Comtech EF Data DT-4500-A Series - Manual (Page 53)

DT-4500-A Series Downconverters Revision 1
Rear Panel Connectors MN-DT4500A
3–3
3.2.1.2 Optional DC Power Connection
A standard 2-circuit terminal block, on/off switch, and fuse holder
supply the optional Direct Current (DC) power to the DT-4500-A.
Note the following:
DC Power Specifications
Input Power 75W maximum, less than 65W typical
Input Voltage 36 to 72 VDC
Connector Type 2-circuit Terminal Block
Fuse Protection Use (2) 3.15A 20mm slow-blow fuses.
3.2.1.3 J2A | REF IN, External Reference Input Connector (BNC-F)
The J2A | REF IN (External Reference Input) connector is a ‘BNC’ female connector
that supplies a master reference to the entire chassis. The user-supplied input signal is
used for phase-locking the internal 10MHz reference oscillator to a user-provided 5 or
10 MHz station clock. The impedance is matched for 50/75Ω, and requires an input
level of 0 ±5 dBm.
3.2.1.4 J2B | REF OUT, External Reference Output Connector (BNC-F)
The optional J2B | REF OUT (External Reference Output) connector is a ‘BNC’ female
connector that provides a 10 MHz reference for customer use. The impedance is
matched for 50/75Ω, and provides an output level of 5 ±3 dBm.
For continued operator safety, always replace the fuses with the correct type
and rating.