HP 5326A User's Manual
Contents
1. Option 001 8 digit display Option 002 Remote programming Controls All front panel controls are single line program mable except SEP COM separate common switch the check function is programmable 1 4 FAST NORM Mode Input Attenuators AC DC Input Signal Coupling Control Signal Single line control using either contact closure to ground or DTL drive on all lines except trigger levels which are analog programmed 3 Vdc Connector Rear panel connector HP 1251 0085 Amphenol 57 40300 375 36 pin blue ribbon Mating connector HP 1251 0084 Amphenol 57 30360 375 Option 003 Digital output for numerals and polarity only Code 4 line 1 2 4 8 BCD 1 state high 0 state 0 25 V at 1 mA 1 state 5 V open circuit 2 5 kQ source impedance nominal Print Command 5 Y to 0 V de coupled occurs at end of gate Storage Buffer storage is provided so BCD output is constant while next measurement is being made Inhibit Input Inhibits gate when instrument s cycle time is less than the time required for external equipment to interrogate BCD outputs Positive inhibit 5 Vdc Connector Rear panel connector HP 1251 0087 Amphenol 57 40500 375 50 pin blue ribbon Mating connector HP 1251 0086 Amphenol 57 30500 375 Option 004 Remote Programming including all signal input conditions Controls All front panel controls are programmable except FAST NORM Mode Control Signat Sing2. For any waveshape trigger error is less than M 0 0025 e Signal Slope V us Trigger error is less than 0 3 of one period periods averaged for signals with 40 dB or better signal to noise ratio and 100 mV rms amplitude Model 5326 27A reneral Information Table 1 3 Specifications Continued Sample Rate FAST position Continuously variable from less than 100 js to approximately 20 ms NORM position Continuously variable from less than 20 ms to approximately 5 seconds HOLD position Display can be held indefinitely Overtlow Neon indicates when display range is exceeded Operating Temperature 0 to 50 C Power Requirements 115 or 230 volts 10 50 to 60 Hz 70 watts maximum Weight Net 16 lb 7 4 kg Shipping 18 lb 16 oz 8 7 kg Accessories Furnished Power Cord 7 ft Rack Mount Kit DIMENSIONS ACCESSORIES AVAILABLE HP 105034 500 BNC Cable 4 ft 122 cm HP 105324 Extender Board Kit containing 2 ea 15 pin extender 5060 0049 1 ea 18 pin extender 5060 2041 and 1 ea Amplifier Extender 10532 60001 HP10542A Remote Programming Interface enables interfacing between the 5326 5327 Series counter with Option 004 and 40 bit Output Register Includes two 2 7 bit Digital to Analog Converters for level controls and decoding for time base and function selector HP Cable 562A 16C 6 ft 183 cm to connect 5326 5327 Series with Option 008 to HP 5050B or 5055A Digital Recorder
3. 3 12 Time Interval Average Set SAMPLE RATE control slightly clock wise out of OFF Set FAST NORM HOLD switch to NORM Set FUNCTION switch TI AVG A Set MULTIPLIER switch to number of time intervals to be averaged If start stop signals are from a common source connect signal to CHANNEL A input and set CHK SEP COM switch to COM If start stop signals are from separate sources connect start signal to CHANNEL A input and stop signal to CHANNEL B input and CHK SEP COM switch to SEP Set CHANNEL A SLOPE switch to for triggering on positive slope of signal or to for triggering on negative slope of signal Set CHANNEL A LEVEL and ATTEN to start the measurement at desired voltage level Select AC or DC coupling For fre quencies below 100 kHz use MARKER A OUTPUT jack on rear panel to display start ing point on oscilloscope Set CHANNEL AC DC LEVEL SLOPE and ATTEN to stop the measurement at desired level For frequencies below 100 kHz use MARKER B OUTPUT to display stopping point on oscilloscope Adjust SAMPLE RATE control for con venient measurement interval NOTE STOP to START delay must be 2150 ns and input rate should not be 10 MHz xM M and N integers Model 5326 27A Operation Figure 3 10 Ratio Measurements Set SAMPLE RATE control slightly clockwise out of OFF Set FAST NORM HOLD switch to NORM Set FUNCTION switch to FREQ A or FREQ C direct or prescaled Set MUTLIPLIER switch t
