Ten-Tec RX-400A USERS MANUAL-7-25
Contents
1. 8 0 AUDIO STREAMING 8 1 Radio Over IP RIP Data 9 0 MAINTENANCE Factory 9 2 Cleaning and LUBRICATION leet accolto e Ee a d tette eae 8 2 ni secet d Pri aces 9 4 Performance Verification and Fault OG Fan SDeed 10 0 5 5 10 1 SSEO PAGS eai Gi 10 2 10 1 10 1 74446 FIGURE 2 1 2 2 2 3 2 4 2 5 2 6 3 1 5 1 9 1 LIST ILLUSTRATIONS RX 400A Front View RX 400A Rear View RX 400A RCU 400A Rack Assembly Front View RX 400A RCU 400A Rack Assembly Rear View RX 400A Receiver 3 View Drawing RX 400A Electrical Block Diagram RX 400A RCU Installation Drawing RX 400A Functional Block Diagram Cooling Fan Filter Removal PN 74446 PAGE 2 3 2 7 2 8 3 3 9 1 TABLE 2 1 2 2 3 1 3 2 7 i 7 2 LIST OF TABLES RX 400A Specifications Environmental Conditions Receiver Power Requirements Rack Mount Kit Contents RX 400A Audio Connections Baud Rate Settings Command Parameters PAGE 2 4 2 6 7 i 7 3 PN 742. cube Avr RENS ER 5 2 1 Low Band Preselectol u dero eden db dps 5 2 2 Mid Band 5 2 3 First 5 2 4 Second Convertet 52 5 Thi Converter edo aee 5 2 6 First Local OSC ALOR 5 2 7 5 2 8 Third Eocal OsclllgbOT 5 2 9 Logic DSP SECHOM 5 2 1 aea iat 6 0 FIRMWARE LOAD AND UPDATE PROCEDURES Introduction c ceed 6 2 Required Application 016 6 3 Firmware Load Update 7 0 RECEIVER REMOTE CONTROL 7 1 Introduction cote Qi eto pu cuni 7 2 Serial Interface 7 2 1 Communications 7 3 Command Message Formatting esee nnns 7 4 Terminators for Commands and 7 5 Query Response corse e deett ro EP eR idet e ndr cob nU 7 6 Control CER se Bede Ue REX nad 7 6 1 Command
3. 5 0 2 4 adi ana bb PR A ERE 2 9 BIGCtbledl assist inpr 3 0 PREPARATION FOR USE AND INSTALLATION 3 1 Unpacking and InspectlofTzs usce 3 2 uro tut 922 BONIS d Rd c Ed 3 4 RF IF Ext Reference and Audio 3 5 Remote Control 00000 000000 3 6 Connection to RCU 400A Receiver Control 3 7 Configuration DID UU ue 358 a i E ccn 3 9 Front Panel CODLOLIS s ouo vore rive ree o encender adr ria 3 10 esdbhories Jackass a bc amp 3 11 Front Panel Indicators encender a n Ede 3 12 d qu 3413 Chassis m cote e ER 4 0 OPERATION 2l Power ON OFF Ro OUI 4 2 Headphones cds rta 4 3 Status IndicatolS intet oai ta uhi rta CJ QJ QJ QJ CJ QJ CJ CJ CJ CJ CJ WW U1U1U01U01U1U1U1 h2 h2 Pee PN 74446 TABLE CONTENTS cont d PARAGRAPH 5 0 THEORY OF OPERATION m NEES IUIS 5 2 Circuit DescriptlOliS 45 1
4. Figure 5 Audio Connections Pin Description Note 1 Chassis Ground 2 A C Coupled Mono Audio Unbalanced 10dBm output ANB base nominal 4 Line B center tap o eet 5 Line ES a eee 6 Line A 600 Ohm balanced output 0 dBm nominal 7 Line A center tap 8 Line A 9 Chassis Ground 10 DC Coupled Mono Audio Unbalanced 104 output 11 No Connection 12 User Programmable Output 1 Low 0 volts High 3 3v not available when frequency extender attached _ 13 User Programmable Output 2 Low 0 volts High 3 3v not available when frequency extender attached 14 User Programmable Output 3 Low 0 volts High 3 3v not available when frequency extender attached User Programmable Output 4 Low 0 volts High 3 3v not available when frequency extender attached Part Number 74416 Ten Tec RX400 Manual Revision 0 5 TABLE 3 2 RX 400A AUDIO CONNECTIONS PN 74446 3 4 3 7 CONFIGURATION DIP SWITCH The rear panel contains a recessed two section Dip Switch used to set the operating configuration for the Receiver The first section contains 8 switches and the second contains 4 switches For normal Receiver operation place the first section with switches 1 2 and 3 in the UP position and 4 through 8 in the DOWN position All four switches 1 through 4 are placed in the UP position for the second switch section p w vyx 1234567 8 1234 3 8 FUSE A replacea
5. Get command P1CCC cr Response P1CCCBBMSSRFFFFFFFFFF lt cr gt Definitions CC Channel Number to assign parameters Range 00 999 in ASCII decimal format BB Selected IF Bandwidth filter number assigned to the specified channel number Range See Table 5 M Selected detection mode assigned to the specified channel lt gt lt lt F gt FM lt U gt USB lt L gt LSB lt C gt CWU lt W gt CWL lt K gt FSK SS Selects the desired squelch mode settings Multiple squelch modes can be selected R lt A gt channel specified in command is added to the channel ring lt D gt channel specified in command is deleted from the channel ring FFFFFFFFFF Frequency to tune assigned to specified channel number Range 100kHz 3 GHz Leading zero s can be omitted Memory Scan Channel Start Stop Range P2 Format Set command P2SSSEE lt cr gt 1 Get command P2 lt cr gt Response P2SSSEE lt cr gt Definitions SS Specifies the starting channel for the memory scan via two ASCII digits Range 0 999 EE Specifies the ending channel for the memory scan via two ASCII digits Range 0 999 lt emory Channel Skip Add P3 Format Set command P3CCCX lt cr gt 1 Get command lt gt Response lt gt Definitions CC specifies the channel to be added or deleted to the memory list when scanning Range 0 999 X A adds the specified channel to the memory list w
6. USER MANUAL INSTALLATION AND OPERATION HF VHF UHF DSP RECEIVER MODEL RX 400A TEN TEC INC 1185 DOLLY PARTON PARKWAY SEVIERVILLE TN 37862 THIS MANUAL WAS PREPARED IN ACCORDANCE WITH MIL HDBK 1221 157 PRINTING 3 10 PRINTED IN U S A PART NO 74446 RECORD CHANGES CHANGE NO DATE TITLE OR DESCRIPTION ENTERED BY para 4 3 page 4 1 add Mission Download feature notation para 5 2 5 page 5 5 add AGC mode description para 7 6 1 page 7 22 add Mission Download command word listing J Andem J Andem J Andem P N 74446 HIGH VOLTAGE Is used in the operation of this equipment DEATH ON CONTACT may result if personnel fail to observe safety precautions Learn the areas containing high voltage within the equipment Be careful not to contact high voltage connections when installing operating or maintaining this equipment Before working inside the equipment turn power OFF and ground points of high potential before touching them P N 74446 TABLE 5 LIST OF 65 n LIST OF TABLES 1 0 INTRODUCTION 1 1 Purpose Scope and Content eee eeeeee nennen nnns nnns 2 0 GENERAL INFORMATION 2 1 RX 400A Purpose and 0 0444 2 2 Specifications orate ed vb id en 2 3 Environmental
7. Figure 2 3 RX 400A Receiver Mounted Side By Side with RCU 400A Receiver Control Unit Front View Figure 2 4 RX 400A Receiver Mounted Side By Side with RCU 400A Receiver Control Unit Rear View 2 3 PN 74446 2 2 SPECIFICATIONS TABLE 2 1 Parameter Performance Frequency Range 100 kHz to 3000 MHz Tuning Resolution 1 Hz steps 10kHz steps at WB IF output Operating Modes Manual Tune F1 F2 Scan and Memory Channel directed search Detection Modes AM FM USB LSB and CW Frequency Stability 20Hz below 30 MHz 0 5ppm above 30 MHz Frequency Accuracy All oscillators locked to int ext reference External Reference 1 2 5 or 10 MHz 10dBm nominal receiver automatically switches to this reference upon application Spurious Responses All spurious less than 105 dBm equivalent input max except with approx 6 spurs less than 80 dBm Image Rejection 80 dB typical 2 3000 MHz IF Rejection 80 dB typical 2 3000 MHz Tunable in CW mode only 8 kHz in 10 Hz steps fixed offset in USB LSB modes disabled in AM FM modes Memory Channels 1000 each full receiver parameter set up Scan Rate 100 channels per second or faster adjustable Gaze Dwell and Dead times Approximately 1 millesecond Adjustable 0 127 dB Std 27 IF bandwidth set 100 Hz to 300 kHz independent of detection mode 1 5 1 shape factor or better DSP derived 3 dB ripple max S N BW dBm 10 dB 3 kHz 10 dB 6 kHz 16dB 15 kHz 16 dB 50 kHz 16
8. MSB first e g if sampling frequency is 54081 the value returned would be 0x00 0x00 Oxd3 0x41 Because the RX400 sample rate is related to filter selection this will change when filters are changed 128 octets Audio Data Oxnn The audio data samples are two octets long and there are 64 of them Format is 2 octets per sample MSB first There are two commands to start and stop the RIP process Stop Ethernet RIPing lt gt Start Ethernet RIPing 1 lt gt 74446 8 1 9 0 MAINTENANCE 9 1 FACTORY SERVICE The RX 400A Receiver is designed to provide reliable service however should non recoverable faults or equipment failure occur it is recommended the unit be returned to TEN TEC Inc for repair The TEN TEC Service Department provides quick turn around for most repairs RMA numbers are not required You may contact TEN TEC to arrange for service at 865 428 0364 Hours are 8 00AM 5 00PM Monday through Friday Or send e mail to service tentec com If known please indicate the nature of the fault or defect Also include return shipping address and any special instructions related to marking or packing 9 2 CLEANING AND LUBRICATION Panel surfaces may be cleaned using a soft damp cloth and a mild detergent solution Never use caustic cleaners or any type of solvent as this may damage painted and chem treated surfaces and plastic parts and knobs The Receiver cooling fan filter will require periodic
