Ten-Tec_RX-321_user.pdf

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1、Radio Receiver RX-321 The Manual That Never Was Frank Gentges K0BRA based on a webpage by Jim Handcock December 2007 Radio Receiver, RX-321 User Guide December, 2007 TABLE OF CONTENTS Preface3 Chapter 1, General Information 4 Chapter 2, Operation 6 Chapter 3, Functional Description 12 Chapter 4, Cir

2、cuit Diagrams15 Appendix 1, eBay Auction Text 27 Appendix 2, Reviews29 Appendix 3, Toys34 Appendix 4, User Groups 35 Page 2 of 35 Radio Receiver, RX-321 User Guide December, 2007 PREFACE Globe Wireless contracted with Ten Tec a some years ago to produce a modified version of the RX-320 for shipboard

3、 use as a secondary receiver in their shipboard communications system, and Ten- Tec designated it the RX-321. GW was able to do this as GW is one of Ten-Tecs single largest customers. GW uses the RX-330(A you have to download new drivers). CALLSIGN SOFTWARE provides some insights on problems with th

4、ese. USERS WITH USB to SERIAL Adapters: Some of our users have had many problems with these devices because most cannot keep up with the duty cycle rates of a NULL Modem or the supplied software driver does not properly comply with the Microsoft Windows(c) Driver model. NULL Modem compliance means t

5、hat they MUST be capable of sustaining a continuous data stream much like that encountered when downloading files. They must also support modem controls for data flow control which we use on all the radio products that support this. Failure of the USB/Serial Adapter to comply with this will result i

6、n improper operation of the software. These capabilities must be stated on the product. We recommend the RadioShack 9 pin Serial to USB adapter cat#26-183. It is less than $50.00, comes with an XP and 2000 driver, and is widely available. We have been using this adapter (four of them) and have had n

7、o problems with them on Windows 2000, XP PRO, and XP Home. We have been using them with a USB 2.0 port and a four port USB 2.0 hub. We have also tested the software with PCMCIA (Serial Gear RS-232C) to serial adapters. We have thoroughly tested the software with the previously mentioned adapter(s) a

8、nd found no problem with them for the past three(3) years. These adapters have software drivers that are well behaved in Windows and do not interfere with the operation of Windows, or other drivers, as some VERY POORLY written drivers do from some of the other vendors. Page 8 of 35 Radio Receiver, R

9、X-321 User Guide December, 2007 Control Programs Ten-Tec had the wisdom to publish the control codes for the RX320 as RX-320 PC RADIO Programmers Reference Guide. The result was a number of different programs to control and display the RX-320. These programs work transparently with the RX-321 and th

10、e Past & present RX320/RX321 Control programs, mods are shown here. Some of these programs are in the Files section of the Yahoo RX320 group. See the Monitoring Times article at: on the RX320 for more information. Page 9 of 35 SHORTWAVE LOG Natively supports the RX321 & allows the RX321 to be contro

11、lled remotely via a web page. SCAN320 Designed for scanning Utes, modified for general purpose RxPlus Swiss Army Knife. it does it all with DSP. MICHAEL A. NEWELL Software for the Palm OS George Privalovs Synchronous AM Controller Ten-Tec OEM software TRX MANAGER CLIFTON TURNERS RX320 & DB320 The fi

12、rst and still about the best. Gerd Niephaus GNRX320 can use the Klingenfuss Ute database. Radio Receiver, RX-321 User Guide December, 2007 Page 10 of 35 N4PY Radio320 Designed for function. RXWings DXTRA ERGO RXtra320 SCANCAT Scopestation The closest thing to a Ham controller. RX320 software for Lin

13、ux *Click here to install xclass for above Linux program * Hamsoft Linux Controller PenguinSoft linux Controller Debian RX320 package Radio Receiver, RX-321 User Guide December, 2007 Page 11 of 35 PDA Cogwheel Dos programs Tom Cooper David Wilson *A hardware controller & case for the RX32* radios *

14、Radio Receiver, RX-321 User Guide December, 2007 CHAPTER 3 FUNCTIONAL DESCRIPTION RX-320/RX-321 Design Details and Differences: The basic heterodyne scheme is shown Figure 4. FIGURE 4: RX-320/RX-321 Mixing Block Diagram Receiver Tuning Speed: When changing synthesizer frequency, there is significant

15、 chuffing (short noise bursts as the synthesizer steps in frequency) at times, enough to make VFO type operation (many steps over a short time interval) somewhat annoying to the listener. The RX-321 is intended for use in a channelized system without the need for frequent retuning. The chuffing is p

16、robably a result of lengthened PLL loop filter time constants to improve the phase noise characteristics of the synthesizer, and the chuffing noise is generated as the PLL unlocks temporarily upon a frequency change. There is a compromise in PLL design between lock time and VCO phase noise, and appa

