Agilent 87075C Data Sheet

Agilent 87075C
3 MHz to 1.3 GHz

This document describes the performance
and features of Agilent Technologies 87075C
75-Ohm multiport test sets, both as standalone
units and when combined with Agilent 75-Ohm
8712ET, 8712ES, 8714ET, or 8714ES network
analyzers. The following options are available:

• Option 006 (6 ports)

• Option 012 (12 ports)

For more information about these test sets,
please read the following documents:

• Agilent 87075C brochure,
literature number 5968-4766E

• Agilent 87075C Configuration Guide,
literature number 5968-4768E

Agilent 87075C

75-Ohm Multiport Test Sets

Data Sheet

2

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

Definitions

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

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

Typical: Expected performance of an average unit.
A typical does not include guardbands. It is not
covered by the product warranty.

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

Supplemental information: May include typical, nomi­nal, or characteristic values.

Calibration: The process of measuring known stan­dards from a calibration kit to characterize the sys­tematic (repeatable) errors of a network analyzer.

Corrected (residual) performance: 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) performance: Indicates instrument
performance without error correction. The uncor­rected (raw) performance affects the stability of a
calibration.

System performance: Performance of a complete
multiport test system, which includes an 87075C
test set and a 75-Ohm 8712ET/ES or 8714ET/ES
network analyzer.

Test Set Cal: The calibration of a multiport test sys­tem, requiring the connection of known calibration
standards to all of the ports that will be used for
measurements.

SelfCal: An automated system calibration that uses
calibration standards internal to the test set and
the most recent Test Set Cal data to calibrate the
test system.

Environmental specifications: Environmental specifi­cations bound the external conditions for which
the specifications are valid. The environmental
specifications also bound the external conditions
the test set may be subject to without permanently
affecting performance or causing physical damage.

Table of contents

System performance, two-port calibration 3
System performance, T/R calibration 5
System performance, uncorrected 8
System performance, general 9
Test set input/output performance 12
Test set general information 13
Physical dimensions 14
Block diagrams 15
System features 16

Introduction

3

Two-port calibration (user)

Agilent 85036B/E Type-N calibration kit

Transmission uncertainty (typical)

2

Reflection uncertainty (typical)

2

1. These specifications apply under the following conditions: measurement uses the
“Fine” (15 Hz) bandwidth, no averaging, and isolation cal “on”; Test Set Cals use
the “Fine” (15 Hz) bandwidth, 16 averages, and assume an isolation calibration
has been performed; the test set must be used with a 75-Ohm 8712ES or 8714ES
network analyzer with firmware revision E.06.00 or later; the test set and the ana­lyzer must have had their performance verified within the last year; both instru­ments must have warmed up for at least 30 minutes after turn-on; measurements
are made at an environmental temperature of 25 °C ± 5 °C and within ± 1 °C of
the last valid Test Set Cal.

2. These uncertainty curves only include the effects of the test port(s) within the
measurement path. The effect of the uncorrected match of test ports outside
the measurement path is ignored, and is dependent on the isolation between the
ports of the DUT that are within the measurement path and ports of the DUT that
are outside the measurement path.

System performance

Magnitude

Phase

Magnitude

Phase

Specification1(dB)

Parameter 3 MHz to 1.3 GHz

Directivity 47

Source match 37

Load Match 47

Reflection tracking ±0.1

Transmission tracking ±0.1

4

Two-port calibration (user)

Agilent 85039B Type-F calibration kit

Transmission uncertainty (typical)

3

Reflection uncertainty (typical)

3

1. These specifications apply under the following conditions: measurement uses the
“Fine” (15 Hz) bandwidth, no averaging, and isolation cal “on”; Test Set Cals use
the “Fine” (15 Hz) bandwidth, 16 averages, and assume an isolation calibration
has been performed; the test set must be used with a 75-Ohm 8712ES or 8714ES
network analyzer with firmware revision E.06.00 or later; the test set and the
analyzer must have had their performance verified within the last year; both
instruments must have warmed up for at least 30 minutes after turn-on; measure­ments are made at an environmental temperature of 25 °C ± 5 °C and within
± 1 °C of the last valid Test Set Cal.

