HP 8568B manuals
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122 pages 0 b
313 pages 5.64 Mb
1 HP 8568B Spectrum AnalyzerHP 8568BHEWLETT PACKARD HP Part No Printed in USA September 3 CertificationWarranty 4 Assistance5 Safety SymbolsGeneral Safety Considerations 6 HP 8568BSpectrum Analyzer Documentation OutlineHP 8568B Installation and Verification Manual HP 8568B Operating and Programming HP 8568B Performance Tests and Adjustments Manual HP 85680B RF Section Troubleshooting and Repair Manual HP 85662A IF-Display Section 7 Contents10 Figures14 lhbles15 General Information23 Performance Tksts24 Equipment RequiredTest Record Note 25 1.Center Frequency Readout Accuracy ‘I&t28 2.Frequency Span Accuracy lkst29 2. Frequency Span Accuracy Test83640A HP10503A Procedure 1. Connect equipment as shown in Figure 2.Press QNsTR PRESET]on analyzer 3.Press [CENTER FREQUENCY]100 MHz, [FREQUENCY SPAN_) 200 Hz 4.Connect synthesized sweeper tot spectrum analyzer RF input 5.On synthesized sweeper, select external REFERENCE and key in (jj’0 dBm 6.Press Icw] and key in 99.999 910 MHz Press MARKER 8.Set synthesized sweeper frequency to 100.000 090 MHz 9.Press MARKER [PEAK SEARCH] and record marker reading under FREQ D of Table 13.Compare the table 2-4spec to the span error value calculated in step lhble 2-3.Wide Span Error 31 3.Sweep Time Accuracy Test (220 ms)Related Adjustment 32 EquipmentSweep Times 220 ms 1. Connect equipment as shown in Figure 2.Press [INSTR PRESET)on the spectrum analyzer 3.Key in the following settings: 0 kHz 4.Set up the universal counter as follows: a. Set all front panel keys in “out” position. b. Set POWER switch to ON e. Depress T.I. A + B switch (making sure the blue shift key is out) j. Adjust Channel A trigger level to set a DVM voltage reading of 0.3 k. Repeat steps i and j for Channel B Set analyzer 34 Sweep Times 220 ms (Alternate Procedure)Start-UpTime Measurement Sweep Time 35 4.Resolution Bandwidth Accuracy Test36 300 kHz330.0 kHz 200 kHz 33.00 kHz 20 kHz 3.300 kHz 300 Hz 500 Hz 360 Hz 36 Hz 40 6.Resolution Bandwidth Switching Uncertainty Test44 8.Frequency Response Test45 8. Frequency Response TestAdditional Equipment for Option 001: 20 MHz to 1.5 GHz 2.Set controls as follows: Power Meter MODE RANGE HOLD OFF CAL FACTOR % START FREQ . 20 MHz STOP FREQ SWEEP . . . 120 s POWER LEVEL 0.00 dBm Connect equipment as shown in Figure 4.Depress RANGE HOLD button on power meter 5.Select METER leveling on synthesized sweeper 6.Key in the following spectrum analyzer settings: km) .3 MHz 46 9 . Key in the following spectrum analyzer settings:km) 1.5GHz 10.Press TRACE A [MAX) on the analyzer 11.Press SWEEP SINGLE on the synthesized sweeper Figure 2-12.Frequency Response Measurement (20 MHz to 1.5 GHz) Press DISPLAY LINE [ENTE (20 MHz to 1.5 GHz) MaximumdBm MinimumdBm 2 - 24 Performance Tests 47 Option 001: Set [REFERENCE LEVEL] TO -6.0dBmRepeat steps 6 through 11. Press DISPLAY LINE ENTER) (-1 (ENTE (20 MHz to 500 GHz) 100 kHz to 20 MHz 17. Set the frequency synthesizer controls as follows: (Option 001: + 4 dBm) + 4 dBm) Option 001: Use HP 11852 Minimum Loss Pad and adapters Figure 2-13.Frequency Response Test Setup (100 kHz to 20 MHz) 20.Key in the following spectrum analyzer settings: 49 k=)50 100Hzto 100 kHz51 (1 kHz to 100 kHz)43.Set Display Line to peak of trace at 1 kHz 44.Key in the following spectrum analyzer settings: TRACE A .l kHz 1 kHz iO0 Hz 45. Set function generator controls as follows: 47.Key in the following spectrum analyzer settings: 48.Set (CF STEP SIZE] to 100 Hz. Step spectrum analyzer 1000 Hz 900 Hz 800 Hz 700 Hz 600 Hz 400 Hz 54 9. RF Gain Uncertainty TestFigure 2-16.RF Gain Uncertainty Measurement 55 10.IF Gain Uncertainty Test56 Procedure 1. Press ( INSTR pfwm-)Press 2.Connect CAL OUTPUT to SIGNAL INPUT 3.Press Cm]8. Adjust