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JPS RTU-292C, Инструкция по установке и эксплуатации

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RTU-292C Operations Manual 

 

        

 

 

 

 

 

5-5 

5.5.3

 

VOX SENSITIVITY MEASUREMENT 

The following test procedure measure the sensitivity of the VOX in the RTU-292C.  This is the 
amplitude of the incoming signal from the telephone line required to trigger the VOX. 

 

 

Figure 5-2 

VOX Sensitivity Test Set-Up 

5.5.3.1

 

VOX Test Procedure 

1. Disconnect the RTU-292C from all other equipment and connect the test equipment as shown 
on Figure 5-2. 

2. The PSTN level setting must be known.  To determine this, remove the top cover and note the 
positions of SW2-1, -2, and -3. 

3. Start with the following pushbuttons OFF: TEL LINE/PHONE and TEL LINE/RADIO.  Push 
the TEL VOX button ON.  The positions of the other buttons are unimportant. 

4.  Set  the  audio  signal  generator  frequency  to  1  kHz  with  an  output  amplitude  of  less  than  -
40dBm (7.7mV rms). 

5. Push the TEL LINE/RADIO button to start the adaptation cycle. 

6. When the initial adaptation cycle is complete, slowly increase the audio generator amplitude 
until the Keyed LED on the RTU-292C comes on.  The audio generator amplitude at this point 
(read directly by the audio voltmeter) is the VOX sensitivity.  The VOX trip point is dependent 
on the setting of the PSTN levels and the VOX sensitivity setting.  It should be 16 + 2 dB below 
the PSTN setting as listed in the table below: 

 

VOX Sensitivity    

        VOX Trip Point 

     MAX 

 

19 + 2 dB below the PSTN setting 

     MED 

 

16 + 2 dB below the PSTN setting 

     LOW 

 

13 + 2 dB below the PSTN setting 

     MIN 

 

10 + 2 dB below the PSTN setting 

 

 

Содержание RTU-292C

Страница 1: ...ONE INTERFACE UNIT Designed and Manufactured by JPS Interoperability Solutions Inc jpsinterop com 5800 Departure Drive Raleigh NC 27616 phone 919 790 1011 email sales jpsinterop com support jpsinterop...

Страница 2: ...mmunications Operation of this equipment in a residential area is likely to cause harmful interference in which case users will be required to correct the interference at their own expense CAUTION Cha...

Страница 3: ...concentration of the hazardous substance of at least one of all homogeneous materials in the parts is above the relevant threshold of the SJ T 11363 2006 standard Note that some of the component types...

Страница 4: ...RTU 292C Operations Manual 4 Blank Page...

Страница 5: ...MMING MODE SETUP PARAMETERS 2 6 2 8 2 SETTING TELEPHONE SEND AND RECEIVE LEVELS 2 6 2 8 3 VOX HANGTIME 2 7 2 8 4 VOX SENSITIVITY 2 8 2 8 5 BALANCED UNBALANCED RADIO INTERFACE 2 8 2 8 6 RX LINE INPUT I...

Страница 6: ...PLACING A TELEPHONE CALL 3 4 3 4 4 RECEIVING A TELEPHONE CALL 3 5 3 4 5 PUTTING A TELEPHONE CALL ON HOLD 3 5 3 4 6 USING THE HANDSET WITH THE RADIO 3 5 3 4 7 CONNECTING THE RADIO TO THE TELEPHONE LINE...

Страница 7: ...dset Phone Response 4 14 4 4 9 Handset Radio Response 4 14 4 4 10 Speaker Phone Response 4 15 4 4 11 Speaker Radio Response 4 15 4 4 12 Speed Dial Response 4 16 4 4 13 Tel Line Phone Response 4 16 4 4...

Страница 8: ...1 Initiate Call Via Attention Signal 6 5 6 4 2 RTU 292C Response to Attention Signal 6 5 6 4 3 RTU 292C Prompts for Confirmation 6 5 6 4 4 RTU 292C Places the Call 6 5 6 4 5 After the Call Begins 6 5...

