AGILENT N4373C

Agilent
N4373C
67 GHz Single-Mode
Lightwave Component Analyzer
for 40/100G electro-optical test
Data Sheet
General Information
Key benefits
‡
Agilent’s N4373C Lightwave Component Analyzer (LCA)
offers a modulation bandwidth of 67 GHz which makes it
the ideal choice to develop and characterize electro-optical
components, for the upcoming 40G/10GbE as defined in
IEEE802.3ba.
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Accuracy
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For these modern optical transmission systems with advanced modulation schemes it is key for the electro-optical
components to have very flat S21 transfer function in amplitude and delay. This performance can be achieved only with
electro-optical S-parameter test as provided by the N4373C
LCA.
In addition fast, accurate, repeatable and traceable characterization of these electro-optical components, like lasers,
modulators and detectors is required, to guarantee the performance with respect to modulation bandwidth, jitter, gain,
and distortion.
By optimizing the electrical and the optical design of the
N4373C for lowest noise and ripple, the accuracy has been
improved by better than a factor of 2, compared to its predecessor, the 86030A 50GHz LCA. This increased accuracy
improves the yield from tests performed with the N4373C by
narrowing margins needed to pass the tested devices.
This advanced design together with temperature-stabilized
transmitter and receiver ensures repeatable measurements
over hours without recalibration
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High absolute and relative accuracy measurements
improve the yield of development and production processes. With the excellent accuracy and reproducibility, measurement results can be compared among test
locations world wide.
High confidence and fast time-to-market with a NISTtraceable turnkey solution.
Significantly increased productivity using the fast and
easy measurement setup with an unique new calibration process leads to lower cost of test.
External optical source input option to test at customer selected wavelength.
Common PNA and LCA user interface across all
N437xB/C LCA series.
Identical LCA software and remote control across the
N437xB family simplifies integration.
Relative frequency response uncertainty:
± 0.8 dB @ 50 GHz (typ)
± 1.3 dB @ 65 GHz (typ)
Absolute frequency response uncertainty:
± 1.2 dB @ 50 GHz (typ)
± 1.8 dB @ 65 GHz (typ)
Noise floor:
-60(55) dB(A/W) for O/E measurements @ 50(65) GHz
-64(59) dB(W/A) for E/O measurements @ 50(65) GHz
Turn-key solution
Typical phase uncertainty:
±2.3°
The fully integrated “turn-key” N4373C helps reduce time
to market, compared to the time-consuming development of
a self-made setup. In addition you get a fully specified easy
transferable and reliable test instrument. With guaranteed
specifications Agilent takes the responsibility to provide
you with accurate and traceable test results that can only
be achieved in a turn key solution.
Transmitter wavelength:
1550nm ± 20 nm
1310nm ± 10 nm
1290 - 1610 nm with external source input
Built-in optical power meter
For fast transmitter power verification
High productivity
The N4373C achieves fast measurements by including the
E8361C Performance Network Analyzer. A unique new calibration concept significantly reduces setup time to a maximum of several minutes, depending on the selected measurement parameters. This results in increased productivity
in R&D or on the manufacturing floor.
Using the advanced measurement capabilities of the network analyzer, all S-parameter related characteristics of
the device under test, like responsivity and 3dB-cutoff frequency, can be qualified with the new N4373C Lightwave
Component Analyzer from 10 MHz to 67 GHz.
Powerful remote control:
State of the art programming interface based on Microsoft
.NET or COM.
Warranty:
1 year warranty is standard for the N4373C Lightwave
Component Analyzer.
Extension to 3 or 5 years available on request.
Network analyzer
The N4373C LCA is based on the new E8361C network analyzer with an identical and well known user interface across
all Agilent network analyzers.
2
Agilent N4373C Applications
Agilent N4373C Features
In digital photonic transmission systems, the performance
is ultimately determined by Bit Error Ratio Test (BERT). As
this parameter describes the performance of the whole system, it is necessary to design and qualify subcomponents
like modulators and PIN detectors, which are analog by nature, with different parameters that reflect their individual
performance.
These components significantly influence the overall performance of the transmission system with the following parameters:
Turnkey solution
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In today’s highly competitive environment, short time-tomarket with high quality is essential for new products. Instead of developing a home-grown measurement solution,
which takes a lot of time and is limited in transferability and
support, a fully specified and supported solution helps to focus resources on faster development and on optimizing the
manufacturing process.
In the N4373C all optical and electrical components are
carefully selected and matched to each other to minimize
noise and ripple in the measurement traces. Together with
the temperature stabilized environment of the core components, this improves the repeatability and the accuracy
of the overall system. Extended factory calibration data at
various optical power levels ensures accurate and reliable
measurements that can only be achieved with an integrated
solution like the N4373C.
3dB bandwidth of the electro-optical transmission.
Relative frequency response, quantifying the electrooptical shape of the conversion.
Absolute frequency response, relating to the conversion efficiency of signals from the input to the output,
or indicating the gain of a receiver.
Electrical reflection at the RF port.
Group delay of the electro-optical transfer function.
