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雙通道ADC顯示控制模組

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更新時(shí)間：2021-08-25 09:09:52瀏覽次數(shù)：299次

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GeneralThemodel4161Aisadualchannel

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General
The model 4161A is a dual channel, analog to digital converter (ADC) module which will measure one or two analog voltages, display the result on a digital panel meter, and allow it to be read by an external computer connected to the module's RS232 or GPIB interface.

The module has two signal input channels, A and B, each with a full-scale sensitivity of ±10 V DC. On receipt of a trigger commａnd at the appropriate channel the input voltage is digitized to a 5 mV resolution. A computer coupled to the module can determine the value of the input voltage by sending a simple ASCII command. The 3½ digit panel meter on the 4161A can be switched to monitor either of the signal channels.

Input
ChannelsTwo
ADC InputsBNC front-panel connectors, A and B
Input Impedance1 MΩ
Input Full-Scale±10 V
Accuracy±5 mV
Linearity±5 mV
ADC Trigger InputsBNC front-panel connectors, corresponding to channel A and channel B ADC inputs. Connectors are duplicated on rear-panel
Trigger ThresholdsTTL. Triggers on rising edge of applied positive logic TTL pulse
Digital Display
Type3½ digit LED display showing (Measured voltage / 20)
Display SelectionSwitch selects channel A or channel B
Computer Interfaces
RS232DIP switch selectable baud rate, terminator, character echo, parity and data bits
GPIBDIP switch selectable address and terminator
Status IndicatorsFront panel LEDs indicate GPIB Talk, Listen, SRQ and Remote
Commａnd SetTwelve mnemonic type commands allowing both asynchronous and synchronous readings. Digitized voltages are reported back to the computer in integer format, with ±2048 corresponding to an input voltage of ±10.24 V
Output
Busy OutRear-panel BNC connector generating TTL signal which under computer control will:-
1) Remain at logic 0 until a synchronized read commａnd is issued by the computer.
2) Go to logic 1, releasing external trigger hold-off circuitry (such as can be provided by the SIGNAL RECOVERY model 9650A).
3) Return to logic 0 on receipt of a trigger signal at either the A or B ADC trigger inputs, and remain there while the measured value(s) are transferred back to the computer and thereafter until the next synchronized read command
Analog Panel Meter
TypeEdge-indicating meter monitoring the voltage at the associated front-panel analog input BNC connector. This meter is completely independent of the analog to digital converter functions
Input Impedance10 kΩ
Full-scale sensitivity±10 V
Power Requirements+24 V at 50 mA; -24 V at 50 mA
+12 V at 600 mA; -12 V at 30 mA
+6 V at 550 mA; -6 V at 10 mA
Dimensions
Height8¾" (222 mm)
Width2¾" (70 mm)
Depth9¾" (248 mm)
Weight2.5 lb (1.14 kg)


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