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How do you find the frequency of a local oscillator?

How do you find the frequency of a local oscillator?

Assuming an intermediate frequency of 60 MHz, the local oscillator will track at a frequency of 60 MHz higher than the incoming signal. For example, suppose the receiver is tuned to pick up a signal on a frequency of 1030 MHz. The local oscillator will be operating at a frequency of 1090 MHz.

How do you calculate RF frequency?


  1. λ = C/f.
  2. λ (Lambda) = Wavelength in meters.
  3. c = Speed of Light (299,792,458 m/s)
  4. f = Frequency.
  5. The frequency of a waveform is the number of times a complete waveform is repeated in a fixed time period.
  6. The wavelength of a wave is the distance between two adjacent peaks or troughs of adjacent cycles.

How do you convert ppm to Hz?

Hi Gabriel, Multiplying the ppm value with the instrument frequency would give you Hz. If you want MHz, just devide your Hz value with 106. For example, 5 ppm in a 500 MHz NMR instrument would be 2500 Hz i.e. 0.0025 MHz.

What is local oscillator tracking?

In electronics, a local oscillator (LO) is an electronic oscillator used with a mixer to change the frequency of a signal. This frequency conversion process, also called heterodyning, produces the sum and difference frequencies from the frequency of the local oscillator and frequency of the input signal.

What is image frequency formula?

Image frequency rejection ratio (α) is given by: α=√(1+Q2ρ2)ρ=fsifs−fsfsi=23101400–14002310=1.043α=√(1+(1502×1.0432))=156.453.

Why local oscillator frequency is higher?

As a listener tunes across the broadcast band, the local oscillator is also tuned in synchronism so as to precisely produce a single-frequency signal (essentially an unmodulated carrier signal) which is higher in frequency by 455 kHz in comparison to the incoming signal.

How do I figure out frequency?

To calculate frequency, divide the number of times the event occurs by the length of time. Example: Anna divides the number of website clicks (236) by the length of time (one hour, or 60 minutes).

What is the unit of frequency?

hertz (Hz)
The SI unit for frequency is the hertz (Hz). One hertz is the same as one cycle per second.

How do I calculate frequency error?

Rearranging the above equation to solve for frequency error: Frequency error (fe) = signal frequency (fs) * frequency accuracy (fa).

What is ppm in Hertz?

If the spectrum is run at a magnetic field strength that generates precessional frequencies of 300 MHz (300 million cycles per sec, 7.05 Tesla), 1 ppm is equal to 300 Hz (300 cycles per second ). At 600MHz, 1 ppm = 600 Hz.

What is the working of oscillator?

Oscillators convert direct current (DC) from a power supply to an alternating current (AC) signal. They are widely used in many electronic devices ranging from simplest clock generators to digital instruments (like calculators) and complex computers and peripherals etc.

How do I reduce image frequency?

To suppress the unwanted image, the tuning of the RF stage and the LO may need to “track” each other. In some cases, a narrow-band receiver can have a fixed tuned RF amplifier. In that case, only the local oscillator frequency is changed. In most cases, a receiver’s input band is wider than its IF center frequency.

How do you use a Hartley oscillator calculator?

To use this calculator, a user simply has to enter the frequency desired. The frequency can be entered in hertz (Hz), kilohertz (KHz), and megahertz (MHz). The calculator will then compute the value of the 2 inductors and the value of the capacitor.

How do you calculate what to frequency to use in the local oscillator?

And secondly will this value of the local oscillator change for the receiving part ( where down conversion is reuired) and the transmitting part ( where up conversion of frequency to 2.4Ghz is required) ? I’m not going to give an answer based on your requirement but instead explain a little about the 100MHz commercial FM broadcast band.

How to calculate the resonant frequency of Hertz?

This resonant frequency is represented by the following equation: f = 1 / (2π √L C) Where: f is the resonant frequency in hertz (Hz), L is the inductance in henries (H), C is the capacitance in farads (F), π is the constant (3.141592654…) An example of a resonant frequency calculation

How are oscillations produced in an LC circuit?

Just like an RC circuit, oscillations are produced. RC circuits have a frequency according to the formula, frequency= 1/RC. LC circuits have a frequency according to the formula, frequency= 1/2πLC. LC circuits produce oscillations through the continual discharging and recharging of a capacitor.