AMPTD CAL for a MARKER amplitude of -10.00dBm 50.02 dB 10 dB Gain Steps 6.Connect the equipment as shown in Figure 7.Key in analyzer settings as follows: 9 Set analyzer as follows: [V’DEO (j-1 LOG 1 dB 10.Press MARKER [PEAK SEARCH) 11.Press (SHIFT),(m]I to permit extended reference level settings Set the analyzer 58 2 dB Gain Steps59 dB Gain Steps63 12. AmplitudeFidelity Test64 12. Amplitude Fidelity TestProcedure Log Fidelity 2.Connect equipment as shown in Figure 3.Press ~NSTR PRESET) on the analyzer. Key in analyzer settings as follows: MHZ kHz center the signal on the display 5. Key in the following analyzer settings: &Xi 2-16.Log Amplitude Fidelity Frequency Fidelity Error Calibrated MARKER A (Column 2-Column 1) Error (dB) 0 to 80 dB 0 to 90 dB (mm) Step (dW <*l.O dB ~f1.5 dB 2 - 42 Performance Tests 65 The fidelity error for amplitude steps from9.The fidelity error at the -90dB setting should be s&l.5 dB Figure 2-22.Amplitude Fidelity Measurement Linear Fidelity 10. Key in analyzer settings as follows: (jEGi 300 Hz 11.Set the frequency synthesizer for an output power level of + 10 dBm 12.Press SCALE LIN pushbutton. Press MARKER CPEAK SEARCHJ[MKR)to center the signal on the display VlDEo] @‘iYiF),[XF6 67 13.Average Noise Level Tkst72 10 DB115 Adjustments134 rapaors135 Standard Value Replacement 0.125 ResistorsResistors Value (n) EP Fart Number Value (fl) 136 ‘Ihble(continued) Resistors1 Value (0) BP Part Number co Value (!I) ElP Fart Number 137 Table 3-6.Standard Value Replacement 0.5 ResistorsBP Part Number Value (0) EIP Fart Number 138 IhbleStandard Value Replacement 0.5 Resistors Value (0) EIP Fart Number CD Value (a) EIP Fart Number 139 1.Low-VoltagePower Supply Adjustments141 RF SectionFigure 3-4.Location of RF Section Low-VoltageAdjustments 143 2.High-VoltageAdjustment (SN 3001A and Below)151 CRT153 2.High-VoltageAdjustment (SN 3004A and Above)166 3.Preliminary Display Adjustments (SN 3004A and Above)173 4.Final Display Adjustments (SN 3001A and Below)175 4.Final Display Adjustments (SN 3004A and Above)179 5.Log Amplifier Adjustments198 9.3 dB Bandwidth Adjustments201 10.Step Gain and 18.4 MHz Local Oscillator Adjustments206 Converter Adjustments11. Down/Up Converter Adjustments 207 Optional209 12.Time Base Adjustment (SN 2840A and Below, also 3217AO5568 and Above)211 6. Set the Frequency Counter controls as follows:On the Frequency Counter, select a 10 second gate time by pressing GATE] 8.Offset the displayed frequency by -10.0MHz by pressing MATH Wait at least two gate periods for the Frequency Counter to settle, and record Reading 1: mHz Allow Reading 2: Reading 3: Reading 4: Reading 5: Reading 6: Reading 7: Reading 8: Reading 9: Reading 10: Position the spectrum analyzer on its right side as shown in Figure 212 Figure 3-53.Location of A27Al Adjustment12. Time Base Adjustment (SN 2848A to 3217A05567) 213 12.Time Base Adjustment (SN 2848A to 3217A05567)217 Reference Adjustments221 14.249 MHz Phase Lock Oscillator Adjustments222 Location of 249 MHz Phase Lock Oscillator Adjustments223 14.249 MHz Phase Lock Oscillator AdjustmentsSet LINE switch to STANDBY. Adjust A7L2 Set LINE switch to ON and key in @KKK 18.Set LINE switch to STANDBY and place A7 249 MHz PLO on extender 19.Set LINE switch to ON, press ~NSTR PRESET), and set the analyzer as follows: 16.5 MHz L-1 @?G?iG] 22.On the HP 8566A/B Spectrum Analyzer, key in [SIGNAL TRACK) 10 kHz 300 Hz -50dBm, and CATTEN]0 dB On the HP 8566A/B Spectrum Analyzer, turn and set to 500 kHz on the HP 8566A/B Spectrum Analyzer. Press then a key Set LINE switch to ON and press C 28.Disconnect tee and reconnect cable 89 (gray/white) to A7J 226 16.Second IF Amplifier and Third Converter Adjustment230 17.Pilot Second IF Amplif’ier Adjustments244 Voltage-TunedOscillator Adjustments245 DACS Accuracy