RAD Data comm ASM-10/8 - Manual (Page 27)

ASM-10/8 Installation and Operation Manual Chapter 2. Installation and Setup
09/10/00 16:26 Installation and Setup 2-3
Opening the ASM-10/8 Case
To reach the internal jumpers and switches of ASM-10/8, it is necessary to
open its case.
➤ ➤ ➤ ➤ To open the ASM-10/8 case:
1. Disconnect all the cables connected to ASM-10/8.
2. Turn the unit over (bottom facing up).
3. Unscrew the four cover screws.
4. Turn the unit over (bottom facing down).
5. After the four screws released, remove the ASM-10/8 top cover by
pulling it straight up.
Setting the Internal Jumpers and Switches
The internal jumpers and switches located on the ASM-10/8 printed circuit
board (PCB) are identified in Figure 2-1. Their numbers under heading
"Item" in Table 2-1 correspond to the identification numbers shown in
Figure 2-1.
1
2
3 4 5
6
7 0
V.54-DLY
ON OFF
SWITCH
EN DIS
RPF
ON OFF
AGC
CTRL ON
PIN 21
EN DIS
PIN 18
EN DIS
2W/4W
2W 4W
CARRIER
CTRL ON
CTS-DLY
0 ms 8 m
s
64 ms
RCV IMPD
150 300 600 HIG
H
XMT TIMING
INT EX RCV ASY
XMT IMPD
600 300 150 LO
W
XMT LEVEL
0 dbm -3
d
b
m
-6
d
b
m
-9
d
b
m
CHAS GND
DIS CO
NN
GND
GND
RCV
XMT
DTE
Fuse
S3
OFF OFF 8 BIT
ON=25%
OFF ON 9 BIT
ON
OFF 10 BIT
ON ON 11 BIT OFF=12.5%
S4 LEN S2(%)
S1
S2
S3
S4
1 2 3 4 5 7 9
10 11 12 13 15 14 16
8 6
Figure 2-1 ASM-10/8 PCB Layout