Tektronix CSA8000 Series, Service Manual

Page: 54 / 354

80C00 Modules Specifications
CSA8000 & TDS8000 Instruments and Sampling Modules
1–31
Table 1–18: Optical modules – Acquisition (Cont.)
Name Characteristics
n
FC1063
(1.0625 Gb/s)
Reference Receiver
setting frequency
response
6
Scalar frequency response falls within Industry Standard, Bessel-
Thompson reference receiver boundary limits.
Fiber Channel frequency response boundary limits are described in
ANSI FC-PC. For convenience, the scalar frequency response of the
output amplitude (for sinusoidal swept optical input) has been
interpreted from the Bessel-Thompson transfer function and listed
below:
(MHz) (dB)
Frequency Lower Nominal Upper
0.000 –0.50 0.00 0.50
159.5 –0.61 –0.11 0.39
318.9 –0.95 –0.45 0.05
478.4 –1.52 –1.02 –0.52
637.9 –2.36 –1.86 –1.36
797.4 –3.50 –3.00 –2.50
956.8 –5.67 –4.51 –3.35
1063 –7.25 –5.71 –4.17
1116 –8.08 –6.37 –4.66
1275 –10.74 –8.54 –6.35
1435 –13.55 –10.93 –8.31
1595 –16.41 –13.41 –10.41
2126 –26.11 –21.45 –16.78
1
Single-mode fiber (Corning SMF-28 specs).
2
The optical input powers below nondestructive levels may exceed saturation and
compression limits of the module.
3
The optical wavelengths that the product accepts optical inputs and still provides a
reasonable (25% of peak optimum) wavelength conversion gain.
4
Vertical accuracy specifications are referenced to the internal optical power meter
reading for a given optical input, and are limited to a temperature range within
"
5
_
C of previous channel compensation and an ambient temperature within 20
_
C
to 35
_
C.
5
Optical bandwidth is the frequency at which the responsivity of the optical to
electrical conversion process is reduced by 50% (6 dB).
6
This specification is limited to the instrument operating in an ambient temperature
b20
_
C and +30
_
C. Nominal freq response is specified for optical input
signals of modulation magnitude such that 2 mW
pp
(200 uW
pp
for 80C03) or less
signal is applied at the sampler input. for 80C05 at 40 GHz.
7
The optical channel noise with no optical noise input (Dark Level).
8
Clock recovery versions reduce the power reaching the vertical channel (splitter to
clock recovery produces loss). Therefore, the non-clock recovery modules more
closely exhibit the typical noise performance.