9. 1 kHz optional Low Band receive frequencies use a 240 kHz segment of this range from 118 48 to 118 72 MHz to fill in the 250 kHz tuning steps produced by the divided down first LO The third LO injection signal is amplified and applied to the LO port of the mixer A 159 MHz trap attenuates a potential image frequency response The 21 4 MHz IF resulting from this low side mix provides two outputs from the THIRD CONVERTER module The Wideband IF Output is sampled by a directional coupler and then low pass filtered This output is either 2 MHz or 6 MHz wide depending on the receiver tuned frequency and has 10 kHz 1 kHz optional tuning resolution The Narrowband Output is filtered to 300 kHz bandwidth amplified and AGC leveled then delivered to the DSP BOARD Double resonator filters along with an amplifier provide a 21 4 MHz tuned IF stage which delivers a 300 kHz sub band of the mixer output to a variable gain amplifier Additional fixed gain amplifiers boost the signal to a maximum of 1 volt peak to peak which is then low pass filtered before being fed to the AGC detector A balanced diode detector samples the IF signal at the output of an amplifier and provides a rectified signal envelope to the AGC amplifier Components in the AGC loop determine the circuit time constants Buffers for the AGC node voltage complete the AGC loop The active region of the VGA control input is 0 25 to 1 5 volts with a positive slope of 32 dB V establishing a 40
10. connection is made to Receiver via a SMA connector Both WBIF outputs are connected to external devices using SMA connectors cables Likewise an external reference signal can be connected with a SMA cable Balanced Line Audio is available on a rear panel 15 pin D connector where connections are made via a customer furnished mating connector and cable assembly Pin assignments are listed in Table 3 2 3 5 REMOTE CONTROL CONNECTION RX 400A Receiver control is via two 2 interface connectors on the rear panel One is a USB 2 0 interface using the standard USB type connector The other is ETHERNET using a RJ 45 type jack Either interface can be used to control the receiver and the command sets are identical however only the ETHERNET interface provides the digital audio streaming capability Please see Chapter 7 for detailed information for command words 3 6 CONNECTION TO THE RCU 400A RECEIVER CONTROL UNIT For operator manual control of the Receiver it can be connected to a companion RCU 400A Receiver Control Unit either co located with the Receiver or at a different position from that of the Receiver In this case use the ETHERNET interface on the Receiver and connect a cable to port 1 through port 7 on the RCU 400A PN 74446 3 2 81 006 epis 209 045 8 FIGURE 3 1 400 and RCU 400A INSTALLATION PN 74446 3 3 7 58848680 5555845 8
11. dB 200 kHz 96 Dynamic Range Freq NF typ 2 88 MHz 12 2 dBm 89 1650 MHz 1 3 dBm 1651 3000 MHz 14 dB 3 dBm 274 Order Intercept Point 50 dBm minimum 2 4 PN 74446 TABLE 2 1 Cont d SPECIFICATIONS Parameter Performance Fast Medium Slow amp Programmable Manual Gain MGC setting provided in all 4 modes 120 dB range AGC DUMP in all 4 modes Mode Attack Hang Decay Fast 0 8 dB ms 0 1200 dB Sec Medium 0 8 dB ms 0 100 dB Sec Slow 0 8 dB ms 0 25 dB Sec Prog 01 1 0 dB ms 01 99 9 01 99 9 Sec dB Sec Analog 21 4 MHz CF fixed gain 6 MHz BW 10 kHz tuning steps 2 MHz BW below 20 MHz receiver tuned frequency Reports signal level to host in dBm on request Control Interface s 2 Ethernet TCP IP RJ 45 and USB std 2 0 Firmware Can be updated remotely into Flash ROM Antenna RF Input 50 ohms unbalanced SMA connector 2 5 1 VSWR max Line Audio Output s 2 each 0 dBm 3 dBm 600 ohms One AC coupled one DC coupled 15 pin D Headphone s Output 2 stereo jacks one std inch one std 1 8 10 mW into 600 ohms front panel volume control Reports pass fail status to host on request Less than 30 minutes for replacement of any of 9 major sub assemblies PN 74446 2 5 2 35 ENVIRONMENTAL CONDITIONS The RX 400A Receiver is a rugged design intended for commercial government and military applications The unit is specifically suitable for fixed site vehicle or she
12. describes the Audio Streaming function Chapter 9 provides maintenance information Chapter 10 gives instructions to prepare the Receiver for storage or shipment 1 1 PN 74446 2 2 0 GENERAL INFORMATION 2 1 RX 400A RECEIVER PURPOSE AND FUNCTION The TEN TEC RX 400A is an all mode wide RF coverage HF VHF UHF receiver that delivers military grade performance in a Commercial Off The Shelf COTS product The unit is designed to provide signal acquisition monitoring and collection functions using manual tuning frequency scan or directed search memory channel modes of operation The RX 400A covers the frequency range of 100kHz to 3000 MHz using a mix of high performance analog circuitry for the RF to IF conversion path coupled to a digital back end comprised of the latest digitizer and DSP techniques to provide a software defined receiver The DSP section provides 27 digital IF filters from 100Hz to 300kHz and AM FM USB LSB and CW detection modes Other than a power ON OFF switch headphone jacks volume control and status indicators the receiver has a blank front panel thus is designed for remote control operation Remote control is via companion RCU 400A Receiver Control Unit or via a host PC using an optional Graphical User Interface GUI software package Weir TEN TEC DATA 6 C LINK HEADPHONES RX 400A HF VHF UHF RECEIVER Figure 2 1 400 Front View All int
13. 08 4 to 788 MHz in 400 kHz or optionally 40 KHz steps to the RF input of the PLL which is programmed to divide by 40 producing a 17 71 to 19 7 MHz reference in 10 kHz or optionally 1 kHz steps at the phase comparator A VCO driving buffer develops the module output The mixing loop is closed via a mixer which subtracts 100 MHz from the VCO output of 117 71 to 119 7 MHz to provide 17 71 to 19 7 MHz directly to the phase comparator R 1 through a low pass filter When the receiver is tuning the Low Band 2 88 MHz the Third LO output frequency is restricted to the range 118 48 to 118 72 or optionally 118 471 to 118 720 to fill in the 250 kHz stepping of the divided down First LO PN 74446 5 6 5 2 9 Logic DSP System The RX 400A Logic DSP assembly incorporates Digital down Conversion Signal Processing Control amp Interface Power and Master Clock Reference circuitry on a single circuit board The Logic DSP board controls all Preselector RF Converter and Local Oscillator LO boards over ribbon cables The RF LO and Preselector boards are programmed by the DSP processor via the attached ribbon cables to achieve the correct RF tuning In addition the DSP board monitors LOCK DETECT LD signals from the LO boards to be reported to the controller as status information The processor is an Analog Devices ADSP 21364 DSP processor The DSP processor communicates with various other on board components to implement a unified signal processing a
14. 20 2 Format Set command lt gt Get command 2 2 lt gt 2 lt gt TTTTTTTT represents time in ASCII decimal format Value number of milliseconds Valid ranges are 0 99999999 Dead time refers to the time the radio will remain on a channel after activity has ended The factory default is 8 seconds If the DWELL TIME setting is less than the DEAD TIME setting the radio will resume scanning when the DWELL TIME timer runs out If the DWELL TIME setting exceeds the DEAD TIME setting scanning will resume when the DEAD TIME timer runs out Gaze Time T3 Format Set command T3TTTTTTTT lt cr gt Get command 2 3 lt gt Response lt gt TTTTTTTT represents time in ASCII decimal format Value number of milliseconds Valid ranges are 0 99999999 Gaze time is the time the radio will spend waiting for activity on each new channel or frequency The factory setting is 50Ms This time be adjusted to control the rate of scan S Meter Hold Off Time T4 Format Set command lt gt Get command 4 lt gt 4 lt gt TTTTTTTT represents time in ASCII decimal format Value number of milliseconds Valid ranges are 0 99999999 This feature determines how long the radio will wait before ch
15. 446 1 1 0 INTRODUCTION 1 1 PURPOSE SCOPE AND CONTENT OF USER MANUAL This manual provides installation and operation instructions as well as pertinent technical data for the RX 400A HF VHF UHF DSP Receiver The manual was prepared using MIL STD 1221 Department of Defense Handbook for Evaluation of Commercial Off The Shelf COTS Manuals as a guideline It is organized into Chapters along with a Table of contents List of Illustrations and List of Tables Chapter 2 presents general information about the RX 400A Receiver including functional capabilities performance specifications and physical characteristics Chapter 3 provides information concerning the unpacking inspection and mounting of the Receiver This chapter also provides instructions for making connections to the Receiver as well as identifying the use and location of chassis mounted components Chapter 4 provides detailed descriptions of all the front panel operating controls rear panel configuration switch and purpose of front panel status indicators Chapter 5 provides a brief theory of operation to provide the User with a working knowledge of the Receiver Chapter 6 contains the information and steps required to initially load or update the Receiver Firmware Chapter 7 Provides the User and System Manager with the data necessary to effect remote control of the Receiver to include interface description message formatting and command descriptions Chapter 8
