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