EXFO IQS-1600 High-Speed Power Meter for IQS-500/600 - Manual (Page 91)

Using the External Trigger and Analog Outputs
High Speed Power Meter 83
Analog Output (IQS-1610, IQS-1620)
Connecting a TTL Source to the External Trigger
A synchronizing signal from a signal generator or from a control circuit may
be connected to the external trigger input of the your high-speed power
meter module if it does not exceed TTL levels. The illustration below
shows a typical connection setup for a signal generator.
Analog Output (IQS-1610, IQS-1620)
The analog output provides an electrical signal proportional to the optical
power input on the detector (which is the measured value shown in the
display of the Instrument function tab). It is available for channel 1 of both
single- and dual-channel models.
The analog output signal is the redirection of the signal after the first
amplification stage. Do not use the analog output in Autorange mode (see
Setting the Measurement Range on page 32) because the gain scales of the
first amplification stage are constantly changed to optimize
signal-to-noise ratio.
4.000 000 000n GHz
6.00 dBm
2-Ch Power Meter
IQS-1600
EXT. TRIG
ANALOG OUT
C1
C2
Signal generator IQS-1600 Optical power input
Optical input Optical output
External trigger input
DUT
(e.-o. component)