參數(shù)資料
型號(hào)： CM1481
英文描述： Non-Predictive Selcall Module
中文描述： 非預(yù)測(cè)Selcall模塊
文件頁(yè)數(shù)： 14/24頁(yè)
文件大?。?/td> 162K
代理商： CM1481
14
Functional Descriptions ......
The CM1481 can be configured to one of two modes of user control.
Dual Button
mode. The ‘Quiet/Open’ switch toggles the ‘Quiet/Open’ (mute) function; the
‘Tx Call’ switch initiates a Selcall ‘Tx Call’.
If it is required to operate in a unit with no local means of ‘Quiet/Open’ operation, this
dual-button mode should be configured but the ‘Quiet/Open’ input not connected
internally.
Single Button
mode. A single switch (push-button) connected to either ‘Quiet/Open’ or
‘Tx Call’ inputs controls both Mute and Selcall operations.
A “press” of less than 1-second will toggle the ‘Quiet/Open’ condition; a “press” of more
than 1-second will initiate a Selcall.
Both inputs can be configured to active “High” or “Low” polarities; with reference to the
CM1481, both inputs are connected, on-board, to the positive supply rail (V
DD
) via 47k
pullup resistors.
For an active “Low” input, the switches should be connected directly to 0V (GND).
For an active “High” requirement, the on-board pullup resistors must be considered.
Configured as Operation:
Single or
Dual Button
Operation
PTT In
(active "low")
Tx remains keyed
for ANI period
Mic key reset; signifying
end of conversation
Tx ON
(active "low")
Tone Out
Trailing
ANI
Leading
ANI
Automatic
Number
Identification
(ANI)
Quiet/Open
Tx Call
+ve
supply rail
pullup resistors
Fig.7 Operating Button Connections
Each unit is assigned a unique ANI code which enables identification of a transmission. In
the CM1481 this code is programmable, both by initial configuration and by over-air
re-configuration, as the ANI address.
When enabled the ANI code is transmitted at the beginning (leading) and/or the end
(trailing) of a transmission. In the CM1481 the ANI operation is selectable by configuration
to either OFF, Lead, Trail, or Lead and Trail.
If the PTT Time-Out function is activated, a trailing ANI (if configured) is transmitted
before shut-down.
Configured as ANI Mode: and ANI Address:
Fig.8 ANI Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CM1481-02DE 功能描述:電磁干擾濾波器 2-ch Headset Speaker EMI Filter with ESD RoHS:否 制造商:STMicroelectronics 電容:12 pF 電路類(lèi)型: 最大直流電流: 最大直流電阻: 電壓額定值:6 V 容差: 端接類(lèi)型:SMD/SMT 工作溫度范圍:- 30 C to + 85 C 系列:EMIF03
CM1482 制造商:CML 制造商全稱(chēng):Chicago Miniature Lamp,inc 功能描述:G-4 1/2 Miniature Bayonet Base
CM1482-02DE 功能描述:電磁干擾濾波器 2-ch Headset Mic EMI Filter with ESD RoHS:否 制造商:STMicroelectronics 電容:12 pF 電路類(lèi)型: 最大直流電流: 最大直流電阻: 電壓額定值:6 V 容差: 端接類(lèi)型:SMD/SMT 工作溫度范圍:- 30 C to + 85 C 系列:EMIF03
CM1483 制造商:CML 制造商全稱(chēng):Chicago Miniature Lamp,inc 功能描述:G-4 1/2 Miniature Bayonet Base
CM1483-02DE 功能描述:電磁干擾濾波器 L-C EMI Filter with ESD Protection RoHS:否 制造商:STMicroelectronics 電容:12 pF 電路類(lèi)型: 最大直流電流: 最大直流電阻: 電壓額定值:6 V 容差: 端接類(lèi)型:SMD/SMT 工作溫度范圍:- 30 C to + 85 C 系列:EMIF03
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