Pico Macom PFAM550 Manuale utente

PICO MACOM, INC.

PFAM550

82-Channel frequency range

54-550 MHz (CATV 2-78, 95-99)

DIP switch controlled phase-

locked loop for solid drift-free

output on any channel

SAW filtered for superior adjacent

channel performance enables

drop-in channel expansion

57dBmV output for optimum

carrier-to-noise performance

Carrier-to-noise ratio >60dB

provides superior picture quality

Front panel test point for easy RF

level system monitoring

Composite audio-video IF loop

provides compatibility with

encoders, ghost cancellers, and

video-override applications

IRC and HRC offset available for

frequency settings in systems

using offset channels

Double heterodyne conversion

provides superior spurious

harmonic output suppression

UL Approved

The PFAM550 is a professional re-broadcast grade frequency agile double

heterodyne conversion audio/video modulator. Its SAW filter provides superior

sideband filtering, adjacent channel compatibility and spurious free output.

The PFAM550 provides 57±2 dBmV output over 82 channels from CATV

channel 2 to 78 accommodating HRC and IRC offset frequencies. The unit

features a composite audio-video IF loop, which provides compatibility with

encoders, ghost cancellers, and video-override applications. Front panel

DIP-switch controlled phase-locked-loop (PLL) allows easy channel selection

and drift-free channel stability. High quality modulation and RF level control

potentiometers assure years of reliable operation. The modulator is shipped

with all internal adjustments pre set, and FCC Docket 21006 offsets are

standard. Pico Macom backs up this product with its industry leading 5-year

limited warranty.

PFAM550

550MHz Agile 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-19

Rev. 12/02

PFAM550

Video Channels: 82 channels (2-78 & 95-99)

Frequency Range: 54-550 MHz

Output Level: 45 to 57 dBmV, ± 2 dBmV

(adjustable from front panel)

Output Impedance: 75 ohms

Output Return Loss: -15 dB

Audio/Video Ratio: Adjustable -7 to -22 dB

below visual carrier

Frequency Stability: ±5 kHz in aeronautical band

Conforms to FCC Docket

21006

Spurious Output: -60 dB below video carrier

with A/V ratio @ -15 dB

C/N (In-band): >57 dB

C/N (Out-of-Band): >68 dB

Fv+6 MHz (Upper Adj. Reject): >60 dBc

Fv-1.5 MHz (Lower Adj. Reject):>60 dBc

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

Input Type: Clamped video neg. sync

Video S/N: -60 dB minimum (weighted)

Input Level Range: 0.5 V to 1.5 V p-p

Frequency Response: ±0.8 dB 30 Hz to 4.2 MHz

Differential Gain: <5% (10 to 90% APL)

Differential Phase: <5° (10 to 90% APL)

Chrominance luminance delay: *See note below

Hum and Noise: -60 dB @ 87.5 modulation

*NOTE:Meets FCC group delay predistortion requirements for

color transmission.

Power Input: 95 to 130 VAC, 60 Hz or

210-250 VAC, 50 Hz

Operating Temperature: -10° C to + 50° C

Dimensions: 19˝(L) x 9 3/8˝(D) x 13/4˝(H)

Weight: 3.8 lbs.

Connectors: All “F” type

Baseband Input Impedance: 600 ohms unbalanced

Baseband Input Level:

0.5 V p-p for 25 kHz peak dev.

Pre-emphasis: 75 microseconds

Flatness: 1.5 dB max. 50 Hz to 15 kHz

RF Video

Audio General

Product Specifications

550MHz Agile A/V Modulator

AGILE AUDIO VIDEO MODULATOR

PFAM 550

CATV SERIES

POWER

VIDEO

AUDIO

RATIO

AUDIO

OVER

MOD.

AUDIO

MOD.

ADJ.

VIDEO

MOD.

ADJ.

VIDEO

OVER

MOD.

CHANNEL SELECT

OUTPUT

LEVEL

TEST POINT

-30dB

RF OUT

IF IN IF OUT VIDEO IN AUDIO IN

AC117V

60Hz/35W

600W MAX

125VAC

0.5A

CAUTION:

FOR CONTINUED PROTECTION AGAINST FIRE

HAZARD, REPLACE ONLY WITH SAME TYPE 0.5A 125V FUSE

FUSE

Front View

Rear View

Ordering Information

PFAM550

www.picomacom.com

A-20

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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