Pico Macom PCM55 Manuel utilisateur

PCM55

The PCM55 is Pico Macom’s legendary workhorse—a cost effective pro-

fessional grade modulator designed to provide adjacent channel compatibility

and FCC Docket 21006 for frequency accuracy.This modulator provides a

full 55dBmV output from sub-band channels T8 through T11, CATV channels

2 to 22 including channels 95 to 99 while accommodating HRC and IRC offset

frequencies (11.75-216MHz). Modulated channels may be inserted on any

unused channel within a closed circuit MATV or SMATV system. High quality

external modulation and RF level controls assure years of reliable operation.

The modulator is shipped with all internal adjustments preset. Pico Macom

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

PCM55

216MHz Single Channel Crystal Controlled A/V Modulator

www.picomacom.com

Headend & Electronics

355 Parkside Drive San Fernando, CA 91340

Ph: 818-493-4300 Toll Free: 800-421-6511 Fax: 818-493-4433

A-3

Rev. 12/02

31-Channel Range 11.75-

216 MHz (CATV T8-T11, 2-22,

95-99)

Full 55dBmV output for optimum

carrier-to-noise performance

In-band carrier-to-noise ratio

60 dB provides superior

picture quality

Highly accurate crystal controlled

oscillator for reliable drift-free

operation

Superior vestigial sideband filter-

ing improves adjacent channel

and overall system performance

Front panel test point for easy RF

level system monitoring

IRC and HRC offset available for

frequency settings in systems

using offset channels

Auxiliary AC outlet for

convenience

UL Approved

Optional PAL format

channels available

PCM55

Channels: 31 Channels

(CAVT T8-T11, 2-22, 95-99)

FCC Docket 21006 offsets,

HRC & IRC offsets

Frequency Range: 11.75 - 216 MHz

Output Level: 45 to 55 dBmV

Output Impedance: 75 ohms

Audio/Video Ratio: Adjustable -7 to -18dB

below video carrier

Frequency Stability: ±5 kHz in aeronautical band

Conforms to FCC Docket 21006

Spurious Output: 60dB below video carrier

with A/V ratio @ -15 dB

Input Level: 1.0 V p-p min for 87.5% mod.

Input Type: Clamped video neg. sync

Visual C/N: 60 dB @ 4 MHz BW

Frequency Response: ±1.5 dB (30 Hz to 4.2 MHz)

Hum and Noise: -60 dB @ 87.5% modulation

Meets FCC group delay predistortion correction requirement for

color transmission.

Power Input: 108 to 125 VAC 60 Hz 20W

Operating Temperature: -10°C to 50°C

Dimensions: 19˝(L) x 3˝(D) x 13/4˝(H)

Weight: 3.8 lbs.

Connectors: “F” Type

Baseband Input Impedance: 600 ohms unbalanced

Baseband Input Level:

0.5 V p-p for 25 kHz peak dev.

Pre emphasis: 75 microsecond

Flatness: 1.5 dB (50 Hz to 15 kHz)

RF Video

Audio General

Product Specifications

216MHz Single Channel Crystal Controlled A/V Modulator

AUDIO VIDEO MODULATOR

PCM55 TEST

POINT R.F.

OUTPUT AUDIO

MODULATION AURAL

LEVEL ADJUST LEVEL ADJUST

VIDEO

MODULATION

-30 dB

CH-

VIDEO IN 120VAC

60Hz 10W

600W MAX

AUDIO IN

RF OUT

Front View

Rear View

Ordering Information

PCM55 – Channel

www.picomacom.com

A-4

Rev. 12/02 355 Parkside Drive San Fernando, CA 91340

Ph: 818-493-4300 Toll Free: 800-421-6511 Fax: 818-493-4433

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