M-ACPA Technical Chapter
Version 1.01 (14.08.98)

Layout of the "Ultimedia ACPA"
P/N 92F1255
                                                                                      
                                                                                      
                                                                          +--------+      
                                                                          +----+ +++      
 +------------------------------------------------------------------------+    + ++       
 |  +-------+                              P4                  J2         |    +-++       
 |  | OSC1  |                      15 o o o o o o o o 1     1 oooo 4      +----+ +        
 |  +-------+               /---+  16 o   o o o o o o 2                        | |        
 |  /-----------+           |   |                                       +------| |        
 |  |           |           +---+                                       |      | | <- In  
 |  |           |                      +-------+                        +------| |        
 |  |           |                      |  REL  |                        +------| |        
 |  |           |                      +-------+                        |      | | <- Mic 
 |  |           |                                                       +------| |        
 |  +-----------+    +-----------+                                      +------| |        
 |  +---------+      |     o     |      +---------+                     |      | | <- Out 
 |  |         |      |           |      |         |                     +------| |        
 |  +---------+      |           |      +---------+                     +------| |        
 |  +---------+      |           |                                      |      | | <- Spkr
 |  |         |      |           |                                      +------| |        
 |  +---------+      +-----------+                                             | |        
 |                                                                             | |        
 +-------------------+------+-+-------------------------+------------+         | |        
                     |HHHHHH| |HHHHHHHHHHHHHHHHHHHHHHHHH|            |         | |        
                     |HHHHHH| |HHHHHHHHHHHHHHHHHHHHHHHHH|            |         | |        
                     +------+ +-------------------------+            +---------+-+        
                                                                                      

                      J2 1 = CD Audio In R
                         2 = GND
                         3 = GND
                         4 = CD Audio In L

                      P4   = Multimedia Frontpanel
                             (undocumented)


Layout of the "short, standard ACPA"
P/N 92F1288
                                                                                      
                                                                                      
                                                                      +--------+      
                                                                      +----+ +++      
 +--------------------------------------------------------------------+    + ++       
 |  ::1o=o   +-------+  1o o o                         1o o o         |    +-++       
 |  :: JPR3  | OSC1  |     J3                             J2          +----+ +        
 |  ::       +-------+           /---+                                     | |        
 |  ::   /-----------+           |   |      +-------+               +------| |        
 |  ::   |           |           +---+      |  REL  |               |      | | <- In  
 |  ::   |           |                      +-------+               +------| |        
 |  ::   |           |                                              +------| |        
 |  ::   |           |                    +---------+               |      | | <- Mic 
 |  ::   |           |                    |         |    1o o o     +------| |        
 |  ::   +-----------+    +-----------+   +---------+       J1      +------| |        
 |  ::   +---------+      |     o     |                             |      | | <- Out 
 |  ::   |         |      |           |                             +------| |        
 |  ::   +---------+      |           |                             +------| |        
 |  ::   +---------+      |           |                             |      | | <- Spkr
 |  ::   |         |      |           |                             +------| |        
 |  ::   +---------+      +-----------+                                    | |        
 |  ::                                                                     | |        
 +---------------+------+-+-------------------------+------------+         | |        
                 |HHHHHH| |HHHHHHHHHHHHHHHHHHHHHHHHH|            |         | |        
                 |HHHHHH| |HHHHHHHHHHHHHHHHHHHHHHHHH|            |         | |        
                 +------+ +-------------------------+            +---------+-+        
                                                                                      

                      J1 1 = GND
                         2 = CD Audio R
                         3 = CD Audio L
 
                      J2 1 = GND
                         2 = AUX In R
                         3 = AUX In L
 
                      J3 1 = GND ?
                         2 = JPR3/1
                         3 = GND ?


Specs and Technical Data

Marketing Part Number :  92F3379 (92F1255 and 92F1288 resp.)
Service Part Number   :  95F1256
Feature Code          :  3909
POS ID                :  6E6C

 
                                                    
  Sample Width         Sampling Rate         Data Size
                                             (KB/sec.)
-----------------------------------------------------------
      8-bit            8.000 KS/second            8
      8-bit           11.025 KS/second           11
      8-bit           22.500 KS/second           22
      8-bit           44.100 KS/second           44
     16-bit            8.000 KS/second           16
     16-bit           11.025 KS/second           22
     16-bit           22.500 KS/second           44
     16-bit           44.100 KS/second           88
-----------------------------------------------------------
          (KS/second = 1000s samples per second)
 

  Audio Mode                          Data Size
                                     in KiloBytes
                                     (estimated)
-----------------------------------------------------------
  Compact disc 16-bit Stereo            10,500
  16-bit PCM 22.050 KS/sec. - Mono       2,640
  8-bit  PCM 11.025 KS/sec. - Mono         660
  Voice - Mono                             330
  MIDI - Stereo                             12 *
-----------------------------------------------------------
  (* Note:  MIDI cannot be used to store the human voice.)


ACPA Specifications

Input Analog Performance

Input Sampling Rate         44.1 KHz (stero)
                            88.2 KHz (mono)
Input Channel Bandwidth     12 Hz to 20 KHz
                            3dB cutoff (typical)
Dynamic Range               16-bit resolution
Signal-to-noise ratio       80dB (typical)
Line level input impedence  30K ohms (typical)
Line level voltage          7 volts peak-peak max.
Microphone input impedence  20K Ohms (typical)
Microphone gain             +33/+45 dB
S(N+D)                      78 dB (typical)

Output Analog Performance

Output Sampling Rate        88.2 KHz Both Channels
Output Channel Bandwidth    12 Hz to 24 KHz
                            3dB cutoff (typical)

Dynamic Range               16-bit resolution
Signal-to-noise ratio       80dB (typical)
Line level input impedence  10K ohms minimum
Line level voltage          7.0 volts peak-peak max.
Speaker/Headphone drive     at least 4 ohms or over
Speaker power               110 mw typical (8 ohm load)
S(N+D)                      78 dB (typical)


Connectors

Microphone input (1)        Mini-phone jack (3.5mm)
Speaker (1)                 Mini-stereo phone jack (3.5mm)
Line (2: 1 In, 1 Out)       Mini-stereo phone jack (3.5mm)

Test Condition              1 KHz, +7 dBV

Power Consumption

   +5V                        1.5 A
  +12V                        55 mA
  -12V                        55 mA


 Note: The 55 miliamps from the -12 volts exceeds the 40
       miliamps per slot available in the MicroChannel
       computer. This will not cause a problem in most
       systems, since most boards use very little -12 volt
       power.
From:
IBM Audio Capture & Playback Adapter
Installation and Reference Manual
P/N 34F2795
(written and published for IBM by Tecmar)


Related Software

M-ACPA option / driver disk
macpaopt.exe

The DOS software 1 & 2
macpab1.exe macpab2.exe

The Win 3.x drivers
macpawin.exe

The WIN-CSD drivers
macpacsd.exe




Waiting for your responses and comments !

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