Anrtisu Cell Master MT8212B, Руководство пользователя, Страница: 254 / 294

q
See Mask
— Creates a mask for the Power vs. Time graph. The mask will be
green if the sampled signal is within the mask, and red if it is outside the
mask.
q
Mask On/Off
— Turns the mask funcion on or off.
The following display sections are available through the MEAS/DISP key:
CDP - When CDP is selected, the data can be displayed as a MAC Code power screen or
Data Code Power screen. In a MAC Code Power screen, Pilot & MAC power, Rho Overall
1, Rho Pilot, Data Modulation type and Noise Floor will be displayed, and the three stron-
gest pilots will be displayed in Over The Air (OTA) measurement mode available with Op-
tion 63 only. In a Data Code Power screen, Active Data Power, Rho Overall 1, Data Code
Max, Data Code Min and Data Modulation will be displayed, and the three strongest pilots
will be displayed in Over The Air (OTA) measurement mode available with Option 63
only.
Text Only - When Text Only is selected, the measurement results are dispalyed in a table
format.
Over The Air Measurement - Displays the Over The Air measurements, six strongest pilots,
Tau, Ec/Io, multipath related to the strongest pilot, Pilot Dominance, Pilot&Mac power,
Noise Floor, Rho Overall 1, Rho Pilot and Multipath power. Over The Air measurements
are available with Option 34 only.
RF Measurements - Can display idle/active slot in the time domain and frequency domain,
Pilot&Mac power, Frequency Error, Measured Occupied Bandwidth, Channel Power,
Idle/Active Activity and Idle/Active Data Power. RF Measurements are availabe with Op-
tion 62 only.
Measurements
The following measurement results are displayed on the Text Only screen.
Pilot & MAC Power - The Pilot & MAC power shows the average power of the Pilot and
MAC Channels. It is an absolute number expressed in dBm or Watts.
Data Power - Data Power is the average power of the Data Channel. When the slot is active,
the data power should be very similar to the MAC & Pilot power (less than 2.5 dB differ-
ence). When the slot is idle, the Data Power should be at least 7 dB below the MAC & Pilot
power if connected directly to a base station.
Channel Power - During an active slot, Channel Power should be similar to Pilot & MAC
power and also similar to Data Power. During an idle slot, channel power should be some-
where between the Pilot & MAC power and Data Power, since it is a weighted average of
the two.
Noise Floor - In the text box below the CDP diagram, the MAC CDP noise floor is re-
ported. It is the average power of the inactive MAC channels, relative to the total MAC
channel power, expressed in dB. When connected to a good EVDO source, the noise floor
should be –31.5 dB or below. When noise or distortion is present, for example in an
over-the-air measurement, the noise floor can be considerably higher.
18-4
Chapter 18 EVDO Mode