DXE-NCCFL Receive Filter Sets The advanced plug-in filter modules (DXE-NCCFL Series) offer frequency-specific receive system enhancements for the DXE- NCC-1 Receive Antenna Phasing Controller. All filter sets are available in matched pairs of low-pass, band-pass and high-pass frequency ranges. Filter cut-off and center frequencies correspond to the major Amateur bands, 160, 80, 40, 20, 15 and 10 meters, with an insertion loss of only about 1 db. Operation By default, empty NCC-1 filter slots have jumpers to pass all signals. On the NCC-1 front panel, the BAND toggle switch "L" or "H" positions activate one of two filter sets, allowing over 360 degrees of phase rotation in two frequency ranges. The BAND switch L position covers from 850 khz to 8 MHz. The BAND switch H position covers from 2 MHz to 15 MHz. Frequencies outside these ranges will have less than 360 degrees of phase rotation. NCC-1 Receive Filters must be placed into the proper BAND filter slots corresponding to desired usage. NCC-1 Receive Filters are installed in pairs (2 of the same type), so both NCC-1 receive antenna inputs "A" and "B" have the same pass-band characteristics. Band-pass, high-pass or low-pass filters are available for users to choose and install into their NCC-1 for their specific application needs. By 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 depending on your desired filtering. NCC-1 "L" and "H" slots may be populated with pairs of band-pass, high-pass or low-pass filters to suit the specific signal rejection needs of the discerning operator. Example 80 meters L bandpass and 20 meters H highpass As an example, an 80 meter DX enthusiast may elect to install two 80 meter band pass NCC-1 Receive Filters, part number DXE-NCCFL-BPF80M, into their NCC-1 "L" BAND slots. This would dedicate their NCC-1 to 80 meter-only operations. Setting the BAND switch to L would dramatically reduce noise and signals from outside the 80 meter band, very effectively excluding interference from nearby AM Broadcast, 160 and 40 meter stations. A much lower noise floor on 80 meters could be achieved for dramatically enhanced reception of weak 80 meter DX signals. An additional pair of filters could be installed into the "H" BAND slots, to enhance reception on the higher HF bands. For example, installing 20 meter high pass filters, part number DXE-NCCFL-HP20M, and switching to BAND H would drastically reduce all received noise and signals from frequencies below 13.70 MHz. With advanced planning of additional filter availability, an NCC-1 owner could even swap different filter sets for optimal operations in different contests or band pursuits. - 1 -
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 - 2 -
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 - 3 -
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 - 4 -
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 - 5 -
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 - 6 -
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 - 7 -
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 - 8 -
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 - 9 -
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 - 10 -
Installation In this example, two sets of filters will be installed. Pairs of the lower frequency should be installed in the L or Low positions. Pairs of the higher frequency should be installed in the H or High positions. When you are installing two pairs of low filters or two pairs of high filters, you may not notice any difference between H and L switch positions. The maximum phase shift above 15 MHz is somewhat less than 360 degrees. You may want to experiment in swapping H and L sets to see how they 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 top of the relays as shown. Position the plastic spacer over the relays. Once you know the fit is okay, peel the paper off of the tape, place the plastic spacer in place and press gently to stick to the top of the relays. Install one set of filters in the Low-A and Low-B positions (can go in either direction) by centering the connectors over the pins. Ensure you are plugging into all of the pins and you are not offset or missing one pin connection. Install the second set in the High-A and High-B positions. - 11 -
