Agilent Technologies 86100B User Manual download pdf (Page 13)

86109B 40Gb/s Optical Receiver Module Specifications

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86109B Typical Frequency Response

Frequency (Hz)

000.0E+0 10.0E+9 20.0E+9 30.0E+9 40.0E+9 50.0E+9 60.0E+9

Intensity (dB)

Historically, the 3 dB channel bandwidth has been

the primary specification used to describe the ability

of an oscilloscope to accurately display a high-speed

waveform. As today’s communication signals often

have significant frequency content well beyond an

oscilloscopes 3 dB bandwidth, it now becomes impor-

tant to consider the oscilloscope response beyond

the nominal 3 dB rolloff. If the response rolls off too

fast or has an erratic phase response, the displayed

waveform may exhibit significant distortion even if

the 3 dB bandwidth is extremely high. Smooth phase

response is the key to good pulse fidelity.

Rather than building the Agilent 86109B to have the

highest 3 dB bandwidth, the frequency response has

instead been carefully designed to achieve both a very

fast channel with a FWHM (full-width-half-maximum)

impulse response of approximately 12 ps with pulse

aberrations typically less than 10%. Increasing the

bandwidth beyond 40 GHz for an improved specification

is possible, but within this system, the FWHM speed

performance does not improve while the pulse aber-

rations degrade significantly.

OPTICAL CHANNEL SPECIFICATIONS

Optical Channel Frequency Response

(Characteristic)

Best Signal Integrity Mode 30 GHz (–2.5 dB)

40 GHz (–3.5 dB)

50 GHz (–4.5 dB)

Best Noise Performance Mode 26 GHz (–3.0dB)

Impulse Risetime 8.5 ps

(10%to 90% level measured from impulse response

)

Impulse Pulse Width 12.0 ps

(FWHM measured from impulse response

)

Pulse Aberrations (pk-pk distortion) <10 % pk-pk

Polarization Dependence <0.5 dB

Wavelength Range 1000 to 1600 nm

Calibrated Wavelengths 1310 nm and 1550 nm

Optical Conversion

1550 nm 10 V/W

1310 nm 12 V/W

RMS Noise

Characteristic 50 µW (best pulse integrity mode)

15 µW (best noise performance mode)

Maximum 70 µW (best pulse integrity mode)

30 µW (best noise performance mode)

Scale Factor

Minimum 20 µW/division

Maximum 1.0 mW/division

dc Accuracy ±50 µW ±4% of (reading- channel offset)

(single marker, referenced to average power monitor, ≤500 µW/division)

dc Difference ±4% of delta

(two markers, referenced to average power monitor, ≤500 µW/division)

dc Offset –2 mW to +6 mW

(referenced two divisions from screen bottom)

Average Power Monitor

(specified over operating wavelength range) –23 dBm to + 9 dBm

(5 µW to 8 mW)

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Agilent Technologies 86100B User Manual Page 13

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