4. are available at the rear panel to intensity modulate an HP 180A oscilloscope The markers indicate the trigger point of the counter s input circuits and provide a visual means of adjusting the trigger points to measure the time interval between any two points and are useful to about 100 kHz 3 15 In time interval measurements Channel A opens the main gate and Channel B closes the main gate While the main gate is open the internal oscil lator divided by the setting of the MULTIPLIER switch is totalized by the counter and readout on the display The less the division factor the more pulses of the internal oscillator there are to count and there fore the better the resolution and accuracy 3 16 With time interval average the main gate is open for the number of time intervals selected by the MULTIPLIER switch The internal oscillator pulses not divided are totalized only during the individual time intervals Once Channel B triggers there must 3 1 Model 5826 27A Operation be a time lapse of 150 ns before Channel A can trigger Averaging of time intervals results in increased re solutions and reduced inaccuracies For a further explanation of theory refer to Paragraph 4 27 3 17 Ratio 3 18 The counter may be used to measure the ratio of two signals in either the frequency or period mode By setting the rear panel OSC INT EXT switch to EXT the counter will accept an external signal Fey for use as the internal
5. digit display 8 digits optional IM ohm and 50 ohm inputs display storage and blanking for insignificant digits in the display Decimal point and unit readouts are dis played automatically with each operating selection Two independent input channels are provided for time interval measurements Each input channel has an attenuator trigger slope selector level control ac de coupling and an oscilloscope marker output Table 1 1 lists the electrical and mechanical specifications 1 4 IDENTIFICATION 1 5 Hewlett Packard uses a two section serial num ber mounted on the rear panel Earlier instruments use an 8 digit serial number 000 00000 The first three digits are a serial prefix number the last five digits refer to the specific instrument Later instru ments use a 9 digit serial number 0000A00000 The first four digits are the serial prefix and the last five digits refer to the specific instrument If the serial prefix of your instrument differs from that listed on the title page of this manual there are differences between this manual and your instrument Lower serial prefixes are documented in Section VII and higher serial prefixes are covered with manual change sheets included with the manual If the change sheet is missing contact the nearest Hewlett Packard Sales and Service Office listed on the inside rear cover of this manual 1 6 APPLICATIONS 1 7 The 5326A 5327A Counters are particularly adaptable to timing
6. in FAST and hold the Hold line pin 16 to ground for the desired display time The display will continue for about 100 us after the ground is released Model 5326 27A Installation 2 53 BLANKING DEFEAT 2 54 This counter is designed to blank insignificant zeros zeros to left of data When blanking occurs the digital recorder output for the blanked columns is BCD 15 HHHH To use this instrument with a digital analog converter it is necessary to defeat the blanking feature by repositioning the two jumpers on the A9 Display board Move the jumpers to position 2 as shown in A9 Component Locator Section VII This connects pin 10 of ASU7 and A9U8 to 5 V Also lift the pin 1 lead of A8U2 and connect pin 1 to ground available at U2 pin 7 Model 5326 27A Operation SECTION IH OPERATION 3 1 INTRODUCTION 3 2 Section IH contains the operating information required to obtain the most effective performance from the instrument This includes a general descrip tion of the operating modes the function of all con trols and indicators a self check procedure and setup procedures for making basic measurements 3 3 OPERATING MODES 3 4 The following paragraphs describe the operating modes of totalize frequency period time interval and ratio 3 5 Totalize Mode 3 6 START and STOP positions on the FUNCTION selector allow manual opening and closing of the counter s main gate When the switch is in
