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Filter Graphs

The following 18 charts show the response curves for the 18 optional filters that are available for
the NCC-1.

DXE-NCCFL-LP160M - Low Pass, 160 M and below - Cut off Frequency 2.30 MHz

DXE-NCCFL-LP80M - Low Pass, 80 M and below - Cut off Frequency 4.00 MHz

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Summary of Contents for NCC-1

Page 1: ...g Controller DXE NCC 1 DXE NCC 1 INS Rev 7b DX Engineering 2017 1200 Southeast Ave Tallmadge OH 44278 USA Phone 800 777 0703 Tech Support and International 330 572 3200 Fax 330 572 3279 E mail DXEngin...

Page 2: ...HD1 HD2 Antenna Power Enable Disable 15 HD4 Antenna Power Source 15 HD5 TX Muting 15 Installation 16 Connections 16 NCC 1 Dimensions 17 Typical Connections to a Transceiver 18 Phase Nulling with a Tr...

Page 3: ...r true unidirectional patterns is just over 1 4 wavelength although wider spacing is still very useable Two ARAH2 1P active receive horizontal antennas can be configured as horizontally polarized dipo...

Page 4: ...a single switch Front panel adjustments compensate for less than ideal installations making a directional array possible in most situations NOTE The NCC 1 is a Receive Only phasing system It is design...

Page 5: ...al antenna with a vertical antenna almost always increases fading Antenna Feedlines It is not necessary to use any special length of feedline with antennas used in this system or for antennas to be re...

Page 6: ...nna noisy The most reliable and consistent performance occurs with antenna spacing less than 1 4 wavelength when antennas are in line with the desired direction and less than 1 1 2 wavelengths apart w...

Page 7: ...ethod follows Connect one Beverage or other similar low noise receiving antenna to INPUT A Connect another Beverage or another low noise receiving array to INPUT B Connect the NCC 1 RECEIVER connector...

Page 8: ...to change or improve directional patterns Pattern changes can be used to improve signal to noise ratio even in the absence of strong noise It is possible to combine almost any type of receiving anten...

Page 9: ...er nulls to the direction of unwanted signals or noise The best system is often found by planning although it is often worth experimenting Using this type of directional phased antenna array you may r...

Page 10: ...in reduced nulls or reduced enhancement of distant signals Understanding Noise Noise limits our ability to hear a weak signal on the lower bands Noise is often an accumulation of many unwanted signals...

Page 11: ...gnal to Noise ratios For the most effective nulling of noise the antennas on both the A and B inputs must hear the same unwanted noise and should have similar polarization You may have to experiment t...

Page 12: ...in the center of the range and gain is reduced as the knob is rotated away from a particular channel If you rotate the BALANCE control clockwise the gain of INPUT A is reduced Without precise signal o...

Page 13: ...e NCC 1 requires well filtered 13 8 to 15 Vdc 1A minimum The NCC 1 should be connected to a well filtered and regulated 13 8 to 15 Vdc 2 A power source A 2 1 mm plug center positive power plug is incl...

Page 14: ...er and transmitter muting options With the unit unplugged and no power connected remove 6 screws on each side of the cover and lift it off To configure the jumpers turn the NCC 1 so the components mat...

Page 15: ...the rear panel HD4 is a three pin header located at the rear of the main circuit board near the power jacks and the two large power transistors that are bolted to the main circuit board When the jumpe...

Page 16: ...source antenna to the INPUT B F style or Phono connector Connect a standard shielded audio style cable between the T R Control Phono connector and an external transmit control source o By default the...

Page 17: ...mm center positive jack if you are not using the NCC 1 supply to power antennas HD4 Jumper Selectable The allowable voltage range is 13 8 to 30 Vdc well filtered fused with 300 mA maximum load curren...

Page 18: ...o a typical Transceiver with Receive Input Antenna Inputs A and B may be connected to any receive antennas as discussed in the Introduction and in the following pages Power is supplied to the Active R...

Page 19: ...nulling out undesired signals because receive only antennas will not hear the desired signal Many of the low noise advantages of the NCC 1 will be hidden by strong ambient noise if a transmit antenna...

Page 20: ...20 Phase Nulling with a Transmit Antenna and a single Active Receive Antenna...

Page 21: ...21 Figure 4 DXE NCC 1 Receive Antenna Variable Phasing Controller with two Active Receive Antennas using high power to the transmit antenna...

Page 22: ...22 Figure 5 DXE NCC 1 Receive Antenna Variable Phasing Controller with one Active Receive Antenna...

