Specifications

NETWORK ANALYZERS
354 For product ordering information, see pages 4 – 10
Four, each of which can display any S-parameter or user-defined parameter in any format with up to two traces per
Display channels
channel for a maximum of eight traces simultaneously. Each channel is also capable of displaying harmonics, noise figure,
intermodulation distortion, or time domain trace. A single channel, two channels (1 and 3, or 2 and 4), or all four channels
can be displayed simultaneously. Channels 1 and 3, or channels 2 and 4, can be overlaid for rectilinear graph types.
Trace overlay
Displays two data traces on the active channel’s graticule simultaneously. The overlaid trace is displayed in yellow and
the primary trace is displayed in red.
Trace memory
A separate memory for each channel can be used to store measurement data for later display or subtraction, addition,
multiplication or division with current measurement data.
Blank frequency information
Blanking function removes all references to displayed frequencies on the LCD. Frequency blanking can only be
restored through a system reset or GPIB command.
Averaging of 1 to 4096 averages can be selected. The data averaging function is performed at each data point during
Data averaging the frequency sweep. Averaging can be toggled on or off via the front panel; a front-panel LED indicates that the data
averaging function is enabled.
IF bandwidth Soft Key selection of IF bandwidth (30 kHz, 10 kHz, 3 kHz, 1 kHz, 300 Hz, 100 Hz, 30 Hz, 10 Hz)
Trace smoothing
Computes an average over a percentage range of the data trace. The percentage of trace to be smoothed can be
selected from 0 to 20% of trace.
Group delay is measured by computing the phase change in degrees across a frequency step by applying the formula:
Defined as the frequency span over which the phase change is computed at a given frequency point. The aperture can
Aperture
be changed without recalibration. The minimum aperture is the frequency range divided by the number of points in
calibration and can be increased to 20% of the frequency range without recalibration. The frequency width of the
Group delay aperture and the percent of the frequency range are displayed automatically.
characteristics
Range
The maximum delay range is limited to measuring no more than ±180° of phase change within the aperture set by
the number of frequency points. A frequency step size of 100 kHz corresponds to 10 microseconds.
Measurement For continuous measurement of a through connection, RSS fluctuations due to phase and FM noise are:
repeatability
(sweep to
sweep)
Accuracy
Frequency Allows the measurement of group delay of mixers and other translating devices by analyzing the phase shift experienced
Translating by a modulated signal (generated internally). The above Group Delay equation applies, except that the phase change is
Group measured across the modulating bandwidth of the test signal instead of across frequency points. The aperture is fixed at
Delay about 900 kHz and the range is limited to about 1 µs. The use of angle modulation keeps the measurement relatively
(FTGD) immune from compression and other non-linearities.
The LRL calibration technique uses the characteristic impedance of a length of transmission line as the calibration
standard. A full LRL calibration consists merely of two transmission line measurements, a high reflection measurement,
LRL/LRM calibration
and an isolation measurement. The LRM calibration technique is a variation of the LRL technique that utilizes a
capability
precision termination rather that a second length of transmission line. A third optional standard, either Line or
Match may be measured in order to extend the frequency range of the calibration. This extended calibration is achieved
by mathematically concatenating either two LRL, two LRM, or one LRL and one LRM calibration(s). Using these
techniques, full 12-term error correction can be performed on the MS462XX VNA.
Dispersion compensation Selectable as Coaxial (non-dispersive), Waveguide, or Microstrip (dispersive)
Reference plane Selectable as Middle of line 1 or Ends of line 1
Corrected impedance Determined by Calibration Standards
AutoCal
®
The Scorpion
™
family will incorporate internal control of the 3658X-series AutoCal
®
modules.
Scorpion
™
supports the HP 2225C InkJet, HP QuietJet, HP DeskJet, HP LaserJet II, III, IV, & V Series,
Printer
and Epson compatible printers with parallel (Centronics) interfaces.
They are also compatible with the ANRITSU “CAP3700” program (outputs bitmap file over GPIB) and provide bitmap
output over front panel to disk.
GPIB plotters Scorpion
™
supports the HP Models 7440A, 7470A, and 7475A and Tektronix Model HC100 plotters.
Ten front panel states (setup/calibration) can be stored and recalled from nonvolatile memory locations. The current
Internal memory front panel setup is automatically stored in nonvolatile memory at instrument powerdown. When power is applied, the
instrument returns to its last front-panel setup. The system will be able to exchange two stored calibrations in <0.5 s.
Internal nonvolatile memory Used to store and recall measurement and calibration data and frontpanel setups. All files are MS-DOS compatible.
Internal floppy disk drive
A 3.5 inch diskette drive with 1.44 Mb formatted capacity is used to load measurement programs and to store and
recall measurement and calibration data and front-panel setups.
Measurement data 102.8 kb per 1601 point S-parameter data file
Calibration data 187.3 kb per 1601 point S-parameter data file (12-term cal plus setup)
Trace memory file 12.8 kb per 1601 point channel
GPIB interfaces 2 ports
System GPIB (IEEE-488.2)
Connects to an external controller for use in remote programming of the network analyzer. Address can be set from the
front panel and can range from 1 to 30.
Dedicated GPIB
Connects to external peripherals for network analyzer controlled operations (e.g. GPIB plotters, frequency counters,
frequency synthesizers, and power meters).
Continued on next page
Display capabilitiesMeasurement enhancements
1.41 {(Phase Noise)^2 + (Tg x Residual FM Noise)^2}^.5
360 (Aperture in Hz)
Tg = –1/360 d(phase)
d(frequency)
Error in Tg = Error in phase
360 + (Tg x Aperature Freq. Error (Hz)
Aperture
Hard copyStorage
Group
delay
GPIB