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Содержание R-2001A

Страница 1: ...TOROLA ll ttiC Communications Group R 2001A R 2002A COMMUNICATIONS SYSTEM ANALYZER Motorola Inc 1980 All Rights Reserved Printed in U S A 1313 E Algonquin Road Schaumburg II 60196 68P81069A84 0 5 30 80 SK ...

Страница 2: ... 2 13 Off The Air Monitor 2 2 2 14 IF Display 2 2 2 15 Spectrum Analyzer 2 3 2 16 RF Burnout Protection 2 3 2 17 Terminated RF Power Measurement 2 3 2 18 In Line Power Measurement 2 3 2 19 Duplex Generator 2 3 2 20 500 kHz Oscilloscope 2 3 2 21 Frequency Counter 2 4 2 22 AC DC Voltmeter 2 4 2 23 Power Supply 2 4 2 24 Accessories 2 4 SECTION 3 INSTALLATION 3 1 Packing Information 3 1 3 4 Initial Se...

Страница 3: ...or Assemblies 5 4 _ 5 16 Theory of Operation 5 5 4 5 17 General 5 5 5 20 System Control 5 5 _ 5 25 Generate Mode 5 5 5 34 Power Meter 5 11 5 40 Monitor Mode 5 12 5 52 Duplex Generator 5 14 5 56 Code Synthesizer 5 15 5 65 Frequency Counter 5 17 5 71 Digital Voltmeter DVM 5 17 5 84 Oscilloscope 5 19 5 96 Sinad Meter 5 21 5 99 Alignment Procedure 5 22 5 100 Introduction 5 22 5 102 Test Equipment Requ...

Страница 4: ...LE A3 9 1 General 9 1 9 4 Scope Vertical Control 9 1 9 7 SSB Detection 9 1 9 8 i 455 kHz PLL 9 2 t 9 9 Scope Horizontal Control 9 2 9 11 Synthesizer Sweep Control 9 2 9 12 Scope Z Axis Control 9 2 9 13 Modulation Display Control 9 2 9 17 Peak Detector 9 3 1 9 18 DVM Control 9 3 9 21 SINAD Detection 9 4 9 22 Module Control 9 4 SECTION 10 RECEIVER A4 10 1 General 10 1 10 2 Down Converter 10 1 10 4 L...

Страница 5: ...nal Modulation 12 2 12 12 Modulation Control 12 2 1 12 14 Module Control 12 2 SECTION 13 PROCESSOR 1 0 MODULE A7 13 1 General 13 1 13 2 10 245 MHz Phase Locked Loop 13 1 13 3 System Control Bus Interface 13 1 13 6 DVM 13 1 13 8 Frequency Counter 13 1 SECTION 14 IEEE INTERFACE MODULE AS 14 1 General 14 1 14 2 IEEE Bus Interface 14 1 14 3 RF Level Control 14 1 14 5 Modulation Control 14 1 14 6 Addre...

Страница 6: ...8 1 SECTION 19 10 MHz FREQUENCY STANDARD MODULE A13 19 1 General 19 1 SECTION 20 FRONT PANEL A14 SECTION 21 BLOWER ASSEMBLY SECTION 22 IEEE 488 BUS CONTROL 22 1 Introduction 22 1 22 7 IEEE 488 Bus Structure 22 3 22 9 Bus Signals 22 3 22 10 Data Transfer 22 3 22 12 Programming 22 3 22 15 Command Structure 22 4 22 24 Command Strings 22 10 22 25 Command Types 22 1 0 22 29 Trigger Command 22 10 22 30 ...

Страница 7: ...st Setup for Using DVM and Signal Generate with CRT Display 4 20 5 1 Communication System Analyzer Top View Cover Removed 5 3 5 2 Communication System Analyzer Bottom View Cover Removed 5 3 5 4 Generate Mode Block Diagram 5 10 5 5 Power Meter Block Diagram 5 12 5 6 Monitor Mode Block Diagram 5 13 5 7 Duplex Generator Block Diagram 5 15 5 8 Code Synthesizer Block Diagram 5 16 5 9 Frequency Counter ...

Страница 8: ...5 4 5 2 Control Buses and Functions 5 9 5 3 Basic Test Equipment Required 5 22 5 4 Extended Test Equipment Required 5 23 5 5 Test Equipment 5 32 5 6 System Troubleshooting 5 37 5 7 Test Point Identification 5 42 9 1 Internal DVM Inputs 9 3 22 1 IEEE 488 Interface Controllable Functions 22 2 22 2 Command Categories 22 4 22 3 Programming Commands 22 5 22 4 Terminal Mode ASC II Characters Printable C...

Страница 9: ...ncy and accuracy and reduces servicing time The Communications System Analyzer performs the functions of signal generation signal monitoring and the tests normally associated with the devices listed below Spectrum Analyzer Duplex Generator Modulation Oscilloscope Frequency Counter AC DC Digital Voltmeter RF Wattmeter General Purpose Oscilloscope Multi Mode Code Synthesizer SINAD Meter Sweep Genera...

Страница 10: ... Figure 1 1 Communications System Analyzer 1 0 ...

Страница 11: ...Output into 50 ohms Attenuator Range Accuracy Spectral purity Spurious Harmonics Frequency modulation Range Accuracy FM residual noise External internal frequency range External input Modes Description Signal Generator Mode 10kHz to 999 9999 MHz 100Hz Equal to master oscillator time base 16 dB variable plus 10 dB steps over 13 ranges 0 1 P V to 1 Vrms 127 dBm to 13 dBm 2 dB accuracy on 0 dB step a...

Страница 12: ... simultaneously 25 dB 1 MHz 500 MHz Monitor Mode 1 MHz to 999 9999 MHz 100Hz Equal to that of master oscillator time base Autoranging CRT display 10 Hz resolution for frequency error measurements on 1 5 kHz 5 kHz and 15 kHz full scale ranges 1 Hz resolution on the 50 Hz full scale range 1 5 Jl V for 10 dB EIA Sinad narrow band 6 kHz mod acceptance 7 11 V for 10 dB EIA Sinad wide band 100 kHz mod a...

Страница 13: ...y Adjustable between 1 MHz and 10 MHz d1spersion Duplex Generator Frequency offset Adjustable from 0 to 10 MHz plus fixed offset of 45 MHz high or low side Modulation level FM only Adjustable from 0 to 20 kHz peak deviation Oscilloscope Size 8 em x 10 em Frequency response DC to 0 5 MHz 3 dB point External vertical input range 10 mV 100 mV 1V 10V per division Sweep rates 1p s 1011 s 0 1 ms 1 ms 0 ...

Страница 14: ...10 100 300 volts full scale AC dBm calibrated across 600 ohms 1 of full scale 1 least significant digit 5 of full scale 50 Hz to 10kHz Modulation Source 5Hz to 9 9999 kHz sinewave 0 1 Hz 0 01 1 Four fixed 1 Tone only 2 Tone with battery saver 3 Tone and voice 4 Group call Four user programmable Remote base access sequence as follows Tone A for 150 msec Tone B for 40 msec 10 dB below Tone A Tone A ...

Страница 15: ...63Hz DC 11 5 VDC to 16 VDC Optional battery 13 6V battery provides 1 hour continuous operation Temperature range 0 to 55 C operating 40 to 85 C storage Table 1 3 Input Output Characteristics Characteristic Ext mod in Mic Ext Horiz Vert Sinad DVM Counter In Description Input 10K ohms nominal 150 mV typical for 20kHz dev FM or 80 AM Mic input provides bias and IDC limiting suitable for Motorola RTM ...

Страница 16: ... the protected circuits it is advisable to always switch the system to the power monitor mode before applying power in excess of 200 mW Additional protection is also obtained by making it a practice not to leave the step attenuator in the 0 dB position Characteristics suitable for Motorola ST 1200 series Wattmeter Elements 70 to 350 mV rms input required at 10 MHz impedance greater than 50 ohms Ou...

Страница 17: ...RT in both analog and digital format with the name of the function being displayed The CRT also displays control settings eliminating the need for operator search of different equipment panels Digital readouts are visually aided by the use of the continuously autoranging analog line segments which are similar to a bar graph Each has a base line and calibration markers in addition to the intensifie...

Страница 18: ...s and filters 2 11 SINAD Metering A comprehensive check of receiver performance can be made with a SINAD measurement The analog line segment and digital representation of SINAD appear automatically whenever the unit is in the normal generate mode The only hookups required are from the Communications System Analyzer to the RF input of the receiver under test and from the audio output of the receive...

Страница 19: ...Additional protection is also obtained by making it a practice not to leave the step attenuator in the 0 dB position 2 17 Terminated RF Power Measurement RF power is automatically measured when the Communications System Analyzer is in the Power Monitor mode The built in RF load dissipates up to 50 watts for three minutes and up to 125 watts for one minute If a high power transmitter should be keye...

Страница 20: ... of 1 10 100 and 300 Volts AC or DC measurement is selected on the CRT The meter s wide dynamic range and three d igit display are ideal for setting power supply voltages checking b1as levels and setting audio levels Like the Frequency Counter the DVM will operate simultaneously w1th generate or monitor operation 2 23 Power Supply The Communications System Analyzer may be powered by a variety of s...

Страница 21: ...anel N connector to BNC female Antenna TEKA 24A Plugs into RF in out connector on front panel with N to BNC adapter Used for off the air transmitter and receiver tests Test microphone RTM 4000A Used for voice modulation of signals Connector kit RPX 4097A Consists of connector shell clamp and four connector pins Used to fabricate a mating plug for male de power connector at back of analyzer Enables...

Страница 22: ...P 1002A RTL 1007A RTL 4056A Use 13 6 volt battery and charger attaches to back of the unit Provides one hour of continuous operation Cannot be used with IEEE 488 or Blower options Improves stability of the time base as specified in electrical characteristics section Padded fabric type cover to protect unit from excessive field wear I i if i i izli ...

Страница 23: ...ipped Cursor will move down only When on last line will return to top line with next entry l Horizontal cursor key Moves the horizontal cursor left to the next entry position that may be changed When in the last left position the cursor will move to the far right with the next entry 0 through 9 Numerical keys Used to select from the memory a stored value to be used or to enter directly a value to ...

Страница 24: ... I N 79 3891 flf tf11 1 11111111 11111111 IIIIIEIEI I ert Sm d Ql 7 Vtfl OH011 POWER 1 o Re II Iii A MONITOR r i lt o8eat h 1Kl i ll l t Figure 4 1 Controls Indicators and Connectors Front Panel 8521 15 ...

Страница 25: ... f 79 31112 TIMEBASE FRED STD CAUSRATE Figure 4 2 Controls Indicators and Connectors Left Side Panel Figure 4 3 Controls Indicators and Connectors Rear Panel 4 3 8521 16 ...

Страница 26: ...g DC power Illuminates when equipment is connected to an ac power source Position of POWER switch has no effect on indicatot Equipment automatically switches to ac power source when connected to ac line voltage Illuminates when optional frequency standard oven has stabilized Continuously illuminated with the TCXO frequency standard Illuminate one at a time to indicate the function or type of opera...

Страница 27: ...es available g Freq Counter The frequency of the signal input to the front panel frequency counter jack is displayed h DVM The AC or DC level of the signal at the front panel DVM jack is displayed The AC or DC mode is selected with the display cursor and the keyboard The battery voltage is also displayed i Ext Wattmeter The external wattmeter element selected and the forward and re flected power b...

Страница 28: ...s an unmodulated RF signal Monitor CW provides frequency error measurement only c AM equipment generates or monitors amplitude modulated signals d SSB DSBSC equipment generates a double sideband suppressed carrier signal NOTE The level of the DSBSC signal generated is not calibrated it is for use in relative measurements only Monitor SSB mode receives SSB signals with the use of the BFO e SWP 1 10...

Страница 29: ...cess sequence leaves tone A at a low level for transmit type commands until the switch is returned to the Off position This switch is spring loaded to return to the Off position from the Burst position CODE SYNTH Mode Six LEOs red When illuminated indicates the selected mode of indicators the Code Synthesizer a PL DPL Indicator PL Selected Private Line frequency output to 1 kHz DPL Selected Digita...

Страница 30: ...d by the equipment as indicated by the DISPLAY LEOs a moves the selection up one step at a time b V moves the selection down one step at a time Selects the type or mode of signal the equip ment will generate or monitor as indicated by the FUNCTION LEOs Operation is the same as for the DISPLAY select switches Selects the Code Synthesizer output mode as indicated by the CODE SYNTH MODE LEOs Operatio...

Страница 31: ...t a rate equal to the difference indicator between the received carrier frequency and the programmed frequency Also is used as a squelch indicator Squelch control Potentiometer Adjusts squelch threshold level full counter clockwise position disables squelch NOTE Monitor sensitivity is greatly decreased for high level use as the control is increased clockwise beyond the quieting point lmage Dplx sw...