Страница 9: ...2 18 FIGURE 2 3 LOCATION OF INTERNAL OPTION SETTINGS 2 19 FIGURE 2 4 INTERNAL OPTION SETTINGS DETAILS 2 20 FIGURE 2 5 AUDIO INTERFACE WIRING DIAGRAM 2 21 FIGURE 2 6 INTERFACE DETAILS 2 22 FIGURE 5 1...

Страница 10: ...2 18 FIGURE 2 3 LOCATION OF INTERNAL OPTION SETTINGS 2 19 FIGURE 2 4 INTERNAL OPTION SETTINGS DETAILS 2 20 FIGURE 2 5 AUDIO INTERFACE WIRING DIAGRAM 2 21 FIGURE 2 6 INTERFACE DETAILS 2 22 FIGURE 5 1...

Страница 11: ...d receive See also Half Duplex and Simplex Half Duplex A communications system that uses different frequencies for transmit and receive operation but cannot transmit and receive at the same time See a...

Страница 12: ...RTU 292C Operations Manual 12 This page intentionally left blank...

Страница 13: ...dapts to the phone line and the distant phone becomes part of a telephone to radio to radio communications link Once this link is established the operator may communicate with either party using the R...

Страница 14: ...Interface Board which is mounted in the Options Tray where other option boards may be installed Mounted on the front panel along with the switchboards are a speaker control potentiometers and handset...

Страница 15: ...l controls The inputs are processed and audio gates front panel LEDs audio prompts etc are controlled accordingly 1 3 1 6 Power Supply Section The power supply in the takes in DC current from either t...

Страница 16: ...200000 Handset PTT Black with coiled cord 2 0360 009000 Connector cable DB 9 receptacle 2 0650 005250 Fuse 3AG 5A fast blow 2 0827 000001 HW clamp cable for DB 9 connector 1 0827 102401 HW Telephone...

Страница 17: ...one RTU 292C Local Phone Option 5930 596000 No longer available Allows remote operation of the RTU 292C through the use of a standard telephone set connected directly to the RTU 292C Local Phone port...

Страница 18: ...ey Relay Output Low Level Relay Contacts 60VA max Switching Speed 5 msec GENERAL Handset RJ12C Jack Electret microphone dynamic receiver Dialing Modes DTMF Pulse at 10 pps Pulse Dial Make Break Ratio...

Страница 19: ...at 919 790 1011 by fax at 919 790 1456 Upon receipt of this information we will arrange for repair or replacement 2 3 RESHIPMENT OF EQUIPMENT If it is necessary to return the equipment to the manufact...

Страница 20: ...RTU 292C is connected to a battery backup there should be an approved disconnect device installed in the DC wiring in an easily accessible location If the RTU 292C is being operated from a power sour...

Страница 21: ...mounted in a standard EIA 19 wide rack by means of chassis slides may be ordered from us or on an L bracket shelf The unit weighs too much to be installed in a rack supported only by the front panel...

Страница 22: ...e Full Half Duplex SW2 8 Half Duplex RX Audio Interface JP1 JP2 600 Ohms Balanced TX Audio Interface JP3 600 Ohms Balanced Internal Audio Potentiometers R156 Ring Volume Midrange R116 RX Lvl Adj 0 dBm...

Страница 23: ...from a nominal 12 or 24 28 VDC source The 12 28 VDC position will work with 24 VDC nominal and 28 VDC nominal supplies The unit will automatically switch over to the use of the DC input when the AC s...

Страница 24: ...y are detailed in Section 3 See Table 3 2 Programming Mode DTMF Commands 2 8 2 SETTING TELEPHONE SEND AND RECEIVE LEVELS The levels of the audio signal that are sent into Send and received from Receiv...

Страница 25: ...VOX circuitry holds the radio in the keyed state for a short time after the telephone audio signal is no longer detected This delay called hangtime ensures that the VOX is not de activated between syl...

