參數(shù)資料
型號(hào): PCL-818L
廠商: Electronic Theatre Controls, Inc.
英文描述: High-performance DAS card with programmable gain
中文描述: 高性能DAS的可編程增益卡
文件頁(yè)數(shù): 34/74頁(yè)
文件大?。?/td> 546K
代理商: PCL-818L
30
PCL-818L User's Manual
A/D range control BASE+1
Each A/D channel has its own individual input range, controlled by a
range code stored in on-board RAM and the setting of jumper JP7. If
you want to change the range code for a given channel, select the
channel as the start channel in register BASE+2, MUX scan (de-
scribed in the next section), then write the range code to bits 0 and 1
of BASE+1.
BASE+1 (write only) A/D range control code
Bit
D7
D6
Value
N/A
N/A
D5
N/A
D4
N/A
D3
N/A
D2
N/A
D1
G1
D0
G0
Range codes and JP7 settings appear below:
Input range
JP7 = 5 V
±5 V
Range code
G1
0
JP7 = 10 V
±10 V
G0
0
±2.5 V
±5 V
0
1
±1.25 V
±2.5 V
1
0
±0.625 V
±1.25 V
1
1
MUX scan register BASE+2
Read/write register BASE+2 controls multiplexer (MUX) scanning.
The high nibble provides the stop scan channel number, and the low
nibble provides the start scan channel number. The MUX is initialized
automatically to the start channel when you write to this register. Each
A/D trigger sets the MUX to the next channel.
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