2. Measurements made using a DUT with center pins of the Type-F connectors
meeting the 0.77 to 0.86 mm limits.

3. These uncertainty curves only include the effects of the test port(s) within the
measurement path. The effect of the uncorrected match of test ports outside
the measurement path is ignored, and is dependent on the isolation between
the ports of the DUT that are within the measurement path and ports of the
DUT that are outside the measurement path.

System performance

Magnitude

Phase

Magnitude

Phase

Specification

1,2

(dB)

Parameter 3 MHz to 1.3 GHz

Directivity 35

Source match 28

Load Match 35

Reflection tracking ±0.1

Transmission tracking ±0.2

Transmission/reflection (T/R) calibration (user)

Agilent 85036B/E Type-N calibration kit

1. These specifications are valid for reflection (one-port) and transmission
(enhanced-response) Test Set Cals, and apply under the following conditions:
measurement uses the “Fine” (15 Hz) bandwidth, no averaging, and isolation cal
“on”; Test Set Cals use the “Fine” (15 Hz) bandwidth, 16 averages, and assume
an isolation calibration has been performed; the test set must be used with a
75-Ohm 8712ET, 8712ES, 8714ET, or 8714ES network analyzer with firmware revi­sion E.06.00 or later; the test set and the analyzer must have had their perform­ance verified within the last year; both instruments must have warmed up for at
least 30 minutes after turn-on; measurements are made at an environmental
temperature of 25 °C ± 5 °C and within ± 1 °C of the last valid Test Set Cal.

2. Corrected system performance is changed to typical when the current tempera­ture has drifted beyond ± 1 °C of the last valid Test Set Cal. Typicals are valid only
when the current temperature is within 25 °C ± 5 °C, and within ± 1 °C of the
most recent SelfCal.

Specification1(dB) Typical2(dB)

Parameter 3 MHz to 1.3 GHz 3 MHz to 1.3 GHz

Directivity 40 —

Source match 35 —

Load match (reflection calibration) 20 25

Load match (transmission calibration) 15 20

Reflection tracking ±0.1 —

Transmission tracking ±0.1 —

5

System performance

6

Transmission/reflection (T/R) calibration (user)

Agilent 85036B/E Type-N calibration kit (continued)

1. These uncertainty curves only include the effects of the test port(s) within the
measurement path. The effect of the uncorrected match of test ports outside the
measurement path is ignored, and is dependent on the isolation between the
ports of the DUT that are within the measurement path and ports of the DUT that
are outside the measurement path.

System performance

Transmission uncertainty, enhanced-response calibration (typical)

1

Magnitude, ES models

Magnitude, ET models with attenuator

Magnitude, ET models without attenuator

Phase, ES models

Phase, ET models with attenuator

Phase, ET models without attenuator

7

Transmission/reflection (T/R) calibration (user)

Agilent 85036B/E Type-N calibration kit (continued)

1. These uncertainty curves only include the effects of the test port(s) within the
measurement path. The effect of the uncorrected match of test ports outside the
measurement path is ignored, and is dependent on the isolation between the
ports of the DUT that are within the measurement path and ports of the DUT that
are outside the measurement path.

System performance

Magnitude, ES models

Magnitude, ET models with attenuator

Magnitude, ET models without attenuator

Phase, ES models

Phase, ET models with attenuator

Phase, ET models without attenuator

Reflection uncertainty, one-port calibration (typical)

1

8

Uncorrected

Type-N

1. These specifications apply under the following conditions: measurement uses the
“Fine” (15 Hz) bandwidth with narrowband detection and no averaging, and isola­tion cal “on”; Test Set Cals use the “Fine” (15 Hz) bandwidth, 16 averages, and
assume an isolation calibration has been performed; the test set must be used
with a 75-Ohm 8712ET, 8712ES, 8714ET or 8714ES network analyzer with firm­ware revision E.06.00 or later; the test set and the analyzer must have had their
performance verified within the last year; both instruments must have warmed up
for at least 30 minutes after turn-on; measurements are made at an environmental
temperature of 25 °C ± 5 °C and within ± 1 °C of the last valid Test Set Cal.

2. This is the match of any test port that is unselected (not in the measurement
path). If the network analyzer is performing a reflection measurement with one­port calibration, then only one port on the test set is selected (the source port).
If the network analyzer is performing a transmission measurement or a reflection
measurement with two-port calibration, then only two ports on the test set are
selected (the source and load ports).

