ACB-100 Audio Control Board
Page 2
Document IM-ACB-100-2.5
DSP Daughter Cards
Two versions of the printed circuit board used in the ACB-100 have been produced. The latest printed circuit
board is designated as PC06487-02, while the earlier version was designated as PC06487-01 or PC06487. The main
difference between the two boards is the location of the headers on the printed circuit board and the label names
assigned to the headers. In the following description the labels associated with the -01 version of the printed
circuit board are given in brackets.
The ACB-100 has one factory installed DSP, and headers for inserting two DSP daughter cards. Each daughter
card contains two DSPs. The factory installed DSP is labeled DSP #1. The daughter card inserted in header CN20
(CN1) contains DSPs labeled DSP #2 and DSP #3, while the daughter card inserted in header CN21 (CN2)
contains DSPs labeled DSP #4 and DSP #5. The following diagrams show the location and #1 pin of the headers
CN20 (CN1) and CN21 (CN2). If a daughter card is not installed in CN20 (CN1) and/or CN21 (CN2) headers
four shorting jumpers must be installed in positions 1-2, 3-4, 5-6 and 7-8 at the right hand end of the DSP
daughter card header.
Status
#1
#2
#3
Master
Reset
Card
Reset
Connect
Backup
Service
CEPT1
CEPT2
R
T
R
T
LINK
1 CN
2
56
CN
1
56
1
1
CN
1
4
50
33
17
18
34
1
15
81
9
8
15
1
9
LINK
Audio/
CEPT
CEPT
Daughter
Card
DSP
Daughter
Card
DSP
Daughter
Card
ACB
100
PC
-0464
87
-01
PC
-046487-
01
Header Location for DSP Daughter Cards on PC06487-01