HP 8754A Operating Information Manual Download Page 45 | Manualshive

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Summary of Contents for 8754A

Page 1: ...s underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respective...

Page 2: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 3: ...OPERATING INFORMATION 8754A NETWORK ANALVZER 4 MHz 1300 MHz HEWLETT 11 PACKARD Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 4: ...LYZER 4 MHz 1300 MHz Copyright HEWLETT PACKARD COMPANY 1978 1400 FOUNTAIN GROVE PARKWAY SANTA ROSA CALIFORNIA 95404 U S A MANUAL PART NO 08754 90016 Printed May 1979 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 5: ...the Smith Chart Simultaneous Measurements POWER LEVEL MEASUREMENTS 25 S PARAMETER MEASUREMENTS 25 Test Setup Transistor Bias Calibration Measurement Impedance Using the Smith Chart USING THE 8750A STORAGE NORMALIZER 29 Installation Alignment Test Digital Storage Normalization Matching the 8750A to the 8754A USING AN EXTERNAL SOURCE 33 Narrowband Sweep Using Source With FM Capabilities Wideband Swe...

Page 6: ... frequency sweep and measurement calibration performed for all measurements Specific step by step sequences used to measure and interpret response of the test device are found in the Transmission Measurements Reflection Measurements Power Level Measurements and S Parameter Measurements topics Using the Storage Normalizer describes setup and use of the HP 8750A Storage Normalizer A discussion of Us...

Page 7: ...se Detector X Polar Detector y 2 1 MHz Reference Oscillator 3 6 4 3 GHz 1 MHz Modulator o C 3 6 3 0 GHz 1 MHz 8754A Receiver A 8754A Source 5 to 30 MHz Frequency MHz Harmonic Generator Phase Lock Loop Sweep Shaping Frequency Conversion a Tuning I 8 I r Input 8 1 oto 80 dBm Instrument Description Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 8: ...to 3 0 GHz in a see saw configuration The oscillator outputs are mixed and the difference frequency is amplified to provide the 4 to 1300 MHz RF output An internal leveling loop maintains constant RF output power level over the sweep The receiver provides signal processing to convert incident R and test A and B inputs to dc levels for display Signal separation accessories route the signal incident...

Page 9: ...longer cable serves as the transmission return to the B input 4 S Parameter Test Set Transmission and reflection measurements on two port devices wh ich require measurement of both forward and reverse characteristics can be accomplished using the 8748A S Parameter Test Set This test set contains the necessary splitter couplers and switches to measure forward and reverse characteristics without dis...

Page 10: ...n only 60 to 120 mm adapter length at Port 1 or Port 2 reflection only 11608A Transistor Fixture transmission reflection or 120 to 190 mm adapter length at Port 1 or Port 2 reflection only 190 to 250 mm adapter length at Port 1 or Port 2 reflection only 116008 or 116028 Transistor Fixture with 11858A Transistor Fixture Adapter transmission reflection Test device connected between two 11857A 610 mm...

Page 11: ... MHz 50 dBc GENERAL Trigger Modes AUTO repetitive and TRIG single sweep triggered by front panel pushbutton or rear panel PROGRAMMING connector RF Output Connector Type N Female 1 Applies in swept and CW modes 6 Mode18754A RECEIVER INPUT Frequency Range 4 MHz to 1300 MHz Input Channels Three Inputs R A and B Two test inputs A and B with 80 dB dynamic range and a reference input R with 40 dB dynami...

Page 12: ...AY Cont d Reference Position Reference lines for Channell Channel 2 and Polar Center can be indepen dently set to any position on the CRT for calibration Display resolution expands about the Reference Position line Graticule size Rectangular cartesian 100 mm 3 94 in hori zontal by 80 nlm 3 15 in vertical Polar 80 mm 3 15 in in diameter Both graticules internal to CRT Smith Chart Overlays Viewing 0...

Page 13: ...peci ication 0 3i 1II III1 L 20 40 Input Level dBm 0 1 dB 0 2 dB 0 3 dB 8 1300 1000 500 Frequency MHz SOURCE ISpecification I TVPical I I l o 4 Sweep Time Approximately 10 ms to 500 ms in FAST mode Approximately 1 sec to 50 sec in SLOW mode Frequency Response flatness Absolute A B Impedance son Source match typically less than 1 4 SWR 16 dB return loss Power Range Uncalibrated to typically 13 dBm ...

Page 14: ...rmalizer All 8501 A features except CRT labels and graphics are avail able when the 8501 A is used in conjunction with the 8754A Programming Connector Function 25 pin Amphenol connector with nlat ing connector Outputs include nlagnitude phase and sweep outputs and inputs described above as well as measurement mode selection by TTL levels or contact closures Warm Up One half hour is required for te...