3. This is the match of the test set port that has been selected as the load port. The
network analyzer must be making a transmission measurement or a reflection
measurement with two-port calibration for a test port to be selected as the
load port.

4. The uncorrected tracking terms are defined as the deviation over the defined
frequency band, ignoring offset loss.

5. Crosstalk is computed by normalizing the result of an isolation measurement to a
through measurement between the two ports such that the path losses are taken
into account. Isolation is defined as the transmission signal measured between
any two ports of the test system when those two ports are terminated with
shorts.

System performance

Specification1(dB) Typical (dB)

Parameter 3 MHz to 1.3 GHz 3 MHz to 1.3 GHz

Source match, ratioed 10 15

Load match, test port unselected

2

20 25

Load match, test port selected

3

13 18

Transmission tracking

4

— ±3.0

Reflection tracking

4

— ±3.0

Crosstalk5, 8712ET/8714ET — 72

Crosstalk5, 8712ES/8714ES — 72

9

General

1. Noise floor is defined as the rms value of the trace (in linear format) for a trans­mission measurement in CW mode, using the “Fine” bandwidth (15 Hz), the test
ports terminated in loads, 0 dBm at the test set source port, and no averaging.
This measurement ignores the effects of crosstalk. This is a system specifica­tion—the test set increases the network analyzer noise floor by adding loss to
the network analyzer measurement.

2. The system dynamic range is calculated as the difference between the receiver
minimum input (noise floor plus calibrated crosstalk) and the system’s maximum
output power. System dynamic range applies to transmission measurements only,
since reflection measurements are limited by directivity.

System performance

Specification Typical

System bandwidth

Fine Fine Med Wide Wide

15 Hz 15 Hz 4000 Hz 6500 Hz

3 MHz 3 MHz 3 MHz 3 MHz

to to to to

Network analyzer 1.3 GHz 1.3 GHz 1.3 GHz 1.3 GHz

System noise floor1(dBm)

8712ET/8714ET –96 –104 –79 –40

8712ES/8714ES –87 –99 –75 –42

System dynamic range2(dB)

8712ET, no attenuator 65 82 82 44

8712ET, with attenuator 63 81 81 43

8712ES 61 79 75 42

8714ET, no attenuator 65 79 79 41

8714ET, with attenuator 60 78 78 40

8714ES 58 76 72 39

General (continued)

Dynamic accuracy (typical)

2

1. The receiver dynamic range is calculated as the difference between the receiver
minimum input (noise floor) and the receiver maximum input. Receiver dynamic
range applies to transmission measurements only, since reflection measurements
are limited by directivity.

2. The reference power for dynamic accuracy is –20 dBm.

System performance

Specification Supplemental information

System bandwidth

Fine Fine Med Wide Wide

Network analyzer 15 Hz 15 Hz 4000 Hz 6500 Hz

Receiver dynamic range1(dB)

8712ET/8714ET 114 119 94 56

8712ES/8714ES 105 114 90 57

10

Magnitude, ES models

Magnitude, ET models

Phase, ES models

Phase, ET models

11

General (continued)

1. This is the time required to switch to any new port configuration, and requires
that the Test Set Cal has been performed for 201 points, the new measurement
configuration is 201 points, and no new SelfCal occurs during switching.

2. This is the time required to perform the SelfCal for any single port configuration,
assuming that the Test Set Cal was performed for 201 points, the new measure­ment configuration is 201 points, and the measurement bandwidth is “Med Wide”
(4000 Hz). SelfCal times for other settings can be found in Table 4-1 of the Agilent
87050E/87075C User’s and Service Guide (87050-90026).

System performance

Network analyzer Specification Characteristic (dBm)

Output power (system maximum)

<1 GHz >1 GHz

8712ET, no attenuator — 7 3.5

8712ET, with attenuator — 6 2.5

8712ES — 4 0.5

8714ET, no attenuator — 2 0.5

8714ET, with attenuator — 1 –0.5

8714ES — 0 –2.5

Parameter Specification Supplemental information

Port switching time1(sec)

Reflection calibration

— 0.7

Transmission enhanced calibration — 0.7

Two-port calibration — 0.7

SelfCal time2(sec)

Reflection calibration — 1 (typical)

Transmission enhanced calibration — 3 (typical)

Two-port calibration — 8 (typical)

12

1. Compression is defined for the test set, independent of the network analyzer.

2. This is the match of the test set port that has been selected as the source port.
The test set interconnect reflection port must be terminated with a load standard
from an 85036B/E calibration kit.

