HP 86037B, Instruction Manual

Page: 70 / 204

3-14
Normalization
Setting Normalization Preferences
Modulation Frequency
RF frequencies used to modulate the optical signal in the test and reference
measurement operations.
TLS Target Power
The level requested of the tunable laser source. If it cannot supply the full
amount, it will supply as much as it can.
Average Factor
Controls the number of network analyzer sweeps which are averaged to mea-
sure group delay at each wavelength point. The measurement time is propor-
tional to the average factor. Noise reduction is proportional to the square root
of the average factor. Select the
Sensitivity
:
Normal
,
High
, or
Highest
.
Sensitivity
Determines the IF bandwidth used by the network analyzer. The settings Nor-
mal, High and Highest correspond to 300, 100 and 30 Hz, respectively. This
setting affects the length of time required to complete a measurement. The
higher the sensitivity, the longer the measurement time. Noise is reduced at
higher sensitivity.
Verify cal limit
The group delay limit for the normalization verification. This is the limit
against which the system compares the data obtained when a normalization
verification is performed.
TLS Target Power
The level requested of the tunable laser source. If it cannot supply the full
amount, it will supply as much as it can.
Average Factor
Controls the number of network analyzer sweeps which are averaged to mea-
sure group delay at each wavelength point. Noise is reduced by one over the
square root of the averaging factor, but measurement time increases in pro-
portion to averaging factor.
Max Cal Device Length
The maximum length for the “thru” cable. The smaller this length, the faster
the length normalization. However, the time savings typically is only about 1
second. Since setting this value lower than the actual “thru” length results in
an incorrect length normalization, this value should be set well above the max-