Tektronix NetTek YBT250, User Manual

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Glossary
YBT250 Field Transmitter & Interference Tester User Manual
Glossary- 3
Measurement Frequency. The Measurement Frequency is the
frequency at which measurements are made. The Measurement
Frequency is always shown in the Frequency box. The
Measurement Frequency is indicated in the spectrum displays by
the frequency marker.
Measured Frequency. The actual frequency measured for the selected
channel.
Multipath Power. Multipath Power (MP) is the ratio of the pilot power
of the strongest multipath path component of the selected signal
to the total pilot power of all multipath components of that
signal. MP measures the interference that is due to multiple
versions (reflections) of the desired signal arriving at the
antenna at different times.
Noise Floor. Noise Floor measures the interference coming into the
receiver antenna. The Noise Floor is an integrated power
measurement for the selected standard. Larger numbers indicate
more noise.
Occupied Bandwidth. The Occupied Bandwidth is the frequency
range where 99% of the power transmitted in a single channel
lies. If there is a signal in either channel adjacent to the selected
channel, the signal will add power to the measurement, thus
resulting in an inaccurate measurement.
Peak-to-Average Power. The Peak-to-Average Power measurement is
the ratio of the peak envelope power in the transmitted signal to
the average power in the transmitted signal. The ratio is
expressed in dB.
Pilot Dominance. The Pilot Dominance (PD) is the ratio of the
selected pilot power signal to the sum of the next two highest
detected pilot power levels. A more positive PD value is good,
indicating that the selected pilot is the dominant pilot in the
received signal; this means that the other received pilot signals
have less impact on measurement results. A value above 15 dB
is desirable, although measurements can be made below this
level. PD values below 10 dB indicate that the signal quality is
not adequate for accurate OTA measurements.