17、rently Ten Tec chose to favor decreased phase noise over lock time in their design, which is acceptable in this application. This kept costs down by eliminating the need for a higher- performance, i.e. More complex and expensive synthesizer. TCXOs for 2nd and 3rd LO oscillators are added. The RX321

18、is dead on within 10Hz cold or Page 12 of 35 Radio Receiver, RX-321 User Guide December, 2007 warm. Reference Oscillators: The two oscillator cans on the RF board are not ovenized but are TCXOs (Temperature Compensated Crystal Oscillators) built most likely by Fordahl and are specd at +/- 10 Hz over

19、 0 to 40 degrees C. These TCXOs bear the part number of DFA 14 KHV. From Fordahls Generic Ordering Codes sheet this part number translates as: DFA = TCXO 14= DIL 14 (dual in-line 14 pin) K= -30 to +60 degrees C H= HCMOS logic level output V=external control voltage. That final V suggests the little

20、pots (R104 and R106) next to the oscillators create a trimming voltage to put each on its frequency. 7 front end filters added. switched by pin diodes. Firmware provides control of this front end filtering. 1st mixer has improved double-balanced quad fet mixer for higher IP values. AGC injection on

21、3 points with extra gain controlled dual-gate FET right after 45 MHz IF filter. Added Pin diode AGC following preselection and 45Mhz filter. The active antenna circuitry inside the RX320 is gone with the RX321. That circuit could have been a source of intermodulation products. The antenna connector

22、is an SO-239 on the RX321 instead of the RCA plug on the RX320. The DC power is shown as 12-28VDC on the RX321 instead of the unspecified power on the RX320. Power supply: separate board for voltages. Added a step-up voltage regulator for higher voltages for front end. I measured 18V to front end. L

23、ow ripple and noise. DC power and the speaker connect via a terminal strip on the RX321 while the RX320 uses phone plugs and DC coaxial connectors. RS232 device is a ADM232AARN instead of max232 type. Remote audio line out on the RX321 is a balanced, center tapped transformer. Line level audio outpu

24、t through an isolation transformer, balanced audio out. Page 13 of 35 Radio Receiver, RX-321 User Guide December, 2007 The RX321 has a mute connection. The RX321 comes with a nice little 120 VAC to 12 VDC switching power supply. The RX321 has a power LED and a more rugged power switch. The RX321 run

25、s on RX320 software and it seems to work just fine with all functions doing what they should. The DSP board is slightly different with a different part number and different EPROM identifier. The IF is not brought out like on the RX320D for digital radio. The cable can be spliced and an IF output add

26、ed. It works down to 100 kHz. Page 14 of 35 Radio Receiver, RX-321 User Guide December, 2007 CHAPTER 4 CIRCUIT DIAGRAMS Somewhere along the line, an anonymous person provided a set of circuit diagrams for the RX-321. We are all appreciative for these. Prior to this, we took a picture of the RF board

27、 and marked the various circuit areas and what function was in each place. That picture is included. It should prove helpful for finding different parts of the circuitry for modification or repair. Page 15 of 35 Radio Receiver, RX-321 User Guide December, 2007 Page 16 of 35 Radio Receiver, RX-321 Us

28、er Guide December, 2007 Page 17 of 35 Radio Receiver, RX-321 User Guide December, 2007 Page 18 of 35 Radio Receiver, RX-321 User Guide December, 2007 Page 19 of 35 Radio Receiver, RX-321 User Guide December, 2007 Page 20 of 35 Radio Receiver, RX-321 User Guide December, 2007 Page 21 of 35 Radio Rece

29、iver, RX-321 User Guide December, 2007 Page 22 of 35 Radio Receiver, RX-321 User Guide December, 2007 Page 23 of 35 Radio Receiver, RX-321 User Guide December, 2007 Page 24 of 35 Radio Receiver, RX-321 User Guide December, 2007 Page 25 of 35 Radio Receiver, RX-321 User Guide December, 2007 Page 26 o

30、f 35 Radio Receiver, RX-321 User Guide December, 2007 APPENDIX 1 eBAY AUCTION TEXT Ten-Tec RX-321 HF Receiver. DRM ready This receiver is the RX-321made by Ten-Tec, it is a custom version of the RX-320 PC Radio. It has also been modified professionally, to add 12 kHz DRM output at the remote jack. A

31、s mentioned it has been modified for DRM. The DRM pin has been professionally added to the 9-pin jack on the rear panel, see picture. I am including the HF radio receiver, RX-321 and the small switching power supply that powers it. I have purchased several over the last few months and had them all m

32、odified. I am running 3 now, but just have a few spares. They really work great, Im sure youll be pleased with your purchase and the specifications are better than the RX-320s, as is the performance. I am not providing any documentation with this radio. However, more information can be found at the

33、ten-tec website: along with free software. There is also a users group at: NOTE: This radio is similar to the RX-320D, not the older RX-320. It does have an IF output at the DB-9 connector (clearly marked, see picture) allowing for quick DRM functionality. You will have to get the proper software fo