16. D or equivalent The rack mount kit contains 4 pieces as listed in Table 3 1 TABLE 3 1 RM 400 2 Rack Mount Kit Contents U Channel Bracket Front Panel Center Bracket Rack Mount Ears R amp L 10 32 Hex Head Attachment Screws 3 1 PN 74446 To use the RM 400 2 rack mount kit first attach the U channel bracket to the inside side of one of the chassis using the rear 2 mounting holes out of the set of 3 with the furnished screws Then attach the front panel bracket to the chassis with the flat side toward front panel surface Next position the second chassis so the U channel and front panel brackets can be attached to the second chassis Now the 2 units are secured together with about a 2 inch gap between the chassis Next attach the left hand and right hand brackets rack mount ears using the furnished screws The ears are attached using 2 threaded 10 32 inserts at the front of the RX 400A chassis Refer to Figure 3 1 for parts orientation 3 3 POWER Ensure the Power Switch is in the OFF position on The RX 400A Receiver left side of switch depressed toward front panel Connect a customer furnished power cable with a female MS type 3 pin plug to the power connector on the rear of the RX 400A Pin wiring for the cable must be identical to that listed in Table 2 3 Next plug the other end of the cable into a 90 260 VAC single phase power source 3 4 RF IF EXTERNAL REFERENCE AND AUDIO CONNECTIONS The RF Antenna
17. ND PRESELECTOR board routes the High Band antenna signals through one of two high pass low pass filter cascades selected by switches Complimentary switch positions are determined by a logic line This arrangement creates two half octave sub bands of 1650 2200 MHz and 2200 3000 MHz selected portion of the High Band is further conditioned by an amplifier and high pass filter before being presented along with the Mid Band sub band to a switch Based on a logical AND combination the switch routes the selected sub band through another amplifier to the MID HIGH BAND PRESELECTOR board output 5 2 3 First Converter The FIRST CONVERTER module contains the first mixer and first IF amplifier for all receive frequencies above 88 MHz The first local oscillator moving in 2 MHz steps from 2528 to 4090 MHz is high pass filtered then amplified and applied as high side injection to the first mixer On the Mid Band receive frequencies of 88 1650 MHz the mixer produces a 2440 MHz first IF which is filtered and amplified by the cascade first IF filters This 2440 MHz IF has approximately 80 MHz bandwidth determined by SAW filters On the High Band receive frequencies of 1651 3000 MHz the first mixer produces a 1090 MHz first IF filtered and then amplified The 1090 MHz IF has approximately 14 MHz bandwidth determined by two dielectric filters 5 2 4 Second Converter The SECOND CONVERTER module contains the second mixer for all receive frequencies ab
18. SCII characters TABLE 7 2 COMMAND PARAMETERS Description _ SetCommand _ Query Command NotApplcabe BiITElevi2 Not Applicable BITElevi3 NotApplcabe EPI 21 Channel Attenuation Automatic Gain C5 Control Detection Mode Memory Recall Software Reset Load EEprom D1 ee Stop Ethernet Audio pce Start Ethernet E1 Address IP Address Communications Communications 7 3 Table 7 2 Continued Tune Frequency Start End F2 F2 Frequency Range for Frequency Scan F3 Start Halt Pause Re sume Frequency Scan Frequency T 7 Frequency Range Frequency Range Set Decay Rate Unit Serial Number Ee Version bes uela RR RR Info Channel Store current Memory Channel Memory Scan p2 P2 Channel Range Start Stop Channel Skip Add Memory Scan Halt Pause Resume Strength SquelhStatus Mo Applicabe 254 Address mode Address Mode 7 4 7 6 1 Command Descriptions The following will define a functional description of each control command or query command supported in the RX 400A Receiver Hardware HF Attenuator On Off Controls the hardware attenuator This attenuator 15 active in the HF bands only Format Set command 0 lt gt Get command 2 0 lt gt Response 0 lt gt 1 Definitio
19. ace the fan by the 4 screws previously removed then put in the filter element and snap on the fan bezel This completes the steps required to change the fan speed 9 2 74446 10 0 PREPARATION FOR SHIPMENT OR STORAGE 10 1 5 If the RX 400A Receiver is not going to be used for extended period of time excess of 30 days it should be stored in its sealed shipping carton or equivalent container The unit is rated for storage temperatures from 40 to 85 degrees To prepare the unit for storage perform the following steps 1 2 Remove all cords or cables attached to unit Ensure there is sufficient bubble wrap or packing material in the container Place the unit in the center of the packing material Place packing material on top of the unit and seal the container Fasten labels or stamps and with indelible ink write the word FRAGILE on all sides of the container Also write the model number nomenclature quantity and serial number on the top of the container 10 2 PREPARATION FOR SHIPMENT If the RX 400A is required to be shipped to another location or back to the factory for service perform the steps in 10 1 above Also include a packing slip any pertinent instructions or purchase order paperwork inside the container on top of the packing material Affix a shipping label to the outside of the container 10 1 PN 74446 This Intentionally Left Blank PN 74446
20. and filtered by a 3 GHz low pass filter on the MID HIGH BAND PRESELECTOR board then routed to the common terminal of a 4 position switch Below a 88 MHz receive frequency the RF signal from the antenna is connected to the LOW BAND PRESELECTOR board either directly or through a 20 dB resistive pad 5 2 1 Low Band Preselector Dual PIN diodes on the LOW BAND PRESELECTOR select one of eight sub octave bandpass filters Each of the eight filters selects a frequency band approximately 2 3 octave wide to cumulatively cover the Low Band range of 2 to 88 MHz slightly over 5 1 3 octaves After bandpass filtering the selected fractional octave band is amplified by and passed through a 140 MHz band reject filter This band reject filter provides additional attenuation of the Low Band 1st IF frequency Buffers pass serial data to a PIN diode driver Commands enables power to the RF preamplifier PN 74446 5 2 5 2 2 Mid High Band Preselector Position 3 of the switch on the MID HIGH BAND PRESELECTOR board routes the antenna signal through a bank of seven mid band filters selected by switches Logic lines determine complimentary switch positions The first mid band filter is dedicated to the US FM broadcast band of 88 108 MHz The remaining six filters have approximate 2 3 octave pass bands to cover 108 to 1650 MHz The selected filter output is amplified and low pass filtered then routed to the Mid Band High Band switch Position 4 on the MID HIGH BA
21. ay Rate G2 Format Set command G2NNNN lt cr gt Get command 2 2 lt gt Response 2 lt gt NNNN Valid range 0001 9999 ASCII decimal format Leading zeros can be omitted The attack rate is used in automatic gain control AGC to select the rate to lower the volume for strong signals to try to maintain an approximately constant average output level of varying signal levels Set Hang Time G3 Format Set command G3NNNN lt cr gt Get command 3 lt gt Response G3NNNN lt cr gt NNNN Valid range 0001 9999 in ASCII decimal format Leading zeros be omitted 7 15 Unit fault Status I1 Format Set command IIKKKKKKKKKK cr Get Command 2 1 lt gt Response By single character letter code This will be a key code used in the set command to clear out all error codes logged in the unit The key code will be a 10 character hard coded value used by Ten Tec Service to clear out the error codes Error Code Definitions This command will report error codes and fault conditions via one alphabetic character that are logged by the firmware They are defined as follows Firmware Version I2 Format Set Command Not Applicable Get Command 212 lt gt Response CCCCCCCCCCCCC lt cr gt Definitions This command will report the firmware version number The following strings are defined and will be reported for the specific unit
22. ble fuse is located above the power connector on the rear panel The fuse is removed and replaced using a small 1 8 wide common blade screwdriver Replace it with a 5x20 mm 1 Amp 250VAC time delay fuse 3 9 FRONT PANEL CONTROLS The RX 400A is designed for remote operation so the front panel controls are limited A switch is provided to control the unit power ON OFF 3 10 HEADPHONE JACKS Two headphone jacks are provided one for 1 4 inch and one for 1 8 inch stereo plugs 3 11 FRONT PANEL INDICATORS The power switch has a built in indicator that glows red when the unit is turned ON Data Link and SRQ LEDS are provided to provide the status of the Receiver 3 12 COOLING FAN A quiet running fan filter assembly is mounted to the front panel to provide cooling air flow to the Receiver 3 13 CHASSIS GROUND A chassis ground connection should be made on the rear panel using a 10 32 x 1 2 inch screw and terminal lug The ground wire should be AWG 16 or larger PN 74446 3 5 4 0 OPERATION Since RX 400A is intended for remote control operation is limited to power ON OFF audio volume control and viewing of status indicators It is assumed the Receiver will be connected to either a RCU 400A Receiver Control Unit or host PC using the optional Graphical User Interface GUT software package Connections are to be made per paragraphs 3 5 and 3 6 4 1 POWER ON OFF The Receiver power is turned ON by depressing the righ