Easy calibration
An LCA essentially measures the conversion relation between optical and electrical signals. This is why user calibration of such systems can evolve into a time consuming
task. With the new calibration process implemented in the
N4373C, the tasks that have to be done by the user are reduced to one pure electrical calibration. The calibration with
an electrical calibration module is automated and needs only
minimal manual interaction.
Only a careful design of these electro-optical components
over a wide modulation signal bandwidth guarantees successful operation in the transmission system.
Electro-optical components
The frequency response of detector diodes, modulators and
directly modulated lasers typically depends on various parameters, like bias voltages, optical input power, operating
current and ambient temperature. To determine the optimum
operating point of these devices, an LCA helps by making
a fast characterization of the electro-optic transfer function
while optimizing these operating conditions.
In manufacturing it is important to be able to monitor the
processes in regular time slots to keep up the throughput
and yield. In this case the LCA is the tool of choice to monitor transmission characteristic and absolute responsivity of
the manufactured device.
Built-in performance verification
Sometimes it is necessary to make a quick verification of the
validity of the calibration and the performance of the system.
The N4373C’s unique calibration process allows the user to
perform a self-test without external reference devices. This
gives full confidence that the system performance is within
the user’s required uncertainty bands.
State-of-the-art remote control
Testing the frequency response of electro-optical components under a wide range of parameters, which is often
necessary in qualification cycles, is very time consuming.
To support the user in minimizing the effort for performing this huge number of tests, all functions of the LCA can
be controlled remotely via LAN over the state-of-the-art
Microsoft .NET or COM interface. This interface is identical
for all LCA of the N437xB/C series.
Based on programming examples for VBA with Excel, Agilent VEE and C++, it is very easy for every user to build applications for their requirements.
These examples cover applications like integration of complete LCA measurement sequences.
Electrical components
Electrical components such as amplifiers, filters and transmission lines are used in modern transmission systems and
require characterization to ensure optimal performance.
Typical measurements are bandwidth, insertion loss or gain,
impedance match and group delay.
3
Integrated optical power meter
In applications where optical power dependence characterization is needed, the average power meter can be used to
set the exact average output power of the LCA transmitter
by connecting the LCA optical transmitter output, optionally
through an optical attenuator, to the LCA optical receiver input. By adjusting the transmitter output power in the LCA
user interface or the optical attenuation, the desired transmitter optical power can be set.
In cases where an unexpectedly low responsivity is measured from the device under test, it is very helpful to get a
fast indication of the CW optical power that is launched into
the LCA receiver. The cause might be a bad connection or a
bent fiber in the setup. For this reason too, a measurement
of the average optical power at the LCA receiver is very helpful for fast debugging of the test setup.
Selectable output power of the transmitter
Most PIN diodes and receiver optical subassemblies need to
be characterized at various average optical power levels. In
this case it is necessary to set the average input power of
the device under test to the desired value. The variable average optical output power of the LCA transmitter offers this
feature. Together with an external optical attenuator, this
range can be extended to all desired optical power levels.
Group delay and length measurements
In some applications it is necessary to determine the electrical or optical length of a device. With the internal length
calibration of the electro-optical paths with reference to the
electrical and optical inputs or outputs, it is possible to determine the length of the device under test
External optical source input
For applications where test of opto-electric devices need to
be done at a specific optical wavelength like proposed in
the IEEE 802.3ba standard, the N4373C-050 option offers an
external optical input to the internal modulator where an external tunable laser can be applied. As modulators are polarization sensitive devices, this input is a PMF input to a PMF
optical switch to maintain the polarization at the internal
modulator and keep loss at a minimum.
This external optical source input is required when O/E
devices with integrated filter are to be characterized, or
generaly when the O/E converter needs to be tested at different wavelengths than the internal source.
4
Definitions
Explanation of terms
Generally, all specifications are valid at the stated operating and measurement conditions and settings, with uninterrupted line voltage.
Responsivity
For electro-optical devices (e.g. modulators ) this describes
the ratio of the optical modulated output signal amplitude
compared to the RF input amplitude of the device.
For opto-electrical devices (e.g. photodiodes) this describes
the ratio of the RF amplitude at the device output to the amplitude of the modulated optical signal input.
Specifications (guaranteed)
Describes warranted product performance that is valid under
the specified conditions.
Specifications include guard bands to account for the expected statistical performance distribution, measurement
uncertainties changes in performance due to environmental
changes and aging of components.
Relative frequency response uncertainty
Describes the maximum deviation of the shape of a measured trace from the (unknown) real trace. This specification
has strong influence on the accuracy of the 3-dB cut-off frequency determined for the device under test.
Typical values (characteristics)
Characteristics describe the product performance that is
usually met but not guaranteed. Typical values are based on
data from a representative set of instruments.
Absolute frequency response uncertainty
Describes the maximum difference between any amplitude
point of the measured trace and the (unknown) real value.
This specification is useful to determine the absolute responsivity of the device versus modulation frequency.
General characteristics
Give additional information for using the instrument. These
are general descriptive terms that do not imply a level of
performance.
Frequency response repeatability
Describes the deviation of repeated measurement without
changing any parameter or connection relative to the average of this measurements.
Minimum measurable frequency response
Describes the average measured responsivity when no modulation signal is present at the device under test. This represents the noise floor of the measurement system.
