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Rohde & Schwarz ZPV, Руководство пользователя

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Содержание ZPV

Страница 1: ...ROHDE SCHWARZ MGNCHEN Manual VECTOR ANALYZER ZPV 291 4012 92 R 35054 1 ...

Страница 2: ...f c ...

Страница 3: ... Instructions General Basic Settings Changing the Mode of Operation Electronic Locking of Pushbuttons Vector Measurement Voltage Measurement in Channel A Voltage Measurement in Channel B Measurement of the Voltage Ratio of Channel B to Channel A Parameter Measurement Reflection Factor Measurement Impedance Measurement Admittance Measurement Transmission Measurement Group Delay Measurement Single M...

Страница 4: ...al Trigger Operation 19 Data Output 19 Output of Lef thand Readout j 19 Output of the Eighthand Readout 12 20 Output of Lefthand and Righthand Readouts _ and 1j2 20 Output of Measurement Range of Channel A 20 Output of Measurement Range of Channel B 21 Output of Frequency Range of Plug in 21 Output of DC Voltage at ADC Input 21 Output of Device Status Word 21 Output of Status Byte with Serial Poll...

Страница 5: ...AC Supply 36 3 2 6 Control of Analog Section 36 5 2 7 Operating and Indicating Elements 36 3 2 8 Calculator Routines 37 4 Circuit Description 58 4 1 Analog Section 38 4 1 1 Amplitude Measurement 38 4 1 2 Phase Measurement 4 1 4 1 3 Narrowband Sweeping 44 4 1 4 Power Supply 46 4 2 Digital Section 47 4 2 1 Computer Board Y21 48 4 2 2 Memory Board Y32 50 4 2 3 Front Panel Y1 50 4 2 4 D A Converter Y3...

Страница 6: ...ent and the Address and Data Busses 64 5 2 1 Preparation 4 5 3 2 1 3 Checking the Total ROM Content 65 5 3 2 1 4 Trouble shooting in the ROM Range 65 5 3 2 Checking the Entire Digital Section 65 5 3 2 2 1 Purpose 65 5 3 2 2 Preparation 5 5 3 2 2 Trouble shooting in the Digital Section 66 Parts Lists Circuit Diagrams Components Plans R 38535 4 2 ...

Страница 7: ...nging facility Status indication of frequency autoranging facility lights up if frequency autoranging is switched off Digital readout for one component of the test result Quasi analog tendency indication for one component of the test result by an IED line Pushbutton for storing the voltage reference value Pushbutton for storing a voltage and phase reference value for vector mea surements and when ...

Страница 8: ...s button for selecting linear display in relation to a reference value also VSWR in conjunction with 32 22 LOG Luminous button for selecting logarithmic display of test results 24 LOG REF Luminous button for selecting logarithmic display in relation to a reference value 25 B Luminous button for selecting voltage measxirement in channel B and measure ment of the phase angle between channel A and ch...

Страница 9: ...inous button for selecting mea surement of s parameters or s transmission factors Luminous button for selecting group delay measurement Luminous button for selecting fre quency deviation adjustment for automatic group delay measurement lights up during the adjustment procedure Luminous button for selecting mea surement of group delay deviation from a reference group delay value Luminous button for...

Страница 10: ...ut of channel A IF output of channel B Recorder output for the magnitude with narrowband sweeping 48 f SWEEP 1 V 4g r X REC 1 V 50 f Y REC l V 51 C0NTR AF 52 a ADC 10 V IEC BUS Recorder output for the phase with narrowband sweeping Recorder output for the magnitude or real component Recorder output for the phase or imaginary component Recorder output for deviation control in the case of automatic ...

Страница 11: ... 235 V The AC supply is connected to 42 using the supplied power cord Die instrument performance is not affected by AC supply fluctuations of 10 o from nominal In the case of greater variations a transformer or a voltage regulator should be connected ahead of the ZPV 2 2 3 Setting up The ambient temperature should not exceed 45 C for this reason direct insolation is to be avoided To permit easy re...

