User`s manual

5
1.4: EXTERNAL PROCESSOR REAR PANEL
The rear panel of the PCAP II Plus external processor appears as follows (Figure 1-):
DC power is provided to the unit through the external POWER jack by either the supplied external AC
adaptor or direct connection to a 9 - 18 VDC source. The POWER switch must be switched to the
ON position in order for the unit to operate.
A 9-pin RS232 jack is provided to connect the PCAP II Plus external processor to a computer using
the supplied cable. The unit automatically senses RS232 activity and is put into PC CONTROL mode
whenever the PCAP II Plus Master Control software establishes communication. After terminating the
software, the unit will return to stand alone mode after about 10 seconds (PC CONTROL mode is
indicated by the LED on the front panel).
Analog stereo input and output RCA jacks are provided on the rear panel. PCAP II Plus includes
digital S/PDIF input and output jacks as well. Using the INPUT SELECT switch, the user can select
which type of input (ANALOG or DIGITAL) to use. When DIGITAL input is selected, the PCAP II
Plus will automatically synchronize to any legitimate digital input signal over a continuous range of
sample rates from approximately 25kHz-108kHz. Both the ANALOG and DIGITAL outputs are
always active.
The output rate of the digital output can be selected using the OUTPUT RATE switch. On PCAP II
Plus, available output rate selections are 44.1kHz (standard, CD-compatible), 48kHz (professional,
DAT-compatible), and AutoSYNC. The 44.1kHz and 48kHz selections force the digital outputs to the
specified rate regardless of the input or processing sample rates; this is achieved through the use of
asynchronous sample rate conversion technology. In the case of AutoSYNC, the digital output rate
will synchronize to the digital input rate whenever the INPUT SELECT switch is set to DIGITAL, or
be forced to 44.1kHz when ANALOG input is selected.
Figure 1-4 PCAP II Plus Rear Panel