7. measurements such as pulse width pulse repetition frequency and propagation Description delay The time mterval average mode measures time interval on repetitive signals with resolution better than one nanosecond When used with microwave test systems group delay phase and leve measure ments can be performed 1 8 OPTIONS 1 9 The instrument can be ordered with the following options Option 001 8 digit display Option 002 re mote programming Option 003 digital recorder out puts and Option 004 remote programming for all signal input conditions Table 1 1 Equipment Supplied HP Part No 8120 1348 Detachable Power 7 ft 231 em long Rack Mounting Kit 05326 60029 Table 1 2 Accessories Available 5050B 5055A Digital Recorders 562A 16C Interconnect Cable Digital Recorder 6 ft 183 cm 50 ohm BNC to BNC Coaxial Cable 4 ft 122 cm Circuit Board Extender 15 pin two required 10503 6001 5060 0049 Input Amplifier Circuit Board 10532 60001 Extender Circuit Board Extender 18 pin Extender Board Kit includes two 5060 0049 and one each 5060 2041 and 10532 60001 5060 2041 10532A 1 1 Model 5326 27A General Information 1 2 Table 1 3 Specifications INPUT CHANNELS A AND B Range de coupled 0 50 MHz ac coupled 20 Hz 50 MHz Sensitivity 0 1 V rms sine wave 0 3 V p p pulse 8 ns minim
8. oscillator This frequeney should be 100 Hz to 10 MHz at V rms minimum to 5 V peak maximum second signal FA applied to either INPUT A or C jack is used as the comparator signal The MULTIPLIER switch controls the resolution of the display For a ratio of frequencies the Ratio FA DISPLAYED NUMBER n e Fa MULTIPLIER SETTING For a ratio of periods P the Ratio Ext _ DISPLAYED NUMBER Pa E MULTIPLIER SETTING 3 19 Disregard the units and decimal point also ignore any zeros to the left of the most significant digit It makes no difference which signal is higher in frequency as long as the two frequencies are with in the specifications of their respective channels 3 20 MARKER OUTPUTS 3 21 Two marker output jacks are mounted on the counters rear panel These outputs provide a negative going 2 us pulse approx at DTL levels each time the input signal passes through the trigger point of Channel A or B The pulses may be used to trigger other circuits or may be applied to the Z axis of an HP 180 Oscilloscope When using the pulses to intensity modulate an oscilloscope note that the actual trigger point is the leading edge of the pulse The marker s pulse width determines the upper fre quency limit of the input signal The pulses overlap on the oscilloscope trace when the period of the signal is less than the pulse width 3 22 HYSTERESIS 3 23 Each input channel has a small amount of hysteres
9. the START position the counter does not measure frequency but instead counts the number of times the signal passes through the trigger point The input signal connected to the front panel CHANNEL A jack is divided by the MULTIPLIER switch setting prior to counting For example when the MULTIPLIER switch is set to the 1 position every pulse is counted When the switch is set to 10 the counter registers every thousandth pulse When the FUNCTION switch is set to STOP the counter stops totalizing and holds the displayed count until the RESET switch is pressed or the MULTIPLIER switch setting is changed If the FUNCTION switch is again set to START before a reset is generated the count continues to totalize from the previously displayed value With the FUNC TION switch set to START the scaled input signal is available at the rear panel TIME BASE OUTPUT jack The unit indicators and decimal points are blanked during the totalize mode The C light is on in START indicating counting is taking place 3 7 Frequency Modes 3 8 Three frequency modes are available in the 5327A Frequency A Frequency C prescaled and Fre quency C direct The prescale operation is not in cluded in the 5826A In the Frequency A mode the input signal connects to the high impedance CHANNEL A input jack and can be conditioned with the LEVEL SLOPE and ATTEN controls In the Fre quency C modes the input signal is connected to the INPUT jack
