HP 11667B User's Manual
Contents
1. SPLITTER i L eK Ce ee zd HP 116648 DETECTOR Insertion Loss or Gain This sequence lists the steps for a typical insertion loss or gain measurement Calibration Measurement MEAS PWR B or MEAS RATIO B R Connect test device DISPLAY MEAS CURSOR Connect B Input detector to splitter Position Cursor Set Start Stop Frequencies Read magnitude and frequency Set Power Level E DISPLAY MEM DISPLAY M MEAS Calibration sets a zero dB reference with the detector connected After connecting the test device a negative measured value indicates insertion loss a positive value indicates gain Figure 3 Typical Measurement Procedure Performance Tests 34 PERFORMANCE TESTS 35 Performance testing the HP 11667B consists only of testing the tracking between the output arms refer to Paragraph 41 36 Phase information is required to measure the SWR of the HP 11667B The only instrument that is practical for making this measurement to 26 55 GHz is the HP 8510 network analyzer For further information refer to the HP 8510 Oper ating Manual 37 SWR is usually performance tested using a scalar network analyzer such as the HP 8756A To measure the SWR of the HP 11667B with an HP 8756A an HP 85021B bridge would be required Both the bridge and the HP 11667B have female precision 3 5mm connectors Therefore a pre cision 3 5mm male to male adapter would be required to connect the power2. high connector mismatch can be tolerated Because SM connectors are not precision mechanical devices and are especially susceptible to me chanical wear causing them to de grade so that they are out of specification they are potentially damaging to any precision 3 5mm connectors with which they are mated A worn or out of spec SMA con nector can permanently damage its mate ON THE VERY FIRST CONNECTION Therefore BE FORE making any connections ensure that you have inspected both connectors visually and that you have checked the mating plane dimensions with an ap propriate connector gauge BOTH connectors must be within spec ifications or permanent damage may result Pay special attention to the SMA male pin A male pin that is too long may smash or break the delicate fingers on the precision 3 5mm female connector Care fully align the two connectors With the male contact precisely concentric with the female push them straight together Do not overtighten or rotate either center connector Turn only the outer nut of the male connector and use a torque wrench 8 in lb 90 N cm for the final connection Refer to Table 3 for a list of precision 3 5mm adaptors avail able from Hewlett Packard b The diameters of both the center and the outer conductors differ between SMA and precision 3 5mm connectors When an SMA 22 A precision 3 5mm m to precision 3 5mm m adapter HP Part No 1250 1864
3. Changes supplement documenting the differences will be provided with the manual 11 In addition to change information the supplement may contain information for cor recting errors in the manual To keep this manual as current as possible Hewlett Packard rec ommends that you periodically request the latest Manual Changes supplement The supplement for this manual 1s keyed to its print date and part number both of which appear on the title page Changes may be keyed to specific serial numbers in which case the relevant serial numbers will be noted on the first page of the supplement Complimentary copies of the supplement are available from your local Hewlett Packard office listed at the back of this manual General Information HP 11667B 2 Table 1 Specifications d Frequency Range DC to 26 5 GHz Maximum Input Power 27 dBm 0 5W Frequency GHz Description DC to 18 DE to 26 5 Equivalent Output SWR lt 1 22 122 Leveling or ratio measurement zu zen Output Tracking between output arms Wen up VER Connectors Precision 3 5mm Female on all ports Dimensions 47 mm wide x 40 mm high x 10 mm deep 1 85 in x 1 57 in x 0 39 in b Shipping Weight 0 14 kg 4 94 oz Table2 Supplemental Characteristics Frequency GHz Description DC to 18 Phase Tracking Se pur between output arms typically Typical insertion loss 12 15 Frequency GHz Leveling or ratio measurement source matc
4. ES E Qs O O Ns STOP SWEEP ead HP 115678 POWER SPLITTER 0 3030 1250 1864 ADAPTER HP 11687B POWER SPLITTER _ 116648 DETECTOR 115548 Figure 4 Output Tracking Test Setup NOTE HP 8350B is used in this performance test A modified HP 8350A has the same capabilities as an HP 83508 but unmodified HP 8350A DOES If an unmodified HP 8350A is being used DO NOT connect the 8756 SYSTEM INTERFACE or the Stop Sweep Because the 8756 SYSTEM INTERFACE cannot be used pressing PRESET on the HP 87564 will NOT cause the HP 8350A to preset The operator must press PRESET on BOTH the HP 8756A AND the HP 83504 In addition operator must press L MOD on the HP 8350A to turn square wave modulation on and must set the sweep time e to gt 200 ms Performance Tests HP 11667B _ EQUIPMENT Power Splitter one plus Test Devise RTT i wee db HP 11667B Sweep Oscillator s oos aot ae 8350B RE Plus In o eei be ey EN tie Tat OUR N wre HP 83595A Network AnalVZet osse ee c rp aa SION Detector 2 required arten et PR 11664 50 Ohm Load precisi n 9090 Adapter precision 3 5mm mj to precision 3 5 mm m HP 1250 1864 PROCEDURE 1 Connect equipment as show in Figure 4 Press PRESET on the HP 8756A to preset both the HP 8756A and the HP 8350B this will also turn the HP 83508 MOD on and set the