3. This is the match of any test port that is unselected (not in the measurement
path). Only the source port of the test set is selected when you make a reflection
measurement with one-port calibration. Only the source and load ports of the test
set are selected when you make a transmission measurement, or a reflection
measurement with two-port calibration.

4. This is the match of the test set port that has been selected as the load port.
A transmission or two-port measurement is required for a test port to be selected
as the load port. The test set interconnect transmission port must be terminated
with a load standard from an 85036B/E calibration kit.

5. This is the match of the test set interconnect ports (transmission and reflection
ports) with the test set in transmission, or two-port mode. The selected test set
test ports must be terminated with load standards from 85036B/E calibration kits.

6. The reflection and transmission ports of the test set are connected to the corre­sponding ports of the network analyzer. Port-n is any one of the test ports used to
connect to the device-under-test.

7. This is crosstalk of the test set measured between the test set’s interconnect
ports, with shorts on the selected test ports. Crosstalk is computed by normaliz­ing the result of an isolation measurement to a through measurement between
the two ports such that the path losses are taken into account. Isolation is
defined as the transmission signal measured between any two ports of the test
system when these two ports are terminated with shorts.

Test set input/output performance

Parameter Specification Supplemental

Frequency range 3 MHz to 1.3 GHz —

RF input power

Maximum input power at 0.1 dB — 16 dBm (nominal)
compression

1

Input damage power — 20 dBm (characteristic)

Specification (dB) Typical (dB)

Parameter 3 MHz to 1.3 GHz 3 MHz to 1.3 GHz

Source match, test port

2

12 16

Load match, test port unselected

3

20 25

Load match, test port selected

4

15 20

Interconnect match, reflection port

5

12 18

Interconnect match, transmission port

5

12 18

Insertion loss, reflection port to port-n

6

7.5 6.5

Insertion loss, transmission port to port-n

6

11.5 10.5

Tracking, reflection port to port-n

6

— 1.5

Tracking, transmission port to port-n

6

— 1.5

Crosstalk, uncalibrated, adjacent ports

7

57 72

Crosstalk, uncalibrated, non-adjacent ports

7

57 72

13

1. A third-wire ground is required.

Test set general information

Description Specification Supplemental information

Front panel ports

87075E, Option 006 6 Type-N, female 75 Ohms (nominal)

87075E, Option 012 12 Type-N, female 75 Ohms (nominal)

Real panel

Parallel in connector — 25-pin D-subminiature female (DB-25)

Parallel out connector — 25-pin D-subminiature female (DB-25)

Line power

1

Frequency 47 to 63 Hz —

Input voltage, operating 90 to 264 V —

Input power — <45 W (typical)

General environment

Minimize using static-safe work

ESD — procedures and an antistatic bench mat

(part number 9300-0797)

Dust — Minimize for optimum reliability

Operating environment

General Indoor use only —

Temperature 0 °C to + 55 °C —

Humidity (relative)

less than 80% RH up to 31 °C,

—

decreasing linearly to 50% RH at 40 °C

Altitude 0 to 4.5 km (15,000 ft) —

Storage conditions

Temperature –40 °C to +70 °C —

Humidity (relative) 0% to 90% RH at +65 °C (noncondensing) —

Altitude 0 to 15 km (50,000 ft) —

Cabinet dimensions

132.8 x 425 x 497 mm (nominal)

Height x width x depth — 5.2 x 16.7 x 19.6 in (nominal)

Cabinet dimensions exclude front and
rear protrusions

Weight

Net — 8 kg (18 lb) (nominal)

Shipping — 11 kg (24 lb) (nominal)

14

Physical dimensions of the Agilent 87075C
Option 006 multiport test set

1

Physical dimensions of the Agilent 87075C
Option 012 multiport test set

1

1. These dimensions exclude rear protrusions.

Physical dimensions

15

Block diagram for the Agilent 8712ET and 8714ET

Block diagram for the Agilent 8712ES and 8714ES

Block diagram for the Agilent 87075C
(only one test set port pair is shown)

Block diagrams

REAR PANEL

ADC and Processor

CRT

FRONT PANEL Reflection

With Attenuator Option 1E1

Narrowband Detector

Broadband Detector

AUX Input

Y

Input B

Input B*

X

Input R

Input R*

Input A

External Detectors

Reference

Reflected

(RF Out)

