37200B Series
RF and Microwave Vector Network Analyzers
for Passive Device Measurements
Technical Data Sheet
SYSTEM DESCRIPTION
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The 37200B Vector Network Analyzers are high performance tools
designed to make fast and accurate S-parameter measurements of
passive devices across the 22.5 MHz to 40 GHz range. These network analyzers integrate a synthesized source, S-parameter test
set and tuned receiver into a single compact package that is ideal
for bench-top testing. (For comprehensive measurements of active
devices see the 37300A data sheets.)
Specifications for these 37200B models are detailed on the
following pages:
RF Models:
Model 37211B 22.5 MHz to 3 GHz
Model 37217B 22.5 MHz to 8.6 GHz
Microwave Models:
Model 37225B 40 MHz to 13.5 GHz
Model 37247B 40 MHz to 20 GHz
Model 37269B 40 MHz to 40 GHz
High throughput measurements are achieved in each model
through the use of fast, 12-term error corrected sweeps, fast GPIB
data transfers and an intuitive user interface. All measurement
results are displayed on a large LCD color display or on an external
VGA monitor.
For maximum productivity, the 37200B VNAs include as
standard features:
Fast Sweeping Synthesized Source
Each of the 37200B network analyzers are designed for easy
Auto Reversing Test Set
Solid-State Transfer Switch
Four Independent Displays
Four Channel Receiver
Internal Hard and Floppy Disk Drives
LRL/LRM Calibration
Adapter Removal Calibrations
Fast Measurement Throughput via GPIB
upgradeability. Any version of the 37200B can be upgraded to
accommodate new options or additional frequency ranges by
ordering the appropriate upgrade kit. 37200B to 37300A upgrades
are also supported.
SYSTEM PERFORMANCE
Dynamic Range:
The following table gives dynamic range in two manners.
“Receiver Dynamic Range” is defined as the ratio of the maximum
signal level at Port 2 for 0.1 dB compression to the noise floor at
Port 2.
“System Dynamic Range” is defined as the ratio of the power
incident on Port 2 in a through line connection to the noise floor at
Port 2 (forward measurements only).
In preparing the table, 10 Hz IF bandwidth and 512 averages were
used in calibration and measurement.
Frequency Signal Into
Model
37211B 2 +3 −98 101 0 98
37217B 2 +3 −98 101 0 98
37225B 2 +3 −98 101 0 98
37247B 2 +3 −98 101 0 98
37269B
(GHz) Port 2
0.0225 +3 −95 115 0 95
3 +3 −98 101 0 98
0.0225 +3 −95 115 0 95
8.6 +3 −98 101 0 98
0.04 +20 −70 90 0 70
13.5 +3 −98 101 0 98
0.04 +20 −70 90 0 70
20 +3 −96 99 0 96
0.04 +20 −70 90 0 70
2 +3 −98 101 0 98
20 +3 −95 98 −590
40 +3 −93 96 −15 78
Max. Receiver Port 1 System
(dBm)
Noise
Dynamic Power Dynamic
Floor
(dBm)
Range (dBm, Range
(dB) Typical) (dB)
High Level Noise (typical): <0.03 dB and <0.4 degrees peak-to-
peak variation in a 1 kHz IF bandwidth up to 20 GHz. <0.08 dB
and <0.5 degrees peak-to-peak variation up to 40 GHz.
Measurement Throughput: Measurement times are based
on a single 40 MHz to 20 GHz sweep with 10 kHz IF bandwidth
(no averages) after a full 12-term calibration. Sweep times
include retrace and band switch times.
Measurement Time (ms) vs. Data Points (typical)
Calibration
Type 3 51 101 401 1601
1 Port (3 Term) 60 250 330 960 3300
Full 2 Port 60 270 400 1000 3600
Data Points
Measurement Time vs. Sweep Mode for 101 Data Points (typical)
Sweep Mode Time (ms)
Linear
List
CW
350
350
230
Measurement Time vs. IF BW for 101 Data Points (typical)
IF Bandwidth Time (ms)
10 kHz
1 kHz
100 Hz
10 Hz
350
530
1900
14000
Measurement Time vs. Span for 101 Data Points (typical)
Frequency Span Time (ms)
40 MHz to 40 GHz
20 GHz to 40 GHz
10 GHz to 11 GHz
500
400
250
2
TEST PORT CHARACTERISTICS
Connector
GPC−7 2 >52 >44 >52 ±0.003 ±0.004 >115
GPC−7 2 >60 >60 >60 ±0.001 ±0.001 >115
LRL Calibration 18 >60 >60 >60 ±0.001 ±0.001 >112
N-Type* 2 >44 >36 >44 ±0.004 ±0.004 >115
3.5mm
K
Frequency Directivity Source Load
(GHz) (dB) Match (dB) Match (dB)
0.0225 >52 >44 >52 ±0.003 ±0.004 >105
18 >52 >42 >52 ±0.004 ±0.012 >112
0.0225 >46 >36 >46 ±0.004 ±0.004 >105
18 >40 >32 >40 ±0.005 ±0.012 >112
0.0225 >44 >40 >44 ±0.005 ±0.030 >105
2 >44 >40 >44 ±0.005 ±0.030 >115
20 >44 >38 >44 ±0.006 ±0.050 >110
26.5 >44 >34 >44 ±0.006 ±0.070 >102
0.0225 >42 >40 >42 ±0.005 ±0.030 >105
2 >42 >40 >42 ±0.005 ±0.050 >115
20 >42 >38 >42 ±0.006 ±0.070 >110
40 >38 >38 >38 ±0.006 ±0.080 >100
Reflection Transmission
Frequency Frequency
Tracking (dB) Tracking (dB)
Isolation
(dB)
The specifications in the table above apply when the proper
Model 34U Universal Test Port Adapters are connected, with or
without phase equal insertables, to the test set ports and
calibrated with the appropriate calibration kit at 23°C ±3°C using
the OSL calibration method with a sliding load to achieve 12-Term
error correction. (90 min warm-up time recommended)
*Standard OSL calibration, no sliding load.