Definition of LCA input and output names
LCA electrical port A
LCA optical output
LCA electrical port B
LCA optical input
5
Agilent N4373C Specifications
Measurement capabilities
3dB cut-off frequency (S21),
Responsivity (S21),
Electrical reflection (S11 or S22),
Group Delay vs. frequency,
Insertion Loss (IL),
Transmission bandwidth,
all electrical S-parameter measurements.
Measurement conditions
‡ Network analyzer set to -8 dBm electrical output
power
‡ Modulation frequency range from 10 MHz to 65 GHz
‡ Number of averages: 1
‡ 100 Hz IFBW (“Reduce IF bandwidth at low frequency”
enabled) with modulation frequency step size 10 MHz
and measurement points on a 10 MHz raster (if not
differently stated).
‡ Network analyzer set to “stepped sweep” – sweep
moves in discrete steps”
‡ Port 2 of network analyzer configured in reverse
coupler configuration (“RCVB B in” to “CPLR THRU”,
“SOURCE OUT” to “CPLR ARM”)
‡ After full two-port electrical calibration using an Electronic Calibration Module, Agilent N4694A, at constant
temperature (±1° C).
‡ Modulation-bias optimization set to “every sweep”
‡ Using the supplied flexible test port cables 1.85mm f m
(Part Number N4697-60200).
‡ Measurement frequency grid equals electrical calibration grid.
‡ Tested from Port 1 to Port 2.
‡ DUT signal delay ≤ 0.1/IF-BW.
‡ Specified temperature range: +20° C to +26° C.
‡ After warm-up time of 90 minutes.
‡ Using high quality electrical and optical connectors in
perfect condition.
‡ Using internal laser source.
Target test devices
Transmitter (E/O)
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Receiver (O/E)
‡ PIN diodes
‡ Avalanche photodiodes (APD)
‡ Receiver optical subassemblies (ROSA)
Optical (O/O)
‡ Passive optical components
‡ Optical fibers and filters
‡ Optical transmission systems
6
Transmitter and Receiver Specifications
Optical Test set
Option -302, -392
Operation frequency range
10 MHz to 67 GHz
Connector type
optical input
optical output
SMF angled with Agilent versatile connector interface
optical source input (rear)
PMF angled, with Agilent versatile connector interface,
polarization orientation aligned with connector key
RF
1.85 mm male
LCA optical input
Operating input wavelength range
1290 nm to 1610 nm [f4]
Maximum linear average input power [f1]
Optical input 1:
Optical input 2:
+4 dBm @ 1310 nm
+5 dBm @ 1550 nm
+14 dBm @ 1310 nm
+15 dBm @ 1550 nm
Maximum safe average input power
Optical input 1:
Optical input 2:
+7 dBm
+17 dBm
Optical return loss (typ.) [f1]
> 25 dBo
[f1]
Average power measurement range
Optical input 1:
Optical input 2:
Average power measurement
uncertainty (typ.) [f1]
±0.5 dBo
-25 dBm to +5 dBm on optical input 1
-15 dBm to +15 dBm on optical input 2
LCA optical output (internal source)
Optical modulation index (OMI) (typ.)
Output wavelength
> 5 % @ -8 dBm RF power @ 1 GHz modulation frequency
(option -100, 102) (1310 ± 10) nm
(option -101, 102) (1550 ± 20) nm
Average output power range
-1 dBm to +5 dBm @ 1550 nm
-2 dBm to +4 dBm @ 1310 nm
Average output power uncertainty (typ.)[f2]
±0.5 dBo
Average output power stability,
15 minutes (typ.)
±0.5 dBo
External optical source input (-050)
Required optical input power [f3]
+8 to + 15 dBm
Optical input power damage level
+20 dBm
Typical loss at quadrature bias point
9 dB
Operating input wavelength range
1290 nm to 1610 nm [f4]
LCA RF test port input
Maximum safe input level at port A or B
+15 dBm RF, 7V DC
[f1] Wavelength within range as specified for LCA optical output.
[f2] After modulator optimization.
[f3] Required source characteristics: SMSR > 35dB, linewidth < 10MHz, power stability < 0.1dB pp, PER > 20dB, unmodulated, single mode.
[f4] Excluding water absorption wavelength.
7
Specifications for electro to optical measurements at 1310 nm
N4373C system with network analyzer
(E/O mode)
E8361C/A -014
Specifications are valid under the stated measurement conditions.
‡ At optical input 1 (“+ 7 dBm max”). At optical input 2 (“+ 17 dBm max”), specifications are typically the same for
10 dB higher incident average and modulated optical power.
‡ For wavelength:
(1310 ±10) nm
(option -100,102).