23. can be applied to the received CW signal to alter its audio pitch as a detection aid The BFO frequencies are selected by the BFO commands 7 6 Bandwidth The operator may select one of 18 available IF bandwidth filters Format Set command C3BB lt cr gt Get command lt gt lt gt Definitions BB selects the desired bandwidth using 2 ASCII decimal digits See Table 7 3 for Filter selections Note Filter numbers are 2 ASCII digits Example lt 0 gt lt 0 gt for filter number 0 Filter Number Bandwidth Filter Bandwidth Number 07 17 08 3 1827 900 1002 9 202 y Table 7 1 Bandwidth Filters o 11 02 12 03 10 6 7 04 e 05 15 06 16 07 k 17 Store Current Parameters in Sweep Range A H C4 Format Set command C4 lt cr gt Get command 4 lt gt Definitions 7 7 Automatic Gain Control C5 The receiver provides 3 preset Automatic Gain Control rates and a programmable AGC mode The operator may select Slow Medium Fast or Programmable via the C5 command The three modes are selected as defined Format Set command C5X lt cr gt Get command 2 5 lt gt Response C5X lt cr gt Definitions X lt 5 gt select SLOW mode lt M gt selects MEDIUM mode lt F gt selects FAST mode lt P gt Programmable Mode Default M MEDIUM set
24. cleaning or replacement dependent on the operating environment The filter can be removed and replaced by grasping the edges of the fan bezel and pulling straight back Wash the filter in a mild detergent solution then let air dry Wipe the fan housing with a damp soft cloth Never use solvents of any kind as this may damage or dissolve the filter element Replace the filter element into the fan housing and snap on the fan bezel see Figure 9 1 PN 74446 FIGURE 9 1 FAN ELEMENT REMOVAL 9 1 9 3 INSPECTIO The RX 400A Receiver should be checked for external damage or component wear periodically This should include inspection of the front panel phone jacks for looseness proper power switch operation with illuminated red indicator with power ON volume control knob tight on it s shaft and intact cooling fan bezel and filter element Any time the unit is out of the rack console or if access is available to the rear of the Receiver the rear panel connectors should be checked for damage or looseness 9 4 PERFORMANCE VERIFICATION AND FAULT ISOLATION User level maintenance is limited to those tests that can be made at the operator position Performance verification consists of normal operation of the unit that is the receiver seems to exhibit adequate signal sensitivity through out the unit s frequency tuning range detection mode selections match the signal demodulation IF bandwidth selections result in expected audio response results withou
25. conveyed by the above start and stop bits The start bit synchronizes the receiving device so it reads the data properly The stop bit notifies the receiving device that the data frame has ended The 400 5 fixed data word frame format does not contain a parity bit 7 2 1 Communications Protocols Data transfers are handled via input and output buffers The input buffer is handled in circular fashion allowing simultaneous inputting and processing of data The input buffer accepts up to 256 bytes before overflowing As data in the buffer is being processed up to 16 additional characters can be accepted by the unit Upon receiving a terminator character the RX 400A processes any previous messages in the buffer The input buffer processing starts on the receipt of a terminator CR If the communications error flag is set the buffer contents from the end of the last processed message thru the message terminator are discarded the event the buffer is overrun its contents are discarded All other incoming data is buffered and processed in the order in which it was received If the radio does not understand a command sequence or the command is badly formatted the radio will respond with a Z followed by a carriage return The output buffer is handled in circular fashion allowing simultaneous additions and outputting 7 3 COMMAND MESSAGE FORMATTING Command messages for the RX 400A are exclusively ASCIT encoded data consisting of c
26. dB control range PN 74446 5 4 Manual Gain Control buffer and window comparator provide a means for the DSP processor to modify the analog AGC function When a digital to analog converter on the DSP BOARD reduces the MGC voltage below the existing analog AGC voltage feedback regulates the AGC voltage to the new set value The ANALOG and DIGITAL outputs inform the DSP which driving source is asserting analog AGC gain reduction the analog envelope detector or the digital to analog converter This mechanism allows software implementation of both manual gain control and slower analog AGC decay rates Another function enabled by this circuit arrangement useful in narrowband detection modes is DSP correction of analog AGC action caused by strong signals located outside the digitally implemented selectivity bandwidth Because the analog AGC detector samples the entire 300 kHz analog IF bandwidth some signals causing AGC action may be invisible to the DSP when narrow selectivity filtering partially implemented in a AD6620 Digital Down Converter precedes the digital detection algorithm information provided to the DSP by the AGC ANALOG and DIGITAL outputs allow the software to identify and compensate for the effects of these strong out of band signals As a result signal strength calculation and overall AGC action is based only on those signals that are inside the chosen selectivity bandwidth Fast Medium and Slow AGC modes with fixed p
27. e use Remove the packing material from the top of the unit and lift the RX 400A Receiver free of the carton Next remove the clear plastic bag from the unit Inspect the unit for external damage with particular attention to dents or bent sheet metal Also inspect front panel components and rear panel connectors for damage If external damage is evident then remove top and bottom covers of the RX 400A Receiver by removing multiple screws along the cover edges then inspect all the internal assemblies for damage such as cracked circuit cards or broken or loose components DO ATTEMPT TO OPERATE THE EQUIPMENT IF INTERNAL DAMAGE IS NOTED Upon finding any damage contact the shipping agent and contact the TEN TEC factory to arrange for unit repair 3 2 MOUNTING The RX 400A may be mounted as a single unit or side by side with another 2U half rack piece of equipment in a standard EIA 19 rack enclosure For single unit rack installation please contact TEN TEC to secure the correct rack mount kit For most common mounting arrangements the RX 400A will be installed side by side with another RX 400A Receiver or companion RCU 400A Receiver Control Unit to fill a 2U rack opening Side by side mounting is accomplished by using the RM 400 2 Rack Mount Kit The RX 400A has 3 threaded inserts on each side of the chassis to accept 10 32 x 0 50 long screws for use with customer furnished chassis slides The hole pattern is compatible with Jonathan model 375Q
28. ecking channel activity after moving to a new frequency or channel This time is necessary to allow the AGC system to settle down so an accurate measure of channel activity can be made Factory defaults to 50ms 7 21 Disable Multi Addressing Switch Override 01 Format Set command lt gt Not applicable Description This command disables the Multi addressing override mode The firmware will set clear multi addressing mode via Dip Switch SW1 switches 4 8 If all the switches are set to the ON position multi addressing is disabled and the unit will respond to all commands If the dip switches are set to any other position multi address mode is enabled and the unit will respond only to commands that have the binary address selected via the dip switches of the unit Switch 4 MSB Switch 8 LSB Enable Multi Addressing Switch Override U2 Format Set command U2 lt cr gt Get command Not applicable Description When this command is received the multi addressing mode is ignored and all the units connected on the serial or Ethernet bus assumes non multi addressing mode The units will respond to all commands until they have been reset via the C9 command power reset or the Ul command Mission Download 0 Format Set command 0 lt gt Not applicable Description Command set passed from system host workstation thro
29. electable 5 or 12 volts for the cooling fan depending on application requirements PN 74446 5 7 6 0 FIRMWARE LOAD AND UPDATE PROCEDURES 6 1 INTRODUCTION The RX 400A Receiver is delivered from the factory with operating firmware installed While the firmware is the latest version available at time of manufacture updates may become available at the time of Receiver installation or periodically over the life of the equipment Firmware is available from the TEN TEC Inc by contacting the factory 6 2 REQUIRED APPLICATION TOOLS To load firmware updates into the RX 400A Receiver requires the TEN TEC Flash Update Utility tool This tool is available by contacting the factory Upon receipt load the utility onto the desktop screen of the laptop or PC This update utility will run on Windows 2000 XP or Vista operating systems The RX 400A firmware updates are loaded via the Receiver s USB port Loading the firmware requires a USB to Serial Converter driver installed in the laptop or PC being used to perform the download This driver is available on the Internet at FDTIchip com Click on Drivers and select VCP Driver version 2 0 6 00 Download and install this driver into the laptop or PC 6 3 FIRMWARE LOAD UPDATE STEPS To load firmware into the RX 400A Receiver perform the following steps 1 Turn RX 400A power to OFF With reference to paragraph 3 7 of this manual place the 1 switch of the left hand Configuration Dip Switch sec