MEASUREMENT CAPABILITIES
Number of Channels: Four independent measurement channels.
Parameters: S11, S21, S22, S12, or user defined combinations of
a1, a2, b1, and b2. All measurements are made without the need to
manually reverse the test device.
Measurement Frequency Range: Frequency range of measurement can be narrowed within the calibration range without
recalibration. CW mode permits single frequency measurements,
also without recalibration. In addition, the system accepts N
discrete frequency points where 2 < N < 1601.
Domains: Frequency Domain, CW Draw, and optional High Speed
Time (Distance) Domain.
Formats: Log Magnitude, Phase, Log Magnitude and Phase,
Smith Chart (Impedance), Smith Chart (Admittance), Linear Polar,
Log Polar, Group Delay, Linear Magnitude, Linear Magnitude and
Phase, Real, Imaginary, Real and Imaginary, SWR, Power.
Data Points: 1601 maximum. Data points can be switched
to a value of 801, 401, 201, 101 or 51 points without recalibration
(if 1601 points were used in the calibration). In addition, the system
accepts an arbitrary set of N discrete data points where:
2 < N < 1601. CW mode permits selection of a single data point
without recalibration.
Reference Delay: Can be entered in time or in distance (when
the dielectric constant is entered). Automatic reference delay
feature adds the correct electrical length compensation at the
push of a button. Software compensation for the electrical length
difference between reference and test is always accurate and
stable since measurement frequencies are always synthesized.
In addition, The system compensates reference phase delay for
dispersive transmission media, such as waveguide and microstrip.
Markers: Six independent markers can be used to read out
measurement data. In delta-reference mode, any one marker can
be selected as the reference for the other five. Markers can be
directed automatically to the minimum or maximum of a data trace.
Enhanced Markers: Marker search for a level or bandwidth,
displaying an active marker for each channel, and discrete or
continous (interpolated) markers.
Marker Sweep: Sweeps upward in frequency between any two
markers. Recalibration is not required during the marker sweep.
Limit Lines: Either single or segmented limit lines can be
displayed. Two limit lines are available for each trace.
Single Limit Readouts: Interpolation algorithm determines the
exact intersection frequencies of test data and limit lines.
Segmented Limits: A total of 20 segments (10 upper and 10
lower) can be generated per data trace. Complete segmented
traces can be offset in both frequency and amplitude.
Test Limits: Both single and segmented limits can be used for
PASS/FAIL testing. The active channel’s PASS or FAIL status is
indicated on CRT after each sweep. In addition, PASS/FAIL status
is output through the rear panel I/O connector as selectable TTL
levels (PASS=0V, FAIL=+5V or PASS=+5V, FAIL=0V).
Tune Mode: Tune Mode optimizes sweep speed in tuning
applications by updating forward S-parameters more frequently
than reverse ones. This mode allows the user to select the ratio of
forward sweeps to reverse sweeps after a full 12-term calibration.
The ratio of forward sweeps to reverse sweeps can be set anywhere between 1:1 to 10,000:1.
3
DISPLAY CAPABILITIES
Display Channels: Four, each of which can display any S-para-
meter or user defined parameter in any format with up to two traces
per channel for a maximum of eight traces simultaneously. 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.
LCD: Color, 8.5” diagonal.
Trace Color: The color of display traces, memory, text, markers
and limit lines are all user definable.
Trace Overlay: Displays two traces on the active channel’s gratic-
ule 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.
Scale Resolution (minimum):
Log Magnitude: 0.001 dB/div Linear Magnitude: 1 pU
Phase: 0.01° Group Delay: 0.001 ps
Time: 0.001 ms Distance: 0.1 µm
SWR: 1 pU Power: 0.05 dB
Autoscale: Automatically sets Resolution and Offset to fully
display measurement data.
Reference Position: Can be set at any graticule line.
Annotation: Type of measurement, vertical and horizontal
scale resolution, start/stop or center/span frequencies, and
reference position.
