Atec Agilent-8703A User Manual
1300 nm or 1550 nm carrier
130 MHz to 20 GHz
modulation bandwidth
Single wavelength configuration
Agilent 8703A
Lightwave Component Analyzer
Technical Specifications
A powerful combination of calibrated 20 GHz lightwave
and microwave measurement capabilities is described in
this Agilent 8703A technical specifications. This includes
the following models and options:
Agilent 8703A Lightwave Component Analyzer
• Option 100 Adds External Lightwave Source Input
• Option 210 1550 nm DFB
1
Laser
• Option 220 1300 nm DFB Laser
• Option 300 Adds One Lightwave Receiver
Agilent 83424A Lightwave CW Source
• Option 100 Adds External Lightwave Source Input
Agilent 83425A Lightwave CW Source
• Option 100 Adds External Lightwave Source Input
With accuracy, speed and convenience, the 8703A
performs the optical, electrical, and electro-optical
measurement types listed below. This data can be shown
in magnitude, phase and distance-time measurement
formats. A performance summary is in Table 2. Following
Table 2 is a block diagram and detailed operating
conditions and specifications.
Additional configuration information can be found in the
8703A configuration guide (Agilent literature number
5966-4827E).
1
“DFB” is an abbreviation for Distributed Feedback Laser.
Lightwave source characterization
(electrical-in and optical-out)
Source slope responsivity tests
• Modulation bandwidth
• Modulated output power flatness
• Step response
• Modulation signal group delay and differential phase
• Reflected signal sensitivity
• Distance-time response
Optical reflection tests
• Port return loss
• Distance-time response
Electrical reflection tests
• Port impedance or return loss
• Distance-time response
Lightwave receiver characterization
(optical-in and electrical-out)
Receiver slope responsivity tests
• Modulation bandwidth
• Modulated output power flatness
• Step response
• Modulation signal group delay and differential
phase
• Distance-time response
Optical reflection tests
• Port return loss
• Distance-time response
Electrical reflection tests
• Port impedance or return loss
• Distance-time response
Optical device characterization
(optical-in and optical-out)
Optical transfer function tests
• Insertion loss or gain
• Modulated output power
flatness
• Step response .
• Modulation signal group delay and differential
phase
• Distance-time response
• Modal dispersion
Optical reflection response tests
• Port return loss
• Distance-time response
Microwave device characterization
(electrical-in and electrical-out)
Electrical transfer function tests
• Insertion loss or gain
• Output power flatness
• Step response
• Group delay and deviation from linear phase
• Distance-time response
Electrical reflection response tests
• Port impedance or return loss
• Distance-time response
Table 1. Types of
measurements performed with
the Agilent 8703A
2
Introduction
System dynamic range..(see pages 5, 11, 14)
Transmission test (typical)
Optical-to-optical: 38 to 51 dBo
Optical-to-electrical: 105 to 110 dBe
Electrical-to-optical: 75 to 95 dBe
Electrical-to-electrical: 100 to 110 dBe
Reflection test (typical)
Optical: 31 to 44 dBo
Electrical: 36 to 56 dBe
Distance-time domain........... (see page 13)
Length/location (typical)
Range: 10 ns to 0.5 ms (2 m to 50 km)
Range resolution: 0.5 ps (0.1 mm)
Response resolution: 24 to 48.5 ps (5 to 10 mm)
Stimulus types
Low pass step: 50 ps minimum rise time
Low pass impulse: 48.5 ps minimum pulse width
Bandpass impulse: 97 ps minimum pulse width
Group delay
measurements............................. (see page 15)
Minimum aperture: 1 Hz
Maximum 1 Hz aperture delay: 500 ms
Lightwave source....................... (see page 6)
Wavelength: 1308 or 1550 nm, ±10 nm
Spectral width: 3 nm RMS (FP) or 50 MHz (DFB)
(typical)
Average optical output power: 70 to 600 µW
Modulation bandwidth: 130 MHz to 20 GHz
Modulation frequency resolution: 1 Hz
Modulated optical output power (p-p): 90 to
130 µW (typical)
Modulation index: 25% (typical)
Optical return loss: 15 dBo (typical)
Lightwave receiver................... (see page 7)
Wavelength: 1298 to 1560 nm
Input modulation bandwidth: 130 MHz to 20 GHz
Maximum average input power operating level:
5 mW
System sensitivity (typical): 20 nW
Input port return loss (typical): 20 dBo
Microwave source.................... (see page 11)
Frequency bandwidth: 130 MHz to 20 GHz
Frequency resolution: 1 Hz
Output power range: +5 to –70 dBm
Harmonics: <–15 dBc (typical)
Microwave receiver................ (see page 11)
Frequency bandwidth: 130 MHz to 20 GHz
Maximum input power operating level: 0 dBm
System sensitivity: –110 dBm
Connector types
Lightwave:
HMS-10
FC/PC
DIN 47256
ST
Biconic
SC
Microwave: 3.5 mm (male)
Data accuracy
enhancement................................ (see page 15)
Calibration types:
Response calibration
Response and match calibration
Response and isolation calibration
1-port calibration
Full 2-port calibration
Reference plane extensions
Data averaging:
IF bandwidth control
Sweep-to-sweep averaging
2
Final performance depends upon the 8703A configuration.