30. erface to the Receiver is via rear panel connectors for power RF input IF outputs line audio output external reference input and remote control The rear panel also contains a dip switch to set the receiver configuration to operational or firmware update modes 2 1 PN 74446 Figure 2 2 400 Rear Panel View The RX 400A contains separate signal paths for HF and VHF UHF frequency bands The HF section covers the 100kHz to 88 MHz range The VHF UHF front end covers the range from 88 MHz to 3000 MHz A single RF input connector is used to cover both ranges Internal firmware commands automatically switch between the HF and VHF UHF pre selector sections based on tuned frequency During HF operation signals entering the HF converter section first pass through a user adjustable step attenuator to enhance receiver performance by reducing interference caused by receive overload in the presence of extremely large signal levels encountered in the HF frequency domain The attenuator is followed by multiple pole RF filters pre selector to eliminate potential interference from out of band signals For VHF UHF operation the received signals are routed to the high band pre selector which contains switched filter sets to cover sub octave ranges between 88 and 3000 MHz For other than U S Government U S Military or approved foreign government use the RX 400A will not provide coverage of the various cellular telephone bands The 2 Receiver IF out
31. f every 5 seconds for the unit to continue to send rip packets via ethernet Format Set command El lt cr gt Get command Not applicable Definitions Set Ethernet IP Address E2 Format Set command E2AAA lt dot gt BBB lt dot gt CCC lt dot gt DDD lt cr gt Get command 2 lt gt Response EZAAA lt dot gt BBB lt dot gt CCC lt dot gt DDD lt cr gt Definitions 1 octet of the IP address Range 0 255 2 octet of the IP address Range 0 255 CCC The 3 octet of the IP address Range 0 255 DDD The 4 octet of the IP address Range 0 255 The octet addresses can be specified using 1 2 or 3 digits If less than 3 digits are specified for the octet address character lt 0x2E gt must sent between the octets to differentiate between address values 7 10 Set Base Port Format Set command EINNNNN lt cr gt Get command lt gt Response ESNNNNN cer Definitions This command will set the 5 digit UDP port value for the radio NNNNN valid range 0 65520 Set Gateway Router IP Adress E4 Format Set command E4AAA lt dot gt BBB lt dot gt CCC lt dot gt DDD lt cr gt Get command E4 lt cr gt Response E4AAA lt dot gt BBB lt dot gt CCC lt dot gt DDD lt cr gt Definitions 1 octet of the gateway IP address Range 0 255 BBB The 2 octet of the gateway IP address Range 0 255 CCC T
32. he 3 octet of the gateway IP address Range 0 255 DDD The 4 octet of the gateway IP address Range 0 255 The octet addresses can be specified using 1 2 or 3 digits If less than 3 digits are specified for the octet address dot character lt 0x2E gt must sent between the octets to differentiate between address values Disable Ethernet Communications Port E5 Format Set command 5 lt gt Get command Not applicable Definitions This command will disable Ethernet communications Enable Ethernet Communications Port E6 Format Set command K6 lt cr gt Get command Not applicable Definitions This command will enable Ethernet communications Tune Frequency F1 The command allows the tuned frequency of the RX 400A to be set to any value between 100kHz and 3 Gigahertz in 1 Hz increments Format Set command FIFFFFFFFFFF lt cr gt Get command 1 lt gt FIFFFFFFFFFF lt cr gt Definitions FFFFFFFFFF Selects the frequency to tune in hertz entered as10 ASCII decimal format Leading zeros can be omitted Range 2 MHz to 3 GHz Example To tune a frequency of 235 67 MHz the value 235670000 will be entered To tune a value of 2 MHz 2000000 can be entered Start End Frequency F2 This command is used to select the start and end frequency range for P SCAN mode which allows the radio to search for activity in a given f
33. he RX 400A weighs 10 25 Ibs 4 65 kG Figure 2 5 depicts a 3 view drawing for the RX 400A Receiver 2 6 PN 74446 MOIA VOOP XU MAIA Adis 3015 H3d WOIdAL LNO MJ 404 00 lt 7 RX 400A RECEIVER 3 VIEW DRAWING FIGURE 2 5 PN 74446 257 2 5 ELECTRICAL Power requirements for the RX 400A are presented in Table 2 3 TABLE 2 3 RX 400A POWER REQUIREMENTS Parameter Specification Line Voltage 90 to 264 VAC Frequency 48 440 Hz single phase Power Consumption 36 Watts nominal Power Connector Circular MS type connector 3 pin male Spikes and Noise Designed to meet MIL STD 704 but not tested at factory Power Connection Pin A AC High Pin B AC Low Pin C AC Ground RF Input 100kHz 3000MHz Phones 1 Phones 2 IF 1 21 4 MHz Status Indicators 400 HF VHF UHF IF2 214 MHz RECEIVER Volume Control External Reference Line Audio Power Switch 90 260 VAC Power 2 8 PN 74446 3 0 PREPARATION FOR USE AND INSTALLATION 3 1 5 Examine the shipping carton for damage before unpacking the unit If the carton is damaged attempt to open it in the presence of the shipping agent If this is not possible then document or photograph the carton damage for a matter of record If undamaged then retain the carton and packing material for futur
34. hen scanning S removes the specified channel from the memory list when scanning 7 18 Start Halt Pause Resume Memory Scan P4 Format Set command P4X lt cr gt Get command Not applicable Definitions X lt S gt start scanning for activity on pre programmed memory channels The receiver will use the specified channel range via command P4 If no range has been specified using command P4 the valid channel range will be from 0 999 NOTE if no channels are found to be programmed an error will be returned when the 5 is transmitted to start scanning NOTE the time between scanning uses the time set in the Gaze Time T3 command lt H gt halts or stops program scanning and returns to manual mode The receiver will remain tuned to the channel it is currently set to when receiving this command lt P gt pauses channel scanning if currently in scan mode Ignored if receiver not currently in scan mode lt R gt resumes channel scanning if currently in paused mode Ignores this command if not currently in paused mode Squelch Notes Unlike HF receivers VHF UHF receivers need noise squelch window squelch and signal level squelch It is not sufficient to rely on carrier to noise ratio alone to determine if Signal is present in a channel Set Signal Strength Squelch S1 Format Set command SILLL lt cr gt Get command 281 lt gt Response S1LLL lt cr gt Definition
35. ich to delete the lockout frequency value that is stored there 0 49 Add Lockout Frequency Range F8 Format Set command F8NNSSSSSSSSSS lt dot gt EKEZEEEEEEEE lt cr gt 1 Get command lt gt 1 Response F8NNSSSSSSSSSS lt dot gt EEEEEEEEEE lt cr gt Definitions NN specifies the record number 0 24 Note If NN value is 00 the radio will respond with all the record numbers and values that are programmed in the following format F8NNSSSSSSSSSS lt dot gt EEEEEEEEEE lt cr gt F8NNSSSSSSSSSS lt dot gt EEEEEEEEEE lt cr gt 1 F8NNSSSSSSSSSS lt dot gt EEEEEEEEEE lt cr gt SSSSSSSSSS Specifies the starting frequency for the lockout range entered in ASCII decimal format Leading zeros can be omitted but lt dot gt character must be transmitted to differentiate between the leading frequency and the ending frequency values Range 0 3Ghz 7 14 Specifies the ending frequency for the lockout range entered ASCII decimal format Set Attack Rate G1 Format Set command GINNNN lt cr gt Get command 1 lt gt Response GINNNN lt cr gt Definitions NNNN Valid range 0001 9999 in ASCII decimal format Leading zeros can be omitted The attack rate is used in automatic gain control AGC to select the rate to raise the volume for weak signals to try to maintain an approximately constant average output level of varying signal levels Set Dec
36. ion functions These interconnected modules are the FIRST SECOND and THIRD CONVERTERS and the FIRST SECOND and THIRD LOCAL OSCILLATORS Signal interconnection between modules is by miniature semi rigid coax Two interconnected PRESELECTOR BOARDS located on the top foldout chassis deck perform frequency band pre selection and signal pre amplification between the antenna input and the FIRST CONVERTER module The DSP BOARD located on the inner chassis deck performs all digital signal conditioning detection algorithms and logic control functions The DSP BOARD also contains the audio video output amplifiers and the TCXO master frequency reference Distribution of control signals and power to the various radio modules and boards is via connectorized ribbon cable between the DSP BOARD and the target board module All DC power is supplied by a shielded universal AC input switching supply located on the inner chassis deck The DSP BOARD receives the outputs from this main power supply for post regulation and distribution to the other radio modules front mounted fan supplies forced air ventilation Cooling air enters at the front mounted filter and exits through vent holes around the rear perimeter of the chassis The front panel board provides both high speed and low speed fan connections To change fan speed from fast to slow see paragraph 9 5 of this manual 5 2 CIRCUIT DESCRIPTIONS The rear panel antenna input is protected by a spark gap