System performance
Relative frequency
response uncertainty
Absolute frequency
response uncertainty
0.05 GHz to
0.2 GHz
50 GHz to
65 GHz
±1.0 dBe
±1.1 dBe
±1.1 dBe
±2.4 dBe
(±0.7 dBe typ) (±0.8 dBe typ) (±0.8 dBe typ) (±1.7 dBe typ)
≥ -34 dB(W/A)
(typical)
±0.8 dBe
±0.8 dBe
±0.8 dBe
±0.8 dBe
±1.8 dBe
≥ -44 dB(W/A)
(typical)
±0.9 dBe
±0.9 dBe
±0.9 dBe
±2.2 dBe
±4.0 dBe
±1.7 dBe typ
±2.4 dBe
±2.6 dBe
±2.7 dBe
±3.2 dBe
(±1.7 dBe typ) (±1.8 dBe typ) (±1.9 dBe typ) (±2.2 dBe typ)
DUT response
≥ 24 dB(W/A) [f1]
±0.03 dBe
±0.03 dBe
±0.05 dBe
±0.15 dBe
±0.25 dBe
≥ -34 dB(W/A)
±0.03 dBe
±0.03 dBe
±0.11 dBe
±0.4 dBe
±0.8 dBe
≥ -44 dB(W/A)
±0.03 dBe
±0.03 dBe
±0.6 dBe
±1.3 dBe
±2.2 dBe
-64 dB(W/A)
-64 dB(W/A)
-64 dB(W/A)
-64 dB(W/A)
-59 dB(W/A)
≥-24 dB(W/A) [f1]
±3.5°
±3.0°
±2.7°
±3.7°
±5.5°
≥-34 dB(W/A)
±3.5°
±3.5°
±2.7°
±4.8°
±9.0°
DUT response
Group delay uncertainty
[f4]
20 GHz to
50 GHz
≥ -24 dB(W/A) [f1] ±0.8 dBe typ.
Minimum measurable frequency
response (noise floor ) [f2] [f4]
[f1]
[f2]
[f3]
0.7 GHz to
20 GHz
DUT response
Frequency response DUT response
repeatability (typ)
≥ -24 dB(W/A)[f1]
Phase uncertainty
(typ.) [f3]
0.2 GHz to
0.7 GHz
Derived from phase uncertainty, see section
“Group delay uncertainty”.
Example: ±2.0° → ±8 ps (1 GHz aperture)
For DUT response max. -13 dB(W/A).
IFBW = 10 Hz.
Except phase wrap aliasing (example: a DUT group delay of 5 ns (1 m cable length) requires a frequency step size of ≤ 0.2 GHz to avoid phase wraps). Excluding a
constant group delay offset of <±0.3 ns typ. (cable length uncertainty < ±0.06 m). A constant group delay offset leads to a phase offset ∆φ = 360° × ∆GD × fmod
(in deg).
Average value over frequency range.
8
Specifications for electro to optical measurements at 1550 nm
N4373C system with network analyzer
(E/O mode)
E8361C/A -014
Specifications are valid under the stated measurement conditions.
‡ At optical input 1 (“+ 7 dBm max”). At optical input 2 (“+ 17 dBm max”), specifications are typically the same for
10 dB higher incident average and modulated optical power.
‡ For wavelength:
(1550 ±20) nm
(option -101, 102).
System performance
Relative frequency
response uncertainty
Absolute frequency
response uncertainty
0.05 GHz to
0.2 GHz
50 GHz to
65 GHz
±0.8 dBe
±0.8 dBe
±1.0 dBe
±1.6 dBe
(±0.6 dBe typ) (±0.6 dBe typ) (±0.7 dBe typ) (±1.1 dBe typ)
≥ -36 dB(W/A)
(typical)
±0.7 dBe
±0.6 dBe
±0.6 dBe
±0.9 dBe
±1.3 dBe
≥ -46 dB(W/A)
(typical)
±0.7 dBe
±0.7 dBe
±0.7 dBe
±1.6 dBe
±2.7 dBe
±1.2 dBe typ
±1.8 dBe
±1.8 dBe
±1.9 dBe
±2.7 dBe
(±1.2 dBe typ) (±1.2 dBe typ) (±1.2 dBe typ) (±1.8 dBe typ)
DUT response
≥ -26 dB(W/A) [f1]
±0.02 dBe
±0.02 dBe
±0.02 dBe
±0.1 dBe
±0.2 dBe
≥ -36 dB(W/A)
±0.02 dBe
±0.02 dBe
±0.02 dBe
±0.3 dBe
±0.5 dBe
≥ -46 dB(W/A)
±0.02 dBe
±0.02 dBe
±0.1 dBe
±1 dBe
±2.0 dBe
-64 dB(W/A)
-64 dB(W/A)
-64 dB(W/A)
-64 dB(W/A)
-59 dB(W/A)
≥-26 dB(W/A) [f1]
±3.5°
±3.0°
±2.3°
±3.2°
±4.5°
≥-36 dB(W/A)
±5.5°
±3.5°
±2.3°
±4.2°
±6.5°
DUT response
Group delay uncertainty
[f4]
20 GHz to
50 GHz
≥ -26 dB(W/A) [f1] ±0.7 dBe typ.
Minimum measurable frequency
response (noise floor ) [f2] [f4]
[f1]
[f2]
[f3]
0.7 GHz to
20 GHz
DUT response
Frequency response DUT response
repeatability (typ)
≥ -26 dB(W/A)[f1]
Phase uncertainty
(typ.) [f3]
0.2 GHz to
0.7 GHz
Derived from phase uncertainty, see section
“Group delay uncertainty”.
