9

(E/O mode)

Specifications for electro to optical measurements at 1550 nm

N4373C system with network analyzer

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 perfor-

mance

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

Relative frequency

response uncer-

tainty

DUT response

±0.8 dBe

(±0.6 dBe typ)

±0.8 dBe

(±0.6 dBe typ)

±1.0 dBe

(±0.7 dBe typ)

±1.6 dBe

(±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

Absolute frequency

response uncer-

tainty

DUT response

±1.2 dBe typ

±1.8 dBe

(±1.2 dBe typ)

±1.8 dBe

(±1.2 dBe typ)

±1.9 dBe

(±1.2 dBe typ)

±2.7 dBe

(±1.8 dBe typ)

Frequency response

repeatability (typ)

DUT response

±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

Minimum measurable frequency

-64 dB(W/A)

-64 dB(W/A)

-64 dB(W/A)

-64 dB(W/A)

-59 dB(W/A)

Phase uncertainty

DUT response

±3.5°

±3.0°

±2.3°

±3.2°

±4.5°

≥-36 dB(W/A)

±5.5°

±3.5°

±2.3°

±4.2°

±6.5°

Group delay uncertainty

Derived from phase uncertainty, see section

“Group delay uncertainty”.

Example: ±2.0° → ±8 ps (1 GHz aperture)

[f1]

For DUT response max. -13 dB(W/A).

[f2]

IFBW = 10 Hz.

[f3]

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).

[f4]

Average value over frequency range.