Teledyne LeCroy OE695G - Manual (Page 17)

Instruction Manual
922562-00 Rev A 11
5. Configure the following settings:
a. Recall Default setup
b. Enable the channel with the OE695G, disable others
c. Configure the active channel for 1550 nm optical wavelength, 50
uW/div, Sin x/x interpolation
d. Configure the trigger for Aux In, Normal, and adjust the trigger
level for proper trigger
e. Locate the optical pulse (reduce attenuation if necessary) and
adjust oscilloscope time settings to center the pulse on screen
with 1 ns/div.
6. Adjust the optical attenuator for peak pulse amplitude 60 uW.
7. Set channel pre-processing averaging to 10,000.
8. Create a dual Math Trace:
a. Rescale(FFT(<targetchannel>))
b. FFT parameters: Output Type = Power Spectrum, Window =
Rectangular, else defaults
c. ReScale parameters: First Multiply by= 2.0, else defaults
d. Zoom: Horizontal Center= 10 GHz, Scale/div= 2 GHz, Vertical
Scale = 10 dB/div, Center = adjust as necessary to display trace
on screen.
NOTE: The scale factor makes the vertical units dBe (electrical) instead of dBo
(optical power). Optical reference receiver specifications are in terms of dBe.
9. With the OE695G optical input cover closed, perform a dark calibration
(page 6).
10. Connect the attenuator output cable to OE695G optical input.
11. Configure the channel optical receiver for the desired response (e.g.,
Custom - 10 Gb/s (Fr = 7.5 GHz)).
12. Press Clear Sweeps on the oscilloscope front panel.
13. Observe frequency response and compare it to the ideal BT-4 response
in the table below, confirm it is within limits.