37. ived frequencies of 88 MHz to 3GHz and double conversion when tuned below 88 MHz The IF output bandwidth is 6 MHz for tuned frequencies of 20 MHz to 3 GHz and 2 MHz when tuned below 20 MHz receive frequency Tuning step size is 10 kHz 1 kHz optional at the 21 4 MHz IF output Conversion gain from antenna to IF output is 3 dB nominal The block diagram in Figure 5 1 outlines the signal path and major functions throughout the RX 400A architecture The 21 4 MHz 3rd IF is bandpass filtered to 300 kHz bandwidth in the 3RD CONVERTER module AGC leveled and presented to the DSP board On the DSP board a high speed A D converter drives an AD6620 Digital Down Converter which applies fine tuning further bandpass filtering and decimation to the digitized IF signal to prepare the data for a Digital Signal Processor Final selectivity filtering and mode specific detection functions are accomplished by the DSP Audio Video outputs are available via connectors on either rear or front panel The outputs are designed for a nominal 600 ohm load NEZ WBIF 1 Second Converter L WBIF 2 ow Bang RF Input 4090 MHz First Converter Prestlecto 2 117 119 214 IF 1 LO 9 MHz Ext Ref AUDIO COMMAND amp STATUS DATA COMMAND amp STATUS DATA FIGURE 5 1 400 BLOCK DIAGRAM 5 1 PN 74446 Six modules located on bottom chassis deck accomplish the analog frequency convers
38. lterized installations shipboard service and cabin class turbo prop jet aircraft if appropriate shock and vibration isolation is provided The RX 400A is a COTS product and as such is not certified to MIL STD 810 standards however the unit is designed to meet shock and vibration levels associated with procedure 514 for cabin class aircraft environments With regard to RFI EMI the RX 400A is designed to meet although not factory tested to MIL STD 461F for 2 501 RS02 RSO3 The 400 is designed to operate under the conditions in Table 2 2 TABLE 2 2 ENVIRONMENTAL CONDITIONS Parameter Specification Operating Temperature 0 to 50 degrees C full specification Operating Limits Functional 10 to 60 degrees 40 to 85 degrees 10 9596 without condensation 15 000 feet MSL un pressurized 2 4 MECHANICAL The RX 400A Receiver is housed in a standard 2U high EIA half rack chassis It has a behind the panel depth of 16 00 inches 407mm excluding connectors Construction is all aluminum with wrapped corners and a thick front panel to accommodate rack mounting and bottom covers are affixed using flat head screws 10 32 threaded inserts are installed in the chassis sides to accommodate user slides The rear panel has a 10 32 threaded insert to accept a chassis ground connection The chassis is chem treated to resist corrosion and the front panel is painted gray with black silk screening T
39. model numbers RX 400A Model VER lt 0x20 gt XXXX lt 0x5f gt 400 lt cr gt Note XXXX represents 4 digits that will increment h Fi Format Set command Not applicable Get command 212 lt gt Response lt gt Definitions This command will report the firmware version number The following strings are defined and will be reported for the specific unit model numbers RX400 model 7 16 lt 0 20 gt lt 0 5 gt 400 lt gt Note XXXX represent 4 digits that will increment with each Firmware version release Unit Serial Number 13 Format Set command Not applicable Get command 213 lt gt Response 1355555555 lt gt Definitions This command will report the serial number assigned to each unit by Ten Tec The following format is defined To be determined Extended Firmware Info I4 Format Set command Not applicable Get command 214 lt gt Response to be determined Store To Memory Channel PO Stores current operating Frequency and Detection Mode to the indicated memory channel Format Set command POnnn lt cr gt Get command POnnn lt cr gt reports contents of memory channel without recalling the data Definitions 1 n 3 digit memory channel 0 to 999 7 17 Store Current Parameters Memory Channel P1 Format Set command P1CCCBBMSSRFFFFFFFFFF lt cr gt 1
40. nd control system In addition top the DSP processor the system includes an Analog Devices AD6620 digital down converter a 16C500 RS 232 UART 10 100 Ethernet interface chip FLASH memory components an A D and a D A System bus management and I O are contained in a Xilinx Programmable Logic Device PLD An AD6620 down converter accepts the 3 IF signal via a coax connector The 3 IF center frequency is 21 4 MHz The Digital down Converter DDC comprised of two A D converters converts the signal to base band for further processing inside the DSP The sample rate between the AD6620 and the DSP is dependent on the selected IF bandwidth During power up the DDC is initialized via its parallel control interface After initialization of the DSP processing system the DDC is controlled via the serial control interface The DSP processor provides user control through USB or Ethernet Interfaces Digital audio is provided on the Ethernet Interface only Please see the RX 400A Control Interface Command Set in Chapter 7 of this manual for command interface details 5 2 10 Power The system power supply delivers 12 and 5 to the Logic DSP board an on board connector On board power regulators provide the proper 1 2 and 43 3 volt supply for the DSP core and I O system Additional regulators develop 24 and 9 volts which are provided to other boards via the same ribbon cables which provide control and monitoring A connector provides a user s
41. ns N 1 or 0 where 1 turns the attenuator on and 0 turns attenuator off Where 1 20dB and 07 0dB BITE System Self Test B B2 B3 Initiates the BITE process When completed the system will report PASS or FAIL Format Set command Bn lt cr gt 1 The system will run internal diagnostics and report PASS or FAIL Definitions N 1 2 or 3 Store Memory Channel Stores current operating Frequency and Detection Mode to the indicated memory channel Format Set command COnnn lt cr gt Definitions 1 n 3 digit memory channel 0 to 999 7 5 Set Manual Attenuation Sets the amount of AGC attenuation to apply Adjusts from 000 120 dB range with 0 10 dB resolution Can be set in any mode Receiver gain is reduced and AGC threshold is increased by the number of dB indicated Format Set command lt gt Get command 1 lt gt Response C1AAAD lt cr gt 1 Definitions AAA 000 120 represents the amount of attenuation in db Range 000 120 D represents 10 resolution for the attenuation Example 107 8 dB attenuation will be entered as 1078 Decimal point is not allowed BFO C2 Format Set command C2nnnn lt cr gt Get command C2nnnn lt cr gt Definitions For CW detection mode operations The Beat Frequency Oscillator BFO capability is available The BFO is adjustable over a 8192 Hz range in 1Hz steps The BFO frequency
42. ommand headers and arguments Command headers consist of a two character letter digit mnemonics All queries consist of a question mark followed by a command header All set commands consist of an asterisk followed by a command header 7 4 TERMINATORS FOR COMMANDS AND QUERIES Terminators are used to signal the end of a command or string When a properly formatted message is ready to be sent a CR carriage return character should be entered The CR character instructs the receiver to process the preceding messages The RX 400A also transmits a terminator when responding to queries After the query response is transmitted the receiver issues a CR carriage return indicating the end of the response 7 2 PN 74446 7 5 FORMATS OF QUERY RESPONSES The RX 400A transmits responses to queries in a fixed field format Query responses begin with the letter digit mnemonic of the query in upper case characters followed by an alphanumeric argument Numeric arguments are represented by the least number of digits possible while still representing the entire range of the value If a negative value is allowed for the argument a positive or negative sign is always given Multiple responses to a query are valid but are separated by a CR character 7 6 CONTROL PARAMETERS Various receiver parameters can be controlled and or monitored over the USB or Ethernet interface See Table 7 2 below for supported control commands Note All commands are 2 A