Y

X

RF

Source

Device

Under

Test

Incident

Transmission

Transmission

(RF In)

REAR PANEL

ADC and Processor

CRT

FRONT PANEL

Narrowband Detector

Broadband Detector

AUX Input

Y

Input B

Input B*

X

Input R

Input R*

Input A

External Detectors

Reference

Port 1

Y

X

RF

Source

Device
Under

Test

Port 2

16

Test set control

Control of the switches inside the test set and cali­bration of the test system can be accomplished
from the front panel of the network analyzer—an
external computer is not required. However, the
analyzers are fully programmable for use in auto­mated test environments.

Measurement

Number of display measurements

Two measurement displays are available, with
independent control of display parameters includ­ing format type, scale per division, reference level,
reference position, and averaging. The displays can
share network analyzer sweep parameters, or, by
using alternate sweep, each measurement can have
independent sweep parameters including frequency
settings, IF bandwidth, power level, and number of
trace points. The instrument can display a single
measurement, or dual measurements on a split (two
graticules) or overlaid (one graticule) screen.

Measurement choices

• Narrowband
ET models: reflection (A/R), transmission (B/R),

A, B, R
ES models: S11(A/R), S22(B/R), S21(B/R),
S12(A/R), A, B, R

• Broadband
X, Y, Y/X, X/Y, Y/R*, power (B*, R*),
conversion loss (B*/R*)
Note: X and Y denote external broadband-detector
inputs; * denotes internal broadband detectors.

Formats

Log or linear magnitude, SWR, phase, group delay,
real and imaginary, Smith chart, polar, and imped­ance magnitude.

Trace functions

Current data, memory data, memory with current
data, division of data by memory.

Display annotations

Start/stop, center/span, or CW frequency, scale
per division, reference level, marker data, softkey
labels, warning and caution messages, screen titles,
time and date, and pass/fail indication.

Limits

Measurement data can be compared to any combi­nation of line or point limits for pass/fail testing.
User-defined limits can also be applied to an
amplitude- or frequency-reference marker. A limit-

test TTL output is available on the rear panel for
external control or indication. Limits are only
available with rectilinear formats.

Data markers

Each measurement channel has eight markers.
Markers are coupled between channels. Any one
of eight markers can be the reference marker for
delta-marker operation. Annotation for up to four
markers can be displayed at one time.

Marker functions

Markers can be used in absolute or delta modes.
Other marker functions include marker to center
frequency, marker to reference level, marker to
electrical delay, searches, tracking, and statistics.
Marker searches include marker to maximum,
marker to minimum, marker to target value, band­width, notch, multi-peak and multi-notch. The
marker-tracking function enables continuous update
of marker search values on each sweep. Marker
statistics enable measurement of the mean, peak­to-peak, and standard deviation of the data
between two markers. For rapid tuning and test­ing of cable-TV broadband amplifiers, slope and
flatness functions are also available.

Storage

Internal memory

1.5 Mbytes (ET models) or 1 Mbyte (ES models) of
nonvolatile storage is available to store instrument
states, measurement data, screen images, and IBASIC
programs. Instrument states can include all control
settings, limit lines, memory data, calibration coef­ficients, and custom display titles. If no other data
files are saved in nonvolatile memory, between
approximately 20 and 150 instrument states can
be saved (depending on the model type and on
instrument parameters). Approximately 14 Mbytes
of volatile memory are also available for tempor­ary storage of instrument states, measurement
data, screen images, and IBASIC programs.

Disk drive

Trace data, instrument states (including calibra­tion data), and IBASIC programs can be saved on
floppy disks using the built-in 3.5-inch disk drive.
All files are stored in MS-DOS®-compatible format.
Instrument data can be saved in binary or ASCII
format (including Touchstone/.s2p format), and
screen graphics can be saved as PCX (bit-mapped),
HP-GL (vector), or PCL5 (printer) files.

NFS: See description under Control via LAN.

System features

17

Data hard copy

Hard copy prints can be made using PCL and PCL5
printers (such as HP DeskJet or LaserJet series
printers), or Epson-compatible graphics printers.
Single color and multicolor formats are supported.
Hard copy plots can be automatically produced
with HP-GL-compatible plotters such as the Agilent
7475A, or with printers that support HP-GL. The
analyzer provides Centronics (parallel), RS-232C,
GPIB, and LAN interfaces.

