
UT-4500-A Series Upconverters Revision 1
Rear Panel Connectors MN-UT4500A
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 UT-4500-A.
Note the following:
Input Power 75W maximum, less than 65W typical
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
used to supply 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.
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