The Contemporary Research QCA9-33, is an active RF combiner that features eight high-level inputs and one low-level input, combining with high isolation and amplifying up to a 33 dBmV output level.

Designed for QMOD HDTV applications, the eight RF inputs typically receive 29 dBmV RF from QMOD HDTV modulators. The ninth input is for up to 19 dBmV RF signals, such as incoming cable feed, a control channel from an ICE-HE Head End control modulator, or another QMOD or QCA9-33. Up to 8 QCA9-33 combiners can feed a single combiner to deliver up to 76 channels.

The extremely low-noise, wideband 860 MHz amplifier compensates for combining losses and adds 3 dB of gain, typically supplying a total output of up to 33 dBmV. Employing new RF technology, the QCA9-33 delivers higher isolation, quality, and noise performance over analog-era components; the noise factor is a very low 1.8, four or more times less than other active combiners.

The compact QCA9-33 mounts two-across in a single rack space using the included RKU or optional RK1 and RK2EZ rack kits, and can be mixed with QMOD HDTV modulators using the same rack kits. The units are wholly designed and manufactured in the USA.

• Combines 8 high-level channels (QMOD 29 dBmV) and one low level input (Cable, ICE-HE at 10-18 dBmV), cascade multiple QCA9-33 units for up to 72 channels in one array
• Amplifies with a 3 dB net gain, up to maximum 33 dBmV output level
• Provides high-isolation combining
• Operates with an extremely low noise figure of 1.8, low power of less than 2W

• Size: 8.5” [216mm] wide x 1.75” [44mm] height (1RU) x 6.0” [153mm] deep
• Weight: 1.1 lbs [500g]
• Enclosure: Durable metal enclosure, rack mountable.
  • Tip: mounting adjacent to CR dual-channel QMODs can blocks air flow

• 8 Input F Connectors
• 1 Low-level Input F connector
• 1 Amp Out F connector
• Power LED
• Power: 2.1mm coaxial jack (inside center conductor positive), 170 mA maximum, 11.5 to 15 VDC, 12 VDC typical (may be unregulated)

• 8 High-level Inputs - Max input 30 dBmV
• 1 Low-level Input - Max input 19 dBmV
• Isolation: 38 dB typical, 30 dB minimum, 54 - 860 MHz
• Input Return Loss: 30 dB typical

• 17 dBmV amplifier, extremely low noise, linear performance through 860 MHz
• Net Level: + 3 db gain after combining
• Maximum level: +33 dBmV
• Composite Triple Beat -75 dBc, 132 channels at +30 dBmV per channel
• Noise Figure 1.8 typical
• Output Return Loss: 20 dB typical

• 5400-001, PS12-500 Power Supply
• 5008-025, Universal Rack Mount Kit