User`s manual

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5: . OPERATING PCAP II STAND-ALONE
Before the PCAP II Plus external processor can be operated Stand-Alone, at least one of the Stand-
Alone setup memories must be programmed using the procedure in Section 4.10.1: .
Operate the PCAP II external processor as a Stand-Alone audio processor as follows:
1. Connect 12VDC power, and switch the POWER switch ON.
2. For analog sources, connect the signals to be processed to the rear panel LEFT and RIGHT
ANALOG INPUTS RCA jacks and set the INPUT SELECT switch to ANALOG for most
filtering applications. For Ref Canceller adaptive filtering applications, the original (PRI) audio
is input to the LEFT (white) RCA, while the noise reference (REF) audio is input to the
RIGHT (red) RCA. Alternatively, connect a digital signal source to the S/PDIF digital INPUT
(white) RCA jack and set the INPUT SELECT jack to DIGITAL.
3. Adjust the front panel LEFT and RIGHT INPUT LEVELS controls such that the tricolor
LEDs indicate GREEN most of the time, with occasional YELLOW peaks.
4. Connect any recorder with analog inputs to the rear panel LEFT (white) and RIGHT (red)
ANALOG OUTPUTS RCA jacks if recording the processed audio is desired. Alternatively,
connect a recorder with digital input to the rear panel S/PDIF digital OUTPUT (red) RCA jack
and select the desired recording sample rate using the OUTPUT SAMPLE RATE switch
(44.1kHz is normally recommended, especially if the material is to be transferred to compact
disc).
5. Plug stereo headphones into the front panel PHONES jack. Adjust the level control to a
comfortable listening VOLUME.
6. Select the desired Stand-Alone memory by switching the MEMORY switch to one of the ten
positions.
7. Initially, set the front panel ADAPT/FREEZE, PROCESS/BYPASS, and AUX/OFF switches
to ADAPT, PROCESS, and AUX (all switches in).
While listening with the stereo headphones, switch the MONITOR switch between INPUT and
OUTPUT to hear the difference between the original and processed audio, respectively. Normally, the
MONITOR LEFT and RIGHT pushbuttons are kept pushed in, but either (or both) can be pushed out
at any time to listen only to either the left or right channel audio, or to mute all headphone audio. You
may make the following adjustments to the processor at any time:
1. To freeze all adaptive filters in the process, switch the ADAPT/FREEZE switch to FREEZE.
To allow the adaptive filters to adapt to changing signals, switch to ADAPT.