Страница 32: ...ger mode In Auto position continuous sweep with no vertical input signal syncs on vertical input Normal position no sweep unless vertical input is present syncs on vertical input Controls the position of the CRT display when in the oscilloscope mode Controls the vertical position of the CRT display Controls the horizbntal position of the CRT display Oscilloscope operation uses values marked to the...

Страница 33: ...Controls the duplex generator output frequency potentiometers in the Duplex Generation mode Coarse Inside small control Coarse frequency control knob Fine Outside large control Fine frequency control knob Frequency offset Three position switch Selects the offset of the transmitted frequency control 0 10 MHz Off from the selected receive frequency Image 45 MHz Dplx switch determines side of selecte...

Страница 34: ...he functions the Communication System Analyzer is capable of performing The unit may be preset to any of the functions the unit performs As a function and its parameters are selected they are displayed on the CRT The unit contains a nonvolatile memory that stores frequently used data for fast access reducing setup time As a function is selected if data for that function is stored the data is displ...

Страница 35: ...lyzer Time Base Calibrate Test Setup and CRT Display FREQUENCY CARRIER ERROR POS AM 4 8 GENERATOR OPERATION The system generates RF frequencies for FM AM CW SSB and DSBSC types of transmission covering a range of 10kHz to 1000 MHz To generate a signal the FUNCTION switch is placed in the Gen position NOTE An RF protection circuit to protect against damage due to inadvertent application of RF power...

Страница 36: ...ter transmitter signal sample to RF In Out connector The Duplex Gen Output level is fixed at 30 dBm nominal b Set FUNCTION switch to Gen and DISPLAY to Duplex Gen c Select Duplex Monitor frequency repeater transmit frequency from memory table or enter directly from keyboard d Set DUPLEX GENERATOR frequency to repeater receiver frequency e Adjust PL and test tone deviation to desired level on displ...

Страница 37: ... top right of the CRT The following is an example of locating the frequency of an incoming signal with the spectrum analyzer a b c d e f Connect antenna to RF IN OUT connector Set FUNCTION switch to Mon and DISPLAY to Spect Analyzer Select center frequency from memory table or enter directly from keyboard Adjust Disp Sweep control for desired spectrum span Adjust Step attenuator i f required to re...

Страница 38: ...o the Monitor position for small signal samples or off the air monitoring For high power signal monitoring 0 2w to 125w set the FUNCTION switch to Pwr Mon CAUTION To prevent undue stress on the protected circuits it is advisable to always switch the system to the power monitor mode before applying power in excess of 200 mw Additional protection is also obtained by making it a practice not to leave...

Страница 39: ... and install element adaptor assembly into transmission line NOTE Arrow on In Line Wattmeter Adaptor must point in the forward direction of the desired rf power flow through the adaptor e Key transmitter and observe magnitudes of forward and reflected power as displayed simultaneously on the 2 analog meter bars and corresponding digital readouts R 2001A FUNCTION Y T111E TE ELEMEtll NO I EXT 1 2 tS...

Страница 40: ...NAD READING POS DEVIATION ANALOG DEVIATION INDICATOR Figure 4 8 Test Setup for FM Receiver Sensitivity Using Generator and SINAD Meter with CRT Display b Test pager decode and alert function and demonstrate simultaneous modulation 1 Set FUNCTION switch to Gen and DISPLAY to Tone Mem 2 Select pager frequency from RF memory table or enter directly from keyboard 3 Enter pager tone code frequencies an...

Страница 41: ...sly 1 2 3 Select the DVM function by means of the arrow keys located below the DISPLAY column Using the keyboard down arrow position the CRT cursor adjacent to the DVM Mode graphics Enter a 1 via the keyboard to select AC voltage measurement or a 2 for DC voltage measurement selection 4 Set up the desired on channel RF signal to provide an input to the receiver 5 6 7 Set Function switch to Gen Set...

Страница 42: ...OUT DVM COUNTER IN 10 ANALOG 1 6 1811 V i 1C e 45 _ DVM READING INDICATION OF DVM READING D H MODE I 11 ftC DVM SELECT RADIO TEST DC AC OR DC UNDER PROBE E ALA M OS Ct KHZ AT 0 I _ BATTERY TEST VOLTAGE 8521 24 Figure 4 10 Test Setup for Using DVM and Signal Generate with CRT Display 4 20 ...

Страница 43: ...Equipment Repair Center via telephone Required replacement parts are then immediately shipped to the user thereby reducing shipping time and servicing costs For telephone troubleshooting contact the Test Equipment Repair Center toll free at 800 323 6967 5 5 All other inquiries and requests for test equipment calibration and repairs should be directed to the Area Parts Office They will contact the ...

Страница 44: ...ts Department 3125 Steeles Avenue East Willowdale Ontario Phone 516 499 1441 TWX 610 492 2713 Telex 02 29944LD 5 13 All Countries Except U S and Canada MOTOROLA INC OR MOTOROLA AMERICAS INC International Parts 1313 E Algonquin Road Schaumburg Illinois 60196 U S A Phone 312 397 1000 TWX 910 693 1592 or 1599 Telex 722433 or 722424 Cable MOTOL 5 2 MIDWEST AREA PARTS 1313 E Algonquin Rd Schaumburg Ill...

Страница 45: ...d 01 P00386N001 RTC 4010A A6 Audio Synthesizer Module 01 P00426N001 RTC 4011A A7 Processor Input Output Module 01 P00405N001 RTC 4012A A8 IEEE Bus Module Optional 01 P00430N001 RTC 4013A A9 Microprocessor Character 01 P00401 N001 RTC 4014A Generator Module A10 High Voltage Power Supply Module 01 P00417N001 RTP 1001A A11 RF Input Module 01 P00394N001 RTC 1002A A11A1 Protection Power Meter Card 01 P...

Страница 46: ... Figure 5 1 Communication System Analyzer Top View Cover Removed All A13 i 1 0 Figure 5 2 Communication System Analyzer Bottom View Cover Removed 5 4 ...

Страница 47: ... an 8 bit data bus and a 7 bit control bus This bus interfaces the processor to its program memory ROM scratch pad memory RAM IEEE interface and the peripheral interface adapters PIA The PIA is the mechanism by which the processor interfaces with the system A PIA consits of a dual 8 bit latch which may be programmed as either an input or output for the microprocessor System input and control infor...

Страница 48: ...A1 Sw In In In In 1500 1000 250 500 CSSG CSSG Hi Lo Gen DVM MODE Cont Burst 8 Out Out Image Sw In 8 Enab Enab Select Sw In Sw In Sw In WB MOD MOD MOD Pk Det Pk Det Pk Det Scop V rtlcal Switch Pll_n_ 0 1V 0 01V 9 MOD X 2 INV INV FM SWP FM MOD AM MOD Demod 10V 1V 100kHzlOkHz lkHz g Enab Enab Sel Sel Enab Enab Enab DIV DIV 1 DIV DIV 0 01 500 700 LOOP MOD lnt DVM IF BFO Mon Scope 1000 00 1000 INV INV ...

Страница 49: ...ence frequencies are provided for a fixed 550 MHz locked loop and for a programmable 500 MHz 1000 MHz locked loop The programming of the 500 MHz 1000 MHz locked loop is provided by the RF CONTROL BUS from the processor The SELECT SWITCH selects one of three possible output points for the SYNTH RF output signal The first is from the 500 MHz 1 000 MHz loop directly The second is from a divide by two...

Страница 50: ...ep Attenuator The total range of the attenuator is from 0 dB to 130 dB attenuation For the basic R2001 A the Step Attenuator is controlled directly by a shaft to the front panel knob With the IEEE control option the Step Attenuator is electrically programmable and controlled by the processor The front panel knob in this case is connected only to a rotary switch which directs the processor in setti...

Страница 51: ... to be checked for frequency error modulation level and spectral content AM FM and sideband modulations can be accommodated with this system A block diagram of the monitor mode is shown in figure 5 6 5 42 The RF signal to be monitored is applied to the RF Input jack on the RF Input module A11 If the input level is less than 200 mW the input signal passes directly through the Input Protection circu...

Страница 52: ...scillator The Second Local Oscillator is phase locked to the 10 MHz system standard so that its frequency is as accurate as the standard The phase locked loop for the Second Local Oscillator is split between two modules A 10 245 MHz SAMPLE signal is compared with the REFERENCE FREQUENCIES from the RF Synthesizer on the Processor 1 0 module A7 The comparison provides a TRACKING VOLTAGE error signal...

Страница 53: ...kHz The BFO signal is switched with the output of the 455kHz IF Phase Locked Loop PLL to the frequency counter for frequency error determination The455 kHz PLL filters and shapes the IF signal to make it suitable for frequency counting 5 51 When in the spectrum analyzer mode the linear IF Amplifier is shut down and the Log Amplifier is activated The output of the Log Amplifier and Detector is a DC...

Страница 54: ... the processor in response to the code entered by the operator The 23 bit DPL word is stored in the DPL Generator and continuously output when selected Either PL or DPL signals are switched to the Code Synthesizer Level control on the front panel 5 60 A 1 kHz reference signal from the RF Synthesizer is bandpass filtered to provide a low distortion 1 kHz sinewave to the front panel 1 kHz Level Cont...

Страница 55: ...ation Output jack MOD OUT on the front panel The signal to the front panel jack is buffered by a Driver Amplifier to provide a low driving source impedance 5 64 The AM modulation signal at the output of the Select Switch is sumed with a 5 volt signal This combination provides a DC level to control the average output power of the wideband amp in the RF Input module and a superimposed modulation sig...

Страница 56: ...ule A7 routes the desired signal to the Frequency Counter circuitry The signal selected is controlled by the processor and is determined by the operating mode of the system 5 69 A 16 bit gated accumulator is used to determine the input frequency Gate times from 1 msecto 10sec are automatically selected by the processor to give the maximum possible resolution The gate times are derived from the RF ...

Страница 57: ...or and is performed as required to obtain the information on the CRT To keep the CRT information current each of the required measurements are made in sequence at an approximate rate of thirty per second The net effect is a multiplexing of the voltage information to the processor 5 74 Two modulation signals MOD CAL AUDIO and CARRIER MOD LVL and a demodulated signal DEMOD CAL AUDIO are made availab...

Страница 58: ...trolled autoranging over a four decade range Input voltages from 1 millivolt to 300 volt can be handled through the DVM Input 5 81 For DC measurements a lowpass filter LPFL removes AC signal components The filter provides approximately 25 dB rejection at 50 Hz so that accurate DC measurements can be made with superimposed AC line ripple When the AC measurement mode is selected the LPFL is reprogra...

Страница 59: ... or external horizontal input are switched to a sumation amp where the HORIZONTAL POSITION signal from the front panel is added The resulting DC offset positions the display horizontally on the CRT 5 88 Six decade sweep ranges from 1J1 sec to 100 msec per division are provided by the Time base Generator Control of the Time base Generator is from the front panel horizontal switch through the proces...

Страница 60: ...en the external vertical input or the modulation scope inputs The External Vertical input path is further selected between AC and DC coupling before becoming the vertical input jack on the front panel The modulation scope signal path is switched to one of three possible sources on the Scope DVM Control module Demodulation signals from the Receiver are selected via the DEMOD CAL AUDIO path and freq...

Страница 61: ...alignment procedure requires module extenders and a calibrated digital voltmeter in addition to the oscilloscope The extended procedure should be performed as required after servicing the system All adjustments not covered in this procedure are to be performed on suitable module test fixtures only 5 102 Test Equipment Required 5 103 The test equipment or its equivalent listed in table 5 3 is requi...

Страница 62: ...utes prior to alignment 5 105 Basic Alignment Procedure 5 106 CRT Astigmatism and Geometry 1 Select the Monitor Function and the Gen Mon Mtr Display on the R2001 A Set the Intensity Control for a medium intense display 2 While using the Focus Control to maintain a focused display at the center of the CRT adjust the Astigmatism and Geometry potentiometers Figure 5 13 for the best focus at the outer...

Страница 63: ... Balance potentiometer affects the intensity on the left side of the trace 5 109 CRT Horizontal Centering 1 Select the Gen Mon Mtr Display on the R2001 A Adjust the Intensity Control for a comfortable viewing brightness 2 With the Test Point Shorting Jumper connect TP1 of the Scope Amplifier Board Figure 5 13 to chassis ground 3 Adjust the Horizontal Position Potentiometer Figure 5 13 so that the ...