Страница 12: ...med if meaningful Changing the unit does not make sense when switching over from button 25 to 26 28 to 22 22 to 22 The information on the test setup entered with 2 and 31 is applicable for buttons 28 22 22 and 22 The states selected with 3 5 15 17 12 and 20 are not stored and are therefore maintained irrespective of any change of the mode operation 2 3 1 3 Electronic Locking of Pushbuttons In posi...

Страница 13: ...e measured value at which button f X REF STORE 11 is pressed For the basic setting the voltage reference is 1 mV and the phase reference 0 2 3 2 2 _ Voltage Measurement in Channel B By pressing button B 25 the voltage in channel B and the phase angle between channels A and B referred to channel A are measured The phase is measured as absolute phase 2 or 23 pressed or relative to a reference value ...

Страница 14: ...d B referred to channel A are measured Depending on the plug in used and the test setup the button DIR COUPL 3 should be pressed see also manual of the corresponding plug in Depending on the connection of the test item the result is in linear display LIN 21 pressed either the input reflection factor s or the output reflection factor s The magnitude and phase r f 15 pressed or the real and imaginar...

Страница 15: ...channel A and in channel B and the phase angle between channels A and B referred to channel A are measured Depending on tire plug in used and on the test setup button DIR COUPL 21 and button 50 fl 7 5 fl 22 should be pressed Depending on the connection of the test item the result is xn linear display LIN 21 pressed either the input or the output admittance in mS Pressing button r f 1 displays the ...

Страница 16: ... delay can be measured instead of the phase 2 3 4 1 Single Measurement Pressing button X 54 conditions the group delay measurement For performing individual measurements buttons SET f Q 40 SET f Q 0 4 kHz 41 SET f 4 kHz 39 and SET f 4 40 kHz JL are operated Q O The test method is based on two individual phase measurements which are made at two very closely spaced frequencies Ihe phase difference A...

Страница 17: ... kHz 4 kHz or 40 kHz is determined by pressing buttons SET f 0 4 kHz 41 SET f 4 kHz 39 or SET f 40 kHz 37 The Af setting also fixes the 3 Q O corresponding measurement range see 2 3 4 1 After connecting the ZPV to the signal generator the Af voltage should be matched by calibrating the slope of the generator modulation characteristic To this effect the test item is replaced by the supplied calibra...

Страница 18: ...on 4 lights up Another push of button 3 causes the luminous indication 4 to be extinguished and amplitude autoranging is connected again In all other operating modes the amplitude autoranging facility of the amplifier cannot be switched off Button 2 then only affects the recorder outputs KEC l V 2 3 7 2 Disconnecting the Frequency Autoranging Facility If only one frequency range of the tuner is us...

Страница 19: ...ltages are produced in a purely analog way The amplitude and frequency autoranging facilities are disabled When measuring the ratio B A the vol tage in channel A must be between 35 mV and 350 mV This is monitored by the microprocessor and any error is indicated on the di splay 2 3 9 3 REC l V Outputs At the rear BJC socket r X 4 an analog voltage corresponding to ihe digital readout 7 is available...

Страница 20: ... 2 Switchover to Local Remote or Combined Operation Hie front panel switch 2 permits manual operation LOCAL remote control REMOTE and a combined local plus remote mode COMB which is especially useful for producing test routines These three functions cannot be programmed 2 4 3 Setting the Device Address Hie talker and the listener addresses are set together in accordance with table 2 5 using switch...

Страница 21: ...ammed in accordance with table 2 10 Thus programming simply consists of a sequence of ASCII characters corre sponding to the order of buttons pushed Table 2 9 gives an alphabetical list of all control characters accepted 2 4 7 Internal External Trigger Operation ZPV measurements can be triggered both internally and externally Internal triggering is selected by the programming command combination T...

Страница 22: ...of Lefthand and Righthand Readouts 7 and 12 The outnut command combination LR or the secondary talker address c con ditions the output of the two measured components of the lefthand and righthand 12 readouts The output consists of the information furnished in accordance with 2 4 8 1 and 2 4 8 2 separated by a comma See the following format example SP 1234Ef01 SP 1234E 01 CR For the format and phys...

