HP 83447A, User'S And Service Manual

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Servicing the HP 83447A
P erformance T ests
3. Set the test equipment to the settings shown in T able 4-4.
T able 4-4. Laser T ransmitter Setup
P attern Generator 2
23
0 1 pattern
1.00 Vpp data amplitude
0.000V data high level (0V term.)
normal polarity , clock trigger
trigger mode clock/32
23 zeroes trigger pattern
Clock Source 2.48832 GHz frequency
ON
Laser T ransmitter
(both 1310 and 1550 nm)
connect the 1310 nm unit rst, then the 1550 nm unit
analog mode
bias cal mode
clean the optical connectors, FC/PC adapter
1.00 Vpp drive
Optical Attenuator clean the optical connectors
calibrate to read actual power
fully charged or on an ac adapter
Set power to 0 10 dBm
FC/PC adapters
Optical P ower Meter 1310 nm wavelength
clean the connector
FC/PC adapter
Digital Communication Analyzer electrical channel OFF
optical channel ON
Time base units: Bit P eriod
Bit rate: STM16/OC48
Scale: 2 bits
250 W/div
0 400 mV trigger level
displa y persistence = 1 sec , zero mV oset
4. With the laser turned o, perform the analyzer vertical calibration (Dark
Cal).
5. Turn on the laser and observe the eye pattern on the digital
communications analyzer .
6. On the Measure Eye menu, select the Measure Extinction Ratio function.
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