CheckPositive Supply 246 VT0Center-Frequency Checks 247 21.Slope Compensation Adjustments250 22.Comb Generator Adjustments254 Standard Procedurea. Key in [BLANK)TRACE A and SWEEP [S’NGLE] b. Disconnect cable 0 (black) from sweep ramp input A3A8Jl c. Short A3A8TP4 to A3A8TP5 or connect SMB snap-onshort to A3A8J e. Set the oscilloscope settings as follows: Location of Analog-To-DigitalConverter Adjustments i.Press MARKER c-1,1498 (MHz), and CSHIFT) (SINGLE)“ j.Connect DVM to A3A8TP5 and ground to A3A8TP4. Set DVM for V de 255 Alternate Procedure256 24.Track and Hold Adjustments259 25.Digital Storage Display Adjustments25. Digital Storage Display Adjustments A3A 1 Trigger A3A2 Intensity Control A3A3 Line Generator Figure 3-89.Digital Storage Display Adjustments Setup Place instrument upright as shown in Figure 2.Set LINE switch to ON and press [INSTR PRESET] Preliminary Graticule Adjustments 3.Press TRACE A Cm] 260 2 5 . Digital Storage Display AdjustmentsFigure 3-90.Location of Digital Storage Display Adjustments 261 Sample and Hold Balance Adjustments25.Digital Storage Display Adjustments Figure 3-91.Sample and Hold Balance Adjustment Waveforms Figure 3-92.Waveform Before Adjustment 263 Final Graticule AdjustmentsX and Y Expand Adjustments 264 Low-NoiseDC SUPPlYFigure 3-93. Low-NoiseDC Supply ‘Ihble 3-7.Parts for Low-NoiseDC Supply Reference/Designation HP Fart Number 265 Crystal FilterBypass Network ConfigurationCrystal Filter Bypass Network Configuration Figure 3-94.Crystal Filter Bypass Network Configurations lhble Crystal Filter Bypass Network Configuration for A4A4 and A4A8 (21.4 MHz) Part Value Qty. CD HP Part Number A4A7 (3 MHz) 1 Fart HP Part Number 266 6 dB Bandwidths:Impulse Bandwidths: 267 4.6 dB Resolution Bandwidth Accuracy Test269 Related Adjustment Impulse Bandwidth AdjustmentsSpecification *20%, 3 MHz bandwidth flO%, 1 MHz to 1 kHz bandwidths -0,+50%, 300 Hz to 10 Hz (6 dB bandwidths) iZZiZK 2. Set the pulse/function generator controls as follows: 271 INGLEI@Z’ l,S’NGL Es) 30 kHz (i) @GiF Record MARKER amplitude in Table @FZF FGFBWI) @iZGXQ FRI AUTO (SINGL 29. Set the frequency synthesizer CFREQUENCV~ tn 1 kHz. On the spectrum analyzer key in: (FREQUENCY SIm 0 Hz, [SWEEP TIME] RINGLE) Set the frequency synthesizer On the spectrum analyzer key in: @ ?X?i) 3 kHz (i) CVloEo] 30 kHz 12 kHz 275 Specification 60 dB/6 dB bandwidth ratio:~11: 1, 3 MHz to 100 kHz bandwidths ~8: 1, 30 kHz to 30 Hz bandwidths 60 dB points on 10 Hz bandwidth are separated by ~100 Hz Equipment None required 1. Press 2. Connect CAL OUTPUT to SIGNAL INPUT 3. Key in analyzer control settings as follows: SWEEP @iiYZ C-1 Read 277 VlDEoj281 Procedure 1. Press ~NSTR PRESET)283 ‘RES)289 Related Performance296 Specification Log:297 2.Press (JNSTR PRESET]on the analyzer. Key in analyzer settings as follows:+ 10 dBm 4.Connect equipment as shown in Figure 5-l 7.Press MARKER [PEAK SEARCH), MARKER In] 8.Step the frequency synthesizer output amplitude down 10 dB 9.On the spectrum analyzer, press SWEEP [mland wait until Subtract the value in column 1 from 298 + 10(ref) sf1.5 dB 14.Set the frequency synthesizer for output amplitude to + 10 dBm 15.Key in the following analyzer settings: &TTiFV @?GF) 17.Key in the following analyzer settings: k-1t Subtract the value in column 1 from the value in column 2 for 299 sk1.0 dB<%1.5 dB 22. Key in analyzer settings as follows: 23.Set the frequency synthesizer for an output power level of + 10 dBm 24.Press SCALE LIN pushbutton. Press MARKER [PEAK SEARCH_),(MKR) to center the signal on the display DEOBW) t 26.Decrease frequency synthesizer output amplitude by 10 dB steps . noting the MARKER A amplitude and recording it in column 2 of ‘Iable 304 . . . . . . 6-4. . 6-4, 6-5 6-4, 6-5 6-6 . . . . . . 6-6
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