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參數(shù)資料
| 型號(hào)： | MT1530 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | UPSTREAM AMPLIFIER |
| 中文描述： | 上游放大器 |
| 文件頁(yè)數(shù)： | 6/14頁(yè) |
| 文件大小： | 427K |
| 代理商： | MT1530 |
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MT1530 U
PSTREAM
A
MPLIFIER
A
DVANCE
D
ATA
S
HEET
CATV A
PPLICATIONS
DS-00010
Rev 1.2 — December 2000
Page 6 of 14
P
8
DETAILED DESCRIPTION
This section describes the MT1530 functional blocks shown in Figure 12.
Serial
Interface
PA
Control
V
Variable Attenuator
V
Input Amp
Power Amp
Vout+ 16
Vout- 15
Vcm 14
CEXT
5 Vin+
6 Vin-
1
7
9
1
8
1
Figure 12
MT1530 Amplifier Block Diagram
8.1
FUNCTIONAL MODES
The MT1530 amplifier has three functional modes controlled through the serial
interface or external pins: transmit mode, transmit-disable mode, and shutdown
mode.
8.1.1
TRANSMIT MODE
Transmit mode is the normal active mode of the MT1530. The TXEN and
SHDN
pins
must be held high in this mode.
8.1.2
TRANSMIT-DISABLE MODE
Transmit-disable mode is typically used between bursts in TDMA systems. This
mode shuts off the power amplifier while keeping the input amplifier and variable
attenuator powered up. Taking TXEN low while keeping
SHDN
high and D7 = 1 (see
Table 5) activates this mode.
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