5. OPERATING AND SERVICE MANUAL HEWLETT PACKARD HP 11667B 1 GENERAL INFORMATION 2 Introduction 3 This manual contains operating and service information for the Hewlett Packard Model 11667B power splitter shown in Figure 2 It explains the nature of the operators check for this device and describes the one performance test required testing the tracking between the output arms 4 On the title page of this manual is micro fiche part number that can be used to order 10 x 15 em 4 x 6 in microfilm transparencies of this manual The microfiche package includes the latest Manual Changes Supplement and per tinent service notes 5 Specifications 6 Performance specifications are listed in Table 1 These are performance standards or limits against which the instrument may be tested Table 2 provides supplemental char acteristics These are not specifications but are typical characteristics included as additional information for the user General Information 7 Safety Considerations 8 Do not apply more than 27 dBm RF CW power to the HP 11667B or damage to the power splitter may occur 9 instruments Covered By Manual 10 Thecontents ofthis manual apply directly to all instruments unless a yellow Manual Changes supplement is included with the manual An instrument manufactured after the printing of this manual may have features that do not appear in this manual In that case a Manual
6. h 12 15 Frequency GHz HP 11667B 12 Description 13 The HP 11667B is a two resistor power splitter used in network measurement systems where one output arm is used for leveling or to supply a reference signal for ratio measurements 14 When the 11667B is used in a network analyzer system the node atthe fork ofthe power splitter is held constant by the leveling action of the network analyzer reference channel see Figure 1 Because a virtual ground is present at the node the resistance in each output arm is 50 ohms giving a 50 ohm matched output impedance 15 When the source power level is varied e g when measuring gain compression ratioing is required to maintain calibration This is not necessary when using the HP 11667B because the ratio between the signals in the two arms is unaffected Variations in power level appear in both arms equally and simultaneously General Information Reference Arm Virtual Ground Figure 1 HP 11667B Schematic E Ei B fk 4 E d d Installation 16 INSTALLATION 17 initial Inspection 18 If the shipping container or cushioning material is damaged it should be kept until the contents of the shipment have been checked both mechanically and electrically Procedures for checking electrical performance are given in this manual under PERFORMANCE TESTS If the instrument does not pass these electrical tests or shipping co
7. ntents are incomplete or there is mechanical damage or defect notify your nearest Hewlett Packard office If the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as Hewlett Packard Keep the shipping materials for the carrier s inspection Hewlett Packard will arrange for repair or replacement without waiting for claim settlement 19 Preparation For Use 20 Figure 3 shows a typical measurement configuration using the HP 11667B 21 Mating Connectors The mating con nector for a precision 3 5mm female connector is a precision 3 5mm male connector CAUTION An SMA connector will mate with a precision 3 5mm connector but it should ONLY be done with the fol lowing considerations 1 Important structural dimensional differences exist between these two types of connectors a Precision 3 5mm connectors are air dielectric devices Only air exists between the center and outer conductors The male or female center conductor is supported solely by a plastic bead deep within the connector body SMA connectors employ a plastic di electric to support the entire length of the center conductor HP 11667B connector is mated with a preci sion 3 5mm connector the connec tion will exhibit a discontinuity mismatch SWR of typically 1 10 return loss 26 5 dB at20 GHz The mating of SMA and precision 3 5 connectors should be done only when such a
8. on 3 5mm m 1250 1864 Precision 3 5mm f to Precision 3 5m f 1250 1865 Precision 3 5mm m to Precision 3 5mm f 1250 1866