Страница 64: ...ode Synthesizer off the Ext Level off and the 1 kHz Level up about half way 4 Connect an oscilloscope with a calibrated vertical input to TP4 on the Scope Amplifier Board Figure 5 13 5 Using the front panel 1 kHz Level Control adjust for a 3V p p amplitude on the sinewave at TP4 6 With 3V p p at TP4 adjust the Vertical Gain Potentiometer Figure 5 13 for a 6 em p p sinewave on the CRT use the front...

Страница 65: ...panel Set the RF Step Attenuator to obtain a convenient spectral display 3 Adjust the Spectrum Analyzer Centering Potentiometer on the Scope DVM Control Board Figure 5 15 so that the spectral line on the CRT is centered about the center graticule line 5 117 Horizontal Time Base 1 Select the Tone Memory Display and the Generate FM Function on the R2001 A Program tone A for 20 0 Hz and Tone B for 20...

Страница 66: ...red in the middle of the screen to avoid nonlinearities near the edge of the CRT Figure 5 16 Horizontal Time Base Alignment Points 5 Set the Oscilloscope Horizontal Control for a 10011 Sec Div sweep rate and select the Tone B output on the Code Synthesizer 6 Adjust the Fine Time Base Calibration Capacitor on the Scope Amplifier Board Figure 5 16 so that one cycle of the displayed waveform occurs i...

Страница 67: ...he ground from the DVM Input and connect the DVM Input to TP 12 of the Scope DVM Control Board Figure 5 18 Figure 5 18 Scope DVM Control Test Point Numbering 6 Disconnect the external DVM from pins 1 and 6of J3and connect it to TP 12 of the Scope DVM Control Board and chassis ground Note the DVM reading for TP 12 7 Reconnect the external DVM between pin 1 and pin 6 of J3 The external DVM should sh...

Страница 68: ...sor 110 Board Figure 5 19 for a DVM reading on the CRT equal to the voltage measured at TP 12 with the external DVM for paragraph 5 119 6 12 Connect the external DVM to TP11 of the ScopeiDVM Control Board and chassis ground Note the DVM reading for TP11 13 Disconnect he external DVM from TP11 and connect the DVM Input Jack on the front panel to TP11 of the ScopeiDVM Control Board 14 Adjust the AID...

Страница 69: ... Vertical Character Sweep Width Potentiometer on the Scope DVM Control Board Figure 5 20 so that the bottom edge of the CRT display is approximately 3 3 graticule divisions below the graticule center line 6 Turn the system power off and reinstall the Scope DVM Control Board into the R2001A 5 121 Sinad Notch Filter 1 Turn the R2001 A off and extend the Scope DVM Control Board using the 100 pin exte...

Страница 70: ... Marked on the Receiver Test Cover for a reading of 30 5 on the CRT AM display 5 124 FM Detector 1 Select the Monitor FM Function and the Gen Mon Mtr Display Set the monitor frequency to 250 MHz the RF Step Attenuator to the 0 dB position and the BW Switch to the Wide position 2 Connect the external signal generator to the RF In Out Jack on the front panel Adjust the external generator for a cente...

Страница 71: ...he spectral line lies on the 30 dB line of the CRT and that successive step increases of the input attenuator move the spectral amplitude downward in 10 dB increments on the CRT The accuracy required for any one step attenuator position is 3 dB 6 It will generally be necessary to repeat paragraphs 5 125 4 and 5 125 5 until the best possible accuracy is obtained 7 Turn the power off and remove the ...

Страница 72: ...multaneously depress both cursor keys and after a five second delay turn the system power OFF Turn the system power back ON and verify that the same Display Function and Modulation Modes are present 5 135 Modulation Capability 1 Set the UUT to the Generate FM Mode and select the Gen Mon Mtr Display On the Gen Mon Mtr Display enter a DPL code of 111 Select the Oscilloscope Display and connect the M...

Страница 73: ...38 1 verify th operation of each position of the Horizontal Control and the Horizontal timebase vernier 3 With the Horizontal Control set to the External Mode connect the External Horizontal jack to the Mod Out jack Verify a horizontal line whole length is variable with the Horizontal Vernier 4 Connect the Vert In jack to the Mod Out jack on the UUT Set the vert and horizontal controls for a conve...

Страница 74: ... kHz tone at the speaker output 6 Connect the Modulation Meter to the RF In Out Jack on the UUT Set the Modulation Meter for a deviation display of 5 kHz 250 Hz 7 Select the Wide Band mode on the UUT and verify that the CRT displays a deviation of 20kHz Also verify that the Modulation Meter shows a peak deviation of 20 kHz 1 kHz 8 Select the Modulation Display on the UUT and verify a peak to peak ...

Страница 75: ...al Generator for a 10 dB reading on the SINAD Meter Verify that the Signal Generator s level is less than 103 dBm 1 5 11 Vrms 5 Calibrate the RF Signal Generator for 3 kHz FM at 1 kHz rate using the Modulation Meter Set the Generator for a nominal output level of 60 dBm and connect it to the RF In Out Jack of the UUT Select the Gen Mon Mtr Display and verify a monitor deviation reading of 3kHz 150...

Страница 76: ...cy for a duplex output of 100 MHz Connect the Duplex Output Jack to the RF In Out Jack and verify a 20kHz 1 kHz FM deviation reading on the CRT 5 146 System Troubleshooting 5 147 A troubleshooting procedure is outlined in Table 5 6 Because of the complexity of the system the table covers only the major failures and provides only a guide to the most probable failed module When using the table it is...

Страница 77: ...is a feedthru cap on the high voltage supply and can be reached from the top side just beyond the CRT socket CAUTION There is 11OV on the rear panel connector even when the power switch is turned off If 9 volts is not present replace the high voltage supply A1 3 If items 1 and 2 check okay replace the low voltage supply A1 1 Check for presence of high voltage by dis 2 1 1 1 1 2 connecting the CRT ...

Страница 78: ...lation jumpers on J8 for the standard unit 3 Continue troubleshooting at step 3 of the no DPL signal on the CRT 5 136 Frequency Counter inoperative 1 Check for presence of a 1 kHz signal at TP9 of the Audio Synthesizer A6 If not present check for the 10 MHz signal from the Fre quency Standard module A13 to the RF Synthesizer AS If present replace the RF Synthesizer If not present replace the Fre q...

Страница 79: ...apply an AC signal to the DVM in put Proceed from step 2 under DVM AC mode inoperative 5 138 No horizontal sweep 1 Check for a voltage level between 2 0 VDC and 2 0 VDC at TP4 of the Scope Amplifier module A2 If the voltage cannot be brought within range with either the vertical range attenuator or the vertical position control replace the Front Panel Interface module A12 2 If the voltage at TP4 i...

Страница 80: ...zer output If no output replace the RF Synthesizer 2 If the Synthesizer output is okay replace the RF input module 1 Check for modulation signal at pin 56 of the RF Synthesizer AS If the signal is okay replace the RF Synthesizer 2 If the modulation signal is not present pro ceed to the troubleshooting list under no DPL modulation signal on CRT 1 Replace RF input module A11 1 Apply a 10 7 MHz moduI...

Страница 81: ...counted from left to right when facing the component side of the card Module Test Point No Signal Description A2 1 Horizontal Amp Input Scope Amplifier 2 Horizontal Deflection Plate 3 Horizontal Deflection Plate 4 Vertical Amp Input 5 Focus Tracking Voltage 6 Vertical Deflection Plate 7 Vertical Deflection Plate 8 Z Axis Modulator Output 9 Intensity Tracking Voltage 10 Time Base Output A3 1 Vertic...

Страница 82: ...Clock 104 857 6 Hz 9 1 kHz Modulation Source A7 1 A D Input Processor 1 0 2 Unfiltered 10 245 MHz T V 3 DVM Freq Counter Select 4 Frequency Counter Input 5 Not Used A9 1 Ground Processor 2 Character Clock 3 Character Row Clock 4 Character Dot Clock 5 Enable 6 Character Line Clock 7 R W Select 8 Char Gen Processor Select A12 1 Attenuator Buffer Output Front Panel Interface 5 43 ...

Страница 83: ...SECTION 6 SYSTEM INTERCONNECT AND PARTS LISTS ...

Страница 84: ...r _ RF SU 11 8 IEEE 1 _21 E MOtl J 1 o r a CC nzo e u c e o J ZS U a Gato ih l C TOR Figure 6 1 System Interconnect Diagram Sheet 2 of 2 ...

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Страница 87: ... i vu oo ll H ai 51 I r 4 I L _ llf LJ A j 0 14 G W 10 TA Wia J Ow W f Ll Figure 6 1 System Interconnect Diagram Sheet 1 of 2 ...

Страница 88: ... r r i lA TWE SIZQ L fi 1 oo i ii i HU a U glii PI J iUliUUinu L J ...

Страница 89: ...E R u t o IIOO teu oct ftM OJ GOW URbo Ot i iU OC fl04t 4 T trr PP ft TO Ut ll WI IE tt1 O fll f1C 4 FOlt W EQE K C CRirrr Y 0 00 Wt O 01 P 038 004 m J l 14 fG e JS s I l I I ll 1I I y A f P O S J S S J JS II Il H Hnn f f rr r t tll r 1 r Jll ...

Страница 90: ...i I t Figure 6 2 Motherboard Assembly Parts Locator RTL 4060A ...

Страница 91: ...41 4 fRONT PANU SS I ...

Страница 92: ... F3 41 44 ...

Страница 93: ...SHER FLAT N0 4 CONN ADAPTER N BNC CABLE ASSEMBLY IEEE 24 PIN WIRE 26 INK WHITE SOLDER PAINT SHADOWBRONZE FRONT PANEL ASSEMBLY CHASSIS SYSTEM PLATE MOUNTING PWR S A10 A11 SCREW PH CONTACT PIN SCREW PH WASHER FLAT WASHER LOCK SCREW FLHO WIRE SOLDER SPEAKER SHIELD CRT BRACKET CRT SHIELD MAGNETIC SHIELD SCREW THD FORMING SCREW THO FORMING FUSEHOLDER 6 32X 280 4 40X 312 N0 4 N0 4 6 32X114 22WHT 6 32X 2...

Страница 94: ... MICRO PROC CHAR GEN BLOWER ASSEMBLY HIGH VOLTAGE PWR SUPP A10 RF FRONT END A11 FRT PANEL INTRF ASSY FREQUENCY STANDARD A13 FUSE 250V 8A FUSE CARTRIDGE 250V 5A FUSE CARTRIOGE 250V 11 2A 6H CONNECTOR CONNECTOR 25PIN CONNECTOR BATTERY 4 PIN MALE CONNECTOR POWER INPUT CONNECTOR BLOWER 4 CONTACT TRANSFORMER LINE CATHODE RAY TUBE Find Qty No Req J 003 1 J 004 1 J 005 1 t J 006 1 J 007 1 1 J 008 1 f J 0...

Страница 95: ...C power removed and the unit off no power is present on the DC bus When the unit is switched to the standby mode the DC relay closes connecting the DC input to the DC bus and the supply voltage to the frequency standard is enabled Then with the unit turned on the chopper generator is enabled and normal operation occurs 7 6 DC Output Control Regulation of the DC output voltages is accomplished by r...

Страница 96: ...of the thermal switch the switch closes to ground shorting the control line and shutting down the supply Normal operation of the supply will be resumed when the temperature returns to a safe operating level 7 12 Protection for high or low DC and AC line inputs is provided by monitoring the voltage on the DC Bus If the bus voltage exceeds 20 volts or if the voltage falls below 10 volts the shutdown...

Страница 97: ......

Страница 98: ... U o re I I 1 eco 1 s I I I W1 w s l Low Voltage Power Supply A1 Schematic Diagram Sheet 1 of 2 RTP 1000A 1 I a uc l c O tv1 L L P llo r _ Qllii E Qti C T o 400 J C o o _s Ttr Ot a T 0 4 PQQ CI T 1 2 c oq q c c Q_trt K _ O o t G e 1L t TO t r t t 3 i_ 6 _ fct c T t T b 1 0 h J Ul A U OU Tcx t a Q Iii A OIS QttS 6 o O T o c cta_ C 9 10 OTC A A ctOO C to T T S 1 9s o J o e 9 v A 1 40 M o lO LM P 2 ...

Страница 99: ... l 01 I lt Q I To Ei g 1 J o l G J i c c o C J e b 1 11 J 6 AC LE D P 1 r 1 T F PZ I c 0 o l 1001 s 4 t 1 t M c s lJC 4 1C 3 6 f I Lr p L o ___ c CO __ H T _ __ 3 rP e 9 0 0 _t Q I w j I I o J r 8 1i 1 _ _ _ _ __ _ f t rp _____ Q ___ _ __ _ _ _ _ _J o 4 1 1 4 r TP e v Figure 7 2 I S 1 0 I 0 I l l1 I G Jt I L J S 1 1 J Cl eA rT VOL t __ _j Low Voltage Power Supply A1 Schematic Diagram Sheet 2 of 2 ...