Automation

Controlling via GPIB
Interface: The GPIB interface operates to IEEE

488.2 and SCPI standard-interface commands.

Control: The analyzer can either be the system
controller, or pass bus control to another active
controller.

Data transfer formats:

• ASCII

• 32- or 64-bit IEEE 754 floating-point format

• Mass-memory-transfer commands allow file
transfer between external controller and
analyzer.

Control via LAN

The built-in LAN interface and firmware support
data transfer and control via direct connection to a
10 Base-T (Ethertwist) network. A variety of stan­dard protocols are supported, including TCP/IP,
sockets, ftp, http, telnet, bootp, and NFS. The LAN
interface is standard.

SCPI: The analyzer can be controlled by sending
Standard Commands for Programmable Instru­ments (SCPI) within a telnet session or via a socket
connection and TCP/IP (the default socket port is

5025). The analyzer’s socket applications program-

ming interface (API) is compatible with Berkeley
sockets, Winsock, and other standard socket APIs.
Socket programming can be done in a variety of
environments including C programs, Agilent VEE,
SICL/LAN, or a Java™ applet. A standard web
browser and the analyzer’s built-in web page can
be used to remotely enter SCPI commands via a
Java applet.

FTP: Instrument state and data files can be trans­ferred via ftp (file-transfer protocol). An internal,
dynamic-data disk provides direct access to instru-

ment states, screen dumps, trace data, and operat­ing parameters.

HTTP: The instrument’s built-in web page can be
accessed with any standard web browser using
http (hypertext transfer protocol) and the network
analyzer’s IP address. The built-in web page can be
used to control the network analyzer, view screen
images, download documentation, and link to other
sites for firmware upgrades and VXIplug&play
drivers. Some word processor and spreadsheet pro­grams, such as Microsoft® Word 97 and Excel 97,
provide methods to directly import graphics and
data via a LAN connection using http and the net­work analyzer’s IP address.

SICL/LAN: The analyzer’s support for SICL (standard
instrument control library) over the LAN provides
control of the network analyzer using a variety of
computing platforms, I/O interfaces, and operating
systems. With SICL/LAN, the analyzer is controlled
remotely over the LAN with the same methods used
for a local analyzer connected directly to the com­puter via a GPIB interface. SICL/LAN protocol
also allows the use of Agiltent’s free VXIplug&play
driver to communicate with the multiport test
system over a LAN. SICL/LAN can be used with
Windows® 95/98/NT, or HP-UX.

NFS: The analyzer’s built-in NFS (network file sys­tem) client provides access to remote files and
directories using the LAN. With NFS, remote files
and directories (stored remotely on a computer)
behave like local files and directories (stored locally
within the analyzer). Test data taken by the net­work analyzer can be saved directly to a remote
PC or UNIX® directory, eliminating the need for a
remotely initiated ftp session. For Windows-based
applications, third-party NFS-server software must
be installed on the PC. NFS is fully supported in
most versions of UNIX.

Bootp: Bootstrap protocol (bootp) allows a network
analyzer to automatically configure itself at power­on with the necessary information to operate on
the network. After a bootp request is sent by the
analyzer, the host server downloads an IP and gate­way address, and a subnet mask. In addition, the
analyzer can request an IBASIC file, which auto­matically executes after the transfer is complete.
For Windows-based applications, third-party
bootp-server software must be installed on the PC.
Bootp is fully supported in most versions of UNIX.

System features (continued)

18

Programming with IBASIC

As a standard feature, all Agilent 8712ET/ES
and 8714ET/ES network analyzers come with the
Instrument BASIC programming language (IBA­SIC). IBASIC facilitates automated measurements
and control of other test equipment, improving
productivity. For simpler applications, you can use
IBASIC as a keystroke recorder to easily automate
manual measurements. Or, you can use an optional,
standard PC keyboard to write custom test applica­tions that include:

• Special softkey labels

• Tailored user prompts

• Graphical setup diagrams

• Barcode-reading capability

• Control of other test instruments via the GPIB,
serial, or parallel interfaces

Measurement calibration

Measurement calibration is a process that
improves measurement accuracy by using error­correction arrays to remove systematic measure­ment errors.