Page 23: ...hallow until levels are balanced Adjust the BALANCE control to further reduce noise or interference It may be necessary to go back and forth between PHASE and BALANCE controls a few times If the BALAN...

Page 24: ...e inversion in INPUT B This switch has the effect of changing a peak to a null or a null to a peak If a signal is nulled with the NORM REV switch in one position changing the position will result in a...

Page 25: ...mirrored bridges in each channel When phase delay is increased in one channel phase delay is simultaneously decreased in the other channel Any level changes while adjusting phase are automatically com...

Page 26: ...r operation is desired Figure A1 shows the correct method of protecting DX Engineering Active Receive Antennas from transmit energy using the optional DXE TVSU 1A Time Variable Sequence Unit The optio...

Page 27: ...27...

Page 28: ...ve fused power source of up to 30 Vdc would be connected to the ANT PWR jack on the rear of the NCC 1 TX mute connection to the T R CTRL will interrupt this power feed If relays or pre amplifiers are...

Page 29: ...ed Noise quiet FET followers and exceptional feedline shield isolation Long Life high quality stainless and brass mounting hardware metal enclosure Compact stainless steel tapered element has low visu...

Page 30: ...al cable Flooded style cables have the distinct advantage of automatically sealing small accidental cuts or lacerations of the jacket Flooding also prevents shield contamination and can be direct buri...

Page 31: ...n on hang delay of PTT amplifier hang delay external antenna relay hang delay and turn on delay of auxiliary output Dip switch settable delays of 0 30 milliseconds in 2 millisecond steps Side tone gen...

Page 32: ...y reducing or excluding frequency specific interfering noise and signals the noise floor of the desired pass band can be lowered for dramatically improved reception You can install one set or two sets...

Page 33: ...18 charts show the response curves for the 18 optional filters that are available for the NCC 1 DXE NCCFL LP160M Low Pass 160 M and below Cut off Frequency 2 30 MHz DXE NCCFL LP80M Low Pass 80 M and b...

Page 34: ...34 DXE NCCFL LP40M Low Pass 40 M and below Cut off Frequency 7 50 MHz DXE NCCFL LP20M Low Pass 20 M and below Cut off Frequency 15 00 MHz...

Page 35: ...35 DXE NCCFL LP15M Low Pass 15 M and below Cut off Frequency 22 00 MHz DXE NCCFL LP10M Low Pass 10 M and below Cut off Frequency 30 00 MHz...

Page 36: ...36 DXE NCCFL HP160M High Pass 160 M and above Cut off Frequency 1 65 MHz DXE NCCFL HP80M High Pass 80 M and above Cut off Frequency 3 40 MHz...

Page 37: ...37 DXE NCCFL HP40M High Pass 40 M and above Cut off Frequency 6 60 MHz DXE NCCFL HP20M High Pass 20 M and above Cut off Frequency 13 70 MHz...

Page 38: ...38 DXE NCCFL HP15M High Pass 15 M and above Cut off Frequency 20 20 MHz DXE NCCFL HP10M High Pass 10 M and above Cut off Frequency 27 90 MHz...

Page 39: ...39 DXE NCCFLBPF160M Band Pass 160 M only Center Frequency 1 85 MHz DXE NCCFL BPF80M Band Pass 80 M only Center Frequency 3 70 MHz...

Page 40: ...40 DXE NCCFL BPF40M Band Pass 40 M only Center Frequency 7 15 MHz DXE NCCFL BPF20M Band Pass 20 M only Center Frequency 14 15 MHz...

Page 41: ...41 DXE NCCFL BPF15M Band Pass 15 M only Center Frequency 21 15 MHz DXE NCCFL BPF10M Band Pass 10 M only Center Frequency 28 50 MHz...

Page 42: ...hey perform in your unique set up Using a Phillips Head Screwdriver remove NCC 1 cover Locate and remove four jumpers as shown Slightly bend C101 and C32 to allow the included plastic spacer to sit on...

Page 43: ...d below 22 00 MHz DXE NCCFL LP10M 2 Filters Receive Only Low Pass 10 M and below 30 00 MHz DXE NCCFL HP160M 2 Filters Receive Only High Pass 160 M and above 1 65 MHz DXE NCCFL HP80M 2 Filters Receive...

Page 44: ...allation damaged from severe weather including floods or abnormal environmental conditions such as prolonged exposure to corrosives or power surges or by the performance of repairs or alterations outs...

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