Example: ±2.0° → ±8 ps (1 GHz aperture)
For DUT response max. -13 dB(W/A).
IFBW = 10 Hz.
Except phase wrap aliasing (example: a DUT group delay of 5 ns (1 m cable length) requires a frequency step size of ≤ 0.2 GHz to avoid phase wraps). Excluding a
constant group delay offset of <±0.3 ns typ. (cable length uncertainty < ±0.06 m). A constant group delay offset leads to a phase offset ∆φ = 360° × ∆GD × fmod
(in deg).
Average value over frequency range.
9
Specifications for optical to electrical measurements at 1310 nm
N4373C system with network analyzer
(O/E mode)
E8361C/A -014
Specifications are valid under the stated measurement conditions.
‡ For external source optical input all specifications are typical [f2][f5][f6].
‡ For wavelength:
(1310 ±10) nm
(option -100,102)
System performance
Relative frequency
response uncertainty [f2]
0.05 GHz to
0.2 GHz
0.2 GHz to
0.7 GHz
0.7 GHz to
20 GHz
20 GHz to
50 GHz
50 GHz to
65 GHz
±0.8 dBe typ.
±1.0 dBe
(±0.7 dBe [f7] )
±1.1 dBe
(±0.8 dBe [f7] )
±1.7 dBe
(±1.2 dBe [f7])
±2.2 dBe
(±1.5 dBe [f7])
≥ -29 dB(A/W)
(typical)
±0.8 dBe
±0.7 dBe
±0.8 dBe
±1.3 dBe
±1.6 dBe
≥ -39 dB(A/W)
(typical)
±0.9 dBe
±0.9 dBe
±0.9 dBe
±1.7 dBe
±2.8 dBe
(±1.5 dBe [f7] )
±2.4 dBe
(±1.5 dBe [f7])
±2.4 dBe
(±1.5 dBe [f7])
±2.8 dBe
(±1.8 dBe [f7])
±3.2 dBe
(±2.1 dBe [f7])
DUT response
≥ -19 dB(A/W) [f1]
Absolute
DUT response
frequency response
≥ -29 dB(A/W) [f1]
uncertainty f2]
Frequency response repeatability (typ) f2]
DUT response
≥ -19 dB(A/W)[f1]
±0.03 dBe
±0.03 dBe
±0.05 dBe
±0.3 dBe
±0.5 dBe
≥ -29 dB(A/W)
±0.03 dBe
±0.03 dBe
±0.15 dBe
±0.5 dBe
±0.7 dBe
≥ -39 dB(A/W))
±0.03 dBe
±0.03 dBe
±0.3 dBe
±0.5 dBe
±0.8 dBe
-60 dB(A/W)
-60 dB(A/W)
-60 dB(A/W)
-60 dB(A/W)
-55 dB(A/W)
±3.5°
±3.0°
±2.7°
±4.4°
±6.0°
±5.5°
±3.5°
±2.7°
±4.9°
±7.5°
Minimum measurable frequency
response (noise floor ) [f2] [f3][f8]
Phase uncertainty
(typ.) [f2,f4]
DUT response
≥-19 dB(A/W) [f1]
≥-29 dB(A/W)
Group delay uncertainty
[f1]
[f2]
[f3]
[f4]
[f5]
[f6]
[f7]
[f8]
Derived from phase uncertainty, see section
“Group delay uncertainty”.
Example: ±2.0° → ±8 ps (1 GHz aperture)
For DUT response max. -10 dB(A/W).
For +4 dBm average output power from LCA optical output.
IFBW = 10 Hz.
Except phase wrap aliasing (example: a DUT group delay of 5 ns (1 m cable length) requires a frequency step size of ≤0.2 GHz to avoid phase wraps). Excluding a
constant group delay offset of <±0.3 ns typ. (cable length uncertainty <±0.06 m). A constant group delay offset leads to a phase offset∆φ = 360° × ∆GD × fmod.(in deg).
After CW responsivity and user calibration with external source.
Requires option -100 or -102.
Typical with internal source.
Average value over frequency range.
10
Specifications for optical to electrical measurements at 1550 nm
N4373C system with network analyzer
(O/E mode)
E8361C/A -014
Specifications are valid under the stated measurement conditions.
‡ For external source optical input all specifications are typical [f2][f5][f6].
‡ For wavelength:
(1550 ±20) nm
(option -101,102)
System performance
Relative frequency
response uncertainty [f2]
0.05 GHz to
0.2 GHz
0.2 GHz to
0.7 GHz
0.7 GHz to
20 GHz
20 GHz to
50 GHz
50 GHz to
65 GHz
±0.7 dBe typ.
±0.8 dBe
(±0.6 dBe [f7])
±0.9 dBe
(±0.7 dBe [f7])
±1.2 dBe
(±0.8 dBe [f7])
±1.9 dBe
(±1.3 dBe [f7])
≥ -25 dB(A/W)
(typical)
±0.8 dBe.
±0.7 dBe
±0.8 dBe
±0.9 dBe
±1.4 dBe
≥ -35 dB(A/W)
(typical)
±0.8 dBe.