The Test Set Cal and SelfCal features on your mul­tiport test system increase the accuracy of your
measurements and significantly increase the test
efficiency of your work stations by eliminating
frequent and lengthy calibration procedures.

Test Set Cal

A Test Set Cal is a calibration that should be per­formed on a regular but relatively infrequent basis
(at least once a month is recommended). A Test Set
Cal requires connection of mechanical calibration
standards to all of the ports you will be using for
your measurements.

Test Set Cal for the 8712ET and 8714ET analyzers

The data collected by the analyzer during a
Test Set Cal always includes both transmission
(enhanced response) calibration data and reflec­tion (one-port) calibration data. When making
measurements after calibration, the analyzer auto­matically recalls and uses the correct set of cali­bration data for the type of measurement chosen.

Test Set Cal for the 8712ES and 8714ES analyzers

The S-parameter network analyzers perform either
two-port calibration or enhanced response/one­port calibration. Choosing a two-port calibration
for the Test Set Cal removes the most systematic
errors, giving you the greatest measurement accu­racy. Choosing the enhanced response/one-port
calibration allows faster measurement speeds, but
is not as accurate as full two-port calibration.

SelfCal

A SelfCal is an internal system calibration that
automatically executes in just a few seconds on
a regular, frequent basis (once per hour is recom­mended). A SelfCal does not require that you
remove your DUT or that you make any connections
of external calibration standards. The SelfCal uses
the results of the most recent Test Set Cal, along
with current measurements of internal, electroni­cally switched, open, short, load, and through
standards. SelfCal removes the drift of the network
analyzer and multiport test set due to environ­mental variations.

System features (continued)

19

Other calibrations

Besides using a Test Set Cal, individual instrument
states and their corresponding calibrations can be
saved and recalled for use with specific measure­ment paths. For example, to improve measurement
throughput, one signal path could be tested using a
response calibration, while all other paths are tested
with a Test Set Cal using two-port calibration.
Note: the SelfCal feature is only supported with
Test Set Cals.

A variety of calibration types are available and
described below:

ES models only

• Two-port calibration
Compensates for frequency response, source
and load match, and directivity errors while
making S-parameter measurements of trans­mission (S21, S12) and reflection (S11, S22).
Compensates for transmission crosstalk when
the Isolation on OFF softkey is toggled to ON.
Requires short, open, load, and through standards.

ET and ES models: transmission measurements

• Normalization
Provides simultaneous magnitude and phase
correction of transmission frequency-response
errors. Requires a through connection. Used for
both narrowband and broadband detection.
Does not support calibration interpolation.

• Response
Simultaneous magnitude and phase correction
of frequency response errors for transmission
measurements. Requires a through standard.

• Response and isolation
Compensates for frequency response and
crosstalk errors. Requires a load termination
on both test ports and a through standard.

• Enhanced response
Compensates for frequency response and source
match errors. Requires short, open, load, and
through standards.

ET and ES models: reflection measurements

• One-port calibration

Compensates for frequency response, directivity,
and source-match errors. Requires short, open,
and load standards.

Calibration kits

Data for several standard calibration kits are
stored in the instrument for use by the calibration
routines. They include:

• Type-N 75-Ohm (Agilent 85036B/E)

• Type-F (Agilent 85039B)

In addition, you can also describe the standards
for a user-defined calibration kit (for example,
open-circuit capacitance coefficients, offset-short
length, or through-standard loss).

For more information about calibration kits avail­able from Agilent, consult the 87075C Configuration
Guide, literature number 5968-4768E.

Key network analyzer options

75 Ohms (Option 1EC)

Provides 75-Ohm system impedance.

Step attenuator (Option 1E1)

Adds a built-in 60 dB step attenuator to transmis­sion/reflection (ET) models to extend the output
power range to –60 dBm. The attenuator is stan­dard in S-parameter (ES) models.

System features (continued)

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Support, Services, and Assistance

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that you get the test and measurement capabilities you paid
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Every instrument and system we sell has a global warranty.
Support is available for at least five years beyond the produc­tion life of the product. Two concepts underlie Agilent’s
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“Our Promise” means your Agilent test and measurement equip­ment will meet its advertised performance and functionality.
When you are choosing new equipment, we will help you with
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Product specifications and descriptions in this
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Copyright © 1999, 2000 Agilent Technologies
Printed in U.S.A. 8/00
5968-4767E