34、r DRM. The radio control software and programming manual for the RX-320 can be found at: There are lots of shareware and free programs as well as some very nice professional programs available that will operate this radio. RX-320 vs. RX321: The RX-321 has the following physical differences from the

35、RX320: 1. There is NO independent Line Out jack jack, however audio out is accessible through the Remote DB9 connector. 2. There is NO whip antenna provision. (Almost useless anyhow, a real antenna should always be used.) 3. An antenna is required via the UHF connector, not a cheap RCA type connecto

36、r, as on the Rx-320. The RX-321 has the following Performance Improvements: 1. Improved oscillator w/ +-10 Hz frequency stability. (0 to 40 C). 2. 2nd order intercept +60 dBm. 3. 3rd order intercept +15 dBm. If you want a more complete list of RX-320 Specifications (not true RX-321 Spec?s) visit: Pa

37、ge 27 of 35 Radio Receiver, RX-321 User Guide December, 2007 Remote Connector Pinout: Pin 1 Line audio 600 Ohm Pin 2 Line audio 600 Ohm Pin 3 12Khz IF Pin 4 Ground Pin 6 Line audio (center tap) Pin 9 Ground. Please note that Ten-Tec does not provide customer support for the RX-321, since it was a cu

38、stom radio made for Global Wireless. This is a surplus radio and they are in very good condition. Cash, Certified Bank Check or U.S. Postal Money Order only. U.S. Orders only. A fixed shipping/Insurance charge will be $20.00 via U.S. Post Office Insurance value will be for the full winning amount. I

39、t will be carefully wrapped and shipped with 2 days of receipt of payment. Thanks for looking, you?ll really enjoy this radio and Good luck. Page 28 of 35 Radio Receiver, RX-321 User Guide December, 2007 APPENDIX 2 REVIEWS Eham reviews of the RX321: Reviews Summary for Ten-Tec RX-321 (Globe Wireless

40、) Ten-Tec RX-321 (Globe Wireless) Reviews: 7 Average rating: 5.0/5 MSRP: $(missing?add MSRP ) Description: Computer controlled HF receiver More info: http:/ You can write your own review of the Ten-Tec RX-321 (Globe Wireless). N1LF Rating: 5/5 Apr 22, 2006 10:57 Send this review to a friend Great va

41、lue! Time owned: more than 12 months I use this receiver primarily for MW DXing, and find that the RX-321 compares very favorably to my Drake R8B, and my Icom 746Pro for this purpose. Connections are simple. 50 Ohm Antenna, Ground, 12 Volt DC, serial cable for the PC, and a shielded audio cable that

42、 runs to your soundcard. Lots of software, (freeware and otherwise) available.virtually anything that works with the RX-320 works fine with the RX-321. Best features? Lots of bandwidth options, Passband tuning.etc. I also often feed the 8khz wide audio signal to the DReaM software, which requires a

43、14khz IF signal, but works fine using the 8khz wide audio signal as an IF.this then allows you to customize any filter shape and see the spectrum. Amazing combination for MW DXing, at a very affordable price. Page 29 of 35 Radio Receiver, RX-321 User Guide December, 2007 If youre serious about MW DX

44、ing and on a budget, youll find it hard to beat the RX-321. Also use it to monitor secondary frequencies during Hurricane Season, and it works great as a SW-HF receiver too. SWL377 Rating: 5/5 Aug 2, 2005 10:32 Send this review to a friend Great rcvr but a Ten Tec orphan Time owned: 0 to 3 months I

45、own both a Ten Tec 320 and, finally succumbing to the chat group pressure, a 321. The 321 has considerably better front end and freq stability specs than the 320, but I have yet to see any real world difference in performance. Maybe in a strong signal environment the 321 would outshine the 320, but

46、at my location they seem to be about the same performance wise. Remember if you buy a 321 you are on your own, Ten Tec will NOT service them or even answer any questions about them. The otherwise nice folks at Ten Tec snarl and snap if you even ask about support for non standard radios like the SP 3

47、25 they made for the US Navy (yes, I have one of these too). Globe Wireless apparently had the 321 custom engineered by Ten Tec as the heart of a GMDSS rcvr system that as far as I can tell never made it to market. My guess is that there were less than 100 of these made. Do I enjoy using my 321? Wel

48、l, actually not so much. I just dont like the computer user interface. I like knobs and switches. There are some aftermkt knob and switch kits for these rcvrs, but they still dont give you the feel of a full panel of knobs like youd find on an old Hammarlund or Hallicrafters. Should you buy a 320 or

49、 a 321? If you are worried about service, get a 320 definitely. If you must have the better specs in a 320-like radio and are willing to risk breakdowns without any service availability, then get a 321. Both are fine rcvrs and truly AMAZING values when you examine price vs performance. Nothing else comes close, not even the Sony 2010 which for years was the value leader. Either the 320 or 321 will