43. ove 88 MHz It also contains the first mixer for receive frequencies below 88 MHz Each mixer selected by a switch drives a common 140 MHz IF amplifier Switches select an IF filter of either 6 MHz bandwidth for receive frequencies above 20 or 2 MHz bandwidth for use below 20 MHz PN 74446 5 3 The input Mid Band High Band first IF frequencies of 2440 1090 MHz are mixed with fixed Second LO injection frequencies of 2300 or 950 MHz respectively Each injection signal is provided by the SECOND LOCAL OSCILLATOR module which is filtered and amplified then applied to the LO port of the mixer On Low Band the LOW BAND PRESELECTOR board supplies the100 kHz 88 MHz signal to the RF port of HF Mixer The Low Band injection signal is developed in the FIRST LOCAL OSCILLATOR module by dividing a 2272 3648 MHz VCO by 16 to produce 142 228 MHz in 250 kHz steps This frequency divided first LO is routed through the FIRST CONVERTER module then applied to the LO port of the HF mixer The 140 MHz IF output from a switch is low pass high pass filtered then amplified and routed to the THIRD CONVERTER module 5 2 5 Third Converter In the THIRD CONVERTER module the third mixer is for receive frequencies above 88 MHz Mid High bands and acts as the second mixer for receive frequencies below 88 MHz Low Band The LO injection signal developed in the THIRD LOCAL OSCILLATOR module tunes a 2 MHz range from 117 71 to 119 7 MHz in 10 kHz steps
44. power were removed The ASCII string RADIO START will be transmitted by the radio when reset is complete Load EEprom Defaults D1 Format Set command D1PPPPP lt cr gt Get command Not applicable Definitions is the 5 ASCII digit pass code that must be entered to download default values to EEprom and is defined as 12461 This command will load all defaults settings to EEPROM A valid five character password must enter with this command before the command will be accepted NOTE This command could take up to 10 seconds to complete The user should wait for the ASCII string RADIO START that will be transmitted by the radio when the download is complete AGC Dump D2 Format Set command 02 lt gt Get command Not applicable Definitions This command will terminate the current AGC state and refresh the AGC system This will cancel HANG or DECAY in process This is most effective for canceling a long AGC recovery delay that may be suppressing the receiver gain and reducing sensitivity 7 9 Stop Ethernet Audio EO This command stops the transmission of RIP Radio over IP audio via Ethernet UDP protocol Format Set command 0 lt gt Get command Not applicable Definitions Start Ethernet Audio Rip E1 This command starts the transmission of RIP audio ethernet packets This command must be sent out a minimum o
45. puts WBIF 1 and WBIF 2 provide wideband IF signals for use with auxiliary analysis equipment such as IF pan signal monitors and IF Tape converters The IF center frequency is 21 4 MHz with a bandwidth of 2 MHz below a tuned frequency of 20 MHz From a tuned frequency of 20 to 3000 MHz the IF bandwidth is 6 MHz 2 2 PN 74446 RX 400A contains two 2 command and control ports an Ethernet RJ 45 connector and a standard USB connector Both interfaces support the same command set with the exception of the digital audio streaming which is only available on the Ethernet IP interface Generally the USB interface is used as the firmware update port or for connection to an external host PC for receiver control using the optional GUI package while the Ethernet interface is used for connection to the RCU 400A Receiver Control Unit for control status and audio streaming This port can also be used for connection directly to a host PC with the added benefit of audio streaming capability providing the host has the optional GUI software installed Internal RX 400A receiver firmware establishes the operating features and parameters such as tuned frequency gain AGC mode IF filter bandwidth detection mode BFO and all the functions associated with frequency and memory channel scan modes This firmware can be updated in the field using a laptop computer or the system host PC workstation with the appropriate drivers See Chapter 6 for details
46. re determined attack and decay times are provided along with a Programmed AGC mode where the operator can select the attack hang and decay times in milliseconds 5 2 6 First Local Oscillator The FIRST LOCAL OSCILLATOR module contains a single loop fractional N frequency synthesizer producing 2272 4090 MHz in 2 MHz steps Serial data from the DSP board configures synthesizer to divide the provided 100 MHz reference by five and the selected VCO by a MODULO 10 fractional N number of 113 6 to 204 5 for phase comparison Integrated phase pulses from the synthesizer chip develop a DC tuning voltage for the active VCO The tuning voltage output is sampled and delivered to the DSP board for possible charge pump gain calibration based on VCO tuning voltage slope variation loop filter reduces reference and phase correction ripple on the tuning voltage before it is applied to the VCO control input The active VCO output selected by a switch splits to two buffer amplifiers amplifier provides feedback to synthesizer chip completing the loop The second amplifier develops the Mid High Band First LO output which splits between the module output and MODULO 16 divider to provide the Low Band First LO of 142 228 MHz The 100 MHz master frequency reference signal is developed on the DSP board and is delivered through this module to the SECOND LOCAL OSCILLATOR module PN 74446 5 5 5 2 7 Second Local Oscillator The SECOND LOCAL OSCILLATOR mod
47. requency range Format Set command F2SSSSSSSSSS lt dot gt EEKEEEEEEE lt cr gt Get command F2 lt cr gt Response F2SSSSSSSSSS lt dot gt EEEEEEEEEE lt cr gt Definitions SSSSSSSSSS Selects the starting frequency in hertz The value entered in 10 ASCII decimal format Leading zeros can be omitted but the lt dot gt character must be transmitted to differentiate between the start and end frequency values Range 100kHz 3 GHz Selects the ending frequency in hertz The value entered in 10 ASCII decimal format Leading zeros can be omitted Range 100kHz 3 GHz 7 12 Start Halt Pause Resume Frequency Scan F3 Format Set command lt gt Get command 2 lt gt Response lt gt Definitions X lt S gt start programming frequencies for the specified range using command F2 If no range has been specified using command F2 the receiver the valid range will be from 0 3Ghz in 1hz increments if no step size is specified via command F5 If command F5 has been received the receiver will use the step size specified in that command lt gt halts or stops frequency scanning and returns to manual mode The receiver will remain tuned to frequency it is currently set to when receiving this command P Scanning will pause scanning if currently in scan mode This command is ignored if not currently in scan mode R resumes frequency scanning if currently in pau
48. rnet interface provides audio streaming from the receiver to a RCU 400A Receiver Control Unit or PC or any device that can process variable sample rate PCM data delivered via UDP packets 7 2 USB INTERFACE DESCRIPTION The RX 400A Digital HF VHF UHF Receiver has the built in capability of being controlled remotely by a computer or other controller that is equipped with a USB interface or an Ethernet port and capable of transmitting and receiving ASCII standard encoded characters A baud rate hardware configuration can be selected via switches 2 and 3 of the Configuration DIP switch The USB interface of the RX 400A is physically implemented on a rear panel standard USB connector This interface has a full duplex operation meaning that it can transmit and receive data simultaneously The baud rates are selectable via configuration dip switches SW2 and SW3 Refer to Table 7 1 1200 9600 19200 57600 default Table 7 1 Baud Rate Switch Settings The RX 400A is set up with a fixed data word frame format consisting of ten bits and comprised of the following one start bit eight bit character no parity one stop bit An example illustration of the fixed data word format is shown below Bit 7 Stop 7 1 It is important serial data transmissions that the receiving device knows when data is being transferred and when data being transferred is about to stop This information is
49. s LLL the level that will be compared to the current signal strength level used to determine if a valid signal is present If the current signal strength is found to be less than this value the signal is found to be invalid and the audio will be muted Valid ranges 0 127 Leading zero s can be omitted 7 19 Current Signal Strength S3 Format Set command Not applicable Get command 253 lt gt Response S3NNN lt cr gt NNN Current measurement of signal strength Valid ranges 0 127 This command will report the current signal strength value that is updated in the firmware This is the value that is compared to the squelch level set in the 51 command If this value goes below the squelch level the audio will be muted Squelch Status S4 Format Set Command Not applicable Get command S4 lt cr gt Definitions TBD Dwell Timer T1 Format Set command TITTTTTTTT lt cr gt Get command T1 lt cr gt Response TITTTTTTTT lt cr gt 1 Definitions TTTTTTTT represents the time in ASCII decimal format Value number of milliseconds Valid ranges are 0 99999999 The dwell time feature sets the duration of time the receiver will remain on an active channel An infinite dwell time can also be selected Setting the Dwell Time to 0 activates the INFINATE DWELL which forces the radio to remain on the frequency or memory channel as long as it is active SQUELCH open 7
