Electrical Output; Correcting For Conversion Gain - Tektronix P6701B Mode D'emploi

Operating Basics

Electrical Output

The P6701B and P6703B O/E converters output approximately
1 V/mW across 50
for the P6701B converter and 1310 nm for the P6703B converter).
The P6723 O/E converter provides a nominal NRZ (non return to
zero) signal ( 1 V
P6723 converter provides a constant peak-to-peak amplitude
electrical output for long wavelength optical signals (1310/1550 nm)
ranging from –8 dBm to –28 dBm average optical power.

Correcting for Conversion Gain

You can compensate your measurement for wavelengths that have a
conversion gain other than one. For example, if you are using a
P6703B to measure a signal with a wavelength of 1550 nm, the
conversion gain at that wavelength is typically 1.1 V/mW versus
1.0 V/mW at 1310 nm (see Figure 7 on page 23). To correct the
measurement to 1 V/mW, multiply the measurement by 0.909 (the
reciprocal of 1.1).
If your measurement instrument is so equipped, you can automatical-
ly multiply displayed waveforms or measurements by the appropriate
correction factor. Refer to your instrument manual for details.
16
at the nominal calibrated wavelength (780 nm
) that is AC-coupled to the 50
p-p
P6701B, P6703B & P6723 Instructions
output. The