Page 15: ...following paragraphs are supplied They provide instructions for the following operations which are common to all measurements For example when the 8754A is used with the 8502A or 8748A test sets the R input is the incident signal the A input is the reflected signal and the B input is the transmitted signal Select Measurement Polar A R displays the complex coefficient consisting of the magnitude ra...

Page 16: ...race The reference position line for each measurement channel can be independently set to any vertical location using the CH 1 or CH2 verniers and can bevChanged at any time without affecting display calibration This allows you to set the reference position line to the most convenient location for viewing the trace usually the center CRT graticule SCALE DIVISION 10 2 5 40 10 4 30 7 5 3 20 5 2 10 2...

Page 17: ...marker accuracy at the frequency of interest using any trace on the rectangular display and the CAL vernier adjacent to the readout If the trace is difficult to read use the REFERENCE POSITION line of the unused measurement channel to display the markers Calibrate the readout as follows Select CENTER sweep mode 200 MHz sweep width and 50 MHz markers Use the TUNING control to center a marker Jl_ ne...

Page 18: ...level at 75 dBm but improves to 0 3 dB above 50 dBm Measurement uncertainty caused by crosstalk between inputs can become important when the signal levels differ significantly For example with the R input at 0 dBm and the B input at 75 dBm the mea surement uncertainty contributed by crosstalk is about 1 dB This uncertainty can be reduced to about 0 1 dB by reducing the R input level to 30 dBm The ...

Page 19: ...ng the OFFSET vernier to move the trace to the reference position line When the OFFSET button is depressed the offset determined by the vernier is applied to the measurement when the button is released the offset is not applied to the measurement Front Panel Introduction Measurement Calibration When measuring A B or R absolute power in dBm simply release the OFFSET button to disengage the vernier ...

Page 20: ...luster for a polar display If the phase angle becomes more negative with increasing frequency then the test signal path is longer than the reference signal path Therefore length must be added to the R input signal path if the range of the front panel LENGTH controls is insufficient If the phase angle becomes more positive with increased frequency then length must be added to the A or B input signa...

Page 21: ... measurement channel to display the markers as shown below CENTER Connect device to be measured Set REFERENCE switch to move point on trace as close to reference position as possible MEASURED VALUE Value displayed on REFERENCE switch trace displacement from reference position To familiarize yourself with operation of the reference controls note that when the sign is displayed increasing the refere...

Page 22: ...hat will be used for the measurement If it is necessary to change adapters between calibration and measurement such as testing a device having the same sex connectors at both ports best accuracy is achieved by switching between adapters having equal loss and electrical length 8748A I Test h Device lAJ I I Connect I L Together __ J To Calibrate O Programming 8754A 0 0 0 II In_te_rc_o_nn _ _ o 00 a ...

Page 23: ... to reference position line Magnitude ratio REFERENCE switch setting trace displacement from reference position line B R Set REFERENCE switch to 00 Adjust OFFSET vernier to move trace to reference position line OFFSET switch in This technique can be used to read relative values between any two points on the trace For example the frequency at the 3 dB points of a filter response can be measured as ...

Page 24: ...vertical line is the phase detector transition between these values Thus the measurement trace between any two of these transitions represents 3600 of phase shift To illustrate the display format calculate the total phase shift introduced by the test device over the sweep as follows Measure the phase angle at the left end of the trace and determine the number of degrees before the first transi tio...

Page 25: ...ude and phase simultaneously use Channell for magnitude and Channel 2 for phase If you decide to use Channel 2 for both magnitude and phase measurements switching between B R and PHASE B R calibrate magnitude first as described above then do not change Channel 2 OFFSET during phase calibration Transmission Measurements Simultaneous Measurements Model 8754A Artisan Technology Group Quality Instrume...

Page 26: ... is usually achieved when the test device is connected directly to the test set RF port because unwanted reflections from adapters cables etc are eliminated However for the 8748A this configuration can only be calibrated for reflection magnitude and phase and transmission magnitude use the two cable configuration if transmission phase is required If an adapter is required to connect the test devic...

Page 27: ... to 00 Adjust OFFSET vernier to move trace to reference position line OFFSET switch in MEASUREMENT CALIBRATION For example if the measured magnitude ratio is 30 dB Return Loss 30 dB P 0 032 and the SWR is 1 07 After calibration a negative value indicates that the magnitude of the reflected signal is less than the in cident signal This figure shows return loss of a bandpass filter at 10 dB division...

Page 28: ...R CENTER frequency sweep and signal levels Press POLAR AIR CHANNEL 1 Magnitude Set REFERENCE switch to 00 Adjust OFFSET vernier to move trace to outer circle OFFSET switch in CHANNEL 2 Phase angle Set REFERENCE switch to 00 Adjust POLAR AIR LENGTH and OFFSET for smallest cluster at 180 0 MEASUREMENT Connect test device Read p L from polar graticule or Set CHANNEL 1 REFERENCE switch to move point o...

