Specifications
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
1-23
Table 1- 8: O/E converter (CSA7000B Series only)
Characteristic
1
Description
Optical input connect or Rifocs universal connector
O/E wavelength range 700 nm to 1650 nm
nO/E gain ≥0.27 V/mW (0.35 V/mW typical) at 780 nm ±20 nm
≥0.33 V/mW (0.40 V/mW typical) at 850 nm ±20 nm
≥0.64 V/mW (0.75 V/mW typical) at 1310 nm ±20 nm
≥0.64 V/mW (0.75 V/mW typical) at 1550 nm ±20 nm
Applies to graded index multimode fiber with core diameter 62.5 m or smaller
at the input and O/E Electrical-to-CH1 Input adapter
Optical Channel DC measurement accuracy, typical ±((2% +(2% ¢ net offset/1 mW)) ¢reading +(Position ¢ W/ div) -- Offset
+0.35% ¢ |Net Offset +3 W +0.18 div ¢ W/div) only between 10 W/div
and 50 W/div inclusive. Average of ≥16 waveforms
The delta between any two averages of ≥16 waveforms acquired under the
same setup and ambient conditions:
±((2% +(2% × net offset/1 mW)) × reading +0.16 div × W/div)
Excludes normal variations due to fiber connection to the front of the instrument
nOptical Channel Bandwidt h (includes O/E,
O/E-to-TekConnect adaptor, and instrument)
5 _Cto25_C:
2.4 GHz
DC conversion gain linearity <4mV/div: ±(4.5% + (6% × net offset))
4 mV/div to 99.5 mV/div: ±(4% + (2% × net offset))
100 mV/div to 1.0 V/div: ±(4% + (2% × net offset/10))
Absolute maximum nondestructive optical input
5 mW average;
10 mW peak at the wavelengt h with the highest relative responsivity
Maximum nonsaturating linear response to transient
input, typical
The transient optical signal response is linear (±6%) for <170 Waverage
input (340 W p) at 850 nm
<120 W average input (240 W p) at 1310 and 1550 nm
Output zero (Dark l evel) ±(1.6 W +0.1 division × W/div) from 10 Wto50W per division vertical
scale setting
nMaximum noise output, rms CSA7404B:
1310 nm and 1550 nm
≤1.1
+
6.5% o
di
settin
.
.
850 nm
≤2.1 W + (6.5% of W/div setting)
780 nm
≤2.6 W + (6.5% of W/div setting)
O/E converter alone
≤0.85 W
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