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Страница 101: ......

Страница 102: ... lt 1 ____ _______________ i _ I J 1 0 C 1 I I ...

Страница 103: ... C29 C28 C27 C84 C2Z C85 n 16 p NU11SS CASE 612 C17 C15 C23 C94 ...

Страница 104: ......

Страница 105: ...off time begins During the hold off time which is equal to the sweep time the sweep generator and trigger circuits are reset in preparation for the next sweep 8 5 Horizontal Switching The input to the horizontal deflection amp is selected between two sources The INT HORIZ IN signal line provides the horizontal character sweep and the horizontal spectrum analyzer sweep The other source is the scope...

Страница 106: ... B B U28 IR145l IR142l B 0 u Figure 8 3 Scope Amplifier Parts Locator aBr U27 D o rrl 0000 R105 016 10000 ill1 Hml D 0 u c c c c c c ...

Страница 107: ......

Страница 108: ... output of the receiver logarithimic IF is the vertical input for the spectrum analyzer The remaining signal source is the second IF signal from the receiver for IF envelope observation 9 5 For the spectrum analyzer and the scope sweep displays the Dual Display Control and Character Sweep Counter circuitry allow a single row of characters at the top of the CRT This function is implemented with the...

Страница 109: ...and 0 01 1 MHz 9 12 Scope Z Axis Control The SCOPE Z AXIS signal has three possible sources as selected by the Z Axis Control circuit For character displays the Z Axis signal is the CHAR GEN Z AXIS from the character generator The SWP BLANKING signal from the horizontal timebase generator is switched to the scope Z Axis for the scope modes For the remaining modes spectrum analyzer and scope sweep ...

Страница 110: ...ng to the last cycle reading made at that input Thus each internal input is auto ranged over two decades to give three digit accuracy up to a maximum input of 10 volts The internal DVM inputs and their function are listed in table 9 1 Peak Voltage Peak Voltage Carrier Level RF INPUT PWR EXT FWD PWR EXT RFL PWR BATT VOLT TEMP SENS VOLT SINAD OUT SINAD IN Table 9 1 Internal DVM Inputs Positive modul...

Страница 111: ...ed and input to the processor where the SINAD is calculated 9 22 Module Control Processor control of the Scope DVM Control module is via the AF ADD BUS 0 3 the AF DATA BUS 0 3 and the AF BUS EN 1 signal lines The four address bits are decoded by the Address Decode to determine which Control Latch the fours bits of data will be latched The latching process is synchronized by the enable line Control...

Страница 112: ...1 f WI ii iioiii__i_ii_i_i_ i iiii _ r I I J w Go J n C L 4 110 R s Oli 1 Ul o J a C ltt l40 L U4 I J JY 4011 U7 C I SO U 9 LA 3 140 n t4CJ4 U O I CI C 2 Ull 111 L V I IOOV v _ _ II S O I I s s lq 1 G 8 4 1 I I t t ...

Страница 113: ... SSB AUDIO I I 01 2 U14 L UiO 2 73 I f U9 I I I 8FO FREO CNTL SSB IF BFO FREQ I I OET IFIBFO 65 82 I I BFO ON OFF CNTL FREO I I SEL 81 I I I I BFO FREOj I I I 455KHz I f PLL I I DISPERSIO N SWP I 455 KH2 SWP 6 T WIDTH I I DISPERSION SWP RTN I SEL I 61 I r r r I I I I U12 51 59 U52 Ll U51 52 I I SYNTH INT SCOPE HORIZ I YNTH SWP SYNC I SCOPE I 7 I SWP 0 95 I I GEN HORIZ I I I I I J SEL I I I HORIZ C...

Страница 114: ...ND I II I I U19 I INPUT PK DEl I I LOW PASS I SEL I I I FILTER I I I 1 L r 1 I I I I I I I INT I I DVM SEL I lrn I 1 1 DVM FROM RNG sw 1 l I 1 KHz RECT jSINAD OUT r AND l I NOT FIL F I I I il RECT ISINAD I f c AND I FIL I I I L _SINAO DETECTION_ i J I I L U5 J29 I I XO l 1 Ut 24 I I 1 t AITEN I TP8 I i y DVM TO A 0 I 3 I L_J ______ _1 1 DVM I I SEL I A F AO D BU S 0 3 ___ i_ UV ____ _ J 19 I AF BU...

Страница 115: ...to J 1 4 N z lr a rv vc404 1 o vt J e g6 MLI A l41 1 V 4 L I 1 1 W l d O C f t 1 7 _V3S3 t l ZV 4 idL IO l 1 Vi 4 I C OOI J IY 1A j 4 t C J C t 2 V t v c Jr 1 14 L 3 40 l h _ t7 V 4 IJ _t404 a fV 1 6 Scope DVM Control Module A3 Schematic Diagram Sheet 1 of 4 RTC 4008A i l d S vL l 2 T Q v S w 4 R TPI S V 1 s e o ______________________________________ J B 5 J Q C vTL 7 BFO t o c T 1 r 1 T D T g j_ ...

Страница 116: ...c r J P I n I c n 1 5 Q 4 J 04 I f I I I I __ ...

Страница 117: ... l t J E t o l t _ Q T c jOIO i oo Q S c C J Vlv LJ U _ _ _ __ Q t 4 7 0 3 IV 00 A C ...

Страница 118: ... s JB t 9 e z C C 5 1V F L Figure 9 2 Scope DVM Control Module A3 Schematic Diagram Sheet 2 of 4 RTC 4008A ...

Страница 119: ...Figure 9 2 Scope DVM Control Module A3 Schematic Diagram Sheet 3 of 4 RTC 4008A DE vee o _ yc s 1 C Q t Q v _ _ r r r 4 CJ v c 4 e o CD G I 55 S Po S 2 r c u IT S 1 CLl D 7 ...

Страница 120: ...U A AOG 4 ...

Страница 121: ... I J 41 I 14 14 04 2 I 4 t 7 1 I 14 i4G d 1 1 I 1 14 I 1 4 1404L 2 1 1 7 10 13 L404 2 1 7 I 14 4e I 4 14041 lo 7 10 J4S I 4 1404 1 1 1 ovo DVI OV l Dv ov Dv5 OVG Dv7 ev e OV9 t vl l t Z MOSO 150 V l A l IF e ws e 0 0 1 I L 4 SvG O l4 I vL 2 1 1 Q S ML l 9 S S lL 1 1 1 v 1 B b It 1 0 1 4 1 tE I I I l lOt i 2 E o lOQ 1 T o lE A t J Q 2 L s 1 5 7 u J 2 V C l D lL I L b ro J T LATC UA 5 0 L_O Tt_O SGO...

Страница 122: ... C76 81 0 r 1 7 U24 I I U22 1 c v U34 U45 us U39 U48 U46 U44 Figure 9 3 Scope DVM Control Module Parts Locator R62 R70 A71 U47 U49 U43 8 ED R168 1 1ID u o U52 C37 U61 U42 U41 U37 I U11 03 U56 I U12 U13 0 0 8 U55 c BEJ C23 C19 Ll U9 I ...

Страница 123: ...VL from the front panel is compared to the AGC voltage When the AGC voltage fall below the squelch level indicating a strong signal the SIG PRESENT line is activated With the SIG PRESENT active the audio is allowed through the select switch and the signal present light on the front panel is illuminated To warn the operator when the IF input level is beyond the linear range of the IF amplifier the ...

Страница 124: ... the Scope DVM Control module 10 11 Alarm Generator and Audio Amplifier An astable multivibrator operating at 1 2 kHz is the Alarm Generator The Alarm signal is controlled by the processor and is summed with the VOL CNTL AUD RTN signal at the input of the Audio Amplifier The SPKR AUD output of the amplifier has 0 5 watt capability and is connected directly to the system speaker 10 12 Module Contro...

Страница 125: ...R __ __ __ j 0 V AGC Ull 12 28 _r__ 1 4 lVOL CNTL AUD I 62 61 P1 SQUELCH LVL I I _ I_R_F_L_C_H_A_D_D_ 1_ 3 _________ I RF LCH ADD 14 55 1 I 47 RF_D _A_T_ A_B_U_ S _ _3_________ U 1 24 CONTROL LATCH AGC AMPU I I so D E T L ___ _ __ __ _ I I _ __J I I IF O VLD I I I I l 58 I I I SIGPRESENT L L L 1 5 I I I LOG I SPECT ANA VERT 1 AMPLI 1 DET 1 1 U1 7 18 26 27 1 r 1 MM GEN U20 I VOL CNT 0 U1 9 L 1 1AU ...

Страница 126: ... 4 wt f O l L C A A4 TOQ err t N t oo U F A Lt l JD lC TO ae u z lN T I JA L IA 1 l E i I ru s o ooo C Q o P N 4at e44 A O o lc va c o _ _ M l itJr 11 JC14001 itJ C l 40 5 4 1 NIC I o00 Go 3 I 7 A 40 I t 8 1 2 4 U I 40 C 4 S 1 4 J f 1 0 t e I L 4 Uo YZ 4C s A o G O 4 f l l 7 o M l 4 l t b CJ 40 1 8 5 4 1 40 70 74L I74 7 I L I4DGM 4 Jo 40 W 73 MC I 7 oo C 4c 3 lll V G t 4 L M A L o n4 ve M 14042 G ...

Страница 127: ...I C9 ___ cl_ _ _ R91 C 3 c86JEJ D oo1 C84 Ul7 c FL2 fll DIJ C81 U4 C44 RF1 RF2 Figure 10 3 Receiver Parts Locator Sheet 1 C87 CXl C5 c 001 Cil9 U18 I C94 us U3 c C95 U26 I C70 U23 U24 C69 L 19 I Cl01 ...

Страница 128: ... appropriate frequency source is switched to the SYNTH RF output by the Output Select switch 11 4 A basic flow diagram for programming the RF Synthesizer is shown in figure 11 2 This diagram includes generate and monitor considerations wideband amplifier control and modulation control 11 5 310 440 MHz Phase Locked Loop A single 310 440 MHz VCO is phase locked to the 100 kHz reference input using a...

Страница 129: ...control provides programmable gain control to maintain constant sensitivity at the FM MOD and SWEEP inputs Additionally the wideband modulation mode requires again of four beyond that for the narrowband mode Thus under the control of the processor the Modulation Control selects between the SWEEP and FM MOD inputs provides gains of 1 2 4 and 8 for the FM MOD input and gains of 1 and 2 for the SWEEP...

Страница 130: ...6 I FREO I DET U128 L 1 550 MH Pll LOOP FILTEA 5Sll MHl I CO U204 1 U203 I 1 1 PHASE rG I L_____ _ 10 M Hz _____ t __ t 1 FREO s t 1 I OET I U202 500 1000 MHz 250 500 MHz 550 MH2 0 01 250 MHz U206 SYNTH SWP SYNC SYNTH 1 KHz 1 SYNTH 5 KHz 1 SYNTH 10 KHz 1 SYNTH SO KHz 1 SYNTH 100 Hz SYNTH 500 KHz OUTPUT SYNTH RF SELECT CR206 208 210 212 223 226 K201 5 6 7 8 3 4 15 16 11 12 9 10 13 14 J2 JI_ A L C V...

Страница 131: ...250 500 MHz OUTPUT CLR 500 1000 MHz O UTPUT SET MOO X 2 F1 000 f i MFREO SET 5 Jl IOO OUTPUT F 2 F100012 Cl R 250 3 0 IA Hz O UTPUT CL MQO X 2 F1ooo PGM FREO 550 MHz CLR 500 1000 OUTPUT SELECT 700 1000 MHz VCO NO YES SELECT 500 700 MHz VCO F 2 370 MHz YES NO CLR 500 1000 LOOPINV CLR MOD INV F310 440 FT2 60 5 MHz SET 500 1000 LOOPINV SET MOO INV F310 440 F 2 60 5 MHz lNTERGER 20 F31 1 0 J N3t0 440 ...

Страница 132: ...40MH z vc o T_v_ I _ D Mh i E l EGo F 1 I QD 310 44 0 Mh z l9 E 0 Sv E P t E 2 CJ El GoO Ml 1 REF G 0 5 M t vc o T V y_ c E L 2 E 18 ro s 1 11 h_ i SV 3 E Z 0 5 h H MI E C I r u SCO DDO Et JI BLIO IEL 4 t 2 5 500 v 7 ENA E t o 0 SB I c z S JTWE SI LEQ C F FM SWE EP J E S I C 3 JO l ll V IW v o r I C 4 GA 1W I C 5 i __ J T ___ SO 700 IV H E JI J Uo o I ___7 M 00 I E E P itJ 1181T I C6 A LC VO Tb SC...

