FDU-240

24 Output Frequency Distribution Amplifier

The Brandywine Communications Model FDU-240 is a 2 input and 24 output frequency distribution amplifier that offers modern, often requested and reliable features. The base unit outputs twenty-four sine waves that are input directly from the rear panel to the transfer switch. For enhanced phase noise performance an optional clean up oscillator is positioned between the rear panel inputs and the inputs of the transfer switch. A clean up oscillator may be installed between both Input A and Input B inputs or only on Input A.

Variations

Model Number	Description	Oscillator Type	Power Supply	Form Factor	Power Type	Output Format	No. of Outputs	Input Format	No. of Inputs
FDU-240	Multi-Channel Frequency Distribution Unit	OCXO	Single AC	1U	AC	10 MHz	24	10 MHz	2
FDU-240-PLL	24 Channel Frequency Distribution Unit with PLL	OCXO PLL	Single AC	1U	AC	10 MHz	24	10 MHz	2
FDU-240-2PLL	24 Channel Frequency Distribution Unit with 2 PLL	OCXO 2PLL	Single AC	1U	AC	10 MHz	24	10 MHz	2
FDU-240-5M	Multi-Channel Frequency Distribution Unit 5 MHz	OCXO PLL	Single AC	1U	AC	5 MHz	24	5 MHz	2
FDU-240-2PLL-5M	24 Channel Frequency Distribution Unit with 2 PLL 5 MHz	OCXO 2PLL	Single AC	1U	AC	5 MHz	24	5 MHz	2
FDU-240-5M-10M	24 Channel Frequency Distribution Unit 5 MHz in, 10 MHz Out	OCXO	Single AC	1U	AC	10 MHz	24	5 MHz	2

Features

5 MHz or 10 MHz Outputs Available
Reference Frequency Input Option
Auto Changeover with Ref. Input Option
Low Phase Noise Outputs
Twenty four Outputs
Front Panel Status Indicators
Fault Discrete Inputs
Compact 1U, 19” rack mount

Specifications

Reference Frequency Inputs

Connector Type	Two rear panel BNC's
Input Amplitude	0.5Vrms – 1Vrms
Input Impedance	50 Ohms
Frequency	10 MHz

Fault Inputs

Number of Inputs	2
Connector Type	DB9
Levels	TTL
Active Level	Link selectable, high or low

Sine Wave Outputs

Number of Outputs	24
Connector Type	BNC
Frequency	Same as input
Output Level	+13 dBm, ± 2 dBm into 50 Ohms

SSB Phase Noise (with clean-up oscillator option)

Offset	dBc/Hz
1 Hz	-60
10 Hz	-110
100 Hz	-140
1 kHz	-150
10 kHz	-155
Harmonics	30 dBc
Spurious	-80 dBc

Aging

Without Cleanup Option	Same as input
With Cleanup Option	5E-7 per year

Power

Power	115/230 Vac 50/50 Hz
Power Consumption	<25 W

Environmental

Temperature
Operating	0 to +50°C
Storage	-40 to +85°C
EMC Emmission	To EN50081-1 as EN55022
EMC Immunity	To EN50082-1 as EN1000-4-2 ESD, IEC 801-3 HF Field, IEC 801-4 Burst
Humidity	To 95% non-condensing

Physical

Dimensions	19 inch Rack Mount, 1.73 inches high (1U), 14.5 inches deep
Weight	7.5 lb typical

FDU-240

24 Output Frequency Distribution Amplifier

Variations

Features