10. 3 Measurement un en Sects Sere 10 PERIODS 10 PERIODS 107 PERIODS 10 PERIODS T SEA 10 100 IK 10K 100K FREQUENCY MEASUREMENT 1 COUNT TIME BASE ACCURACY LIG PARTS IN 10 ASSUMED MEASUREMENT E iM 10M 100M MEASURED FREQUENCY Hz NOTE 16 16 PERIOD AVERAGE MEASUREMENT 1 COUNT TIME BASE ACCURACY TRIGGER ERROR 0 3 PERIOD COUNTED FREO IS 10MHz 550MHz ASSUMED TIME BASE ACCURACY lt 3X10 ACCURACY WHEN USING INTERNAL OSCILLATOR ACCURACY POSSIBLE WITH EXTERNAL OSCILLATOR CESIUM BEAM STANDARD FOR 550MHZ INPUT 10 USE LINE TO RIGHT OF ACTUAL GATE LENGTH TO DETERMINE ACCURACY OF MEASUREMENT SINCE 1 COUNT ERROR REPRESENTS 10 COUNTS OF INPUT SIGNAL WHEN PRESCALING BY 10 Model 5326 27A Operation Figure 3 4 Front Panel Controls and Indicators SAMPLE RATE control power Applies primary Works in conjunction with FAST NORM HOLD switch to control interval be tween measurements a FAST Varies display time from lt 100 us to gt 20 ms STORAGE switch rear panel must be ON to use this mode b NORM Varies display time from lt 20 ms to gt 5 seconds HOLD Holds display indefinitely RESET Switch Resets display and internal count to zero and starts new measurement INPUT 5327A 50 ohm input for 0 to 550 MHz frequency measurements Has de cou pling with INPUT C switch in 10 p
11. 50 ohm The signal is not conditioned by any front panel controls but may be counted either directly 50 MHz or by prescaling 550 MHz depending on the setting of the INPUT C switch The C channel of the 5326A model counts the signal directly 3 9 Period Modes 3 10 The period and period average modes allow single period measurements or multiple period averages to be made with input frequencies into CHANNEL A of up to 10 MHz These modes are use ful for making low frequency measurements where maximum resolution is desired 311 For single period measurements the MULTI PLIER switch scales the time base frequency and selects the placement of the decimal point and deter mines the resolution of the measurement 3 12 The period average mode is used for increased resolution and reduced inaccuracies For example if 10 period averaging is selected the counter will dis play the average of 100 periods with the proper decimal point In this example trigger error is 100 times less than in a single period measurement 3 13 Time interval Modes 3 14 Two modes of time interval measurements can be selected time interval and time interval average The time interval modes measure the time between points on a single waveform or between separate in put signals thus pulse width and phase differences can be measured Separate slope and level controls allow variable triggering levels on either the or slope Marker and outputs
12. 5326A 5327A TIMER COUNTER OPERATING AND SERVICE MANUAL SERIAL PREFIX 53264 1136A 5327A 1120A This manual applies to HP Model 5326A having serial prefix 1136A and HP Model 5327A having serial prefix 11204 SERIAL PREFIXES NOT LISTED For serial prefixes above 1136A 5326A and 1120A 53274 a Manual Supplement sheet is included with this manual For serial prefixes below 1136A and 11204 refer to Section of this manual Copyright HEWLETT PACKARD COMPANY 1972 5301 STEVENS CREEK BLVD SANTA CLARA CALIF 95050 Printed MAR 1972 THIS MANUAL PRINTED ON 100 RECYCLED PAPER HEWLETT PACKARD Model 5326 27A General Information Figure 1 1 HP Model 5326A 5327A Tim r Counter APT DT SEEN mnt MODEL 5326A i E GU EYA TIMER hee kR ig MODEL 5327A POWER CORD 1 0 Model 5326 27A General Information SECTION GENERAL INFORMATION 1 1 DESCRIPTION 1 2 The Hewlett Packard Models 5326A 5327A are frequency counters that have a variety of functions The basic difference between the two models is the addition of the prescaler assembly in the 53274A This assembly increases the upper frequency limit from 50 MHz to 550 MHz The 53264 uses a high sensitivity 50 ohm input amplifier in place of the prescaler 1 3 The instruments measure frequency period period average time interval time interval average and ratio Features include a 7
