Name: 16 Channel Analog Agile Modulator - NTSC PAL SECAM
Brand: Thorbroadcast
Price: 1995 USD
Availability: InStock

Descripción

While NTSC is quickly becoming legacy equipment, there is still a need for headends requiring Analog modulation. This unit simplifies the installation because of the high density capacity of 16 independent inputs.
The Inputs are in CVBS RCA baseband video / audio inputs. Analog CVBS inputs can be connected from items like Security Cameras, DVD/VCR player, Set-Top Box, Old Video players, or older gaming systems like Playstation, Nintendo 64.
The High Power RF Output allows for video distribution to many TV's on the same coax network without RF amplifiers.
Common applications used are video security monitoring, Hotels, Motels, Education, Private anonymous channels, music channels, radio channels, coax network testing.
It is SAW filtered and microprocessor controlled with an output capability of 860MHz. Setup and tuning is easy and simple via the front panel. The unit offers high performance, low cost comparable to digital modulators and compact design for system operators. Also features an RJ45 port for ethernet connection to the NMS management system which allows you to manage, remote access, and change settings.

Caracteristicas

SAW filtering for maintenance free adjacent channel configuration
High RF CATV RF output power
CATV RF 45-870Mzh Spectrum
Universal worldwide use supports NTSC, PAL, or SECAM output
Double I.F loop for superior in-band C/N
16 Agile channel output
Fewer cables and connectors but greater reliability
Rack-mountable 1RU space
Front panel accessible level controls for easy set-up and adjustment
NMS RJ45 port for network access and management system

Dibujos

Selección de modelo

H-16RCA-RF-AMOD - 16ch RCA CVBS Analog Baseband Video / Audio to 16 CATV RF NTSC Agile modulator

H-16RCA-RF-AMOD-PAL - 16ch RCA CVBS Analog Baseband Video / Audio to 16 CATV RF PAL Agile modulator

Similar model but with HDMI inputs:

H-16HDMI-RF-AMOD - 16 HDMI Inputs - 16 Analog RF Out (NTSC)

H-16HDMI-RF-AMOD-PAL - 16 HDMI Inputs - 16 Analog RF Out (PAL)

https://thorbroadcast.com/product/16-hdmi-to-analog-agile-catv-rf-modulator-ntsc-8230.html

Especificación

OUTPUT

RF

Output Connector

F Connector @ 75Ohms

Output Frequency

45~860MHz any 16 channels

Output Level

113 dBµV (Adj.) = +53dBmV

Out-band Rejection

≥60dB

A / V Ratio

-21~ -18 dB (Adj.)

Frequency Stability

±5kHz

Test Point

-20 dB ±3dB

INPUT

MANAGEMENT	Front Panel	NMS IP - 10/100 Ethernet , DefaultIP 192.168.1.30

VIDEO

Video-Input Level

0.6-1.5Vp-p (87.5% Modulation)

Input Connector

1x Yellow RCA Jack

Video C/N

60dB

AUDIO

Input Level

0.8Vp-p(25KHz Peak Deviation)

Input Connector

1x White RCA Jack

GENERAL

POWER AND SIZE

Voltage

AC 90 ~ 264V @ 47~63Hz

Power Consumption

100W

Cooling Fans

3

Dimension

48.4*32.9*4.44 (CM)

Carton Size

55*39*13 (CM)

Shipping Weight

12lb (6KG)

Question and Answers

Question:

What is analog modulation, and why is it different from digital modulation, like QAM?

Answer:

Analog modulation is a technique used to transmit analog signals, typically low-frequency baseband signals, over higher-frequency carriers, such as those in the radio frequency (RF) range. This process is essential for communication systems like radio broadcasting and analog television. Here's a detailed breakdown of the key components:

Baseband Signal: This is the original analog signal containing the information to be transmitted, such as audio or video signals. It is usually a low-frequency signal.
Carrier Signal: The carrier signal is a higher-frequency signal that is modulated by the baseband signal. This carrier provides the means to transmit the information over longer distances and through different mediums.
Modulation Process: The baseband signal modulates the carrier signal, altering its characteristics in accordance with the variations in the baseband signal. The goal is to impress the information from the baseband signal onto the carrier.
Types of Analog Modulation:
- Amplitude Modulation (AM): The amplitude of the carrier signal varies in proportion to the instantaneous amplitude of the baseband signal.
- Frequency Modulation (FM): The frequency of the carrier signal changes based on the instantaneous frequency of the baseband signal.
- Phase Modulation (PM): The phase of the carrier signal is modified in response to changes in the baseband signal.
Transmission: The modulated signal is transmitted over the communication channel, which could be air (for wireless communication) or cables (for wired communication).
Demodulation: At the receiving end, the modulated signal is demodulated to extract the original baseband signal. This process allows the recovery of the original information for further processing or reproduction.

Analog modulation is widely used in applications where continuous and smooth variations of signals are crucial, such as in traditional radio and television broadcasting. However, it's important to note that analog modulation is being gradually replaced by digital modulation in many modern communication systems due to the latter's advantages in terms of signal quality, noise resistance, and data compression.

Digital modulation, on the other hand, deals with discrete signals, representing information in the form of bits (0s and 1s). In the case of QAM, which stands for Quadrature Amplitude Modulation, both amplitude and phase of a carrier wave are adjusted to encode multiple bits simultaneously. QAM is widely used in digital communication systems, including cable television and digital radio. It provides more efficient use of bandwidth and is generally more robust against noise and interference compared to analog modulation.

Differences:

Signal Representation: Analog modulation transmits continuous signals, while digital modulation transmits discrete signals represented by binary code.
Noise Susceptibility: Analog signals are more susceptible to noise, leading to potential signal degradation. Digital modulation, including QAM, allows for more robust error correction, making it less prone to noise.
Bandwidth Efficiency: Digital modulation techniques often allow for more efficient use of available bandwidth compared to analog modulation. QAM, in particular, enables the transmission of multiple bits per symbol, enhancing data rates.
Quality of Signal: Analog modulation retains the continuous nature of the original signal, preserving its quality but making it more vulnerable to noise. Digital modulation provides better signal quality over longer distances and in challenging environments.