Overview

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Offline and Real-time Operations

Offline Dynamic DSP Operations

• Amplify ("AmplifyDspOp" - dynamic amplification)
• Attenuate ("AttenDspOp" - dynamic attenuation)
• Delay ("DelayDspOp" - dynamic delay)
• Filter ("FiltDspOp" - dynamic filter models)

Real-time Dynamic DSP Operations

• Delay / Attenuate ("AttenDspOp" and "DelayDspOp")
• Filter ("FiltDspOp")

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Schedule (*.csv) Files

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Test Script Execution

Offline Operators

• Attenuate DSP Operation


Example: The dynamic attenuate operation is implemented in WCS using the following script fragment:

set latency 4;
set response 6;
outfile(atten(tone(642 hz, -10 dbm), 20 db), "WinClientServer\DynDspOp\ DynScaleDspOp.ala") 60 sec cfg "WinClientServer\DynDspOp\DynDspOp.ini";



10 - 20 sec: Power = -26.21 dBov = -20.07 dBm.

Target power is -10 dBm (source signal power) -10 dB (attenuation) = -20 dBm. Observe that power tapers down over transition interval of 1 second.

• Delay DSP Operation


Example: The dynamic delay operation is implemented in WCS using the following script fragment:

set latency 4;
set response 6;
outfile(delay(tone(1000 hz, -10 dbm), 10 msec), "WinClientServer\DynDspOp\ DynDelayDspOp.ala") 60 sec cfg "WinClientServer\DynDspOp\DynDspOp.ini";



Between 20.0 and 21.0 sec., samples are repeated to insert more delay. Note the processing blocksize is 10 ms. For unclocked DSP operations (no tx or rx DSP operations), the processing block size is the sum of the latency and the response time.

• Filter DSP Operation


Example: The dynamic filter operation is implemented in WCS using the following script fragment:

set latency 4;
set response 6;
Dspop {outfile(filter(whitenoise(-10 dbm), "WinClientServer\DynDspOp\SOffice.xfr"), "WinClientServer\DynDspOp\DynFiltDspOpSin.ala"), outfile(whitenoise(-10 dbm), "WinClientServer\DynDspOp\DynFiltDspOpRin.ala") } 60 sec cfg "WinClientServer\ DynDspOp\DynDspOp.ini";

This script produces two output files:

DynFiltDspOpRin.ala: The original noise signal in A-Law compressed form.
DynFiltDspOpSin.ala: The dynamically filtered noise signal in A-Law compressed form.



0 - 10 sec: Power = -32.36 dBov = -26.21 dBm.

Target power is -10 dBm (source signal power) -16.36 dB (SOffice.xfr attenuation) = -26.36 dBm

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Real-time Operators

• Real-Time Delay/Attenuate ("delay" and "atten" DSP Operations)

Real-time testing of the dynamic filtering capability is carried as depicted in the following diagram:



Example: The dynamic echo path is implemented in WCS using the following script fragment:

set latency 4;
set response 6;
tx(atten(delay(rx(#2:1), 10 msec), 5 db), #2:1) 60 sec cfg "WinClientServer\DynDspOp\ DynDspOp.ini" priority 1;




• Real-Time Filter DSP Operation

Real-time testing of the dynamic filtering capability is carried as depicted in the following diagram:



Example: The dynamic echo path is implemented in WCS using the following script fragment

set latency 4;
set response 6;
tx(filter(rx(#2:1), " WinClientServer\DynDspOp\SOffice.xfr"), #2:1) 60 sec cfg "WinClientServer\DynDspOp\DynDspOp.ini" priority 1;



The small, medium, and large office filters at 5 secs, 15 secs, and 25 secs as set in the schedule file is clearly visible in the DEC view pane.

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Resources

Please Note: The XX in the Item No. refers to the hardware platform, listed at the bottom of the Buyer's Guide, which the software will be running on. Therefore, XX can either be ETA or EEA (Octal/Quad Boards), PTA or PEA (tProbe Units), UTA or UEA (USB Units), HUT or HUE (Universal Cards), and HDT or HDE (HD cards) depending upon the hardware.

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