Technical bulletins

References for the RF industry

Technical sheets

"How-tos" on Shively products

• "Shively Labs Meets the Very Windy Mountain"
  from May-June 2008 Radio Guide
• "Shively Labs: Antennas That Work!"
  from September 2007 Radio Guide [279 kB]
• "Shively 6014 Dual Hybrid Antenna Solves a Dilemma"
  from September 2007 Radio Guide [232 kB]
• Vermont Public Radio's Mt. Mansfield Project (October '06)
• West Virginia Public Radio chooses BE, Shively (reprinted from Radio Currents, 6/5/06)
• Interdigital combining technology at 4 Times Square (July '05)
• 4 Times Square, NY: 21-station master FM project (April '04)
• Revolutionary IBOC test at Cougar Mountain (August '02)

Model 2940-N/1

Low-Power Balanced Combiner Module

Performance Specifications:
Type:		Resonant Cavity
Size:		3"
No. of Cavities per Filter:		3	4
Typical VSWR	at ± 100 kHz:	1.04:1
	at ± 150 kHz:	1.04:1
	at ± 200 kHz:	1.08:1
Typical Insertion Loss:		-1.15 dB	-2.30 dB
Typical Frequency Response (deviation from center frequency)	at ± 100 kHz:	-0.01 dB
	at ± 150 kHz:	-0.02 dB
	at ± 200 kHz:	-0.05 dB
Typical Group Delay (deviation from center frequency)	at ± 100 kHz:	30 nsec
	at ± 150 kHz:	50 nsec
	at ± 200 kHz:	150 nsec
Typical Bandwidth:		200 kHz
Maximum Filter Input Power:		1,000 W (1.0 kW)
Maximum Power Through Output Hybrid:	Average:	2,500 W (2.5 kW)
	Peak:	40 kW
Inputs & Outputs:
Input Connection:		Type "N"
Input Hybrid:		Type "N"
Output Connection:		7-16 DIN
Output Hybrid:		7-16 DIN
Cooling:		Convection

	Printer-friendly Adobe Acrobat version
	Get Acrobat Reader (free download)