Phase Offset Files; Awgn Files; Rf Frequency Files (With L-Band Converter Option) - DBM ACE9600 Operating Manual

dBm
ACE600
Operations Manual
Advanced Channel Emulator
•
Each data line consists of eight or 10 characters, depending on
resolution, including a decimal point
•
Range is 0 to ± 6000KHz in 1 Hz or 0.01Hz resolution
•
Step size between any two adjacent points can be up to ±
32,767 times the resolution.
•
Units are kHz
In Dynamic mode, Frequency offset resolution is 0.01 Hz if there are 5
decimal places in the first data point in a frequency offset file, eg. x.12345
will invoke 0.01 Hz resolution. Otherwise, resolution will be 1 Hz.
P h a s e Offs et File s
Dynamic phase offset is driven by data files containing the value of
absolute phase shift. The phase offset update rate is the same as that
selected for delay, frequency offset, attenuation and AWGN.
Each data line consists of five characters in a "xxx.x" format
•
•
Range is 359.9 degrees in 0.1 degree steps.
•
Step size between any two adjacent points is unlimited
•
Units are degrees
AWGN File s
When noise density is enabled in static mode (either by direct entry or
via Eb/No calculation), the noise will remain enabled at that level when
the ACE9600 mode is changed to dynamic. If awgn is not desired in
dynamic mode, it must be set to off in static mode. When a dynamic
awgn file is loaded, awgn is automatically enabled, irrespective of
whether it was on or off in static mode. Once enabled in dynamic
mode, awgn cannot be disabled without returning to static mode.
Dynamic awgn is driven by data files containing the value of absolute
noise density (for example, -95.23 dBm/Hz). The AWGN update rate is
the same as that selected for delay, frequency offset, and attenuation.
• Each data line consists of seven characters in a "-xxx.xx"
format
•
Range is 60 dB in 0.01 dB steps. The largest absolute noise
density value is instrument dependent.
•
Step size between any two adjacent points is unlimited
•
Units are dBm/Hz
The range of control for the noise density is 60 dB. However, the usable
range may be less, as it is limited by the maximum density the instrument
can produce and the intrinsic noise floor of the instrument. Additionally,
when AWGN is active, the channel attenuation should be limited to less than
32 dB.
RF Fre q u e n c y File s (With L-b a n d Co n ve rte r Op tio n )
When L-band frequency converters are installed in the ACE9600, the
tuned center frequency can be varied dynamically. Depending on the
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