Страница 26: ...lds JP1 and JP3 set the unit for either a Balanced or Unbalanced audio interface to the radio or other four wire device connected to the J2 RADIO Connector Set the jumper plug across JP1 pins 2 3 for...

Страница 27: ...ringer volume rotate R156 clockwise to increase the volume and counterclockwise to decrease it 2 8 9 FULL HALF DUPLEX RADIO In full duplex operation the RTU 292C will simultaneously send transmit audi...

Страница 28: ...5 enables or disables the RTU 292C s password protection feature Password protection prevents unauthorized access to the system from the PSTN line when the RTU 292C is in the Automated Operation Mode...

Страница 29: ...is See Section 3 7 for an explanation of Local Phone Option operation SW1 8 enables the Local Phone Ring Through feature This causes the local phone to ring whenever a call is received by the RTU 292C...

Страница 30: ...gs must be installed at J5 pins 4 5 and pins 7 8 Option Jumpers on J10 If the Option tray is not installed a jumper must be placed at pins 13 14 of J10 This jumper allows normal operation of the unit...

Страница 31: ...connect the transmit audio to TXA only and change jumper JP3 on the Main Board to UNBAL Figure 2 5and Figure 2 6details the various audio interface options P1 pin 4 the External Signal input is used...

Страница 32: ...ere are two ways detailed below to set the transmit level First apply TX audio by one of two methods A Use a 1 kHz test tone supplied by the RTU 292C when in the Transmit Level Set Up Mode or B simply...

Страница 33: ...ely degrades the hybrid null provided by the RTU 292C This is particularly important with a full duplex system which may oscillate if too much level compression is used For best results adjust the TX...

Страница 34: ...alone and it will be necessary to adjust the audio output at the radio itself until the correct level is obtained NOTE The proper operation and excellent performance of the RTU 292C will not be obtain...

Страница 35: ...RTU 292C Operations Manual 2 17 Figure 2 1 Outline Dimensions...

Страница 36: ...DEVICE MAY NOT CAUSE HARMFUL ACCEPT ANY INTERFERENCE RECEIVED INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION INTERFERENCE AND 2 THIS DEVICE MUST RTU 292C RADIO TELEPHONE INTERFACE PO ER ON...

Страница 37: ...RTU 292C Operations Manual 2 19 Figure 2 3 Location of Internal Option Settings...

Страница 38: ...RTU 292C Operations Manual 2 20 Figure 2 4 Internal Option Settings Details...

Страница 39: ...RTU 292C Operations Manual 2 21 Figure 2 5 Audio Interface Wiring Diagram...

Страница 40: ...RTU 292C Operations Manual 2 22 Figure 2 6 Interface Details...

Страница 41: ...t Telephone Line Levels if necessary See Table 2 1and Section 0 Are other Factory Default Settings correct for this system See Table 2 1and Table 3 2 Make necessary changes as explained in Sections 0...

Страница 42: ...RTU 292C Operations Manual 2 24 Blank Page...

Страница 43: ...a PSTN line The handset earpiece audio level is controlled by the HANDSET volume control A convenient hanger for the handset may be attached to the left side of the front panel mounting screws are ins...

Страница 44: ...his LED will be on continuously indicating that the unit is ready for operation The TEL LINE OFF pushbutton will hang up any active TEL LINE RADIO or TEL LINE PHONE connection 3 2 9 HANDSET BUTTONS Th...

Страница 45: ...ng volume is independent of the SPEAKER VOLUME setting and is set internally by adjustment R156 Regardless of the position of the AUDIBLE RING button the LED indicator associated with the TEL LINE PHO...

Страница 46: ...nection or an unmanned connection can be made in the automated mode Here are some examples of RTU 292C operating modes 1 The telephone may be used to place and receive calls independently of the radio...

Страница 47: ...necessary to press the handset PTT switch to use the telephone 2 To hang up press the TEL LINE PHONE button again The adjacent LED will turn off 3 4 5 PUTTING A TELEPHONE CALL ON HOLD Once a telephone...

