PICO MACOM INC.
12500 Foothill Blvd. • Lakeview Terrace, CA 91342 • (818) 897-0028 • (800) 421-6511 • FAX (818) 834-7197
D E S C R I P T I O N S
3
Description and Specifications
Features
• All Band Design: VHF (2-13),
Midband (A-I), Superband (J-W)
• Excellent audio and video linearity
• Separate modulation and RF level controls
• 110 VAC version UL and CSA Listed
• Power On Front Panel Indicator
Specifications
RF
Output Channels
....... 2-36, STD, IRC, HRC and
FCC docket 21006 offsets
Frequency Range
............................ 54-300 MHz
Output Level
..................................... + 55 dBmv
Output Adjustment Range
........................ 12 dB
Spurious Output
....... -60 dB @ 55 dBmv output
(A/V carrier -15 dB)
Sideband Filter Response @ 87% Modulation
Frequency
Low Mid & High Superband
MHz
Band Band J - W
Fv -4.5
-60dB
-60dB
-55dB
Fv -3.0
-45dB
-40dB
-30dB
Fv -1.5
-40dB
-40dB
-20dB
Fs +1.0
-45dB
-40dB
-25dB
Fs +3.0
-45dB
-40dB
-28dB
Fs +4.5
-60dB
-60dB
-55dB
Frequency Stability
...............................
±
10kHz,
±
5 kHz Aeronautical
(conforms to FCC requirements)
Offsets Pre-set
................. +12.5 kHz or +25 kHz
on FCC specified channels
(Special Offsets Available)
Audio/Video Ratio
...................... -7 dB to -18 dB
(preset @ -15 dB)
Video
Input Level
........ 0.5 V p-p minimum for 87.5%
modulation
Input Type
........ Composite Video, negative sync.
Visual C/N
.......................... 58 dB @ 4 MHz BW
Hum and Noise
........ -55 dB @ 87.5% modulation
Frequency Response
....
±
1.5 dB 30 Hz to 4 MHz
Differential Gain
............................... less than 5%
Differential Phase
............................... less than 5
°
Group Delay
.. 75 nsec (conforms to FCC require-
ments)
Audio
Input Impedance
................ 600 ohms unbalanced
Baseband input
..... 0.5 Vp-p for 25 kHz deviation
Pre-emphasis
.............................. 75 microseconds
Flatness
.................... 1.5 dB max 50 Hz to 15 kHz
Frequency Response
................... 15 Hz to 15 kHz
Subcarrier Frequency
.......... +4.5 MHz
±
10 kHz
General
AC Power
........................ 108 to 125 VAC, 60 Hz
220VAC, 60 Hz
Weight
.................................................. 2.5 Pounds
Dimensions
......................... 19"W x 1.75"H x 3"D
Operating Temperature
........ 0 to 50 Degrees C
The Pico Macom Inc. PCM55 modulator
provides a modulated visual and aural RF carrier
output on any single lowband, midband, or
superband channel.An improved manufacturing
process and high quality components assure years
of trouble free operation. Multi-section LC
filtering has been added to make the unit adjacent
Specifications subject to change without notice
channel compatible. This unit supplies high quality
video, color, and sound signals on any unused
channel within a closed circuit MATV or SMATV
system. The modulator is shipped with all internal
adjustments preset and is provided with separate
external modulation and RF level controls.