Page 29: ...fficient display by installing a Smith Chart overlay To install the overlay grasp the top and bottom of the plastic bezel squeeze to release the catch then pullout Slide the overlay down through the top slot then reinstall the bezel Four versions of the Smith Chart overlay are supplied with the 8754A 2 0 1 0 0 2 and 0 1 full scale reflection coefficient value at the outer circle To read impedance ...

Page 30: ...the test device Using the 8748A S Parameter Test Set with the 8754A allows measurement of both forward and reverse S Parameters without disconnecting the test device The reflection S parameters S1 1 input reflection coefficient and S2 2 output reflection coefficient are measured using a sequence similar to that described for Reflection Coefficient Page 23 Transmission S Parameters S12 forward tran...

Page 31: ...or use with bias tees optimized for RF applications The HP Model 87l7B Transistor Bias Supply is not compatible with the 8748A it is designed for bias tees optimized for microwave frequencies and may cause the test device to oscillate These diagrams show biasing connections for NPN common emitter and common base configurations Reverse power supply polarities for PNP devices For the common base cho...

Page 32: ...n forward and reverse will occur if the connections from ports 1 and 2 to the test device are not the same length S11 Input Reflection Connect short circuit to Port 1 measurement plane Set Test Set S11 S21 Perform Reflection Coefficient Calibration POLAR AIR see Page 23 but do not ad just CHANNEL 2 OFFSET vernier S22 Output Reflection Connect short circuit to Port 2 measurement plane Set Test Set ...

Page 33: ...installing the Smith Chart overlay See Page 24 Select Sll S21 press POLAR AIR and use the Reflection Coefficient Measurement sequence Page 23 to measure SII Press to release POLAR AIR and alternate between CHANNEL 2 B R and PHASE B R to obtain magnitude and phase values for S21 The transmission coefficient linear magnitude value 7 is calculated from the dB magnitude ratio using the same equation u...

Page 34: ...LYZER with both switches on the board set to EXT or 8754A NETWORI ANALYZER Board in the 8750A rear panel inter fase board slot 8750A A5 INTERFACE BOARD NORMALIZER INTERCONNECT OJr r l 0 c l 0 0 o0000 8754A Alignment Test With any trace on the display press CHI INPUT CH2 INPUT then alternate between INPUT and BYPASS The trace and any markers should match within 1 2 minor division Now press CHI STOR...

Page 35: ...t line Thus normalization replaces conventional methods such as using a grease pencil on the face of the CRT as the preferred method of measuring and adjusting devices to match a standard response When STORE INPUT is pressed the current displayed trace except for frequency markers is transferred to reference memory Pressing INPUT MEM displays the difference between the reference trace and the curr...

Page 36: ...TRUM ANALYZER and one labeled NET WORK ANALYZER In addition an optional interface board labeled 8754A NETWORK ANALYZER is available Set the two switches on the component side of the board to EXT as shown install it and use the following adjustment sequence Both the standard and 8754A Network Analyzer Interface boards use the identical alignment procedure The optional board uses some different comp...

Page 37: ...S 1Hz to 50 MHz Set SWEEP WIDTH MHz vernier and TUNING to adjust marker position to 8750A Press CH I then INPUT Adjust HORIZ POSN and HORIZ GAIN for full width trace Press STORE INPUT then INPUT MEM Adjust VERT POSN to move trace to center graticule Press BYPASS Storage Normalizer f h 8754A Connect test device release CHI and CH2 REFERENCE POSITION buttons and position trace for measurement i 8750...

Page 38: ...gree with the Source s START or lower frequency Also the SWEEP WIDTH MHz control should be adjusted to agree with the Source s sweep width or set to EXT RF for sweeps less than one and one half octaves There are two types of external sources which can be used with the 8754A First there are stabilized signal generators with FM capabilities such as the HP 8660 or HP 8640 which achieve a swept displa...

Page 39: ...eep vernier fully counterclockwise use the 8640 PEAK DEVIATION control to set the start frequency as read on a counter Then select 8754A AUTO and FAST or SLOW sweep For sweeps greater than one and one half octaves a sweeper such as the HP 8620C may be used Calibrate and make measurements as discussed previously Using an External Source Narrowband Sweep Using Source With FM Capabilities Make a meas...

Page 40: ...r the 8662A the horizontal axis of the 8754A is driven by connecting the 8662A SWEEP OUTPUT which is a 0 to lOV ramp to the 8754A EXT SWEEP IN connector Proper retrace blanking is achieved by connecting the 8662A Z axis blanking output to the 8754A PROGRAMMING connector J7 pin 3 serial prefix 1908A and higher To use this system Set 8754A rear panel switch to EXT SWEEP Set 8662A controls for desire...

