What is VCO mode?
A VCO (Voice Carry Over) phone is a special phone with a text readout that allows you to use VCO mode when making a relay call. A VCO phone supports two-line VCO mode and requires two separate phone lines for that mode.
What is TTY HCO and VCO mode?
TTY VCO mode is for hearing-impaired users who can send messages through voice, but need to receive messages on a TTY text display. TTY HCO mode is for users who can receive voice messages, but need to send text messages.
What is VCO sensitivity?
Tuning sensitivity is defined as the frequency change per unit volt of tuning voltage. The setup shown in Figure 1 can also be used for this measurement. For different tune voltages, the VCO frequency is read from the spectrum analyzer. The frequency measurements are plotted against the tune voltage.
Why do we use VCO?
Applications of VCO Function generator. Production of electronic music, for the production of different types of noise. Phase-locked loop. Frequency synthesizers, used in communication circuits.
What is digitally tuned VCO?
A digitally controlled oscillator or DCO is used in synthesizers, microcontrollers, and software-defined radios. The name is analogous with “voltage-controlled oscillator.” DCOs were designed to overcome the tuning stability limitations of early VCO designs.
What is RTT mode?
Real-time text (RTT) is a feature on the Apple® iPhone® that allows for those with hearing or speech impairments to carry on a conversational text via a phone call. When RTT is enabled on both devices, no audio is heard on the call.
What is output of VCO?
The VCO has an output power level of -3 dBm into 50 Ω with phase noise of -101 dBc/Hz typical at 100 kHz offset. The control voltage range is 0.4 to 2.4 volts, and load pulling is typically 0.75 MHz, pk-pk. Power supply pushing is 280 kHz/volt (typical).
What is VCO frequency?
Glossary Term: VCO A voltage-controlled oscillator (VCO) is an electronic oscillator whose output frequency is proportional to its input voltage. An oscillator produces a periodic AC signal, and in VCOs, the oscillation frequency is determined by voltage.
What is advantage of using filter in VCO?
c) Provides dynamic range of frequencies. Explanation: The charge on the filter capacitor gives a short time memory to the PLL. So, even if the signal becomes less than the noise for a few cycles, the dc voltage on the capacitor continues to shift the frequency of VCO, till it picks up the signal again.
What is VCO (voltage controlled oscillator)?
A voltage-controlled oscillator (VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency. Consequently, a VCO can be used for frequency modulation (FM) or phase modulation (PM) by applying a modulating signal to the control input.
What is a VCO and how is it used?
Consequently, a VCO can be used for frequency modulation (FM) or phase modulation (PM) by applying a modulating signal to the control input. A VCO is also an integral part of a phase-locked loop. VCOs are used in synthesizers to generate a waveform whose pitch can be adjusted by a voltage determined by a musical keyboard or other input.
What is the full form of VCO and VXO?
Oscillators whose frequencies are controlled using external input DC voltage are referred as VCO. The full form of VCO as mentioned is Voltage Control Oscillator. A voltage control crystal oscillator is known as VXO. They are used in applications where in voltage to frequency conversion is needed.
Can a VCO be used for frequency modulation?
Consequently, a VCO can be used for frequency modulation (FM) or phase modulation (PM) by applying a modulating signal to the control input. A VCO is also an integral part of a phase-locked loop.
