Pico Macom MMA860 Manual de usuario

MMA860

Descriptions

The MMA860 is a professional grade microprocessor-controlled agile audio/video mini-

modulator.This modulator accepts any audio-video baseband television signal and provides

a 45dBmV minimum output on CATV channels 2 to 135 (54-860 MHz). Channel selection is

easily accomplished via channel up/down buttons located on the front panel. Up to 12 or 16

units can be installed “mix-and-match” in Pico Macom’s MPC-12, MPS-12, MPC-12R

chassis with MPCM45 mini-modulators or MPCD mini-demodulators. Its unique design

enables it to be installed in other manufacturers’ mini-mod chassis.The unit’s tracking filter

technology and double-heterodyne conversion ensure accurate and spurious-free output.

The MMA860 uses SAW filtering in conjunction with FCC group delay correction circuitry to

provide superior adjacent channel selectivity.The unit’s PLL circuitry in conjunction with the

non-volatile memory contained in the microprocessor ensures easy and reliable channel

selection and restoration.The MMA860 modulator is shipped with all internal adjustments

preset. Pico Macom backs up this product with its industry leading 5-year limited warranty.

Universal-Chassis Mini-Agile Modulator

MMA860

135-Channel Range 54-860 MHz

(CATV 2-135)

>45dBmV min adjustable output

for optimum carrier-to-noise

performance

Compatible with most manufac-

turers mini-modulator chassis

State-of-the-art digital phase-

locked-loop (PLL) design guaran-

tees precise frequency locking for

solid drift-free operation

Microprocessor control enables

quick digital push-button channel

selection for ease of installation,

configuration, and improved sys-

tem uptime

SAW (surface acoustic wave)

filtered for superior adjacent

channel performance enables

drop-in channel expansion

In-band carrier-to-noise ratio

>65dB ensures superior picture

quality

Automatic selection of aeronauti-

cal offsets (12.5kHz, 25kHz) for

trouble-free configuration

Front panel access to controls

enables easy setup

Universal-Chassis Mini-Agile Modulator

1Ph:800-421-6511 www.picomacom.com

MMA860

Specifications

Universal-Chassis Mini-Agile Modulator

www.picomacom.com

Ph:800-421-6511

Frequency Range: NTSC 54 to 860 MHz

Output Level : +45 dBmV (minimum – 15dB

adjustment range.)

Output Impedance : 75 Ohms

A / V Ratio : Audio carrier level, adjustable

from – 8 to –35 dB (±3dB)

Referenced to video carrier

level.

Frequency Stability : ±5KHZ

Intercarrier Frequency : 4.5MHz ±3.0KHZ

Spurious Outputs : 60 dBc typical, measured at

–15 dB A/V ratio and with

Modulator output level of + 45

dBmV.

Video Input for 87.5%: 0.6Vp-p to 1.5 Vp-p. Manual

gain adjust with front panel

control.

Modulation:

Input Impedance: 75Ohms

Frequency Response: 20Hz to 4.2 MHz ±1dB

Video

Input Level for 25KHz: 100 mVrms to 3 mVrms.

Manualgain adjust with front

panel.

Peak Diviation

Input Impedance: Greater than 10KOhms,

unbalanced.

Audio

General

DC Power Input: +12V ±5% at 200 mA typical,

230 mA maximum.

+5 V ±5% at 320 mA typical,

380 mA maximum

Operating Temperature: 0°C to + 50 °C ambient.

Size: 1”W * 3.5”H * 7.5” D *

Weight: 10.7 oz.. (0.3 Kg)

MMA860

PICO MACOM

Video

Audio

Power

Mini Agile Modulator

A/V

001

----

++++

CATV

+100

Related Products

MOR-CS

MPC-12 PHC-24G

MPC-12R PHC-12G

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