Страница 23: ...of DC Voltage at ADC Input The output command combination AD or the secondary talker address h triggers the A D conversion of the DC voltage applied to ADC input Jj2 and conditions the digital output the data format is in accordance with 2 4 8 1 Example SP 1234E 03CR The unit is V the input voltage range covers 0 to 10 V The measurement is performed only in one range therefore the exponent 03 is f...

Страница 24: ...buttons button B A corresponding to command BA button LIN to LI and button filter on to II c Thus the solution reads PRINT a 26 BALIIl 2 4 9 2 Programming of Frequency Range Problem Plug in ZPV E2 is to be set to the range 50 to 60 MHz Solution a Same as under 2 4 9 1 b The command characters FR for frequency range programming are found in table 2 9 and the frequency range No for plug in ZPV E2 fr...

Страница 25: ...r processing d Thus the following two solutions are possible 1 PRINT 26 LR INPUT fa 26 A 2 INPUT 26 5 A 2 A 9 Trailsfer of Device Status Word Problem Hie ZPV is completely set by hand in the combined mode this device setting is to be transferred to the TEK 4051 stored and output at a later date Solution a As to listener and talker addresses see 2 4 9 1 and 2 4 9 5 b Section 2 4 8 8 explains the tw...

Страница 26: ......

Страница 27: ...gger operation 120 PRINT 0 26 3 XI X2 Initiate test cycle output results 130 PRINT a 26 Tl internal trigger operation l40 END 200 POLL A B 26 210 PRINT A B 220 REM SRQ REMOVE FAULT 230 RETURN Serial poll Printout of device list number A and status byte B e g by altering test level NOTE Relationship between status byte B after a SRQ and the readout on the ZPV cf Table 2 7 ZFV readout A A B B Status...

Страница 28: ...in A0 or with a single command using secondary address 9 INPUT Q 26 9 A0 reference value in the ZPV PRINT a 26 TR PRINT a 26 AS 2 4 9 8 Phase Offset In external trigger operation TE it is possible to enter a phase value into the ZPV prior to the measurement which is subtracted from the measured phase in the measurement The phase offset holds only for one measurement command The phase offset is pro...

Страница 29: ...INPUT a 26 2 P Result on lefthand readout phase value P P measured phase since phase offset holds only for one measurement after POXXXX has been entered R 38535 26 ...

Страница 30: ...cess Con troller PPC in the test assembly permits also the dynamic inductance and the dynamic capacitance C to be determined To this end the ZPV is programmed for a phase offset Lf i e the control loop locks at From the two frequencies at which the phase of the crystal is and the resonant impedance and C are calculated by means of the desktop calculator To select the mode measurement of crystal eq...

Страница 31: ...pected Press the button T REF STORE on the ZFV The righthand display reads out 0 Measurement Connect the crystal into the li network Now the control loop pulls the crystal to the exact resonant frequency The righthand display of the ZFV reads out 0 The resonant frequency of the crystal can be read off on the frequency counter Hie resonant impedance is given by the formula Z r WA 1 25 M where B A i...

Страница 32: ...offset can be entered into the ZPV say for example 45 which causes the control loop to pull the signal genera tor to the frequency at which the phase of the crystal is not 0 but for example 45 With the given resonant impedance Z the controller can calculate the dynamic inductance the capacitance and the Q from the two 45 frequencies in accordance with the following formulae Z 25 ft tan tf 2 IT f f...

Страница 33: ...t the SWEEP output Scale 0 corresponds to 0 V 1 80 corresponds to approx 0 5 V 1 80 corresponds to approx 0 5 V In addition a reference voltage is available at the CONTR AF output This reference voltage is proportional to the reference value stored in the ZPV by means of the button f 1 REF STORE Scale 0 corresponds to 5 V 179 9 corresponds to 0 V 179 9 corresponds to 10 V If the two signals are ta...

Страница 34: ...ut a controller If no computer is available proceed as follows Switch the ZFV off and back on again Select the B Y LIN REF AUTO mode Shortcircuit the SWEEP P input of the control amplifier Connect the CONTR AF input of the control amplifier to the CONTR AF output of the ZFV The voltage at this output is now 5 0 V _ Vary P2 until the voltage at the output of the control amplifier is 0 V Remove the ...

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