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IM AQ6376-01EN
Analysis
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App
Index
Logging Parameters
• LOGGING ITEM
Selects the logging item.
• WDM
Records the WL (channel center wavelength), LEVEL (channel level (peak level –
noise level)), SNR (channel signal-to-noise ratio) of WDM analysis.
If the horizontal scale unit is set to wavenumber, you cannot select WDM.
• MULTI-PEAK, PEAK
Records the WL (peak center wavelength) and LEVEL (peak level).
• DFB-LD
Records all DFB-LD analysis items listed in appendix 3.
• LOGGING MODE
If you want to log many channels, use MODE1.
If you want to log many values, use MODE2.
The AQ6376 automatically detects the number of channels.
MODE1: Up to 1024 channels can be logged. The maximum number log entries is
2001.
MODE2: The maximum number log entries is 10001. Up to 256 channels can be
logged.
• MINIMUM INTERVAL
Sets the logging interval (the time duration from the start of a measurement to the
start of the next measurement). Set the logging interval in seconds.
Setting range: SWEEP TIME, 1 s, 2 s, 5 s, 10 s, 30 s, 1 min, 2 min, 5 min, 10 min
In a single measurement, if the sweep time is longer than the measurement interval
due to the sweep conditions, the logging interval is set to SWEEP TIME. If this
happens, a warning appears. (WARNING 153:Sweep time exceeds the set interval) If
this message appears, check the logging interval.
• TEST DURATION
Sets the total logging duration of one test.
The setting range depends on the LOGGING MODE setting (maximum logging count)
and logging interval. The minimum logging duration is the logging interval. The logging
interval for SWEEP TIME is 1 seconds.
Note
If the auto offset function is on, auto offset is executed at regular intervals even during logging.
When auto offset is progress, logging measurement is paused. When an auto offset is
performed at a time when logging measurement would normally occur, a warning appears.
(Warning 152 Logging was skipped for Auto zeroing)
If this message appears, check the auto offset function setting or logging interval setting as
necessary.
• ESTIMATED TOTAL COUNT
Displays the estimated measurement count during logging.
• PEAK THRESH TYPE
Sets how the threshold for detecting the data logging mode (peak or bottom) is
specified. Modes whose level is greater than equal to the threshold specified here are
logged.
ABS: Specifies the threshold using an absolute value (peak level)
REL: Specifies the threshold using a relative value (difference from the highest peak
level)
6.15 Analysis Data Logging