Страница 133: ... s 1 1 _j _j i t Figure 11 4 I I d A5A1 Digital Synthesizer Car gram Schematic Dla RTC 4009A ...

Страница 134: ...00 a t_ r CI 0 1 1 t t _e t 1 1 1 TfS f Ne l l vJrr _ L J s C t e r l Ot 1 Z J10t C l e no J tOolOc 1 1 4 40 0 0 I 10 0 Tl w t u10 7 V utoe o o e c ll tO t u t O Tl 4 t A lAOE J ol lt CS 4 ft oo V 1 1 3 A 4 U1 4 wv7 or l tl c A l V l IC wC t O 4 V c Ot t t t6 M t 7 IJ t v d qe tUG of S T USEO C397 qor tta t ZJZ C At l c at t TMA t O t Ot Kt Ot l lt H L 9 Ot3 A t Zc z eo 7 s A 8 8 loCo 04 4 14 _ l ...

Страница 135: ... o J _ 1 SJ LJ C2 J 3 I z k J 500 COM 11 fl G esc _e u 2100 14 In Figure 11 5 RF Synthesizer Card ASA2 Schematic Diagram Sheet 2 of 3 RTC 4010A T Q t 1 1 Q1 10 1 1 C 9 Z S P I 0 7 9 oOO i C M I 4 1 0 ...

Страница 136: ... I T cz4 2 S l 5C O M TO 9 9 9 Vt t _ 9 t 2 2 0 T 1 2 _________ _ l 2 o e 0 e r 7ot EG oR 0 C l4 1 0 o T 3C O P C R O O o lt e o o t TO 1 1 M o CD s CD s q1 1 L 3 CQ J t 17 l Z l Figure 11 5 RF Synthesizer Card A5A2 Schematic Diagram Sheet 3 of 3 RTC 401 OA ...

Страница 137: ...111 U129 U130 U134 Figure 11 7 Digital Synthesizer A5A1 Parts Location U102 U103 0 a a 0 U120 R169 C170 U136 U135 U137 U110 C142 c J 1U139 0 U112 U123 U140 U113 U114 U115 U126 U141 U142 Ul43 U14G 00 C169 8 u C107 00 00 B r I C101 U127 U128 U144 U145 ...

Страница 138: ...1 1 tJ r 1 U213 U214 Figure 11 8 RF Synthesizer A5A2 Parts Location O L24 l C387 C385 0 0 EJ 0I I R261c J OJ 0 CR212 CR211 ...

Страница 139: ... J2 J I 8521 52 ...

Страница 140: ......

Страница 141: ...ime and thus the final output frequency A 20 Bit Adder adds the control word to the current word in the 20 bit accumulator Latch At the next increment time the Adder output is latched and becomes the next input to the Adder 12 5 Conversion of the linear digital output of the 20 Bit Latch accumulator into a sinusoidal dig itaIoutput is the function of the Decode ROM A Digital to Analog D A converte...

Страница 142: ...osite modulation audio The composite signal is then routed to the Scope DVM Control module MOD CAL AUDIO for modulation determination to a buffer amp which drives the front panel modulation output MOD TO FP and to a Modulation Select Switch which routes the signal to the desired modulator 12 13 Modulation audio is switched to the speaker VOL CNTL AUDIO for any generate mode to the DSBSC modulator ...

Страница 143: ...DTO FP MOD CAL AUDIO TPI PI 1 I I I I I I I I I I I I I I I I I I 47 48 51 52 55 56 59 60 61 62 43 44 49 50 104 857i I I IPl GENERATOR KHz U19 I I CLKGB tll I TP2 I I y I U6 r _j PL DPL NT MOOIll 1 I 25 26 I I I r I I I I I I I l I I I 6 I I___S Y N T Hl K Hz 1KHz 41 42 1 BP FIL I I I U4S MIC IN 11 12 __ _ __________________________ IDC EXT MOOIN 1 3 14 1_ t OWL CLK I SEL I I TP 3 U8 I y I SHIFT 2...

Страница 144: ... 1 CA1 1 00 T b n P b eu 2 e I I r Figure 12 2 Y07 Audio Synthesizer A6 Schematic Diagram RTC 4011A ...

Страница 145: ... C39 C56 ill C40 It N U33 U34 E B L TI lCs3J CJB Figure 12 3 Audio Synthesizer Parts Locator U39 U40 U42 IJ43 n I G r a 8 8 I L2 8B B 8 E F l CJl 1 El EElJ I c I I __________ ...

Страница 146: ...ne address as there are bus enable lines The system utilizes one RF bus enable and two AF bus enables for a total control bus capability of 192 bits The second bus enable for the AF control bus is on the processor card 13 5 For internal timing on tone sequences the processor is interrupted every 10 msec When interrupted by the timing input the processor stops it current process acknowledges the in...

Страница 147: ...YNTH 1 kHz signal is the reference input for the generator Selection of the gate time is by processor control to give a five digit or 0 1 Hz resolution frequency display 13 11 Zero Beat A zero beat with the incoming carrier is obtained by successively mixing the 455kHz IF BFO FREQ with 500kHz 50 kHz and 5kHz The beat signal that results from the mixing drives the ground return circuit for the sign...

Страница 148: ...0 I RIW I I I I I DVM FREQ I CNTR PIA I I I U2 I I 3 I DVM TO AI D I I Ut END START END START r TPl I 7 30 I I ABS L VALUE DECODE US U29 A 0 1 t lI I J CONTROL LATCHES U6 7 SIGN BIT IEX TFREOCTA I TYP 4_____________ U1 7 19 I 61 63 I EX T FREO CTR I c TR 1 10 1 c SELECT N ACCUMULATOR I DVM NTR I I Sw U9 3 CONTROL BUFFER 59 OFFSET FREO 1 r ____ J _ 6 5 1 1FIBFOFREO I GATETIMEI J _ U15 17 I T GEN I ...

Страница 149: ... T lA C 0 ll l4CH l l SOO IWC IH 3 CHU IIIQ4o i l SQ 017 l UU Lu r tKttl a IIQ So0 IIIQCHIJ 7 tLU tl C1 114 IIICl ou LW O O lliiiJ t u C c C l C2en R C2 CP i Q9 U 2 B t o c c z 0 1 c s 1 t l QG 1 3 0 C o Lc_ 14010 I U 2 D I 14o1o r _ r 1 N r r L 0 0 L A W l 4 r 1 I _ s t M r 3 2 Y J zll I I 1 r HI l 7 llL _______ TP3 v 1 L ll I 1 9 z I i J N U r Q p o Q o A o LJS 10 140 13 II l 12 5V sv J I Z V C3...

Страница 150: ...1 L 1 _______j__________ t___LJ OSD 0 z 1 311 I O 4 1 87 5 u o i PM H L NTFC 2 T 821 l l s t 0 _2 DO t 1 L o l t fc t l u o3 0 1 D4 05 5 D t 7 1 CA2 c A I AC sc t I SI _ __________ l Z l s l4 E 3 E RN Q w RC x I IESET G P80 r o s e o I Z P6 l3 83 l4 F M rs 2 es re 4 6 l i f S7 I8 PP O l PAl 110 PA ll PA i l 4 lo _2 A S I r P o C I 15 J PAi 12352 7 lfl 02 b3 04 lS DG AQ A I l p _ TFC l IK C Z I Pts...

Страница 151: ...W iCR2 145 l 5V s v 9 R LD I 101 2 K I u J Cl 4 0 I u v z a za 1 0 1 IOK 5 1 v S 5 15 r _j r 10 ocT Je w Q 4S 1CK lPG f J JJ 1 C 21PF Q 4 ofd l _ e It iPC T R 2 00 1 t o R IG 51 3 o 4 N I 1 d 9 w Q 6 r l 1 h lflQ 1 4 JP M 4 C TR 14 5 S P ARES Figure 13 2 Processor 1 0 A7 Schematic Diagram Sheet 3 of 3 RTC 4012A ...

Страница 152: ...I U29 0 ill ro I U26 MD l liJ G G C34 22 P rts Locator Processor l 0 a C22 I p U 22 l U 21 u 1 8 U23 U20 I E U19 I UlB I Po Ull I I E U9 I U15 U17 U2 l UlO p U16 0 Ul PB U5 I Po U12 EJ I l l U6 18 88 ill C TI 5 IT I p j U7 CEO U3 ill I ro U14 I B ...

Страница 153: ...ator is programmed for unity gain sothattheAM MOD DC REF I signal from the front panel RF level potentiometer controls the RF output level 14 4 For the IEEE control option a electronically programmable RF step attenuator is installed in the system Control of the attenuator is then from the processor through the Address Decode and Control Latch circuitry on the Interface Module 14 5 Modulation Cont...

Страница 154: ...8 __ BUS INTERFACE i I l r RFLEVELcoNT I I U24 34 44 I SEL SW AND 51 64 65 AM MOD DC REF 0 Pl I PRGM I ATTEN I I 4 L J I r MoocoNT 1 I I I SEL SW U27 37 47 I I AND 52 66 67 INT MOO RTN 0 I I PRGM I ATTEN I I I I I I U26 36 46 I I SEL SW AND 52 66 67 EXT MOD RTN 0 I I PRGM I I ATTEN I I I I I I I U25 35 45 I SEL SW 52 64 65 1 KHz SINE RTN 0 I I AND I PRGM T I ATTEN I I I I J 42 36 30 J1 10 DB 20 DB...

Страница 155: ...o __ t f fl OER 1 9121 I 8 S S S 8 Q S S 8 9 I lc 2 1 1 T J f e 141 jrt lir1 F 1 14 11 l l ll 1V 1 14 1 rl1 IOr t _ f 0 r _J p __ L lt 82 ll l g l i U1 1 LA r G 1 1 lA it W t 4 1 74 l4 9 UIO 1 4 VC C C OQ V 2 UON l tt A t l14 L A T w V 4114 8 lS2S It II 10 l l 8 12 Z j U l l ATC 4 C l4 14 8i S 2 1011 1 u o ow o V L _TC 1 IV I4 14 8 7 19 f i22923 h II I L4 82 28 u 2 LA 1 MC 4 f 1 A s 2 e F 1g SIS b...

Страница 156: ... _ Module Parts Locator 11 1 1 1 0 9 I I i Jl J I s w 0 4 Jr il lJ 0 0 0 0 0 0 0 r o o o o a o o o a o o o o 0 o o o o lllllu u11111111111u 1il1lttiiuniti111i 11J1iI Hiffi TPO __ _ C 1 t r 7 I P ...

Страница 157: ...he IEEE option detector input IEEE OPT DET the AF BUS EN1 signal line and the nonvolatile memory NVM Data that is to be held during power off is stored by the microprocessor in the NVM Then when power is turned on the microprocessor reads the contents of the NVM to obtain its start up mode the RF and tone memory presets and the rest of the preset data If the operator changes a preset the microproc...

Страница 158: ...d by the CHAR LATCH signal A Character ROM decodes the seven bits plus a three bit ROW ADRS to determine the dot pattern for the current dot row scan position for the character to be displayed The dot pattern is then parallel loaded into a Shift Register and clocked out serially to give the CHAR GEN Z AXIS pulse modulation sequence It should be noted that each character line on the CRT is scanned ...

Страница 159: ... CLK GEN U25 29 30 U22 23 CHAR LATCH BIT LCH U24 CHAR ROW ADRS ROM IK XP U2 0 DOT CLOCK SER SHF REG U9 PIA y ADF J DATA U1 1 15 21 BFR RAM u18 19 1K X 8 AF BUS EN 1 NUM U11 13 AO A IS 00 07 HALT NMI RESET IRQ VMA E RtW TP7 TPS L_ __ CHAR GEN Z AXIS VERT CHAR SYNC HORIZ CHAR SYNC LINE 1 EXTAL Pl I I I I I I I I I I I I r I I I I I I I I I I I I I l I I I l I I lI 852 8 1 1 18 71 86 91 98 65 58 69 7...

Страница 160: ... l 2 0 Nrll uH I ODOClClDD jso tel E4 9 Bo 05 se A e 4 9f 3 5 6 l7 f I l l DO A H AIO 1 1 l f i A I I HI I A z I f f A I f f Al4 f A15 I I u l i l 1 4 OCTAL B R 2 44 J lL Ill i l I Ps 1 41 J l A fl r t t r r 01 f 1 t t DZ D3 D4 t r f DS r r Di 1 Dl N 1 1 LI t9t J I 44l t t 1 t_ DJK E 4 2 l i R Dlr31 1L fi _ s _ lll e 1 r a BZ L 1 6 1 L 1 t B L__ _ _ __ __ 7 us C A L 0 J5 k P 245 ASI f J j r r _ 1 ...