For example, performance will vary according to the type of
lightwave source used. Refer inside for further information.
3
Agilent 8703A
Performance overview
Table 2. Agilent 8703A
performance overview
2
4
Agilent 8703A
Block diagram
Figure 1. Simplified block
diagrams for lightwave and
microwave test sets and
information processor
MICROWAVE TEST SET
INFORMATION
PROCESSOR
0.13–20 GHz
RF Source
Attenuator
LIGHTWAVE TEST SET
DAC
Step
External
Detector
ALC
MOD
Phase
Lock
Laser
1300 or
1550 nm
S
Sampler Drive
Bias
Tee
RF Port 1 RF Port 2
Bias
Tee
SS
Samplers
RF
Input
RF
Output
MOD ALC
DC
Block
Optical
Switch
(Opt. 100
Only)
Optical
Modulator
Optical
Output
Isolator
Polarization
Controller
(Peak)
External
Laser
Input
(Opt. 100 Only)
DAC
Bias
Tee
Lightwave
Directional Coupler
Input Coupled Test
Port
Photodiode
Receivers
Auxiliary
Optical
Input
(Opt. 300 Only)
Optical
Input
Specifications describe the instrument’s warranted performance for the
temperature range of 23 ±3°C after a three hour warm-up. Supplemental
characteristics describe useful, non-warranted performance parameters.
These are denoted as “typical” or “nominal”.
Measurement examples
The following graphs show device (DUT) measurements
compared to typical (– – –) 8703A measurement ranges
9
.
Table 3. System
dynamic range (typical)
3
Frequency range (GHz)
0.13 to 12.0 12.0 to 20
Lightwave transfer function test
Optical-to-optical
4
43 dBo
5
38 dBo
Optical-to-electrical
4
105 dBe
6
105 dBe
Electrical-to-optical 85 dBe
7
75 dBe
Lightwave reflection test
Optical
4
36 dBo
5
31 dBo
Optical-to-optical
transmission test
(DUT = 10, 20, 30, 40 and
50 dB attenuators)
Electrical-to-optical
transfer function test
(DUT = laser source)
Optical-to-electrical
transfer function test
(DUT = photodiode
receiver)
5
For optical-to-optical devices, (dBo) = 10 log (#2 optical power
(W p-p) / #1 optical power (W p-p))
6
For optical-to-electrical devices, slope responsivity (dBe) = 20 log
((∆ current (A p-p) / ∆ optical power (W p-p)) / 1 A/W)
7
For electrical-to-optical devices, slope responsivity (dBe) = 20 log
((∆ optical power (W p-p) / ∆ current (A p-p)) / 1 W/A)
8
Measurement range can be shifted upward by externally adding
attenuation in the signal path during calibration and measurement.
3
Limited by maximum lightwave source output power, maximum
lightwave receiver input power, maximum microwave output power
and system noise floor. Specified for an IF bandwidth of 10 Hz and an
averaging factor of 16 after an appropriate calibration has been
performed (i.e. response & isolation calibration for optical tests,
response & match and isolation calibration for electrical-to-optical
and optical-to-electrical tests).
4
8703A Option 100 systems will typically see 1 dBo less dynamic range
than is shown for optical transfer function and reflection measurements.
Optical-to-electrical transfer function measurements will typically
see 2 dBe less.
5
Frequency domain
lightwave dynamic range
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