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Questions tagged [duplex]

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3answers
59 views

RS422 Full-Duplex Cable Shielding

I need to interface two PCBs via RS422 (250kbps) in full-duplex mode (4-wire, 2-twisted pairs 100ft cable). This system will operate in a noisy (CNC) industrial environment, ie, industrial controls ...
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1answer
141 views

Transmitter and Receiver antennas in mobile phones

I understand that in old cellular systems where FDD were employed, we used to have same antenna at the mobile phone (User equipment) for transmission and reception.Moreover, a duplexer was used to ...
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1answer
1k views

What is the difference between full duplex and dual simplex? [closed]

What is the difference between full duplex and dual simplex? I can not really distinguish the difference. Is it the fact that in full duplex, data can be exchanged simultaneously in both channels ...
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1answer
155 views

Fastest working Wireless communication method between two devices

I attempted to ask this question on the network engineering forum but the mods there think superuser.com is a better place for it, but when I posted there, they think here is the best place for this ...
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2answers
820 views

Is the communication between the USB or PS/2 keyboard and the computer simplex, duplex or half-duplex (unidirectional or bidirectional)?

I am curious to know if the communication between the computer and keyboards is unidirectional or bidirectinal. Until a few days ago i thought the communication is unidirectional because only the ...
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2answers
1k views

Does the Bluetooth protocol inherently support bidirectional data transfer?

Bluetooth is used for a lot of devices that send data in one direction: keyboards, mice, headphones. If it was designed for that, I would think that it was originally specified to only send data in ...
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1answer
34 views

Noise floor of a FM duplex

If these 2 signals, that form this duplex, have ranges of 15-30 [kHz] and 30-45 [kHz] using: \$NoiseFloor_{dBm} =10\log _{10}(k\times T_{0}\times 1000)+NF+10\log _{10}(BW)\$ and if \$K,T,F\$ and \$\...
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1answer
162 views

bi-directional half-duplex communication between two AT89C2051's micros without serial port

I'm trying to do a direct two-way communication between two AT89C2051 microcontrollers with only two GPIO pins so that I have other GPIO lines free for other tasks. P3.7 is the data wire, and P3.2 (...
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1answer
280 views

Simplex and Duplex are types of ______?

When describing telecommunication systems, it is often important to note whether it is a simplex, half-duplex, or a full duplex communication. In trying to explain this variable or attribute, I ...
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1answer
396 views

SPI Half-Duplex for the Holtic HI-3593 ARINC429 IC

I am having some problem understanding half duplex SPI. My understanding of SPI is when you send a byte you read the garbage byte, and if you want to read a value you send a dummy byte to read the ...
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3answers
12k views

Uart Full Duplex vs Half Duplex

When uC1 wants to talk to uC2 via uart, the Tx of uC1 is connected to Rx of uC2 and vice versa. Half Duplex states that only 1 uC can use the communication line at a time and Full Duplex states that ...