±0.7 dBe
±0.8 dBe
±1.3 dBe
±1.7 dBe
(±1.1 dBe [f7] )
±1.9 dBe
(±1.1 dBe [f7])
±1.9 dBe
(±1.1 dBe [f7])
±2.0 dBe
(±1.2 dBe [f7])
±2.8 dBe
(±1.6 dBe [f7])
DUT response
≥ -15 dB(A/W)[f1]
Absolute
DUT response
frequency response
≥ -25 dB(A/W) [f1]
uncertainty f2]
Frequency response repeatability (typ) f2]
DUT response
≥ -15 dB(A/W)[f1]
±0.02 dBe
±0.02 dBe
±0.02 dBe
±0.3 dBe
±0.5 dBe
≥ -25 dB(A/W)
±0.02 dBe
±0.02 dBe
±0.02 dBe
±0.5 dBe
±0.7 dBe
≥ -35 dB(A/W))
±0.02 dBe
±0.02 dBe
±0.06 dBe
±0.5 dBe
±0.8 dBe
-60 dB(A/W)
-60 dB(A/W)
-60 dB(A/W)
-60 dB(A/W)
-55 dB(A/W)
±3.5°
±3.0°
±2.4°
±3.2°
±5.0°
±5.5°
±3.5°
±2.4°
±5.0°
±7.0°
Minimum measurable frequency
response (noise floor ) [f2] [f3][f8]
Phase uncertainty
(typ.) [f2,f4]
DUT response
≥-15 dB(A/W) [f1]
≥-25 dB(A/W)
Group delay uncertainty
[f1]
[f2]
[f3]
[f4]
[f5]
[f6]
[f7]
[f8]
Derived from phase uncertainty, see section
“Group delay uncertainty”.
Example: ±2.0° → ±8 ps (1 GHz aperture)
For DUT response max. -10 dB(A/W).
For +5 dBm average output power from LCA optical output..
IFBW = 10 Hz.
Except phase wrap aliasing (example: a DUT group delay of 5 ns (1 m cable length) requires a frequency step size of ≤0.2 GHz to avoid phase wraps). Excluding a
constant group delay offset of <±0.3 ns typ. (cable length uncertainty <±0.06 m). A constant group delay offset leads to a phase offset∆φ = 360° × ∆GD × fmod.(in deg).
After CW responsivity and user calibration with external source.
Requires option -101 or -102.
Typical with internal source.
Average value over frequency range.
11
Specifications for optical to optical measurements at 1310 nm
N4373C system with network analyzer
(O/O mode)
E8361C/A -014
Specifications are valid under the stated measurement conditions.
‡ At optical input 1 (“+7 dBm max”). At optical input 2 (“+17 dBm max”), specifications are typically the same for 10 dB
higher incident average and modulated optical power.
‡ For external source optical input all specifications are typical [f2][f5][f6].
‡ For wavelength:
(1310 ±10) nm
(option -100, 102)
System performance
Relative
frequency response
uncertainty f2]
Absolute
frequency response
uncertainty f2]
0.05 GHz to
0.2 GHz
0.2 GHz to
0.7 GHz
0.7 GHz to
20 GHz
20 GHz to
50 GHz
50 GHz to
65 GHz
≥ -3 dBe
( ≥-1.5 dBo) [f4]
±0.4 dBe typ.
(±0.2 dBo)
±0.4 dBe
(±0.2 dBo)
±0.4 dBe
(±0.2 dBo)
±0.5 dBe
(±0.25 dBo)
±0.6 dBe
(±0.3 dBo)
≥ -13 dBe
( ≥-6.5 dBo)
(typical)
±0.2 dBe
(±0.1 dBo).
±0.2 dBe
(±0.1 dBo)
±0.2 dBe
(±0.1 dBo)
±0.7 dBe
(±0.35 dBo)
±1.0 dBe
(±0.5 dBo)
≥ -23 dBe
( ≥-11.5 dBo)
(typical)
±0.2 dBe
(±0.1 dBo).
±0.2 dBe
(±0.1 dBo)
±0.2 dBe
(±0.1 dBo)
±0.9 dBe
(±0.45 dBo)
±1.5 dBe
(±0.75 dBo)
±0.9 dBe typ.
(±0.45 dBo)
±0.9 dBe
(±0.45 dBo)
±0.9 dBe
(±0.45 dBo)
±1.0 dBe
(±0.50 dBo)
±1.2 dBe
(±0.6 dBe)
±0.02 dBe
±0.02 dBe
±0.03 dBe
±0.15 dBe
±0.3 dBe
≥ -13 dBe
( ≥-6.5 dBo)
±0.03 dBe
±0.03 dBe
±0.1 dBe
±0.4 dBe
±0.8 dBe
≥ -23 dBe
( ≥-11.5 dBo)
±0.03 dBe
±0.03 dBe
±0.1 dBe
±1 dBe
±1.5 dBe
-55 dBe typ.
