The TDU-310 is a high performance time signal distribution amplifier designed to distribute the precise time and time interval (PTTI) time signals generated by military GPS receivers compliant with ICD-GPS-060.


The TDU-310 provides 10 output channels of each of three signals – 1PPS, Have Quick and 50 bit/sec BCD time code. Two independent input references are supported, with fault monitoring and switchover to the secondary reference if the primary source fails. Manual override of source selection is possible via a front panel mounted switch.

The 1PPS output pulse width is set to 20 microseconds, independent of the input pulse width with rise times of less than 20ns in the ICD-GPS-060 mode. The 1PPS outputs are individually selectable for either a low source impedance drive into a 50 ohm load for a 10 V PPS or 50 ohm source impedance for a 5 V PPS.

BCD time code outputs are available with either RS232 (single ended) or RS422 (differential)

output buffers. The TDU-310 is configured as a 1 U 19” rack mount unit. Power supply options include 115/230 VAC, 48, 24 or 12 VDC.

The TDU-310 is designed to provide dual redundant timing signals for use in telecommunications, power utilities, and military communication applications.


Product Specifications
Product Data Sheet
User Manual

No. of Outputs 10
Isolation Independently buffered
Amplitude 10V0-Peak into 50 Ohm or 5V0-Peak into 50 Ohm load
Output Protection Short Circuit Proof
Rise Time <20ns
Delay <60ns, <100ns with opto-isolator
Jitter <2ns
Connector BNC
Have Quick Time Code  
No. of Outputs 10
Isolation Independently buffered
Amplitude 5V0-Peak
Output Protection Short Circuit Proof
Output Impedance Optional 50 Ohm
Rise Time <20ns
Connector BNC
BCD Time Code  
No of Outputs 10
Isolation Independently Buffered
Amplitude RS232 compatible - standard
Mark +6 +/- 2 V
Space -6 +/- 2V
Amplitude RS232 compatible - optional
Output Protection Short circuit proof
Propagation Delay <2 microseconds
Connector DB25F
Inputs Signals 1PPS, BNC, Have Quick Time Code in accordance with ICD-GPS-060
No. of Input References 2
Connector BNC
Environmental/ Physical  
Temperature Instrument -10 t0 +50°C
Humidity 95% non condensing
Power 110/230VAC
Optional 19" rack mount
Dimensions 19" W x 1.73" (1U) H x 10" D
Weight 11lb typical

alt TDU-310 Data Sheet

alt TDU-310 User Manual




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Brandywine Communications
Ultra-Precision Time & Frequency

1153 Warner Ave
Tustin, CA 92780
Phone: +1 (714) 755-1050