Pico Macom PCM55 User manual

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
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: [phone]
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: [phone]
Specifications Subject to Change © Copyright 2003 Pico Macom, Inc.