Specifications
1-24
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
Table 1- 8: O/E converter (CSA7000B Series only) (Cont.)
Characteristic
1
Description
Optical return loss, typical With 50 m or 62.5 m core multimode fiber (CPC6):
>14 dB for 780 nm ±20 nm
>14 dB for 850 nm ±20 nm
With 9 m core singlemode fiber (SMF-28):
>28 dB for 1310 nm ±20 nm
>28 dB for 1550 nm ±20 nm
The return l oss includes optical reflection contribut ions from the device under
test’s SC-SPC connector interface with the user’s PC style connector as well as
all other optical reflections from t hat interface up to and including the device
under test’s final photo diode termination.
Peak-to-peak aberrations in
response t o falling edge, typical
11% peak-to-peak total aberration (system including O/E-to-CH1 input adapter,
and instrument)
Maximum falling edge 10% to 2% settling time
(ORR di sabled), typical
The step response to a fast optical square OFF edge reaches toc within 2% of
the final 0% level within 2 ns after the 10% transition point.
Smallest average power for mask test (sensitivity),
typical
1310 nm and 1550 nm:
40 W peak-to-peak. 20 W (--17 dBm) average power assuming 50% average
duty cycle
780 nm and 850 nm:
80 W peak-to-peak. 40 W (--14 dBm) average power assuming 50% average
duty cycle
Assumes the scale factor is set to minimum W/div settings and signal is at
least 2 divisions peak-to-peak
Optical scale factor range 10 W per division to 500 W per division
Optical reference receiver typical ly available from the following scale factors:
1310 nm and 1550 nm:
13.5 W per division to 66 W per division
850 nm:
25 W per division to 125 W per division
780 nm:
28 W per division to 142 W per division
1
All specifications are with the O/E electrical out-to-CH1 input adapter installed.
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