3.5 Performing Synchronized Measurement with Multiple Instruments
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Synchronized operations
When drawing external synchronization from two or more instruments, be sure to set only one
as the oUt power meter. Use of two or more oUt instruments may cause damage or malfunc-
tion.
• When an instrument is set to oUt, the synchronization signal is output from the external synchronization
terminal (EXT.SYNC) according to the internal processing timing (200 ms).
• When an instrument is set to in, it will wait for the synchronization signal from the power meter set to oUt.
If no synchronization signal is received before 210 ms or more elapses, the instrument will display [Err.20].
See: "6.2 Error Indication" (p.166)
Internal calculations
The slave matches the master's timing (when the number of averaging iterations is 1 [the
default setting]).
Display updates
Data updates
Integration start/stop and reset
Integration starts, stops, and is reset at the same timing as the master on the slave by
means of operation on the master.
Display hold
When is pressed on the master, the master and slave both enter the hold state. To
cancel the display hold state, press again.
Zero Adjustment
Zero-adjustment is performed on the slave in synchronization with zero-adjustment on the
master.
Key-lock
When the key lock is activated on the master, it is also activated on the slave. When the key
lock is canceled on the master, it is also canceled on the slave.
• Before starting integration synchronized measurement, reset integrated values on both the master and
slave. To perform a reset that is synchronized to the master, it is necessary for integration operation on the
slave to be in the stopped or reset state.
• Starting integration without first performing a reset results in additional integration.
• If the number of averaging iterations settings on the master and slave differ from the default setting, dis-
play updates will not be synchronized.
• Synchronization and external control-based integration cannot be mixed on the slave. Always terminate
external control and reset integration when performing synchronization-based integration.
• When the slave’s integration time setting is shorter than the master’s integration time setting, stop timing
cannot be synchronized since the slave’s integration will stop first.
• When performing synchronized measurement, once integration start/stop, display hold, zero-adjustment,
or key lock operation is performed on the slave, it may not be possible to synchronize operation, even if
the same operation is performed on the master.
• When performing integrated measurement using synchronized control, a difference of up to 0.7 sec. per
hour may occur between the master’s integration elapsed time display value (TIME) and the slave’s inte-
gration elapsed time display value.
• Canceling the hold state on the master will cause all hold states (display, maximum value, and minimum
value) to be canceled on the slave.
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