(-27.5 dBo)
-42 dBe
(-21 dBo)
-42 dBe
(-21 dBo)
-42 dBe
(-21 dBo)
-36 dBe
(-18 dBo )
DUT response
DUT response
≥ -3 dBe
(≥-1.5 dBo)
[f4]
Frequency response DUT response
repeatability (typ.) f2]
≥ -3 dBe
( ≥-1.5 dBo) [f4]
Minimum measurable frequency
response (noise floor ) [f1] [f2][f7]
Phase uncertainty
(typ.) [f2,f3]
DUT response
≥ -3 dBe [f4]
(≥-1.5 dBo)
±3.5°
±3.0°
±2.2°
±2.7°
±3.5°
≥ -13 dBe
(≥-6.5 dBo)
±5.5°
±3.5°
±2.2°
±3.3°
±4.0°
Group delay uncertainty
[f1]
[f2]
[f3]
[f4]
[f5]
[f6]
[f7]
Derived from phase uncertainty, see section
“Group delay uncertainty”.
Example: ±2.0° → ±8 ps (1 GHz aperture)
IFBW = 10 Hz.
For +4 dBm average output power from LCA optical output.
Except phase wrap aliasing (example: a DUT group delay of 5 ns (1 m cable length) requires a frequency step size of ≤ 0.2 GHz to avoid phase wraps).
For DUT response max. +6 dBe (+3 dBo) gain.
After CW responsivity and user calibration with external source.
Requires option -100 or -102.
Average value over frequency range.
12
Specifications for optical to optical measurements at 1550 nm
N4373C system with network analyzer
(O/O mode)
E8361C/A -014
Specifications are valid under the stated measurement conditions.
‡ At optical input 1 (“+7 dBm max”). At optical input 2 (“+17 dBm max”), specifications are typically the same for 10 dB
higher incident average and modulated optical power.
‡ For external source optical input all specifications are typical [f2][f5][f6]
‡ For wavelength:
(1550 ±20) nm
(option -101,102)
System performance
Relative
frequency response
uncertainty f2]
Absolute
frequency response
uncertainty f2]
0.05 GHz to
0.2 GHz
0.2 GHz to
0.7 GHz
0.7 GHz to
20 GHz
20 GHz to
50 GHz
50 GHz to
65 GHz
≥ -3 dBe
( ≥-1.5 dBo) [f4]
±0.3 dBe typ.
(±0.15 dBo)
±0.3 dBe
(±0.15 dBo)
±0.3 dBe
(±0.15 dBo)
±0.4 dBe
(±0.2 dBo)
±0.6 dBe
(±0.3 dBo)
≥ -13 dBe
( ≥-6.5 dBo)
(typical)
±0.2 dBe
(±0.1 dBo).
±0.2 dBe
(±0.1 dBo)
±0.2 dBe
(±0.1 dBo)
±0.6 dBe
(±0.3 dBo)
±1.0 dBe
(±0.5 dBo)
≥ -23 dBe
( ≥-11.5 dBo)
(typical)
±0.2 dBe
(±0.1 dBo).
±0.2 dBe
(±0.1 dBo)
±0.3 dBe
(±0.15 dBo)
±0.7 dBe
(±0.35 dBo)
±1.3 dBe
(±0.65 dBo)
±0.4 dBe typ.
(±0.2 dBo)
±0.4 dBe
(±0.2 dBo)
±0.4 dBe
(±0.2 dBo)
±0.7 dBe
(±0.35 dBo)
±0.9 dBe
(±0.45 dBe)
±0.02 dBe
±0.02 dBe
±0.02 dBe
±0.1 dBe
±0.2 dBe
≥ -13 dBe
( ≥-6.5 dBo)
±0.02 dBe
±0.02 dBe
±0.02 dBe
±0.3 dBe
±0.5 dBe
≥ -23 dBe
( ≥-11.5 dBo)
±0.02 dBe
±0.02 dBe
±0.1 dBe
±1.0 dBe
±2.0 dBe
-55 dBe typ.
(-27.5 dBo)
-42 dBe
(-21 dBo)
-42 dBe
(-21 dBo)
-42 dBe
(-21 dBo)
-36 dBe
(-18 dBo )
DUT response
DUT response
≥ -3 dBe
(≥-1.5 dBo)
[f4]
Frequency response DUT response
repeatability (typ.) f2]
≥ -3 dBe
( ≥-1.5 dBo) [f4]
Minimum measurable frequency
response (noise floor ) [f1] [f2][f7]
Phase uncertainty
(typ.) [f2,f3]
DUT response
≥ -3 dBe [f4]
(≥-1.5 dBo)
±3.5°
±3.0°
±2.2°
±2.6°
±3.0°
≥ -13 dBe
(≥-6.5 dBo)
±5.5°
±3.5°
±2.2°
±3.0°
±3.5°
Group delay uncertainty
[f1]
[f2]
[f3]
[f4]
[f5]
[f6]
[f7]
Derived from phase uncertainty, see section
“Group delay uncertainty”.
Example: ±2.0° → ±8 ps (1 GHz aperture)
IFBW = 10 Hz.
For +5 dBm average output power from LCA optical output.
Except phase wrap aliasing (example: a DUT group delay of 5 ns (1 m cable length) requires a frequency step size of ≤ 0.2 GHz to avoid phase wraps).
For DUT response max. +6 dBe (+3 dBo ) gain.
