HP 11857D
Option B24
61 cm
(24 inches)
Weight (both cables):
Net 0.91 kg (2 lbs) 0.91 kg (2 lbs)
Shipping 1.36 kg (2 lbs) 1.36 kg (2 lbs)
User’s and Service Guide 11857-90014 5
Warranty
This Hewlett-Packard instrument product is warranted against defects in material and
workmanship for a period of one year from date of delivery. During the warranty period,
Hewlett-Packard Company will, at its option, either repair or replace products which prove to
be defective.
For warranty service or repair, this product must be returned to a service facility designated
by HP. Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to
return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes
for products returned to HP from another country.
HP warrants that its software and firmware designated by HP for use with an instrument will
execute its programming instructions when properly installed on that instrument. HP does
not warrant that the operation of the instrument, or software, or firmware will be
uninterrupted or error free.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper handling by Buyer,
Buyer-supplied software or interfacing, unauthorized modification or misuse, or operation
outside of the environmental specifications of the product.
No other warranty is expressed or implied. HP specifically disclaims the implied warranties or
merchantability and fitness for a particular purpose.
Exclusive Remedies
The remedies provided herein are Buyer’s sole and exclusive remedies. HP shall not be liable
for any direct, indirect, special, incidental, or consequential damages, whether based on
contract, tort, or any other legal theory.
Assistance
Product maintenance agreements and other customer assistance agreements are available for
Hewlett-Packard Products.
Forany assistance, contact your nearest Hewlett-Packard Sales and Service Office. Addresses
are provided at the back of this guide.
6 User’sandServiceGuide11857-90014
Hewlett-Packard Sales and Service Offices
Instrument Support Center
Hewlett-Packard Company
(800) 403-0801
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User’s and Service Guide 11857-90014 7
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