Filter
Top Products
4
CONTACT US TOLL FREE 800-421-6511
www.picomacom.com
PICO MACOM
DESCRIPTIONS
DESCRIPTIONS
• Five year warranty*
• Supports HRC, IRC frequency offsets
• Factory aligned to FCC Docket 21006 for
frequency offsets and stability
• Professional picture quality
• Front panel -30 dB test point
• Rear panel AC convenience outlet
can be changed by resetting the DIP switches accessed
through the front panel. High quality external modu-
lation and RF level controls assure years of reliable
operation. The modulator is shipped with all internal
adjustments pre-set, and FCC Docket 21006 off-
sets are standard at no extra cost. Pico Macom Inc.
backs the product with a five year limited warranty. *
Audio
Baseband Input Impedance: 600 ohms unbalanced
Baseband Input Level: 0.5 Vp-p for 25 kHz deviation
Pre-Emphasis: 75 microseconds
Flatness: 1.5 dB max. 50 Hz to 15 KHz
General
Power Input: 117 VAC, 60 Hz or 220 VAC, 60 Hz
Operating Temperature: -10° C to +50°
Dimensions: 19” L x 12” D x 1.75” H
Weight: 8.2 pounds
Connectors:
All “F” type
(Specifications subject to change without notice)
Specifications
Features
• Double heterodyne conversion provides
superior spurious harmonic output supression
• Channels T7 through 78 capable (5.75 to
550MHz)
• 57 ±3 dB output, 5.75 to 550 MHz
• SAW filtered and I.F. loop
Description
The PFAM-550SUB is a frequency agile double hetero-
dyne conversion audio/video modulator. Its superior
sideband filtering provides adjacent channel compat-
ibility and FCC Docket 21006 frequency accuracy. The
PFAM-550SUB provides 57 ±3 dB output from sub-
band channel T7 through cable channel 78 including
HRC and IRC off-set frequencies. The channelization
Specifications
RF
Channels: 89 channels (T7-T13, 2-78 & 95-99)
Output Level: 45 to 57 dBmV, adjustable from front panel
Output Impedance: 75 ohm
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:
(In-band) CATV channels: -60dBc, A/V ratio @ 15dB
(In-band) Sub-band -57 dBc, A/V ratio @ 15dB
(Out-of Band) F≤550MHz -54 dBc, A/V ratio @ 15dB
C/N (In Band): >58 dB
C/N (Out-of-Band): >68 dB
Fv+6.5 MHz (Upper Adj. Reject): >60 dBc
Fv-1.5 MHz (Lower Adj. Reject): >60 dBc
I.F. Frequency: 45.75 MHz
Video
Input Level: 0.6 V p-p min for 87.5% modulation
Input Type: Composite video negative sync
Frequency Response: ±0.8 dB 30 Hz to 4 MHz
Differential Gain: <3% (10 to 90% APL)
Differential Phase: <2° (10 to 90% APL)
Chrominance Luminance Delay: <50 nsec
Hum and Noise: -60 dB @ 87.5 modulation
Video Signal to Noise: -60 dB minimum (weighted)
Input Level Range: 0.5 V to 1.5 V P-P
* One year warranty if sold outside U.S.A.