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NCC-1 Rear Panel Connections
INPUT A
: Primary Receive Antenna – Phono and F style connector. Phono and F style
connectors are used to prevent accidental connections to transmitting equipment.
INPUT B
: Secondary Receive Antenna – Phono and F style connector. Phono and F style
connectors are used to prevent accidental connections to transmitting equipment.
The NCC-1 can supply T/R Controlled DC power to active antennas through the INPUT A
and B coaxial lines.
DC power can come from either the
NCC-1
supply or through a separate
rear panel power connector. The
NCC-1
has an internal high-speed solid-state switch that will
switch up to 30 Volts DC Positive voltage at 150 mA per input channel for powering receive
antennas.
RX OUT
: Receive Signal output to receiver – Phono and Type F connector. These types of
connections work well with most transceiver and receiver RX ANT Inputs.
Main Power:
The
NCC-1
requires well-fi12 to 15 Vdc @ 1A minimum
The NCC-1 should be connected to a well filtered and regulated 12 to 15 Vdc @ 2 A power
source.
While station power is highly recommended, a well-regulated, low-noise external wall
transformer can be used. A 2.1 mm plug, center positive power plug is proved with the
NCC-1
.
External high current sources, such as station power supplies, should be appropriately fused at
the power source. The use of switching power supplies is discouraged due to the presence of
noise in their output.
ANT PWR:
Supplies external voltage to INPUT
A
and INPUT
B
feedlines to power the active
antennas. Allowable voltage range is 12-30 Vdc with 300 mA maximum load current for both
INPUTs combined. A 2.1 mm plug, center positive power plug is proved with the
NCC-1
.
T/R CTRL:
Activated by pulling to ground or by external application of voltage (internal
jumper selectable). When activated INPUT A is bypassed directly to receiver and INPUT B
disconnects. Activation also removes antenna power from both INPUTs – Phono connector
The T/R CTRL line can be configured to disable the
NCC-1
and remove power from antennas
attached to the
NCC-1
when pulled either low or high. The normal switching threshold voltage is
