Introduction
The TIA-527 Balanced Optical to Electrical Converter is a convenient battery-operated detector/ampli-
fi
er combination that mounts directly on the input of an oscilloscope, digitizer, or other readout device.
With a band width of DC to 125 MHz, it accurately provides an electrical replica of the difference of
two optical signals presented to its two matched InGaAs detectors. It is fully capable of driving a 50
ohm cable terminated in its characteristic load.
The TIA-527 has selectable transimpedances of 1.4 K
Ω
and 14 K
Ω
plus a post ampli
fi
er with select-
able gains of 1 or 10. Thus the overall responsivity ranges from approximately 1, 000 V/W to 100,
000 V/W at the peak of the detector response curve. Interstage coupling may be switched from DC
to AC to avoid saturation of the second stage in those cases where the signal of interest is combined
with a relatively large DC optical component
Each unit is powered by a self-contained 9 V lithium battery or a universal wall mount power supply.
Battery operation eliminates ground loops and the undesirable effects of conducted radiation that may
be present on local power lines.
Calibration - This is a qualitative measurement device. No calibration is required or necessary.
1
Unpacking and Inspection
Prior to shipment this instrument was inspected and found to be free of mechanical and electrical
defects. Upon acceptance by the carrier he assumes responsibility for its safe arrival. After unpack-
ing, examine the unit for any evidence of shipping damage. Should you receive this instrument in a
damaged condition, apparent or concealed, it must be noted on the freight bill or express receipt and
signed by the carrier’s agent. Failure to do so could result in the carrier refusing to honor the claim.
Upon
fi
ling a claim TTI should be noti
fi
ed.
