Spruce Creek Microwave
HF Digital Preselector for Software Defined Radios
Tuning range: 1.8MHZ TO 30MHZ
Four Selectable 1.8-4MHZ, 4-10MHZ ,8-16mhz
3 DB Band-width: 5% nominal or
Insertion Loss: 4 DB Max.
Return loss: 10DB Max ref 50 Ohms.
IP3: +30 Min.
Control interface: RS 232
Tuning Steps: 10KHZ.
Tuning Speed: 250us Max.
Transient response: Less than 1microvolt.
Built in HP filter for transient suppression.
Power: +5 VDC @ 750MA.
Connectors RF: SMA Female.
Control connectors: Standard 9 pin D
The Digital Preselector Filter is a tunable preselector filter
used to enhance receiver performance by reducing large
interfering signals that cause distortion. The preleselector
can be used in a variety of applications including software
defined radios (SDR), conventional receivers, and remote
The Digital Preselector Filter contains a controller/power
supply and as many as four filter modules. Each module
supports 255 unique frequency settings. Each module is
calibrated to provide a tuning range with the least amount
of ripple across the band. When a new frequency is
requested, the controller selects the band and tuning
combination that tunes the filter to be centered as close as
possible to that frequency. A new frequency is requested
by sending an ASCII command via RS-232 or USB.
A complete description of the communications protocol can
|2733 Spruce Creek BLVD
Port Orange, FL
- Built in Power Supply.
- RS-232 Interface.
- No Programing from external host.
- Modular design for additional Frequency bands HF to UHF
- 2 pole Chebyshev Low Ripple Frequency Response
- Continuous Sweep and Hop ability.
- Band-width from 2% to 10% available
BAND # 1 SELECTED