Страница 48: ...ve noise on the phone line and it is best to hang up and redial Because the adaptation algorithm is very robust connection to an unquiet phone line is about the only case where the RTU 292C will fail...

Страница 49: ...e speaker on the RTU 292C front using the SPEAKER PHONE and SPEAKER RADIO buttons 3 4 8 6 The call may also be monitored with the handset The operator may speak and listen to either the telephone part...

Страница 50: ...ledge tone prompt and if the Voice Prompt Option is enabled the RTU 292C Automatic Phone Patch greeting prompt Failure of the self test or failure of the DSP module at any time is indicated by a long...

Страница 51: ...he phone line for a time longer that that set by the Inactivity Timer see Table 3 1 If the unit signals that it is dropping the link due to a lack of activity either party may prevent the disconnectio...

Страница 52: ...daptation process See Section 3 7 3 4for instructions related to changing the existing password 3 7 3 3 The RTU 292C Adapts To The Phone Line The RTU 292C hardware has an Adaptive Hybrid that is contr...

Страница 53: ...the transmitter 3 7 4 PLACING A CALL IN THE COMMAND MODE When a phone call is initiated by the RTU 292C to a distant phone on the outside line and the called party picks up the phone the unit s DSP w...

Страница 54: ...om The Front Panel Keypad The RTU 292C can be operated from its front panel to allow the unit to be programmed and if so equipped control a Motorola URC 200 radio When using the front panel the operat...

Страница 55: ...Security Device Option must be installed not currently available 5 Page the Operator make a call to the RTU 292C operator at the front panel keypad handset 6 Page the Local Phone Operator this command...

Страница 56: ...ect timer based on value of x See Section 3 7 8for more information 2 0 Disabled not recommended see Section 3 7 8 2 1 2 Minutes 2 2 5 Minutes factory default 2 3 10 Minutes 2 4 20 Minutes 2 5 30 Minu...

Страница 57: ...DISCONNECT TIMER The inactivity disconnect timer ensures that the system does not remain locked up on a completed call if system users forget to or are unable to terminate a call by normal means The...

Страница 58: ...3 7 10 1 Programming the Speed Dial Directory These numbers are programmed by first putting the RTU 292C into the programming mode To enter this mode enter the DTMF command 9 9 The RTU 292C will respo...

Страница 59: ...except when queried for a phone number by the RTU 292C the radio enters the speed dial location instead of the telephone number For example to call the number stored at speed dial location six the us...

Страница 60: ...ing mode Use the DTMF Command String 8 0 0 to revert to the dial tone requirement Similarly use the programming mode to enable the auto connect feature with the Command String 8 1 1 and disable this f...

Страница 61: ...rom the RTU 292C use standard ASCII characters All remote commands are terminated with a carriage return CR and optionally a line feed LF Status information returned from the RTU 292C will always be p...

Страница 62: ...wait for a response from a given command before entering the next command Table 4 1 Command Summary Null Command CR Auto Answer Command AUTO_ANS ON OFF CR Audible Ring Command AUD_RING ON OFF CR Date...

Страница 63: ...mples AUTO_ANS ON CR Command to enable Auto Answer AUTO_ANS ON E0 CR Status returned showing that Auto Answer is on AUTO_ANS CR Command requesting the status of Auto Answer AUTO_ANS OFF E0 CR Status r...

Страница 64: ...ER may be substituted for the number In this case the call will be placed to the front panel of the RTU 292C Likewise the parameter LP may also be substituted for the number This will cause the call t...

Страница 65: ...be off hook to use this command This is done by using the DIAL command or the TEL LINE PH command Valid digits for the number string are 0 9 the characters and The comma character is used to produce...

Страница 66: ...ting the status of the Handset Phone path HS_PH OFF E0 CR Status returned showing that Handset Phone is disabled 4 3 9 Handset Radio Command HS_RAD ON OFF CR This command is to enable disable or query...