50. sed mode Ignores this command if not currently in paused mode Frequency Step F5 Sets the step size of frequency scan 1 Hz steps in P SCAN mode Format Set command FSFFFFFFFFFF cr Get command 2 5 lt gt Response F5FFFFFFFFFF lt cr gt Definitions FFFFFFFFFF Selects the step size in hertz entered in ASCII decimal format Leading zero s can be omitted Range Hz 3 GHz 7 13 Lockout Frequency F6 Format Set command F6NNFFFFFFFFFF dot BBBBBB cr Get command F6NN cr Response FONNFFFFFFFFFF lt dot gt BBBBBB lt cr gt Definitions Specifies the record number where the lockout frequency 15 stored Valid record numbers 0 49 Note If NN value is 00 the radio will respond with all the record numbers and values that are programmed in the following format F6NNFFFFFFFFFF lt dot gt BBBBBB lt cr gt F6NNFFFFFFFFFF lt dot gt BBBBBB lt cr gt F6NNFFFFFFFFFF lt dot gt BBBBBB lt cr gt etc FFFFFFFFFF specifies the 10 digit ASCII decimal frequency value to lock out when tuning Leading zeros can be omitted but the lt dot gt character must be transmitted to differentiate between the frequency and the bandwidth values BBBBBB specifies the 6 digit ASCII decimal bandwidth to add subtract from the specified Delete Lockout Frequency F7 Format Set command F7NN lt cr gt Get command Not applicable Definitions Specifies the record number in wh
51. t distortion and that audio outputs are present It is also useful to check for proper operation of manual tuning F1 F2 scan mode and memory channel scan mode along with RF gain squelch and BFO function Since the RX 400A is a blank panel no manual controls unit it is anticipated these checks will be made using the companion RCU 400A Receiver Control Unit Fault isolation is also accomplished using the RCU 400A Receiver Control Unit This is done by depressing the RCU Menu Key and scrolling through to the RX BITE screen The BITE routine checks the RF to IF to Audio paths as well as communication between the RX and RCU The indication is either PASS or FAIL Instructions are provided in the RCU 400A User Manual 9 5 FAN SPEED The fan speed may be changed by the end user The factory default is Fast change the fan speed to Slow first disconnect the AC power cord then remove the fan bezel and filter element as in paragraph 9 2 above Then remove the four 4 screws securing the fan to the front panel and let the fan lay on bench surface by its leads Looking through the fan opening in the front panel there is a 3 pin connector plugged into a 4 pin circuit board connector on the left hand side that connector is plugged into the forward most 3 pins With needle nose pliers gently lift up the connector off the 3 forward pins and move backwards and pug onto the rear most set of 3 pins This is the Slow speed fan position Repl
52. t side of the toggle switch toward the front panel A built in red lamp will illuminate to indicate power has been applied 4 2 HEADPHONES VOLUME The headset audio level may be adjusted by rotating the VOLUME control minimum at full CCW position full volume at full CW position 4 3 STATUS INDICATORS Three LED indicators are provided to indicate the operating status of the Receiver The green DATA LED blinks or is on steady when data is being transferred to from the Receiver to the RCU 400A Receiver Control Unit or host PC The yellow LINK LED is on when the link between the Receiver and an external device has been established The SRQ LED illuminates when service requests are received Refer to Figure 2 1 for the Receiver front panel component locations NOTES 1 Full receiver operation descriptions for Manual Tuning F1 F2 Frequency Scan and Memory Channel Scan modes as well as other control parameters such as Gain Control Squelch Bandwidth Detection Mode BFO and AGC is provided in the RCU 400A Receiver Control Unit User Manual 2 Directed Search using host workstation loaded optional software package provides Mission Download capability via the RCU 400A Receiver Control Unit PN 74446 41 5 0 5 1 OVERVIEW The Ten Tec model RX 400A is a DSP based receiver with a wide band IF output available at 21 4MHz The superhetrodyne architecture is triple conversion to the IF output for rece
53. ting If programmable mode is selected the radio will use the value entered via the G1 G2 and G3 Set Attack Decay and Hang Rate command Detection Mode C7 Format Set Command C7M lt cr gt Get Command 7 lt gt Definitions lt gt lt U gt USB lt L gt LSB lt C gt CWU lt W gt CWL lt gt lt K gt FSK The detection mode command determines how the signal is to be demodulated The Receiver Supports AM USB LSB CWU CWL FM and FSK detection modes Memory Recall C8 Format Set command C8nnn lt cr gt Get command C8nnn lt cr gt Where nnn is value between 0 and 999 Definitions Command used to recall memory channel contents If memory empty then no action is taken Format Set command C7M lt cr gt Get command 7 lt Response 7 lt gt Definitions M lt gt lt U gt USB lt L gt LSB lt C gt CWU lt F gt FM lt W gt CWL lt gt FSK The detection mode command determines how the signal is to be demodulated The receiver supports AM USB LSB CWU FM CWL FSK detection modes The detection mode will be selected for the current frequency selected by the receiver AUTO MODE Software Reset Reboot Unit C9 Format Set command C9 lt cr gt Get command Not applicable Definitions This command will perform a soft reboot to the receiver The unit will be initialized as if the
54. tion to the down position Connect a USB cable from the Receiver USB connector to a USB port on the laptop or PC Turn the Receiver power ON Click and open the Update utility icon on the laptop or PC desktop Click Settings then click Setup On the setup window check the serial port box Select the COM port you want to use Note the IP address UDP port and radio pass code entries Click OK PN 74446 6 1 e Eo gor m e Firmware Load Update Steps cont d Now click Process on the Flash Utility window Click on Update Radio A select Firmware Update File window appears Select Look In Desktop Scroll down through the listing until the desired file is located Highlight the file then click Open The load preamble text will be displayed then the Erase steps will occur and the firmware will then load 4096 lines of new firmware code Upon completion of download a successfully loaded window will appear Close the application Place the Receiver power to OFF Disconnect the USB cable Return the 1 configuration switch to the UP position Turn Receiver power ON This concludes the firmware update procedure PN 74446 6 1 7 0 RECEIVER CONTROL 7 1 INTRODUCTION This chapter describes the RX 400A control interfaces and the associated command set All features of the Receiver are controllable through the interfaces In addition the Ethe
55. ugh RCU 400A to 400 to set fstart fstop fstep filterBW detection mode rfgain squelch AGC mode attack decay hang gaze dwell deadtime memory channel group lt cr Where CC Mission Memory Channel and MT Memory is range C channel Example M01 02 R 0088000000 0108000000 0000100000 10 0 040 99 88 77 10 50 90 21 7 22 8 0 AUDIO STREAMING 8 1 RADIO OVER IP RIP DATA FORMAT RIP is the system by which the RX 400A provides real time streaming audio The RIP packets are sent from the radio via standard UDP packets With each UDP packet containing a descriptive header and audio data block The RIP UDP Packet is based on the Real Time Protocol RTP RTP is the format utilized by various commercial Voice Over IP systems The format of the data packet used for RIP is as follows Octet 0 Header Information 0x80 RTP Format Octet 1 Header Information Continued 0x50 Octet 2 3 RTP Sequence Oxnn Packet Counter last 1 used for verification of service Octet 4 7 RTP TimeStamp Oxnn Oxnn Time Counter last 64 Octet 8 11 RTP Sync Source 0x45 ID of the Radio last 4 MAC digits The above octets were arranged so that a third party program that supports RTP audio protocol could already use the packets from the RX 400A Additional header information is included that is specific to the RX 400A Octet 12 15 Sampling Frequency 0x00 Oxmm Oxnn
56. ule contains a single loop fractional N frequency synthesizer producing a fixed frequency of 2300 or 950 MHz Serial data from the DSP board configures the synthesizer to divide the provided 100 MHz reference by 5 or 10 and the selected VCO by a MODULO 10 fractional N number of 115 0 or 95 0 for phase comparison Integrated phase pulses from the synthesizer chip develop the DC tuning voltage for the active VCO A loop filter reduces reference and phase correction ripple on the tuning voltage before it is applied to the VCO control input The active VCO output selected by a switch that drives the module output through a buffer amplifier A sample of the output provides feedback to the synthesizer chip completing the loop The 100 MHz master frequency reference signal from the FIRST LOCAL OSCILLATOR module is delivered through this module to the THIRD LOCAL OSCILLATOR module 5 2 8 Third Local Oscillator The THIRD LOCAL OSCILLATOR module contains a single loop integer N frequency synthesizer driving an N 1 mixing loop to develop a 117 71 to 119 7 MHz output tuning in 10 kHz or optionally 1 kHz steps Serial data from the DSP board configures the synthesizer to divide the provided 100 MHz reference by 250 or optionally 2500 and VCO by 1771 to 1970 or optionally 17701 to 19700 Additional circuitry modifies the nominally 400 kHz loop filter for the optional 40 kHz reference frequency when the fine tuning option is selected The VCO delivers 7
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