13. A 0 550 MHz 5327A Input Channel A channel C for direct and for prescaled switchable Channel A provides triggered frequency measurement Gate Times 0 1 us to 10 s in decade steps Accuracy Direct 1 count time base accuracy Prescaled 10 counts time base accuracy Display kHz MHz or GHz with positioned decimal point TIME INTERVAL Range 0 1 us to 10 seconds input Channels and B can be common or separate Frequency Counted 10 MHz to 0 1 Hz in decade steps Accuracy 1 count t time base accuracy trigger error Display us ms seconds or 10 s of seconds with positioned decimal point TIME INTERVAL AVERAGE Range 0 15 ns to 10 s Intervals Averaged 1 108 selectable in decade steps 10 counts of input frequency 1 count displayed Model 5326 27A General Information Table 1 3 Specifications Continued input Channels and can be common or separate Frequency Counted 10 MHz Minimum Time Stop to Start 150 ns Accuracy time base accuracy 2ns trigger error 100 ns intervals averaged Display ns us with positioned decimal point PERIOD Range 0 10 MHz Input Channel A Frequency Counted 10 MHz to 0 1 Hz in decade steps Accuracy count time base accuracy trigger error Display us ms seconds or 10 s of seconds with positioned decimal point PERIOD AVERAGE Range 0 10 MHz Periods Averaged 1 10 selectabl
14. DC switch to AC or DC Connect input signal 0 to 10 MHz to CHANNEL A input jack Adjust SAMPLE RATE control for con venient measurement interval 3 11 Model 5326 27A Operation Figure 3 9 Time Interval Measurements Single Time Interval Set SAMPLE RATE control slightly clock wise out of OFF Set FAST NORM HOLD switch to NORM Set FUNCTION switch to T L A to B Set MUTLIPLIER switch for desired resolution If start stop signals are from a common source connect signal to CHANNEL A in put and set CHK SEP COM switch to COM If start stop signals are from sepa rate sources connect start signal to CHANNEL A input and stop signal to CHANNEL B input and CHK SEP COM switch to SEP Set CHANNEL A SLOPE switch to for triggering on positive slope of signal or to for triggering on negative slope of signal Set CHANNEL A LEVEL and ATTEN switches to start measurement at desired voltage level Select AC or DC coupling For frequencies below 100 kHz use MARKER A OUTPUT jack on rear panel to display starting point on an oscilloscope Set CHANNEL B AC DC LEVEL SLOPE and ATTEN controls to stop measurement at desired level For frequencies below 100 kHz use MARKER B OUTPUT to dis play stopping point on oscilloscope Adjust SAMPLE RATE control for con venient measurement interval NOTE There must be at least 150 ns between the STOP pulse Channel B trigger and the next START pulse Channel A trigger
15. M position When applying two separate inputs set switch to SEP When set to COM input impedance is 500 kQ shunted with less than 50 pF C count light Lights when counter s main gate is open For short duration gate times the annunciator circuits include a 50 ms one shot MV to allow a visible flash of the C light asterisk Indicates that proper units are not displayed with combination of function time base selection To interpret display add a zero to the right of least significant digit displayed on the counter or Model 5326 27A Operation Figure 3 5 Rear Panel Controis and Connectors STORAGE switch When set to ON pro vides display storage while new measure ment is being made In OFF position allows continuous display of counting process OSC INT EXT switch In INT position selects normal counter operation using internal time base In EXT position per mits use of external time base OSC jack With INT EXT switch set to INT provides 10 MHz gt 3 V p p output no load 500 series impedance With INT EXT switch set to EXT allows use of external time base from 100 Hz to 10 MHz at gt 1 volt rms 5 V peak maximum MARKER A and B jacks Provides marker outputs to intensity modulate HP 180 Oscillo scope Markers begin coincident with chan nel trigger points GATE jack Provides gt 2 4 volts output open circuit for external use Has 500 series impedance Output is low when counter s ma
16. OD AVERAGE Pin2 T L AVG Pin 3 T I A to B Pin 4 PERIOD Pin 5 FREQ Pin 6 FREQ C DIRECT Pin 7 FREQ C 10 Pins 7 and 18 2 26 Time Base Selection Programming 2 27 To program the Time Base ground lt 7 V the proper line at J10 as follows A us l Pin 19 1 us 10 Pin 20 10 us 10 Pin 21 1 ms 10 Pin 22 1 ms 10 Pin 23 10 ms 105 Pin 24 1 s 106 Pin 25 1 s 107 Pin 26 10 s 10 Pin 27 2 28 Trigger Level Programming 2 29 To program the trigger level the LEVEL con trols must be set to PRESET Select the trigger level by placing a dc voltage between 3 0 and 3 0 volts on the level input line Level A J10 pin 30 Level B J10 pin 31 This voltage times the attenuator