28
dBm
Advanced Channel Emulator
ACE9600
Operations Manual
Figure 2-10. RF Frequency display
S e ttin g RF Me n u P a ra m e te rs
S e t th e L-Ba n d In p u t Fre q u e n c y
Press the
RF in
frequency field for the desired channel
Enter a numeric frequency value (in MHz).
Press
MHz
or
Enter
to enter.
S e t th e L-Ba n d Ou tp u t Fre q u e n c y (Op tio n )
Press the
RF out
frequency field for the desired channel
Enter a numeric frequency value (in MHz).
Press
MHz
or
Enter
to enter.
Note that the output frequency is independent of the input frequency
only if the instrument hardware is configured for independent input and
output frequency. Otherwise, the input and output frequencies will
track. For this configuration, modify the
RF in
value, and the
RF out
value will change automatically.
S ta tic AWGN Op e ra tio n (Op tio n a l Fe a tu re )
The optional AWGN feature adds white Gauss
ian noise to the user’s
signal. There are two modes of operation 1) Ratio mode that sets the
noise density (N
o
) based on an E
b
/N
o
ratio, the measured signal power,
and the bit rate, or 2) Noise Density mode, that sets the noise density by
direct entry, irrespective of the signal level. The noise has a constant
power spectral density over the operating bandwidth of the instrument.
The ratio mode uses a true rms detector to measure the input signal
power. Ratio and Bit Rate settings in combination with this measured
power determine the applied noise density, such that the desired E
b
/N
o
ratio is achieved. The resultant noise density is displayed.