Страница 67: ...ng the status of the Speaker Phone path SPKR_PH OFF E0 CR Status returned showing that Speaker Phone is disabled 4 3 11 Speaker Radio Command SPKR_RAD ON OFF CR This command is to enable disable or qu...

Страница 68: ...s entered in place of the phone number data the speed dial location will be erased The speed dial location can be reviewed by entering a in place of the phone number The phone number may contain up to...

Страница 69: ...l Line Phone TEL_LINE_PH OFF E0 CR Status returned showing that Tel Line Phone is disabled 4 3 14 Tel Line Radio Command TEL_LINE_RAD ON OFF CR This command is to enable disable or query the current s...

Страница 70: ...he RTU 292C 01 MAR 98 11 05 20 E0 CR Status returned indicating that the date is March 1st 98 and the time is 11 05 and 20 seconds in the morning TIME 141830 CR Command to set the time to 2 18 and 30...

Страница 71: ...ata will follow the response name string There is at least one space between each data section Most data is presented in a specific order The last data section is always the response error code The er...

Страница 72: ...esponse Radio Telephone Connection Made dd MON yy hh mm ss Exx CR Type Asynchronous Response To Start of a Radio Telephone call This response indicates that a Radio Telephone call has been started The...

Страница 73: ...onse To Disconnect Command Telephone Command Disconnect System Initiated Disconnect This response indicates that the PSTN Operator or Local Phone has been disconnected Examples DISC E0 CR Status retur...

Страница 74: ...g that a radio telephone call has finished and the call lasted for 0 hours 10 minutes 25 seconds Connection dropped elapsed time 00 10 25 E0 CR 4 4 8 Handset Phone Response HS_PH ON OFF Exx CR Type Sy...

Страница 75: ...Speaker Phone path is enabled SPKR_PH OFF E0 CR Status returned indicating that the Speaker Phone path is disabled 4 4 11 Speaker Radio Response SPKR_RAD ON OFF Exx CR Type Synchronous Response To Spe...

Страница 76: ...x CR Type Synchronous Response To Tel Line Phone Command This response indicates the Tel Line Phone path status Examples TEL_LINE_PH ON E0 CR Status indicating that the Tel Line Phone path is enabled...

Страница 77: ...g 05 DEC 97 14 18 30 CR Status returned indicating that the date is December 5th 97 and the time is 2 18 and 30 seconds in the afternoon The strings representing the month are JAN FEB MAR APR MAY JUN...

Страница 78: ...re any problems with a given command Unless otherwise noted the user may assume that a non zero error code indicates that the command was not acted upon Table 4 4 Response Error Codes E0 No error E1 T...

Страница 79: ...connectors only with identical items 3 Carefully observe lead dress and component orientation when repairing circuits Keep components leads as short as possible 4 Reference to the component side of a...

Страница 80: ...ich to base the specification In actual use the hybrid balance of the RTU 292C is excellent into impedances other than 600 Ohm such as the complex impedances of the telephone lines and is far better t...

Страница 81: ...he audio voltmeter reads 6dBm 0 387V rms This sets the transmit signal output path in the RTU 292C for unity gain if the input level is correctly set 5 Adjust the RX Level Adjust R116 so that the PEAK...

Страница 82: ...ll set the average noise level into the RTU 292C s hybrid to approximately 0dBm 6 Remove the unit from Set up Mode by turning the RTU 292C Main Power OFF setting SW2 7 OFF then turning the main power...

Страница 83: ...VOX button ON The positions of the other buttons are unimportant 4 Set the audio signal generator frequency to 1 kHz with an output amplitude of less than 40dBm 7 7mV rms 5 Push the TEL LINE RADIO bu...

Страница 84: ...Excessive audio level from the radio receiver Adjust R116 the RX Input potentiometer CCW If LED still flashes too often after R116 is fully CCW lower audio level at receiver See 2 10 for audio adjust...

Страница 85: ...327104101 Cap mylar 0 1uF 10 100V C1 2 4 364010101 Conn Header 125bd 10pin retain J1 1221062201 LED rt angle pc mnt green CR1 CR2 1221062202 LED rt angle pc mnt Yel CR4 1943000003 Sw push mom 30VDC 4A...

