Atec Anritsu-S332D-31D - Manual (Page 5)

5
OSL Calibration
Open-Short-Load (OSL) calibration is standard for the S331D and S332D. All errors from source match, directivity and
frequency response are mathematically removed allowing for accurate vector corrected Return Loss, Cable Loss, VSWR,
and DTF measurements. Directivity is usually the main contributor to measurement uncertainty, and corrected directivity
of 42 dB or better is common using Anritsu’s precision components.
FlexCal ™
The Site Master FlexCal TM broadband calibration feature is an OSL-based calibration method. It offers field technicians a
simple and convenient way to troubleshoot and identify faulty antenna system components, because it eliminates the need
for multiple instrument calibrations and calibration setups. Field technicians can now perform a broadband calibration
from 25 MHz to 4 GHz and change the frequency range after calibration without having to recalibrate the instrument. A
zoom-in/zoom-out capability is available in Return Loss, Cable Loss or VSWR mode. Because the resolution and maximum
distance are dependent on the frequency range, field technicians can even change the frequency range in DTF mode to
produce the desired fault resolution and horizontal range needed for the measurement, without performing additional
calibrations.
InstaCal™ Calibration
The InstaCal Calibration module is available for the S331D and S332D and users can cut the time
required to calibrate the Site Master by as much as 50 percent. With InstaCal, users are
only required to connect the InstaCal calibration module once and the
calibration process will be done automatically. Directivity specification for the
InstaCal module is 38 dB for the entire frequency range allowing the user to
make fast and accurate measurements.
RF Immunity
In today’s wireless environment it is very common that there will be other RF activity present when making a measurement.
In order to make accurate measurements in hostile RF environments, the receiver has to be able to reject the unwanted
signals. Special dithering techniques are applied to the Site Master when making a measurement, and the Site Master can
reject signals up to +17 dBm ensuring accurate measurements in RF rich environments.