Keysight Technologies N4374B, Руководство пользователя

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Specifications
Keysight
N4374B Lightwave Component Analyzer, User’s Guide 137
Specifications for electrical to optical measurements at 1550 nm
(EO mode)
N4374B system with E5071C -245 network analyzer
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 10 MHz to 50 MHz 50 MHz to 0.7 GHz 0.7 GHz to 4.5 GHz
Relative
frequency
response
uncertainty DUT response
¥ -18 dB(W/A)
a
±0.5 dBe typ. ±0.7 dBe
(±0.5 dBe typ.)
±0.8 dBe
(±0.6 dBe typ.)
¥ -38 dB(W/A) ±0.5 dBe typ. ±0.5 dBe typ. ±0.6 dBe typ.
Absolute
frequency
response
uncertainty DUT response
¥ -18 dB(W/A)
a
±1.3 dBe typ. ±2.2 dBe
(±1.3 dBe typ.)
±2.2 dBe
(±1.3 dBe typ.)
Frequency
response
repeatability
(typ.) DUT response
¥ -38 dB(W/A)
a
±0.02 dBe ±0.02 dBe ±0.02 dBe
Minimum measurable frequency
Response (noise floor)
b c
-100 dB (W/A) typ. -103 dB (W/A) -103 dB (W/A)
Phase
uncertainty
(typ.)
d
DUT response
¥ -38 dB(W/A)
a
- ±1.0° ±1.0°
Group delay uncertainty Derived from phase uncertainty, see section “Group delay uncertainty ” on page 143.
Example: ±1.0°
±8 ps (0.5 GHz aperture)
a
For DUT optical peak output power ¤ +7 dBm.
b
IFBW = 100 Hz.
c
Average value over frequency range
d
Except phase wrap aliasing (example: a DUT group delay of 5 ns (1 m cable length) requires a wavelength 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
Dj = 360°
×
D GD
×
f
mod
.(in deg).