11

(O/E mode)

Specifications for optical to electrical measurements at 1550 nm

N4373C system with network analyzer

E8361C/A -014

Specifications are valid under the stated measurement conditions.

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-

DUT response

±0.7 dBe typ.

±0.8 dBe

±0.9 dBe

±1.2 dBe

±1.9 dBe

≥ -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

Absolute

frequency response

DUT response

±1.9 dBe

±1.9 dBe

±2.0 dBe

±2.8 dBe

Frequency re-

sponse repeatabil-

DUT response

±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

Minimum measurable frequency

-60 dB(A/W)

-60 dB(A/W)

-60 dB(A/W)

-60 dB(A/W)

-55 dB(A/W)

Phase uncertainty

DUT response

±3.5°

±3.0°

±2.4°

±3.2°

±5.0°

≥-25 dB(A/W)

±5.5°

±3.5°

±2.4°

±5.0°

±7.0°

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. -10 dB(A/W).

[f2]

For +5 dBm average output power from LCA optical output..

[f3]

IFBW = 10 Hz.

[f4]

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).

[f5]

After CW responsivity and user calibration with external source.

[f6]

Requires option -101 or -102.

[f7]

Typical with internal source.

[f8]

Average value over frequency range.