2 for location of front and rear panel connectors and controls.
The ANC-4 operates from a n12VDC power source. Plug an
AC to 12VDC adapter into the ANC’s DC IN (J4) jack on the rear panel.
The unit is protected for reverse polarity, so no damage will result if the
correct polarity is not observed, but the unit will not operate. If you solder
on your own power plug, be sure to check for the correct polarity - center
terminal is positive - before connecting to the ANC-4. Use the Timewave
AC-1 or similar AC-to-DC adapter with at least 300 mA current
capacity. The power input mating connector is coaxial, 2.1mm ID and
5.0 to 5.5mm OD, center positive. A mating plug is included with the
unit. (Older JPS ANC-4 units use a 2.5 mm ID power connector).
Connect the Noise Antenna, using either the short wire antenna
(supplied
with the unit) or your own noise antenna,
to the unit.
NOTE: The noise
antenna supplied with the unit is likely to be effective only for noise
generated within the operating area or room and will not be
adequate for reducing power line or other noises generated outside
the home. See Section 3 for outside noise antenna suggestions.
The
wire antenna comes with an RCA phono plug and plugs into the phono
jack (J1) on the rear of the unit. This jack is also used to connect your
own noise antenna, if desired. The RCA phono connector provided with
the wire antenna may be used to connect your own outside noise antenna
by unsoldering the wire and connecting the coax center conductor to the
center pin of the RCA connector and the coax shield to the outside of the
RCA connector. Use the shortest length for the noise antenna that will
provide a good null with the NOISE GAIN control in its mid range.
Using a UHF connector, connect the outside antenna to the MAIN ANT
connector (J3) on the rear of the unit.
Using a UHF connector and coaxial cable, connect the unit from the
RADIO connector (J2) on the rear of the unit to the receiver or
transceiver rf input or ANTENNA connector.
Connect the rear panel ground connector to your station ground. This
will reduce the effect of hand capacitance on the settings as you null out
the local noise.
Turn on the ANC-4’s POWER switch. The yellow LED next to the
switch should be illuminated.
Set the NOISE PHASE control to the full CCW position. Set the PHASE
RANGE pushbutton in the “IN” (“A”) position. Set the FREQ RANGE
pushbutton in the “IN” (LO) position. Turn the NOISE GAIN control
fully CCW to ZERO.
Tune your receiver to a frequency in the 3 to 4 MHz band (80 Meters).
Find a spot where you hear only the noise level. If the noise is generated
locally, such as close-by power lines, computers, TV, etc., you should be
able to adjust the NOISE PHASE and NOISE GAIN controls to reduce
the noise level considerably. If the noise you receive is not generated
locally, the unit will probably have little effect on your noise level.
Turn the NOISE GAIN control slowly CW (clockwise) while observing
the receiver “S” meter. Note when the noise level changes, either
3
CONTROL SETTINGS
TUNE IN NOISE ON
THE RECEIVER
SECTION 2
QUICK
OPERATION
CONNECT POWER
CONNECT NOISE
ANTENNA
CONNECT OUTSIDE
ANTENNA
CONNECT UNIT TO
RECEIVER ANTENNA
CONNECTOR
CONNECT TO
STATION GROUND
TURN ON POWER
