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.
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
Agilent N4373C Specifications
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 Elec-
tronic 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 calibra-
tion 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.
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