Questions tagged [quadrature]
The quadrature tag has no usage guidance.
7
questions with no upvoted or accepted answers
2
votes
0answers
116 views
Offset QPSK Frame sync markers
What actual protocols exist out there that employ Offset Quadrature Phase-Shift Keying (OQPSK)?
What do they use for the frame synchronization marker (or "preamble" or "sync word" or "flag")?
Do ...
1
vote
0answers
66 views
Quadrature Encoder output overshoot
I have a Faulhaber 1717T006SR DC motor with a build-in quadrature encoder.
Here is the relevant bit of the datasheet for the encoder.
The encoder outputs are 5V.
I want to interface this with an ...
0
votes
0answers
48 views
Quadrature encoder (unknown) pinout
I have a quadrature photoresistor from a printer.
I want to determine the pinout. I can't find a datasheet for it. The case only shows "80058 - 96315" and I don't know the pinout.
The two ...
0
votes
1answer
100 views
Driving Stepper Motor with Sine Wave
I am attempting to drive a stepper motor where each phase draws 1 A at 3.5 V using a sine wave oscillator that outputs two signals 90 degrees out of phase with one another. At the outputs of this ...
0
votes
0answers
125 views
How to find the RMS value of a sine wave with DC offset and retain the negative sign
I'm trying to build a Quadrature setup where an input signal is mixed with a reference signal that is in-phase and another one out-of-phase by 90deg.
The idea is to extract the real and imaginary ...
0
votes
1answer
46 views
Output from a system of cascade connection with Wilkinson's divider and Quadrature hybrid
So I have this system, with
\$f=3GHz\$
\$b = \frac{λ}{4}\$
\$a = 0<a<b\$
and I want to know the output at ports 2 and 3.
I'm wondering how exactly I should approach it, and if my sketch is ...
0
votes
0answers
423 views
QAM Modulation Frequency vs Carrier Frequency
In QAM (Quadrature Amplitude Modulation) theory what is the relationship between the modulation frequency and the carrier frequency called?
It is often stated in QAM tutorials that the carrier ...
