QCBOX AMPLIFIER & SWITCH BOX MODEL 4 USER'S MANUAL AUDIOMATICA
© Copyright 1991-2004 by AUDIOMATICA SRL All Rights Reserved Edition 5.0, January 2004 IBM is a registered trademark of International Business Machines Corporation. Windows is a registered trademark of Microsoft Corporation.
CONTENTS 1 - THE QCBOX MODEL 4 AMPLIFIER & SWITCH BOX.............................................. 3 2 - TECHNICAL SPECIFICATIONS ............................................................................... 3 3 - GENERAL CONDITIONS AND WARRANTY ............................................................ 4 4 - INTERNAL FUNCTIONAL DIAGRAM ....................................................................... 5 5 - BASIC CONNECTIONS ........................................................................
1 - THE QCBOX MODEL 4 AMPLIFIER & SWITCH BOX The QCBOX Model 4 amplifier and switch box is of invaluable help in everyday laboratory use and when configuring an automatic or manual quality control setup. The QCBOX Model 4 has an ultraslim design, increased power (50W@8Ohm) with respect to its predecessors Model 1, 2 & 3 and wide range AC (90÷240V) power supply.
3 - GENERAL CONDITIONS AND WARRANTY THANKS Thankyou for purchasing your QCBox Model 4. We hope that your experiences using QCBox Model 4 will be both productive and satisfying. CUSTOMER SUPPORT Audiomatica is committed to supporting the use of the QCBox Model 4, and to that end, offers direct support to end users. Our users all around the world can contact us directly regarding technical problems, bug reports, or suggestions for future software enhancements.
4 - INTERNAL FUNCTIONAL DIAGRAM The first diagram shows us the unit set for impedance measurements (in Internal Mode referring to CLIOwin software, see chapter 13 of the User's Manual); in this situation the power amplifier and inputs are disconnected while the speaker load is presented in parallel with CLIO's input and output; this method of impedance measurement relies on the precise knowledge of the analyzer's output impedance and stimulates the D.U.T with signals of small amplitude.
5 - BASIC CONNECTIONS The following diagram shows the basic connections needed to operate the unit. INPUT A INPUT B CLIO OUTPUT A OUTPUT B LPT PORT TTL CONTROL I SENSE BLACK RED FROM CLIO QCBOX MODEL 4 AMPLIFIER&SWITCHBOX INPUT 1 TO CLIO INPUT 2 INPUT 3 INPUT 4 AC POWER 90 - 240 VAC Please connect (referring to the front panel): 1) A pin-to-pin cable from the "From CLIO" RCA plug to CLIO's output. 2) A pin-to-pin cable from the "To CLIO" RCA plug to CLIO's input.
6 - DEFAULT INTERNAL SETTINGS The QCBox Model 4 can be operated also if the TTL control cable is not connected to the parallel port of the PC. In this particular case, when software control doesn't take place, the unit operates in the following mode: Internal setting: frequency response. Input: enabled input 4. I SENSE: enabled.
7 - PARALLEL PORT CONFIGURATION The parallel port you use to control the QCBOX Model 4 must be configured in STANDARD (or NORMAL or AT) mode. Be sure that the parallel port is NOT in ECP mode otherwise the software control won't take place. There is a simple way to check if the parallel port is properly configured. Click with the right mouse button on the 'My Computer' icon on the Windows desktop. Then click 'Properties', select the 'Hardware' tab and press the 'Device Manager' button as in figure.
do this is from within BIOS settings at the computer startup. This is usually accomplished pressing a particular key or sequence of keys while your PC is booting; the correct key to press normally shows up during the early booting of the computer: the most common is the ‘Del’ key but you may need to press ‘F2’ or a different one. When inside BIOS you should locate a menu like ‘INTEGRATED PERIPHERALS’ or 'PERIPHERALS SETUP' inside which there are listed the peripherals present and their settings.
8 - SOFTWARE CONTROL It is possible to control the QCBOX Model 4 from the CLIOwin software. Run CLIOwin, then click on the External Hardware Button (or simply press Shift-F4). Select the proper parallel port and choose Model 4 in the 'Type' drop down. The control should be active; an acoustic confirmation should come from the internal relays, you should hear them clicking when changing inputs. Please refer to the CLIOwin User's Manual for executing frequency response and impedance measurements.
10 - CUSTOM CONTROL The TTL Control connector can be used for a direct link to a PC printer port with a standard 25 poles male-female cable. The following figure shows the D-25 connector pinout and the device's truth table for selecting its appropriate internal function.
- INTERNAL SETTINGS AND TROUBLESHOOTING If you want to make one of the possible internal settings disconnect the unit from the mains power and then carefully open the unit; locate SW2 from the figure below and make the appropriate selection. It is possible, using the dip switch SW2, to select a phantom power supply of 8.2V on each input separately (to power an Audiomatica MIC-01 or MIC-02 microphone). When a switch is ON the phantom power is present at that input.