The installed filters sets will be activated when you switch the NCC-1 front panel switch L BAND H. When switched in the L the L set will be active, when the switch is in H position the H set will be active. Replace the cover and four screws with washers that were removed earlier. Filter Sets available from DX Engineering DX Engineering Cut off Center Filter Description Part Number Frequency Frequency DXE-NCCFL-LP160M 2 Filters, Receive Only, Low Pass, 160 M and below 2.30 MHz DXE-NCCFL-LP80M 2 Filters, Receive Only, Low Pass, 80 M and below 4.00 MHz DXE-NCCFL-LP40M 2 Filters, Receive Only, Low Pass, 40 M and below 7.50 MHz DXE-NCCFL-LP20M 2 Filters, Receive Only, Low Pass, 20 M and below 15.00 MHz DXE-NCCFL-LP15M 2 Filters, Receive Only, Low Pass, 15 M and 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 Only, High Pass, 80 M and above 3.40 MHz DXE-NCCFL-HP40M 2 Filters, Receive Only, High Pass, 40 M and above 6.60 MHz DXE-NCCFL-HP20M 2 Filters, Receive Only, High Pass, 20 M and above 13.70 MHz DXE-NCCFL-HP15M 2 Filters, Receive Only, High Pass, 15 M and above 20.20 MHz DXE-NCCFL-HP10M 2 Filters, Receive Only, High Pass, 10 M and above 27.90 MHz DXE-NCCFLBPF160M 2 Filters, Receive Only, Band Pass, 160 M only 1.85 MHz DXE-NCCFL-BPF80M 2 Filters, Receive Only, Band Pass, 80 M only 3.70 MHz DXE-NCCFL-BPF40M 2 Filters, Receive Only, Band Pass, 40 M only 7.15 MHz DXE-NCCFL-BPF20M 2 Filters, Receive Only, Band Pass, 20 M only 14.15 MHz DXE-NCCFL-BPF15M 2 Filters, Receive Only, Band Pass, 15 M only 21.15 MHz DXE-NCCFL-BPF10M 2 Filters, Receive Only, Band Pass, 10 M only 28.50 MHz - 12 -
Technical Support If you have questions about this product, or if you experience difficulties during the installation, contact DX Engineering at (330) 572-3200. You can also e-mail us at: DXEngineering@DXEngineering.com For best service, please take a few minutes to review this manual before you call. Warranty All products manufactured by DX Engineering are warranted to be free from defects in material and workmanship for a period of one (1) year from date of shipment. DX Engineering s sole obligation under these warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be other than as warranted; no allowance shall be made for any labor charges of Buyer for replacement of parts, adjustment or repairs, or any other work, unless such charges are authorized in advance by DX Engineering. If DX Engineering s products are claimed to be defective in material or workmanship, DX Engineering shall, upon prompt notice thereof, issue shipping instructions for return to DX Engineering (transportation-charges prepaid by Buyer). Every such claim for breach of these warranties shall be deemed to be waived by Buyer unless made in writing. The above warranties shall not extend to any products or parts thereof which have been subjected to any misuse or neglect, damaged by accident, rendered defective by reason of improper installation, 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 outside of our plant, and shall not apply to any goods or parts thereof furnished by Buyer or acquired from others at Buyer s specifications. In addition, DX Engineering s warranties do not extend to other equipment and parts manufactured by others except to the extent of the original manufacturer s warranty to DX Engineering. The obligations under the foregoing warranties are limited to the precise terms thereof. These warranties provide exclusive remedies, expressly in lieu of all other remedies including claims for special or consequential damages. SELLER NEITHER MAKES NOR ASSUMES ANY OTHER WARRANTY WHATSOEVER, WHETHER EXPRESS, STATUTORY, OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NO PERSON IS AUTHORIZED TO ASSUME FOR DX ENGINEERING ANY OBLIGATION OR LIABILITY NOT STRICTLY IN ACCORDANCE WITH THE FOREGOING. DX Engineering 2017 DX Engineering, DXE, DX Engineering, Inc., Hot Rodz, Maxi-Core, DX Engineering THUNDERBOLT, DX Engineering Yagi Mechanical, EZ-BUILD, TELREX, Gorilla Grip Stainless Steel Boom Clamps, Butternut, SkyHawk, SkyLark, SecureMount, OMNI-TILT, RF-PRO-1B, AFHD-4 are trademarks of PDS Electronics, Inc. No license to use or reproduce any of these trademarks or other trademarks is given or implied. All other brands and product names are the trademarks of their respective owners. Specifications subject to change without notice. - 13 -