Страница 86: ...Conn Header 7 pin single row J5 364010101 Conn Header 125bd 10pin retain J19 to Options 364016101 Conn Header Male 16 Pin retain J10 J18 J20 364040101 Conn Header 125 40 pin retain J15 364040104 Conn...

Страница 87: ...sistor carb 1 4w 1000 ohm R50 51 52 95 97 1820103000 Resistor carb 1 4w 10K ohm R185 192 197 198 211 1820103000 Resistor carb 1 4w 10K ohm R119 136 141 146 165 166 180 1820103000 Resistor carb 1 4w 10...

Страница 88: ...esistor ww 5W 40 ohm R203 204 205 206 1828759030 Resistor pwr ox 3W 7 5 ohm R213 214 1829101040 Resistor Pack 9x100K 10 pin SIP RP1 2 3 4 1920280000 Socket IC non ret tin 28p WDIP For U40 1920520000 S...

Страница 89: ...ection 1 6 1 1 Special Software Versions The options listed in the section may or may not be installable in an RTU 292C that has special software created by us to fit a non standard application If you...

Страница 90: ...to four threaded standoffs in the options tray with a 20 wire cable from the option to connector J7 on the Options Interface board which is also installed in the options tray Figure 6 1 shows correct...

Страница 91: ...ility the Squelch Break Access Option allows the use a series of squelch breaks to automatically connect to the telephone at speed dial location 01 see next section In the following description system...

Страница 92: ...ation with the prompt Please confirm by entering a single Star digit along with the Query tone prompt If the RTU 292C does not receive confirmation within five seconds it will give a Timeout prompt an...

Страница 93: ...confirmation with the prompt Please confirm with a single squelch break The caller confirms his desire to call by giving 1 additional short squelch break within 5 seconds If the RTU 292C does not rece...

Страница 94: ...E hhmmss where hh is the hour 00 23 mm signifies the minutes 00 59 and ss gives the current seconds 00 59 6 5 3 Setting The Date Enter the command DATE ddmmyy where dd is the current date 01 31 mm is...

Страница 95: ...garding the command descriptions NOTE It is possible to enable this option remotely If you have purchased an RTU 292C without this option and want to add it contact us 6 6 1 CONTROLLING THE RADIO VIA...

Страница 96: ...lect 0 plain text 1 cipher text 7 0 1 Modulation select 0 AM 1 FM 8 0 2 Power level select 0 low 1 med 2 high 9 9 Saves the current radio channel preset data Leave Radio Command Mode may be entered at...

Страница 97: ...LING THE RTU 292 VIA THE OUTSIDE LINE 3 9 CALLING TIMER 3 15 Chassis Assembly 5 7 Checking The Time And Date 6 6 Command Summary 4 2 COMMANDS SENT TO THE RTU 292 4 1 CONFIGURATION 6 2 CONFIGURING 2 6...

Страница 98: ...allation 2 1 INSTALLATION AND CONFIGURATION 6 2 INSTALLATION CHECKLIST 2 23 INSTALLATION CONSIDERATIONS 2 3 Installation Overview 2 2 INSTALLATION OVERVIEW 2 2 INTERCONNECT INFORMATION 2 12 Interface...

Страница 99: ...ROTECTION 3 15 RTU 292 Places the Call 6 4 RTU 292 SPECIFICATIONS 1 6 RX 11 RX LINE INPUT IMPEDANCE 2 8 S SELF TEST 3 8 Send Receive Levels 2 7 SERIAL PORT BAUD RATE 2 9 SETTING TELEPHONE SEND AND REC...

Страница 100: ...SING THE CALL LOGGING FEATURE 6 6 USING THE HANDSET WITH THE RADIO 3 5 Using the Speed Dial Feature 3 17 V Version Response 4 17 VOICE PROMPT OPTION 6 2 Voice Prompt Option Installation 6 3 VOICE PROM...

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