Definition Of Terms - Keysight Technologies 81490A User Manual

Specifications

Definition of Terms

24
This section defines terms that are used both in this chapter
and "Performance Tests" on page
Specification (guaranteed): describes a guaranteed product
performance that is valid under the specified conditions.
Specifications are based on a coverage factor
otherwise stated), corresponding to a level of confidence of
>95%.
Typical values (characteristics): a characteristic describing
the product performance that is usually met but not
guaranteed.
Generally, all specifications are valid at the stated operating
and measurement conditions for temperature, temperature
stability and settings, with uninterrupted line voltage.
Attenuation range (nominal) [optical out]
The range of attenuation factors selectable on the reference
transmitter. Attenuation is the ratio between optical output
power (in Watt) with attenuation factor set to 0 dB and the
attenuated optical output power, expressed in dB.
Attenuation [dB]
Conditions: As specified.
Average optical output power
The average output power from a fiber connected to the
reference transmitter optical output.
Conditions: Using a fiber with high quality connectors in
perfect condition. Other conditions as specified.
1 "Guide to the Expression of Uncertainty in Measurement" ("GUM"), BIPM, IEC, ISO et al. (1993)
Keysight 81490A Reference Transmitter Module User's Guide, Edition 3.0
Definition of Terms
35.
1
of 2 (unless
P [W]
att
 
= 10 log
-------------------------
P [W]
0dB