Page 41: ... Display Both rectangular for magnitude and phase and polar for reflection coefficient graticules Smith chart overlays with normalized full scale impedance values of 2 1 0 2 and 0 1 are supplied REFERENCE POSITION Controls to display and position the independent Channell and Channel 2 rectangular reference position lines Press CH 1 or CH 2 to display the reference position line then use to set pos...

Page 42: ...ier is set to fully CW detent Uncalibrated vernier settings allow intermediate sweep width selections SWEEP Selects sweep trigger and sweep time With the rear panel sweep switch set to INT the AUTO button selects the internal sweep generator with sweep times between 0 01 and 0 5 seconds for FAST or 1 to 50 seconds for SLOW The vernier controls sweep time within these ranges With MAN selected the v...

Page 43: ...surement POLAR AIR uses CHANNEL 1 for polar magnitude and CHANNEL 2 for polar phase angle R A and B select power in dBm at the R A or B input OFFSET not engaged NOTE To select R press Channell and 2 OFF A R and B R select magnitude ratio in dB between the A or Band R input PHASE B R displays the phase relationship in degrees between Band R inputs Pressing POLAR A R overrides any other measurement ...

Page 44: ... 4V 180 1 8V 0 dB OV 0 OV 80 dB 8V 180 1 8V 825n Sweep Output 5V Present in all sweep modes INT and EXT 50Kn External Sweep In lV Display Division Sweeps CRT display and RFsource lKn Vertical Deflection Center Graticule OV O 4V range 0 04V Marker 50n CW RF INPUT Generates Marker at input frequency OV During Sweep 5V Blank when 8754A display blank 5V Polar Intensity Markers For mag ratio REFERENCE ...

Page 45: ...odel 8754A Interfece Connector HP PIN 1251 0063 ELECTRICAL LENGTH ADJUSTMENT PHASE green control POLAR blue control B A TEST INPUT Function 1 5V open a OV ground J7 INPUTS TTL Levels or Contact Closure J7 PROGRAMMING PIN FUNCTIONS 14 fo 0000000000 25 1 0000000000 0 13 A A R POLAR A R B B R PHASE B R 1 Normal Operation o Reverse A and B nomenclature on front panel Remains active in remote operation...

Page 46: ...ver narrow sweep widths or when EXT RF is selected Stop Sweep 1 Continue Sweep o Stop Sweep Allows external control of sweep Sweep Trigger negative going edge trigger When this pin is grounded a sweep will be triggered if the front panel SWEEP TRIG is depressed and the retrace cycle is completed Tuning Marker Output and Input When ground is applied the trace moves up 1 4 major division on rectangu...

Page 47: ...pins 11 and 22 and MAG PHASE output Enabled by J7 pin 21 8754A Remote Select See also J7 pin 19 If not enabled outputs are selected by front panel controls J7 OUTPUTS Two identical Magnitude or Phase Outputs They are the same as rear panel MAGI PHASE output Magnitude 0 1 V dB Phase 0 01 V degree Output is determined by J7 pins 20 and 19 as follows Magnitude Phase Selected by J7 pin 19 A R or B R S...

Page 48: ...ar panel SWEEP OUTPUT see rear panel input output summary on page 39 4 oto 10V Sweep Output Same as J7 pin 17 except levels changed J7 ACCESSORY 14 20 Vdc Used for 8748A test set Not recommended for other external uses Test Test Set 50 MA max 12 and 18 Ground 43 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 49: ...T CENTER Frequency 3 Adjust SWEEP WIDTH vernier to CAL detent 4 Select desired SWEEP WIDTH MHz Set Frequency Range Rectangular 1 Depress REFERENCE POSITION button each channel 2 Use position as desired center 3 Release REFERENCE POSITION button POLAR Calibrate Using Markers 1 Select 50 MHz markers Center marker on START or CENTER graticule with TUNING 2 Adjust FREQUENCY CAL vernier for correct LED...

Page 50: ...ce position line POLAR A R Connect standard see below Move dot to reference position 1 Set CH 1 and CH 2 REFERENCE levers to 00 2 Depress CH 1 OFFSET button to engage vernier 3 Adjust CH 1 OFFSET vernier until trace is at outside circle 4 Adjust POLAR LENGTH control for smallest dot If range is insufficient select cable lengths R or B cables or 8748 ref ext cable 5 If necessary engage CH 2 OFFSET ...

Page 51: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 52: ...HP Part No 08754 90016 HEWLETT PACKARD PRINTED IN U S A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 53: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

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