Specifications

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Section 1: Headend Equipment
Headend Amplifiers
[phone]
1 - 4
QRAM200
Technology Push-Pull Pwe Dbl Quadra Feedfwd Pwr Dbl Quadra GaAs Qudra GaAs
Gains Available (dB) 21, 31, 35, 38 27, 31, 35 27, 31, 35 (18,22), 33 29, 33 (17), 27, 31 30, 33 23, 27, 31 30, 33
QRAM550 QRAM750 QRAM870
Quality Rack Amplifier Module
Ordering Information
QRAM 750 - 30 CGP
1 2 3 4
1: Amplifier Model
2: Bandwidth
870 = 870 MHz
750 = 750 MHz
550 = 550 MHz
200 = 200 MHz
3: Gain (See below)
4: Output technology
Blank = Push-pull
P = Power Double
Q = Quadra Power
F = Feedforward
CGP= Cascaded Gallium Arsenide (GaAs) PD
Options:
• QRAM870-2S ................ Two way splitter, 870 MHz
• QRAM870-4S ................ Four way splitter, 870 MHz
• QRAM870-20TP ............ -20 test point, rear output port #3
(Only ONE of the above options may be used.)
• QRAM870-40/54-DF ..... Diplex filter, 5 MHz to 40 MHz.
• QRAM870-62/85-DF ..... Diplex filter, 5 MHz to 62 MHz.
• QRAM-RFI-OPTION ..... Front cover RFI gasket
• QLX750-xx ..................... 750 or 860 MHz equalizers,
0 dB through 24 dB, 2 dB steps.
(Used in QRAM750)
• QEE(freq), dB ................ 450 MHz — 6, 12, 18, 24 dB 550 MHz,
3 dB Steps, 0 to 24 dB (Used in QRAM750)
• SXP-TY-**. ..................... Plug-in pad, 0 - 20 dB, 1 dB steps
• SXP-** ........................... Pad used in 750 MHz splitters.
• #951 ............................... 120 volts to 26 volts, 60 Hz AC power transformer,
50 VA rating (Order for spares)
Headend Amplifier
The DC-300 series consists of three headend amplifiers and two power supplies housed in a single one rack unit
high chassis. There are several models of amplifiers for both forward and reverse applications. Each chassis has two
power supplies in hot standby mode. If one supply should fail, the load will be transferred automatically to the second-
ary unit without service disruption.
As with all our amplifiers, the DC-300 is designed to be service friendly by incorporating hot, swappable, and easy to
remove modules. In addition, plug in pads and equalizers can be utilized for balancing individual lasers. Remote status
monitoring is available through a DB-15 connector on the rear of the chassis. Each chassis houses three amplifiers
and two power supplies.
• Hot standby redundant power supply
• Compact - only one rack unit high
• Remote monitoring
• Failure alarm monitoring of amplifiers and power
supplies through LED on front panel
• Service friendly through hot swappable modules
• Flat frequency response ±0.5 dB
• High performance RF specifications
• System balancing using plug-in pads and
equalizers
Model FDA-19-870 FDA-24-870 FDA-27-870 RDA-27-65
Bandwidth, MHz 54-870 54-870 54-870 5-65
Gain, dB(min) @870 MHz 19.5 24 27 27
Input-Output Ports F female F female F female F female
Dim (inches)
Weight
AC Input Power
Optional Power Input
1.75 x 19W x 17.25D
10 lb
110/ VAC / 60 Hz, 16 W
-48 VDC
• QRAM 550 & 750/870 MHz Amplifiers
o Plug-in output diplex filter
• QRAM 200 MHz Headend Amplifier
• Variable gain & tilt controls
• Plug-in Splitters & Dir. Coupler T.P.
• U.L. Transformer & DC Powering