9. or a precision airline can be used to extend the life ot the 11667B precision 3 5mm connectors HP 11667B 23 Operating Environment The operating environment should be within the following limits 0 to 55 C Temperature 2 olere 2 1 Humidity c cece hates Up to 95 relative Al tude oce To Up to 4 572 metres 15 000 feet 24 Storage and Shipment 25 Environment The instrument may be stored or shipped in environments within the following limits Temperature o 40 to 75 40 to 167 F Humidiy vu a Up to 95 Altitude ie rex Up to 7 620 metres 25 000 feet 26 Protection should be provided from tem perature extremes which can cause condensation within the instrument 27 Original Packaging Containers and materials identical to those used in factory packaging are available through Heweltt Packard offices If the instrument is being returned to Hewlett Packard for servicing attach Installation a tag indicating the type of service required return address model number and full serial number Ensure that the container is marked FRAGILE to assure careful handling In any correspondence refer to the instrument by model number and full serial number 28 Other Packaging The following general instructions should be used for repackaging with commercially available materials l Wrap the instrument in heavy paper or plastic If ship
10. ping to a Hewlett Packard Office or service center attach a tag in dicating the type of service required return address model number and full serial number 2 Use a strong shipping container A double wall carton made of 350 pound test material is adequate 3 Use enough shock absorbing material a 3 to 4 inch layer around all sides of the in strument to provide firm cushion and pre vent movement inside the container 4 Seal the shipping container securely 5 Mark the shipping container FRAGILE to assure careful handling ww 4 Operation 29 OPERATION 30 Features 31 Features of the HP 11667B are shown in Figure 2 1 INPUT PORT for incoming signal HP 11667B 2 3 OUTPUT PORTS used as exit ports for outgoing signal Output signal is 6 dB down in power from input signal Either port may be used as test or reference port since power is equal in both ports Typical in 502 system at DC Loss typically increases 05 dB GHz Figure 2 Instrument Features HP 11667B Operation 32 Operator s Check a measurement as shown in Figure 3 Successful measurement of known component verifies 33 The operator check consists of performing operation HP 83508 oniy 8756 HP 8756A SYSTEM SWEEP HP 83595A ee SCALAR NETWORK OSCILLATOR PLUG IN ANALYZER POS Z BLANK STGP SWEEP HP 83508 only HP 116648 SEVICE DETECTOR 115678 UNDER POWER
11. splitter to the bridge HP 11667B 38 Iftheadapter is connected to the bridge and a calibration is performed at the end of the adapter the directivity of the bridge is de graded and the measurement uncertainty is unacceptable 39 Ifacalibration is performed at the precision 3 5mm female port of the bridge and the adapter is connected to the power splitter the SWR ofthe adapter masks the SWR of the power splitter 40 Phase information is required to calibrate out the effects of the adapter The HP 8510 can be calibrated in either female or male precision 3 5mm and using internal error correction it has an effective directivity greater than 40 dB There fore to accuractely measure the SWR of the HP 11667B refer to the HP 8510 network analyzer Operating Manual HP 11667B Performance Tests 9 41 OUTPUT TRACKING TEST SPECIFICATION DC to 18 GHz 0 25 dB DC to 26 5 GHz 0 40 dB DESCRIPTION One output arm of the HP 11667B is terminated in 50 ohms A measurement is taken on the other arm and stored in the HP 8756A The load and detector are then reversed and a display minus memory reading is taken on the HP 8756A The flatness of the HP 11667B including the HP 11664B detector is displayed as peak to peak variation on the HP 8756A CRT HP 8756A SCALAR NETWORK ANALYZER 83508 SWEEP OSCILLATOR 8756 SYSTEM INTERFACE 83535 PLUG IN POS Z BLANK EEE GEN
12. sweep rate to 200 ms Allow 30 minutes warm up 2 On the HP 8756A press SHIFT DISPLAY to store the trace in memory 3 Reverse the output port connections 4 On the HP 8756A press DISPLAY until the M MEM LED is on Frequency tacking is the peak to peak variation of the CRT trace 10 HP 11667B Adjustments e 42 ADJUSTMENTS 43 The HP 11667B power splitter requires no electrical or mechanical adjustments 11 Service HP 11667B 44 SERVICE 45 Troubleshooting 46 Thecircuit elements of the 11667B are split into to identical channels A malfunction will usually occur in only one channel and can be confirmed by reversing connections to the splitter i 47 Because the power splitter works to 4 an ohmmeter can be used to check the inner conducter connections The resistance from either output center conductor to the input center conductor should be 50 ohms 2 ohms 48 Ordering Information 49 The HP 11667B has no field replaceable parts 50 Table 3 lists the precision 3 5mm adaptors available from Hewlett Packard Table 3 Precision 3 5 mm Adaptors Available From Hewlett Packard Precision 3 5mm m to NM 1250 1743 Precision 3 5mm m to N f 1250 1750 Precision 3 5mm f to N m 1250 1744 Precision 3 5mm f to N f 1250 1745 Precision 3 5mm m to Precision 7mm 1250 1746 Precision 3 5mm f to Precision 7mm 1257 1747 Precision 3 5mm m to Precisi
Download Pdf Manuals
Related Search