Optical Sampling Modules
CSA8000 & TDS8000 Instruments and Sampling Modules
4–91
2. Connect the 10 dB optical attenuator to the output of the optical impulse
generator.
3. Connect a fiber-optic cable between the 10 dB optical attenuator and the
input of the OA5002 variable optical attenuator.
4. Connect a fiber-optic cable between the output of the variable optical
attenuator and the OPTICAL INPUT of the optical sampling module.
5. Connect a 50
W
coaxial cable from the rear trigger (SYN) on the optical
impulse generator to the TRIGGER DIRECT input on the TDS8000 or
CSA8000.
6. Start with about 30 dB of attenuation on the variable attenuator.
NOTE
. To avoid dispersing the narrow optical impulse signal, keep all fiber
lengths as short as possible. Lengths that are 2 to 3 meters long are acceptable.
7. Press the SELECT ON/OFF button on the 80C0X Optical Sampling Module
so that the adjacent indicator lights. This turns on Channel 1 (C1) on the
80C0X-CR Optical Sampling Module.
8. In the Setup menu, select Acquire and make the following changes in the
Acq Setup dialog box:
a. Select Average as the acquisition mode.
b. Set the number of samples to 64 Samples
9. In the Trig Setup dialog box, do the following:
a. Select External Direct for the trigger source.
b. Select Auto for Mode.
c.
Select the rising edge for Slope.
d. Click the Set to 50% button to set the trigger point midway on the rising
signal.
10. In the Horiz Setup dialog box, do the following;
a. Set the Scale to 1.000 ns/div. (This setting will make it easier to initially
locate the optical pulse later in the procedure.)
b. Set the Position to 18.000 ns. (This setting will make it easier to locate
the first optical pulse later in the procedure.)
c.
Set the Record Length to 2000.
Содержание CSA8000 Series
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Страница 22: ...Preface xviii CSA8000 TDS8000 Instruments and Sampling Modules ...
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Страница 59: ...80C00 Modules Specifications 1 36 CSA8000 TDS8000 Instruments and Sampling Modules back ...
Страница 63: ...80A01 Module Specifications 1 40 CSA8000 TDS8000 Instruments and Sampling Modules ...
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Страница 291: ...Removal and Installation Procedures 6 66 CSA8000 TDS8000 Instruments and Sampling Modules ...
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