Страница 161: ... 12V r I r 1 CPI J 0 IIJ40DI CR2 I IIJ OOI Lll1 MeM 8 z 4 0 e 0 11 a E c q ___ 5 4 l _ 1 s cz tv X I I I Yl r L___ 2 1 f 3___________________________________________________________ G C __j I _ _j CO D r _L _ s d l l b a l Z D3 D4 s DG 0 7 t t Figure 15 2 Microprocessor Character Generator A9 Schematic Diagram Sheet 2 of 4 RTC 4014A ...

Страница 162: ... q I I 74 2l 2 I 17 s 10 r 5 i 9 1 13 5 7 9 1 Ir2o S 7 9 11 I covoll u IJ l lU lL l UC JJ lL _ 4 U oS 1 t O E ei R 1 lE J e e HE SI R E l COS f z C 5 2 t Z CIGS 4 cvowu rouowiL ldlODulll r 41 rort 4 1 2 1 4 1 6 n 2 t 2 4 G 10 1214 I f t 0 I j q IJ o9 I S 3 of t 4 U 3 9 e C4 I ci 4 1 4 I L II s AO AI A 4 s A A4 2 AS J A e A7 lG AS I IS 0 A0 w s sill lf 5 l ULl lU ll I E t Ul Tc2s 9 IS HE 8FR 2 0 R ...

Страница 163: ...IN C1R U l D 3 04 QO l 2 M l Q I r4 1 TP3 Q 2 f 5 r I 13 3 I 2 AI 0 II I I I t 11 11 l l 1 l 1 t 54 c L J _ __ __ _ _ _ _ ____j z _3 f _ _ z J r 1 3 Sl N _j L 1 7A _J 0 4 I SH I 5 3 P L 2 51 l _j LJ t t 4 _ MJLJ 3 1 t 51 13 v J c 1 l 2 2 gi l z 10 11 oc u 21 C I IAR S I JC loiORIZ _C v T I 5 P ARES 5PM E COt JioJ PlioJS 14 THaO I t 1 V 4 I 40 o S S ll H U 5i AT D 0 IOS B 3 V F1gure 15 2 Microproce...

Страница 164: ...N 0 tG U24 U27 U20 U23 G U35 U22 L B v v C J v cp I U10 UJ2 U29 UJO U33 U36 us U7 UB Ul U5 EIEIG I IOO EJ C6 0 N u 8 8 10 C 9 8 8 U34 U9 U14 U16 U17 U15 G 8U2 U3 U4 U21 U19 U18 I A16 I G0 e B F19ure 15 3 Processor Module Parts Locator ...

Страница 165: ...e CRT heater drive 16 3 The 2 kV is regulated by comparing a sample of that voltage to the 7 9V REF signal The resultant error signal HV CONTROL controls the level of the DC input to the high voltage transformer 16 4 A Bias Divider circuit on the primary center tap provides the operating potential for the Q4 Q6 drive winding in the low voltage power supply 16 5 Intensity and Focus Control An 87V z...

Страница 166: ...12V TO HV SUPPLY P3 6 INTENSITY T V_ P3 8 FOCUS T V CRT Z AXIS P3 9 87V r f t i i U302 0302 INTENSITY MODULAfOR i FOCUS MODULATOR U301 0301 CENTER TAP L V XFORMER H V CONTROL HEATER CRT HEATER CRT CRT ANODE 4000V CRT GRID INTENSITY SAMPLE CRT CATHODE 2000V CRT FOCUS FOCUS SAMPLE HV REF P1 6 P1 3 P2 1 P2 14 P 5 P2 3 P3 5 f 2 2 P2 4 P3 7 P3 10 8521 28 Figure 16 1 High Voltage Power Supply A10 Block ...

Страница 167: ... Voltage Regulator Power 1 A10 Power Supp Y High Volta e Parts LocatiOn R216 A10A1 I A 114 1 I EJ C C115 R106 I c Cl ll R173 I _ _ CllG Hliig n Voltage A10A2 Regulator c CJ02 I AJOS I__ CJOJ _I trol A10A3 Focus lnt Con SCOPE ZAXIS I I I ...

Страница 168: ...4o o i 10 _ 1 jE R l_ tt T O I I 01 P0037 7o JOO I I I 9V R I __L___j F I oc euss 1 1 1 l 2 7 Pt JOOV pz E T q J PL t w tr lEG I I I I I I I I I E Y I P 8 1 14 5 V ER 1 b iFl L It TE I I VE T Ce FL p _A E IOI 1 4 t Et L l l t I I I HOf 11 DE L PLJ TE I IP3 2 I I Go 0M lp 3 A 1 o jGTGS I PA Tlt L Q G IFC Q o E C 6lo olo O c Q S J f OQ VPI _ tTE 0 lA T E t oA 0 2 OC l Qt EQ loo cog _ O l PD04 I W 3 ...

Страница 169: ...Figure 15 3 High Voltage Power Supply Parts Locator ...

Страница 170: ...leveling loop are the input VCA Voltage Controlled Attenuator the output level detector and the level comparator A level control voltage proportional to the desired output level is compared to the actual output level as determined by the level detector The result of the comparison steers the VCA maintaining the detected output level equal to the requested output level In the generate mode the cont...

Страница 171: ...m the wideband amp which is already offset by 10 7 MHz with a signal frequency from 10 7 MHz to 0 7 MHz or 34 3 MHz 17 10 For the 34 3 MHz mixing signal a single VCO is used Tuning of the VCO is with the OFFSET FINE TUNE line from the front panel Frequency modulation of the VCO is implemented by suming the OFFSET MOD signal with the tuning voltage 17 11 For the 0 7 MHz to 10 7 MHz mixing signal a ...

Страница 172: ......

Страница 173: ...Figure 17 3 RF Input Module Parts Locator ...

Страница 174: ...ARSE TUNE 45 MHz OFFSET EN 0 10 MHz OFFSET EN Figure 17 1 RF Input Module A11 Block Diagram I STEP I ATTEN I I I I I I I I I I I I I I FL20 1 02 WIDEBAND AMP AND CONVERTER C228 229 L 12 M201 K l L I 10 7 MHz I r cR I 10 7 MHz BP l BP 212 II FUR 0211 L 3 II RLY 1 ORVR I c L209 10 MH ISO I NET I I l CR206 208 205 A VCA v v I DEl CR217 I U208 I VCA J SELECI 7 v II II ALC LEVEL CONTROL REF SEL rGEN tJ...

Страница 175: ...E 31 W A TTM TEt C ONl R Ol I I i UH L Rl I PU A t jO W Titv BE l I PF r l r 3 t o e 0 32 A I _ VOLI t G E At t IER t t _ D MOO 1 E v c _ I r SOOOPF F t A I A 1 OI SE T OU P 1 V 2 3 I E t1 E 4 0 OI I SE r C E W R c rot L j 7 C TPU TO I I C I r c E I E 7 EIS E l9 EW E Z l 1 V V 1 1 TE t SCOO L __Yr r r lSUH II PF J pI 7 l JP J P O TI C T 1 J L o r r t t t t r 1 o VE 5 L soooPF S3V r r t r C t L _ _...

Страница 176: ... I R133 I R102 Ill CR101 I CR1120 D 0 J2 SPARE R103 J l CR109 C102 Power Meter Protection A11A1 c 1 C110 j C112 a C121 AT2 U101 c 1C116 u L r C1l5 C118 C107 CA110 o __Jjj C1090 ...

Страница 177: ...Q ci O IK L o MStnO R o 9 2 09 2 200 PF Rol 4rK 1 2 2 1 00 OOO Io J 1 I 5 I R l 27 10 Rl4 3 vvv OFF SE T CI S 41 UF I I IOf l OlE 8 R t e 101 1 1 PA RiiJ L I E l RE C E OE S TIQ 1 5 RE 51 lOW 1 FOR C OWIP E TO DE S S l 0 0 1 1 WI T I l lb I A I Z FOR RE FE Ra J C Q vl l 16 ReF TO P 01 POO l I 00 JS 3 UI J 6 5 oi ER VI SE C FI v A L E 1 1 0 0 IV S PC T 1 4 WA T A LL C o PAZ 1 0 Qt 1 1 Ul 1 LL 1 10 ...

Страница 178: ...6 B R110 C3FS CS G Wideband Amplifier A11A2 rn C1 C27 C30 0 0 0 R38 R41 C26 5 U2 OR R5 N a a a a R2 I R4 I LS OOCRl QQ R63 OR68 oVR1G D 0 013 0 A62 Q O R 3 0 R24 0 R16 G oCR lO R2 R40 3 CR7 Ill I R59 I C42 I I R61 G C35 I R60 I j C44 0 8 U3 R51 Offset Generator A11 A3 ...

Страница 179: ...I IE l 0 01 E o J I Q 0 lE t E 5 Gol JA liO 1 1 1 I IA t 2Z to CF C c TO p _ 1 G0 9 1o l 3 lj LJ R 1 IE LI j 71ii O Q _ o L J U j C Q a 1o l 0 li J 15 1 J rb Ti t l _ l _l i l LI RE llo l Ll lhlcx C T I f A o l U 4 o _ rtl c o iit oc _ P Ui OSE C l li J T A A l JC E l o t a flFG Pe l E l L _ Figure 17 4 Wideband Amp Card A11A2 JS c l lV 17 1 3 1 1 5 4 11 ...

Страница 180: ... Z T e B A to Jt t o ct a r occ a ec Eo t tL OW c tQ 10 v e e t E D TE Figure 17 5 OM 6 00 O Cl t1 0 C111 o f T t JO T v 0 95 63 1 0 q J I s 1 20 7 u i oa v Q30 Offset Generator Card A11 A3 Schematic Diagram RTC 4016A 11 10 A O GAl M E t R 0 3 1 9 0 _ I CoO l I f pc t l G l 0 c o Q I ZOO oo C q L z OO F 0 2 1 00 o Ot II YA _U 03C P IAMII 1 c ooP c Tu l o _________ Q D l o o 9J I O CSEY o J rPI rl ...

Страница 181: ...equency Counter Preamp has sufficient gain for 30 mV rms sensitivity and provides hystersis for noise immunity 18 6 Scope Vertical Preamp A calibrated gain of 50 or a variable gain from 5 to 50 is provided by the Vertical Preamp The gain is controlled from the front paneL For vertical scope positioning the DC bias point of the preamp is controlled by the front panel position control Deflection sen...

Страница 182: ...BUFFERS us ADRS DECODE I c T EXT IN 1 3 4 I I I I 1 2 I I I I I ACIQC I 4 INT SC OPE TO RNG SW I I I I I I I I VERT P S 4 1 1 VERT GAIN s VERT GAIN RTN I s l IIJ16 22 l 1 S 8 t 1 3 b _4 T CHES DECODERS 1 0 LED ORVP S g II TEN CON J I I i T _ R 9 4 KS 8 07 _ lPI RANGE _r_ ATTEN I 03 4 H IN 1 XT U2S O VM BUFFER u24 D1 5 FREO CNTR PRE AMP 08 11 SCOPE VERT PREAMP U27 DISPLAY LED S FUNCTION LED S MOOUL...

Страница 183: ...Intertace Module A12 Schematic Diagram Sheet 1 of 2 RTL 4045A C Tf o to R crE J C o c b iO O J t GI O e t oo T O 1 4 e Y2 2 C o RC o JL C C C S TO L S I O Po04 l1V 9 S 0 1 lol s l V l C lC EC Q i 1 QIIS o o l 0 J S 1 4 vJI 1 G PA C TQR Io c R _ JC l tOI X O R 6 c l U _l o O_T 4 A t l 0 4 1 0 0 0 VUA I 10 c teA S o b I lR N IJR M P 3 iii xt 0 C O C O L IO CO O t 7 0 19 T J I u l W oOII fl G I t X _...

Страница 184: ...l A T f E J C 0 T iO Figure 18 2 B 6 B 1 73 1 2 1 2 73 8 B El 8 7 i t a 8 Rg t sY 14 9 3 l ll 4 1 R 5 1 9 g 9 ii t II I C 14 IG IC 1 0 1 1 4 l l 4 1 1 9 4 I Tl l J Z O 4 1 1 tRU 4 0 3 9 2 u S G G 1 ic I Front Panel Interface Module A12 Schematic Diagram Sheet 2 of 2 RTL 4045A ...

Страница 185: ... e Parts Locator 2 0 Cl3 0 R61Q R64 U24 l 1 1 U9 L J _ L _ L c Rl07 I U26 0 N u R21 I I R 9 I I R20 I I R23 I DE A25 R27 A91 A17 R3 3 R3Z R2 8 11 U19 I l U20 I MJ a a a a U14 1 0 I U6 I Ul U10 UlS IEn Ul6 ll U12 U21 IE D U17 I U13 I I us u l U15 Ull U7 us u u l 1 a 0 a I _u3____ U4 R 3 R14 R16 R15 U22 ASS R87 ...