After CW responsivity and user calibration with external source.
Requires option -100 or -102.
Average value over frequency range.
13
Specifications for electrical-electrical measurements (E/E mode)
All specifications of the E8361C-014 Network Analyzer apply.
Please see the corresponding Network Analyzer data sheet and User’s Guide.
Group delay uncertainty
For more details see specifications of the E8361C.
Group delay
Group delay is computed by measuring the phase change within a specified
aperture (for aperture see below:
GD [s] =
Phase change [deg]
----------------------------------------Aperture [Hz] * 360
(1)
Group delay uncertainty
Is calculated from the specified phase uncertainty and from the aperture (for aperture see below):
GD [±s] =
Phase uncertainty [±deg]
--------------------------------------- *sqrt(2)
Aperture [Hz] * 360
(2)
Aperture
Determined by the frequency span and the number of points per sweep:
Aperture:
(frequency span) / (number of points–1)
GD Range
The maximum group delay is limited to measuring no more than ±180 degrees of
phase change within the selected aperture (see Equation 1).
14
General Characteristics
1x RoHS addendum for Photonic T&M Accesoires
1x RoHS addendum for Photonic T&M products
Assembled dimensions: (H x W x D)
41.3 cm x 43.8 cm x 47.3 cm,
(16.3 in x 17.3 in x 18.7 in)
Additional, option dependent shipping contents:
-021 straight connector:
2x N4373-87907 0.5m FC/APC - FC/PC patch cord
1x 1005-0256 FC/FC feedthrougth adapter
-022 angled connector:
2x N4373-87906 0.5m FC/APC - FC/APC patch cord
1x 1005-1027 FC adaptor for angled-PC
-050 external optical source input
1x PMF patchcord 1.0m FC/APC narrow key
1x 81000NI optical adaptor FC
Weight
Product net weight:
38 kg (83.6 lbs)
Packaged product:
58 kg (127.6 lbs)
Power Requirements
100 to 240 V~, 50 to 60 Hz
2 power cables
E8361C-014
max. 350 VA
Optical test set: max. 40 VA
LCA connector types at optical testset
LCA electrical input
1.85 mm (f)
LCA electrical output
1.85 mm (m)
LCA optical input 1
9um single-mode angled [1],
with Agilent universal adapter
LCA optical input 2
9um single-mode angled [1],
with Agilent universal adapter
LCA optical output
9um single-mode angled[1], with
Agilent universal adapter
LCA external source input 9um polarization maintaining
(Option -050 only)
single-mode angled, with
Agilent universal adapter
Network-analyzer
Option 302
E8361C-014
Storage temperature range
-40° C to +70° C
Operating temperature range
+5° C to +35° C
[1]
The optical test set always has angled connectors.
Depending on the selected option (-021 straight, -022 angled)
the appropriate jumper cable will be delivered.
This jumper cable must always be used in front to the optical
test set to protect the connectors at the optical test set
Humidity
15 % to 80 % relative humidity, non-condensing
Altitude (operating)
0 ... 2000 m
Laser Safety Information
All laser sources listed above are classified as Class 1M
according to IEC 60825 1 (2001).
All laser sources comply with 21 CFR 1040.10 except for
deviations pursuant to Laser Notice No. 50,
dated 2001-July-26.
Recommended re-calibration period
1 year
Shipping contents
1x Network-analyzer E8361C-014
1x N4373C optical test set
2x N4697-60200 f-m flexible test port MW cable
2x 85058-60121 test port adapter
1x N5520B-FG 1.85 mm (f)-(f), adapter DC – 67GHz
3x 81000NI optical adaptor
1x 8121-1242 USB cable
1x 1150-7896 Keyboard
1x 1150-7799 Mouse
1x E5525-10285 UK 6 report
1x 4373B-90A01 Getting started
1x 4373B-90CD1 Support CD
2x Local power cord
15
Mechanical Outline Drawings, option -302, -392 (all dimensions in mm)
16
Ordering informations
The N4373C consists of an optical test set and an electrical network analyzer which are mechanically connected.
To protect your network analyzer investment, Agilent offers the integration of an already owned PNA with the optical test
set as listed below.
All systems have 1 year warranty.
N4373C LCA ordering options
Network-analyzer options
N4373C - 302
67 GHz, 2 port PNA (E8361C-014)
Network-analyzer integration options
N4373C - 392
Integration of customer’s 67 GHz, 2 port PNA
(E8361A/C-014, 010)
all other NWA and options call factory
Optical wavelength options
N4373C-100
1310nm Single Wavelength Source
N4373C-101
1550nm Single Wavelength Source
N4373C-102
1310 & 1550 nm Dual Wavelength Source
Configuration independent options
N4373C-010
Time Domain Operation for Networkanalyzer
N4373C-050
Testset with external optical source Input
N4373C-021
Straight Fiber Interface single mode
N4373C-022
Angled Fiber Interface single mode
Service and Repair
R1280A
1 year Return-to-Agilent warranty extended to 3 or 5 years
R1282A
Calibration up front support plan 3 or 5 year coverage
Required accessories ( to be ordered separately)
N4694A
2 port MW Electrical Calibration Module
( -00F recommended)
17
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