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PPM Sentinel II & Sentry II Fiber Optic Link
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PPM's
Test & Measurement Fiber-Optic-Link (FOL) Systems
allow the user to transmit an electrical signal out of
an area of high electromagnetic field strength to monitoring
test equipment over optical fiber. For example, the output
from a field sensor in an EMC test chamber may be transmitted
to a spectrum analyzer or oscilloscope in a low field
environment.
A FOL system consists of a shielded Transmitter with remotely
programmable input range connected to a Receiver/Controller
via a fiber optic cable and a Folnet Controller. An electrical
signal applied to the input connector on the Transmitter
is converted into an optical signal for transmission over
the optical fiber to the Receiver, where it is it converted
back into an electrical signal. The Transmitter is electromagnetically
shielded for operation without breakthrough in very high
field levels.
The Folnet Controller provides full remote control of
the Transmitter gain, input selection, input impedance,
Transmitter on/off and other functions. This enables the
user to set up the link optimally for any measurement
conditions. The user may control these functions via the
front panel of the Folnet Controller, or by computer.
Sentinel II
The Sentinel II Fiber-Optic-Link offers a signal bandwidth
of 2kHz to 1GHz. The 50ohm input and output means that
they can be coupled to commonly used sensors and measurement
systems. A range of built-in attenuators and a low noise
pre-amplifier allow the user to vary the gain of the system
from a nominal +21dB down to -24dB (for monitoring high
level signals as high as 24dBm/10Vp-p), and up to +33dB
(for detecting signals as low as -136dBm in a 1kHz measurement
bandwidth ). The Transmitter contains four electrical
inputs which allow up to four sensors to be monitored
in turn, without the need to completely re-configure the
measurement set-up. A calibration square-wave enables
confirmation of system gain accuracy, and a buffer is
provided to switch the input impedance to high impedance.
Sentry II 250
The Sentry II 250 Fiber-Optic-Link offers similar performance
to the Sentinel II, but is optimized for lower frequency
operation (40Hz to 250MHz bandwidth). This makes the unit
ideal for pulse power and lightning work for example.
For additional information please click
here.
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