Optical Sampling Modules
CSA8000 & TDS8000 Instruments and Sampling Modules
4–103
Clock Recovery Optical Sensitivity Range and Recovered Clock Timing Jitter
This procedure checks the clock recovery optical sensitivity range for an 80C03
Optical Sampling Module and the recovered clock timing jitter on the 80C01 and
80C03 Optical Sampling Modules.
NOTE
. The clock recovery optical sensitivity range and recovered clock timing
jitter for the 80C02 and the 80C04 Optical Sampling modules currently cannot
be checked by the user. If you want these parameters checked, you must return
the optical sampling module to Tektronix, Inc. for verification.
Equipment
required
Tektronix CSA8000/TDS8000
Tektronix 80E02 Sampling Module (item 23)
Tektronix OA5002 variable optical attenuator (item 24)
Advantest D3186 12 Gb Pattern Generator (item 27)
JDS Uniphase 420B Laser Transmitter (item 26)
Single-mode fiber-optic cable, 2 m, FC to FC connectors (item 30)
Attenuator, 2X (6 dB pad), 50
W
,
SMA (item 22)
Cable, coaxial, 2 ns delay SMA, male connector on each end (item 29)
Prerequisites
See page 4–19
Before performing this procedure, be sure you have completed the Dark level &
Vertical Equivalent Optical Noise
procedure on page 4–83.
Install the test hookup (see Figure 4–29) and preset the CSA8000/TDS8000
controls:
1. Install the 80C0X Optical Sampling Module into Channel 1 of the TDS8000
or CSA8000 instrument.
2. Install the 80E02 Sampling Module into Channels 3 and 4 of the TDS8000
or CSA8000 instrument. (Channel 1 and Channel 2 are disabled when an
optical sampling module is installed in the upper Channel 1.)
3. Install 2X SMA electrical attenuators on the inputs of the 80E02 Sampling
Module (to prevent saturation).
4. Connect a less than 2 ns delay, 50
W
coaxial cable between the 1/32 CLK
signal output of the pattern generator and the TRIGGER DIRECT connector
on the TDS8000 or CSA8000.
5. Connect a less than 2 ns delay, 50
W
coaxial cable between the DATA output
of the pattern generator and the DIGITAL IN DC-COUPLED input on the
laser transmitter.
6. Connect a single-mode fiber-optic cable between the OPTICAL output of the
laser transmitter and the OPTICAL INPUT on the variable optical attenuator.
Setup
Содержание CSA8000 Series
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