Страница 186: ... oven draws high current As the oven warms up the current decreases reaching some low valve when the operating temperature has been reached A current detector illuminates the oven ready indicator when the current has decreased to the stabilized valve The indicator is continuously illuminated with the TCXO 19 3 Internal External Switchover With no signal at the external10 MHz input jack the interna...

Страница 187: ... IN T EXT TCXO SW ITC H OR ovxo OVER J u I VOLT OVEN SUPPLY REGULATOR A 0 OVEN IND D RIV ER 2 r E ORIVFR SYNTH 10 0 MHz J1 EXT 10 MHz OUT J18 LEDANODE Ell LEDCATHODE E12 8521 21 Figure 19 1 Frequency Standard ModL Block Diagram ...

Страница 188: ...ency Standar 3 Frequ Figure 19 Locator Ir 12 d l 0 i 01 i I I 1 1 I r8B Gt U2 d Module Parts ...

Страница 189: ...111521 53 ...

Страница 190: ...______t 4 JI _ 1 0 M t S T D TO C SYI lil 1 0 1 L 3 A PAC ITORS ARE ll l Ul UWLE C 5 O TE D 4 R S ISTOt S O RE 4 W UI JLES OTEO EIB 1 1 Y 10 M l 5TD Jt8 r OVC 1 1 10 0 AI JODI E 3 r O Vtl l i tD C A n J OOS OVEW 0PPLY r r1 f 4 10 A 18V E It I GWD l r 1 r B r wl r 4 rz L_ R AJ 1 9 6 01 JtOL F MJE700 I Q I 9V Rtl 2 700 t l 2 zoo I tOM t Tcx o oc o AI A 2 L ____ J jf 3 001 E I 7 LJ E IJ lM C P l o I ...

Страница 191: ...10 0 0 CIIO C OQ WI a O l 1 00 001 _ C ZI V A _L 1 00 _ __ _ _J_ __ __ J tOO I L J Fi gsr ro2 1 Front Panel A14 Soheimatlc Diagram Sheet 1 of 3 0f 80304A42 I Y SO I Qow V BOA R C N Q veco QO LQ uiV 0 I EV904 C CO Jv E 6CO C CJ Jv o J 2 t f e O O Go lM l I I 7 I I ll I I I q I _ __ __ I ffi t Jo G r hl c c _ t r L 5 0 0 1 I q I o P AY FU Cfl o J o AC I H I o I t 1 I d d 1 _ 1 o I 4 Q Q c c I I Hj 1...

Страница 192: ... iND S v p 01 M iz 11 JO GE t J I MOJ J v TR D 1 0D NO 5PEC T A Wb L lh lD oc DPLX 68 JD Rl M l 1 10 0w M i V NO 1 2SQ C TR INw DJt lt 1 JD E X T f 6 TT NO SCOPE SC O PE _ t _r IF 1 lD __ oo E LE D 6 E l LG CAT lOvE G I s I I 4 3 I I 2 I I 8 I I L9 I 10 I II I I 1 2 L l3 I T I 14 I I 5 I t I 17 I 16 I I p I 20 I 2 I I I 2 2 23 I I 24 I 25 J ZCP 29 3 l DS5 DS t 057 D 8 DS DSio DSII DSl2 I DSI 0514 ...

Страница 193: ... I r T L f L W J J J __ _ J _ i I t I 1 r t p tt _ _ j l 1 I t I Figure 20 2 Display Board A14A1 Schematic Diagram 01 80304A43 ...

Страница 194: ...36 OJ 80 1140 ...

Страница 195: ...p a26 I I I I L _ r ...

Страница 196: ...additional cooling for the system The blower as received from the factory will run whenever the unit is connected to the AC line However a jumper shorting out a thermostat in the blower assembly may be removed so that the fan only operates when high temperature conditions exist A schematic of the Blower Assembly is shown in figure 21 1 21 1 21 2 ...

Страница 197: ......

Страница 198: ... Value No Req 001 MU2A1 FAN 002 15 P00257N001 CASE HOUSING 003 3450 87 239 THERt 1QSTAT 004 477712 FILTER ASSY 005 32 P06859A001 GASKET BLOWER 010 206429 1 CONNECTOR JUMPER r I I I I TO 1 o 0 j I MAIN 2 120 VAC CHASSIS 3 FAN MOTOR BLOWER 4 ...

Страница 199: ...r this application should be capable of reading and writing ASCII and control characters from and to the bus in accordance with the 488 specification Application software is the user s responsibility as dictated by the controller selected although interface and application assistance is available from Motorola 22 5 The IEEE option package consists of an IEEE Interface module A8 with a rear panel c...

Страница 200: ...seconds 1 10 100 microseconds External decimal enables display of Input Power Meter operator messages on CRT Frequency Error display in a transparent ter minal mode Deviation or 0 AM or Function Mode FM Note 1 cw AM SINAO Reading returned as External OVM AC or DC displayed on screen Note 3 SSB DSB External Frequency Count SWP 1 10 MHz External Power Meter FWD REV SWP 0 01 1 MHz Code Synthesizer Mo...

Страница 201: ...e bus have released the line Thus the slowest device on the bus determines the transfer rate When the NDAC line goes false the source devices sets the DAV false which in turn causes the acceptor devices to set the NDAC line true When the acceptor devices have completed processing the data byte just received they allow the NRFD line to go to the false state completing the handshake As the data tran...

Страница 202: ...A 3 Tom B I 4 AlB 5 Tor qemote kH I c External od Level I FM r AM kHz c I kHz Mo Level FM AM kHz FM c Code Syor theSIZt r AM Mod Leffl OSCI LLC SCOPE c Horozont a Sweep Select 0 1 m cro sec div 1 10 r cro sec div 2 100 m cro sec div 3 1 r ol i sec div 4 10 moh secldov 5 100 rr o lli secidiv 6 Exter1al c Venical Garn Sefe l 0 10 Wdiv 1 I l d1v 2 0 1 V dov 3 0 0 1 YfdtY RECEIVEA c Hogh Image c low I...

Страница 203: ...Wattmeter 22 17 The data field is comprised of five sub fields as shown n n E n I DATA SIGN I I EXPONENT EXPONENT MAGNITUDE DATA VALUE EXPONENT SIGN Data limits and accompanying units are given in table 22 3 The data field is optional or not allowed for certain commands 22 18 Data Sign The data sign is a single or character indicating the sign of the data value The sign may be omitted for positive...

Страница 204: ... acquire the designated reading These states are listed in table 22 3 The measurement however is not made until a trigger command T has been sent from the controller The trigger command causes the measurement to be made and the data held for transmission to the controller Then when the controller addresses the analyzer as a talker the data is output to the controller A reading can be retaken for a...

Страница 205: ...s are sent The down cursor key causes a bus service request to be generated regardless of the operating mode Thus this key could be used to halt an automatic test sequence 22 39 The remaining pushbuttons are defined prior to entering the terminal mode with the use of the keyboard control commands listed in table 22 3 Each key is assigned an ASCII character by following the Kn command prefix with t...

Страница 206: ...27 39 G 01000111 28 40 H 01001000 29 41 I 01001001 2A 42 J 01001010 28 43 K 01001011 2C 44 L 01001100 2D 45 M 01001101 2E 46 N 01001110 2F 47 0 01001111 30 48 p 01010000 31 49 Q 01010001 32 50 R 01010010 33 51 s 01010011 34 52 T 01010100 35 53 u 01010101 36 54 v 01010110 37 55 w 01010111 38 56 X 01011000 39 57 y 01011001 3A 58 z 01011010 38 59 01011011 3C 60 01011100 3D 61 01011101 3E 62 01011110 ...

Страница 207: ...r must then be programmed to recognize the error message and to decode the error number A successful data transmission will send back an error code 00 when addressed as a talker The controller should be programmed to ignore error 00 and to display any other error to the operator Of course if a valid output command followed by the trigger command was sent the talker address will result in the reque...

Страница 208: ...S3 FM 2000 Hz 3 kHz FM Tone B CFAB2000MM3MS3 FM 2000 Hz 3 kHz FM Tone Remote CFAA1 5E3AB300MM5MS3 FM A 1500Hz B 300Hz 3kHz FM A B Standard Sequence CFAS4AA1E3AB2E3MM4MS3 FM Sequence 4 A 1 kHz B 2kHz 3kHz FM A B User Sequence CFAS5AA1E3AB2E3AW1 FM Sequence 5 A 1 kHz B 2kHz AX1AY1AZ1MM4MS3 1 sec on off times 3 kHz FM 22 49 Modulation The system analyzer is capable of modulating with three simultaneo...

Страница 209: ...gram is then simply a duplication of the manual steps with control commands substituted 22 54 R2002A Analyzer Configuration The R2002A analyzer lffers in configuration from the standard R2001A in the following manner A11 Module Tt e manual attenuator AT1 is replaced with a programmable version PIN RTL 4064A A new ribbon cable assembly connected to the AS module provides control signals for the att...

Страница 210: ... BY position and ac power is applied to the R 2001A the RTP 1002A Battery Pack draws de cur rent from the R 2001A to activate the charging circuit The charging circuit delivers approximately 750 rnA of current until the battery voltage reaches 14 volts As the battery voltage reaches 14 volts the current drops to ap proximately 25 rnA and the high charge indicator LED extinguishes 2 3 When the R 20...

Страница 211: ...T21 AND A 3G OHM 10WATT RESISTOR IN PLACE OF THE BATTERIES SE RB FOR 14 1 V USING A DIGITAL VOLTMETER ACROSS THE BATTERY TERMINALS COMPONENT SIDE t O CEPS 2896 0 SOLDER SIDE 80 CEPS 28 57 D OL CEPS 29558 0 SHOWN FROM COMPONENT SIDE Schematic Diagram Circuit BoardDetail Parts Location Detail and Parts List Motorola No PEPS 29554 0 Sheet 1 of2 3 24180 SK 2 N ...

Страница 212: ... 80304A72 42 82690A01 43 865080 1 80304A73 30 10310A26 29 859118 1 80304A74 10 134301 29 859118 3 120938 4 7887 64 80342A54 1 80303A91 15 10811A08 9 83741F01 42 80340A90 2 2888 2 7005 4 7888 14 80340A91 75 82566801 3 80342A46 3 138774 3 132840 4 7887 BATIERY CASE Includes CASE battery SCREW captive 6 32 x 21132 2 used SPRING clip COVER battery case CIRCUIT BOARD ASSEMBLY includes CLIP fuseholder 2...

Страница 213: ...CAUTION Jo net let a dot stay ir me place on the CR1 xcreen fur more than JO seconds bi cause it r Jill lt aoe u permarwni hum in the phosphor 2 Adjust the Intensity Bias potentiometer on the Scope Amplifie r hoard Figure 3 1 until t llul appears on the screen l U 1 1 y have to usc_the Vertical and Horizonta l po1 ntwn control Vert Hori on the fronl panel tu bring the dot tnto dw screen Then hack ...

Страница 214: ...l e t l mn trol 1 out half way i Cn r ctll O dlloscope with a calibrated E rLic l input tu Tl ti on rhe Scope Amplifier hoard Figure l 1 4 Using the fcont p1 1nel s horizontal vern r t rol ndjo t fur a Vp p amplitude on the sinew vc at I PG u With 3 V1 I P6 adjust the Hori o ont al Gaiu IJUtt ntion _ 1gure 3 l for a CH T horizontal trace of ti 1 Usc tht front pane controls lo po ition the tt KC at...

Страница 215: ... _ _ c l ____ E M _ e __ AM QEb 01213 4 Blf 65 1 Sis _MICilcW v _E _ J A l IL J2 J __Qt2 2 _ J _ _ ___ _ _ _ _ 0 J2 l8 0 R o 57 tO MUt 0 P Rl 0 P LB EL I 2 v fP R8 OVEN SEI rSlli IJT ...

Страница 216: ... uace of t Utic lh front panel controls tc po ition the trac at 1 1 eonvenient place near th center 1 f the CRT 15 0CT 57 lE 01 S t STEMS MICROWAIJE TEL 01252 376385 F l_ H I V I M III AL U ll l 2 3 4 5 6 C mnr vfod Out port lo the vertical input pon 1 nn the Sy t fml Analyzer s front panel Select Generate FM fum tion and Scop DC dis play Set the Hur iz control for a sweep rate of 1 mSec Div and t...

Страница 217: ...aa ill DElli OJSPl4Y J nYt 1 1 w _ ____ Y OC COMMUNICATIONS SYSTEM ANALYZER R20080 R201 00 CMotorola Inc 1985 All Rights Reserved Printed in U S A Motorola Test Equipment Products 1313 E Algonquin Rd Schaumburg IL 60196 i 68P8l069A62 0 7 8 85 PHI ...