Blank Frequency Information: Blanking function removes
all references to displayed frequencies on the CRT. Frequency
blanking can only be restored through a system reset or
GPIB command.
MEASUREMENT ENHANCEMENT
Data Averaging: Averaging of 1 to 4096 averages can be
selected. Averaging can be toggled on/off with front-panel button.
A front-panel button turns data averaging on/off, and a front panel
LED indicates when averaging is active.
Video IF Bandwidth: Front panel button selects four levels of
video IF bandwidth. MAXIMUM (10 kHz), NORMAL (1 kHz),
REDUCED (100 Hz) and MINIMUM (10 Hz).
Trace Smoothing: Functions similarly to Data Averaging but
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. Front-panel button turns smoothing on/off, and frontpanel LED indicates when smoothing is active.
SOURCE CONTROL
Frequency Resolution: 1 kHz (1 Hz standard on RF units and
optional on Microwave units−Option 10A)
Source Power Level: The source power (dBm) may be set from
the 37200B front panel menu or via GPIB. Port 1 power level is
settable from +10 dB above to −15 dB below rated power (+20 dB
above to −12 dB below rated power for 37269B) with 0.05 dB
resolution. Source power ABOVE 0 dB control is allowed but
not guaranteed.
Power Accuracy: ±0.5 dB at 2 GHz at default power.
Level Test Port Power: The power, at all sweep frequencies, is
leveled to within ±1.5 dB (0.0225 to 13.5 GHz), ±2.0 dB (13.5 to
20 GHz), and ±3.0 dB (20 to 40 GHz).
Power Meter Correction: The 37200B offers a user-selectable
feature that corrects for test port power variations and slope (on
Port 1) using an external power meter. Power meter correction is
available at a user-selectable power level, if it is within the power
adjustment range of the internal source. Once the test port power
has been flattened, its level may be changed within the remaining
power adjustment range of the signal source.
Dual Source Control Capability: Dual Source Control capability
allows a user to independently control the frequencies of two
sources and the receiver without the need for an external
controller. The frequency ranges and output powers of the two
sources may be specified. A frequency sweep may be comprised
of up to five separate bands, each with independent source and
receiver settings, for convenient testing of frequency translation
devices such as mixers. Up to five sub-bands may be tested in one
sweep. This feature enables users to easily test mixers, up/down
converters, multipliers, and other frequency conversion devices.
Source #1: The 37200B’s internal source, or any of the family of
68XXXB, 69XXXA, or 6700B synthesizers.
Source #2: Any of the family of 68XXXB, 69XXXA,
or 6700B synthesizers.
Sweep Type: Linear, CW, Marker, or N-Discrete point sweep.
SOURCE PURITY
Specifications apply for all models at maximum rated power.
Harmonic and Harmonic Related: 35 dBc, (standard)
Nonharmonics: 35 dBc
Phase Noise:
>60 dBc/Hz at 10 kHz offset and 20 GHz center frequency
SOURCE FREQUENCY ACCURACY
Standard Time Base:
Aging: <1 x 10-6/day
Stability: <1 x 10-6over +15°C to +50°C range
High Stability Time Base (Option 10A):
Aging: <1 x 10-9/day
Stability: <5 x 10-9over 0° to +55°C range
4
LOG MAG
Ref= 0dBm
5dB/DIV
Available
Power
Typical
22.5 MHz 8.6 GHz
Model 37211A and 37217A Port 1 Power
LOG MAG
Ref= 0dBm
5dB/DIV
Available
Power
Typical
40 MHz
20 GHz
Model 37225B and 37247B Port 1 Power
LOG MAG
Ref= -15dBm
5dB/DIV
Available
Power
POWER RANGE
Model
37211B 0 −15 0.05
37217B 0 −15 0.05
37225B 0 −15 0.05
37247B 0 −15 0.05
37269B −15 −27 0.05
Rated Minimum Resolution
Power (dBm) Power (dBm) (dB)
POWER FLATNESS
Frequency
Range (GHz)
0.0225 to 13.5
13.5 to 20
20 to 40
Flatness
(dB)
±1.5
±2
±3
GROUP DELAY CHARACTERISTICS
Group Delay is measured by computing the phase change in
degrees across a frequency step by applying the formula:
τg = −1/360 dφ/df
Aperture: Defined as the frequency span over which the phase
change is computed at a given frequency point. The aperture can
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 aperture and the percent
of the frequency range are displayed automatically.
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 ms.
Measurement Repeatability (sweep to sweep): For continuous
measurement of a through connection, RSS fluctuations due to
phase and FM noise are:
1.41 [(
Phase Noise in deg
Accuracy:
Error in phase (deg)
Error in τg=
)2+ (
τ
x
360 (
g
Aperture in Hz
360 +[(
Aperture (Hz)
Residual FM Noise in Hz
)2]
)
τgx Aperture Freq. Error (Hz)
0.5
]
40 MHz
Typical
40 GHz
Model 37269B Port 1 Power
5
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