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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. (See Appendix A for special instructions for remotely powered receive antenna
systems that require 15 to 30 Vdc)
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-fi13.8 to +15 Vdc @ 1A minimum.
The NCC-
1 should be connected to a well filtered and reg13.8 to +15 Vdc @ 2 A power
source.
A 2.1 mm plug, center positive power plug is included with the
NCC-1
.
External high
current and well filtered 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:
– 2.1 mm jack. Supplies external voltage to INPUT
A
and INPUT
B
feedlines to
power active antennas or other devices. Allowable voltage range is +13.8 to +30 Vdc with 300
mA maximum load current, well filtered & fused for both INPUTs combined. A 2.1 mm plug,
center positive power plug is included with the
NCC-1
.
T/R CTRL:
– Phono connector. 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.
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