Страница 218: ...rements H Error detection and readout Setup instructions i 5 A Signaling sequence mo e B Manual mode 1 f Accessing the cellular test mode 7 A Front panel control settings B Setting up the duplex frequency C Selecting the cellular test mode 1 INITIAL PARAMETER ENTRY 7 a System identification SID b Mobile identification number MIN c Forward control channel FOCC i Channel increment ii Printer option ...

Страница 219: ...x sensitivity 18 G SAT phase 19 H RSSI level testing 21 APPENDICES A Cell Initiated Test Step Definition 22 B Mobile Initiated Test Step Definition 24 C Detailed Cell Initiated Test Actions 25 D Detailed Mobile Initiated Test Actions 28 E Warning and Error Messages 29 F Manual Test Commands 33 G Epson RX 80 LX 80 Printer Setup 37 H U K Cellular System Analyzer R2010D differences 38 ...

Страница 220: ...nd in appendix H 2 0 THE CELLULAR CONCEPT Conventional VHF mobile telephone systems us1 single transmitter site to cover a given service area cellular mobile telephone system on the other ha1 divides the service area into smaller coverage ar1 called cells A cellular system consists of a cc tinuous pattern of these hexagon shaped cells e having a 5 to 10 mile radius Within each cell is a c tralized...

Страница 221: ...nel On the voice channel the radio detects and checks for the correct SAT frequency and then transponds the SAT signal on the reverse voice channel It is necessary to verify that the radio correctly identifies the SAT frequency and that it correctly transponds the signal The R2008D R20lOD again handles this verification automatically with error messages being provided in the event of11 failure Oth...

Страница 222: ...umbers for the 9 files that comprise the R2008D R2010D software can be seen if a zero key is held down while the R2008D R201OD is turned on This version number display will stay on the screen for 10 seconds then normal operation en sues A manual test mode allows the operator to command the cellular telephone with any one of the 43 com 5 mands defined by the Advanced Mobile Phone SeT ice AMPS speci...

Страница 223: ...EAD DODO DODD DODD R2008D R2010D DO RF IN OUT VARIABLE TAP RF COUPLER 58 80313837 PART OF RPX 4272A 0 R RPX 42738 RPX 42748 RTL 4137A 0 0 0 0 0 SIGNALING CONNECTION TRANSCEIVER FROM R2008D R2010D TO CELLULAR TRANSCEIVER FIGURE 2 6 ...

Страница 224: ... for the entry of basic paramet concerning the cellular telephone under test selections the operator desires See figure 4 Ent1 must be made here in order to use any of the celh signaling sequence tests Selections are stored in n1 volatile memory and are saved even if the analyze powered down CELLULAR NIT PARAM 1 EXIT SYSTEM D 00002 MOBILE ID 312 576 5444 FOCC 34 SEU FVC 1J001 2 225 3 4512 4 6 tJTO...

Страница 225: ... light will light lO The test can be started at any time Once com menced the R2008D R2010D will wait for a service request from the car phone Enter the number that is to be called into the cellular telephone Allow the NO SVC light to go out then depress the SEND key the R2008D R20IOD will receive this service re quest message and display the called address on the CRT screen Verify that the called ...

Страница 226: ... seize control of the transceiver unit by rna ing connection directly to the control pon on tl mobile unit The printer junction box cable is co nected to the 37 pin D connector on the rear panelc the R2008D R20JOD and to the 50 pin D connectc on the cellular junction box The junction box is the connected to the mobile with an adapter cable fro either the RPX 4272A RPX 42738 or RPX 4274 accessory k...

Страница 227: ...OTOROLA CT SEF IES _ 11 MOTOHOLA DT SERIES 4 1 IEC TR5Et H J SERIES 5 GE STf R USE RPX4350A AND RPX4274B FIGURE 11 MANUAL TEST DISPLAY To send the command to the transceiver unit return the cursor to the home position and enter a 2 The command will then be sent along with any additional bytes required The operator is now free to send addi tional commands or to exit the screen and measure parameter...

Страница 228: ...utput power and modulation deviation are d played for each channel tested and recorded on optional printer The following sections describe h1 to set up and operate the R2008D R2010D in 1 Auto Test Mode See figure 12 01 80356A73 25 PIN CONNECTOR TO PRINTER R2008D R2010D TO POWER SUPPLY CELLULAR RADIO 50 PIN CONNECTOR NO CONNECTION _j MOBILE PHONE CONTROL HEAD 0 RX 0 TX 0 RSSI AUTO TEST SETUP FIGURE...

Страница 229: ...s point the R2008D R20lOD is sending out an overhead message stream on the FOCC as a cell would 14 This portion of the sequence is very similar to the MOBILE INITIATED test described earlier The R2008D R2010D is waiting for a service request mes sage from the mobile under test The R2008D R2010D now will display a SEND TEL II WHEN IN SVC message When the NO SVC indicator on the car phone goes out s...

Страница 230: ...TER DEVIATION l Connect R2008D to transceiver unit via the jUJ tion box as in manual test mode connectic Refer to Fig 13 2 Select power monitor mode and execute the f lowing manual mode commands 01 Suspend 09 Load synthesizer enter desired channel 07 Carrier on 14 TX unmute 3 To check deviation connect mod out jack to l audio connector on junction box Set eithet KHz level or code synth level using...

Страница 231: ... function and execute the following marmal mode commands 01 Suspend 09 Load synthesizer enter the desired channel 4 Set the R2008D to generate on the desired fre quency 870 MHz 0 03 X channel ex 879 99 MHz channel 333 5 Select the DVM display on the R2008D and use a scope or meter probe to access the RSSI test point on the junction box 6 Set the output level on the R2008D to the desired signaling ...

Страница 232: ... 0 0 z C z m m z 0 t R2008D R2010D VEAT SINAD INPUT TO POWER SUPPLY CELLULAR RADIO MOD OUT 25 PIN CONNECTOR NO CONNECTION 01 80356A73 JUNCTION BOX DISCRIMINATOR MANUAL MODE TRANSCEIVER TESTS FIGURE 13 17 ...

Страница 233: ...tal time axis is not to scale this illustration is a conceptual overview of the handshaking that takes place in a cellular system OVERHEAD DATA lOKHZ DEV FOCC MOBILE SCANS SAT ALERT ORDER POWER LEVEL ORDER SAT 2KHZ DEV i VOICE INITIAL VOICE CHANNEL MESSAGE lJlJ INITIAL VOICE CHANNEL RESPONSE POWER LEVEL ORDER CONFIRMATION lOKHZ 0 FIND STRONGEST SAT SAT DATA CHANNEL SIGNALLING TONE lOKHZ DEV Et VOI...

Страница 234: ...der to command the mobile to start ringing 8 Power level command sent A high power level command is sent by the R2008D R2010D to the mobile 10 Power level and handoff testing normal conversa tion mode The R2008D R20IOD allows for manual power level testing of the other power levels possible from the mobile Handoffs to the four possible forward voice channels can be made A SAT drop test can be perf...

Страница 235: ...mmand sent A high power level command is sent by the R2008D R2010D to the mobile 7 Power level and handoff testing normal conversa tion mode The R2008D R2010D allows for man ual power level testing of the other power levels pos sible from the mobile Handoffs to the four possi ble forward voice channels can be made A SAT drop test can be performed 9 TEST COMPLETED 24 MOBILE ACTIVATED 2 Service requ...

Страница 236: ...e Extract mobile number and serial number and display on R2008D R20IOD Send initial voice channel designation message Tune to FVC 25 MOBILE Power up mobile Mobile performs DC power up task Mobile performs initialization task A Scan control channels B Tune to R2008D R20IOD FOCC C Acquire word sync D Receive overhead messages E Update overhead information Perform paging channel selection task A Scan...

Страница 237: ...des 26 Perform initial voice channel confirmation subtask A Tune receiver to R2008D R2010D FVC B Adjust transmit frequency to RVC C Adjust rf power to VMAC D Turn on SAT E Set DSCMM to SCC Enter waiting for order task Receive alert order A Turn on 10 KHZ signaling tone B Generate ring Enter wattmg for answer task A Maximum of 65 seconds allowed for answer Off hook mobile is answered Signaling tone...

Страница 238: ...ive termination signaling tone Check for proper duration End of cell initiated sequence test On hook mobile hangs up Enter release task A Set audio mode to idle B Send signaling tone 10KHZ for 1 8 seconds 27 ...

Страница 239: ...r level order confirmation not accepted The R2008D R2010D has sent the cellular telephone a power level command The telephone s confirmation has not been received or it has been detected as incorrect Possible causes are low cellular telephone sensitivity excessive loss in the RF test connections or an attenua tion setting that is too high on the R2008D R20IOD WARNING 3 Handoff signaling tone out o...

Страница 240: ... 50 msec burst of signaling tone 10 kHz in response to a handoff order while in the conversation mode This error indicates that the R2008D R2010D detects this tone to be outside a 40 to 60 msec window ERROR 18 Service request message invalid The R2008D R2010D has received a data packet from the mobile but it is not interpreting the received data as a valid service request message This can be cause...

Страница 241: ...2010D has read the manual bus The transceiver should return the TCL high when it senses that the R2008D R2010D has lowered the clock line CL and has returned it high after reading data from the transceiver on the manual bus ERROR 26 Transceiver not powered up The transceiver unit did not turn on or is not connected to a power source Check all power C nnections and Re Try the command ERROR 27 Trans...

Страница 242: ... byte following the command to the R2008D R2010D requires I byte additional data 06 INIT lnrtialize the transceiver unit to the following state l Carrier off 2 Attenuation 0 DB 3 Receive audio muted 4 Transmit audio muted 5 Signaling tone off 6 Autonomous timer reset and its periodic resetting enabled 7 SAT OFF 8 DTMF and audio tones off 07 CARRIER ON Turn the carrier on Transpond sat only if the ...

Страница 243: ...the home roam decision Local use mark This 1 bit mark is used to make the local control state decision Min mark This 1 bit mark when set to I indicates that home mobile equipment shall send extended address information upon origination and page response Mobile Identification number MIN The MIN consisting of MIN1 and MIN2 is a 34 bit number that identifies the mobile equipment Station class mark SC...

Страница 244: ...e channel Receive continiuous forward control channel data extract and perform majority voting or the busy idle bits and respond to status commands and reiUrn the currem state of the rna jority voted busy idle bit Reception of an INIT command terminates sequence Terminate operation off the previously issued RCVSI RCVVI WSTS or WSTV corn mand and return the data collected to the TS Enable the trans...

Страница 245: ...all contain the registration memory 4 entries of 5 bytes each in the format shown below Each group of 5 bytes shall be transmitted with the most significant byte first Receive 101 bytes from the TS iformatted as in TNVM and wr te them to the non volatile memory Activate the DTMF generator with the tones associated with the keycode given in the byte following the command Apply DTMF signals to the m...

Страница 246: ...1 2 off 1 3 off 1 4 off 1 5 off 1 6 on 1 7 on 1 8 on 1 1 off 1 2 off 1 3 off 1 4 off 1 5 on 1 6 off 1 7 off 1 8 off Leave jumpers in factory set position Main Board DIP SW2 2 1 on 2 2 on 2 3 off 2 4 off 8148 Serial Board DIP SW2 2 1 on off parallel 2 2 on 2 3 off 2 4 off 2 5 off 2 6 off Note If the printer is also to be used as a parallel printer for the R 1801A NAM application DIP SW2 I on the 81...

Страница 247: ...z at an 8KHz rate SAT TONES 1 7 KHz SIGNALLING TONES 6 4 KHz C Channel Frequencies The TACS system uses 1000 channels at 25 KHz channel spacing The mobile transmitter frequencies start at 890 0125 MHz channel 1 and the mobile receiver is 45 MHz higher channel I 935 0125 MHz To determine channel frequency use the following formulas TX frequency 889 9875 channel x 0 025 MHz RX frequency 934 9875 cha...

Страница 248: ...CH323 OFFSET CH23 CH43 CH323 r cH343 cH1ea0 CHI cH343 I I j I 11 tl J I CH f CHAN 889 9875 02 CHAN NO 5 a UYERIE I YDIC CHIUI ELI nun YO ICE F CHAN 934 9875 025 CHAN NO FORWftRD f OltllllltD __ YOICI YOIC CHII ELS CHII t LI ELl 890 19ee 910 I I 9 5 920 930 935 940 950 CONTROL PAGING FREQUENCY HHz CONTROL PRGING AND ACCESS CHANNELS AND ACCESS CHANNELS FIGURE 19 39 CH1000 960 ...

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