setting is the trigger level Preset is programmed by leaving the pin open on contact closure to ground Grounding is preferable if noise exists on the remote program ming line 2 30 The front panel LEVEL controls may be used manually if programming of the trigger levels is un desirable Also note the AC DC and ATTEN switches on thefront panel must be set manually as they are NOT programmable Model 5326 27A Installation 2 31 Sample Rate Adjustment 2 32 Adjusting the display time can be accomplished in several ways a Manually adjust the display time by using the front panel SAMPLE RATE controls b Set the SAMPLE RATE control cw and the FAST NORM HOLD switch to NORM and connect a 1 megohm pot in series with a 1 5k ohm resis
17. e ment TE input range is 0 1 us to 10 sec The internal time base frequency is divided by the setting of the MULTIPLIER switch and totalized for subsequent display The more cycles of the oscillator frequency that are counted during A to B time the better the resolution There must be 150 ns deadtime between Channel B and Channel A trigger points e PERIOD A Sets counter to measure a single period of the signal applied to CHANNEL A input Use MUTLIPLIER switch to set counted internal oscillator fre quency and therefore the desire resolution Frequency input range is 0 to 10 MHz f FREQ A Sets counter to measure frequency applied to CHANNEL A input Use TIME BASE switch to set gate time and resolution Frequency input range is 0 to 50 MHz 3 5 Model 5326 27A Operation 3 6 Figure 3 4 Front Panel Controls and Indicators Continued g FREQ C Similar to FREQ A except sets counter to measure frequency applied to INPUT C jack 50 ohm input impedance 5 V rms 7 6 Y peak maximum input Fre quency range is 0 to 550 MHz prescaled or 1 kHz to 50 kHz direct For the 5326B the frequency range is 0 to 50 MHz See INPUT C TIME BASE MULTIPLIER switch The function of the switch changes with each mode of operation a TOTALIZE Determines scaling factor for input signal prior to counting b PERIOD AVG A Selects number of periods to be averaged FTI AVG A to B Selects number of time i
18. e in decade steps input Channel A Frequency Counted 10 MHz Accuracy time base accuracy 1 count t trigger error Display ns us with positioned decimal point RATIO Display Fa Fext or FC Fext times MULTIPLIER M M 1 to 10 selectable in decade steps Range FA Channel A or Channel C 0 50 MHz Fext External Oscillator Input 100 Hz to 10 MHz Mode Operating mode will be either FREQUENCY A or FREQUENCY C Accuracy 1 count of Fa trigger error of Fext TIME BASE Crystal Frequency 10 MHz Stabitity Aging Rate lt 3 parts in 10 mo Temperature lt 2 5 parts in 10 0 to 50 C Line Voltage part in 10 for 10 line variation Short term Fluctuation Typically lt 5 parts in 10 one second average at con stant temperature Oscillator Output 10 MHz TTL type output levels 500 series impedance at rear panel BNC External Input 100 Hz 10 MHz 1 V rms into 1kQ Time Base Output Negative pulses 3 V to 0 V open circuit typically 100 ns wide In START output is 10 MHz divided by TIME BASE MULTIPLIER switch setting Available at rear panel BNC Gate Output TTL level pulses low while gate open high while gate closed Available at rear panel BNC GENERAL Display 7 digits 8 optional Blanking Suppresses display of unwanted zeros left of the most significant digit Display Storage Holds reading between samples Rear panel switch overrides storage
19. ents 2 20 lines may be controlled by TTL or DTL signals or contact closure to ground when the unit is being remotely programmed except the trigger levels which are programmed by an analog level if pro grammed and the display time line Hold J10 pin 35 which should NOT be pulled up to 5 V by less than 2000 while programming 2 21 When the unit is NOT being programmed Ext line high all the lines should be left open or pulled up to 5 V by not less than 5kQ except the trigger levels which should be open circuited 2 22 Remote Programming Procedure 2 23 In order to remotely program the counter the following must be done a Set FUNCTION switch to any function but START or STOP b Ground the EXT line at rear panel REMOTE PROGRAM connector Ji0 17 This disables the front panel switches Ground is available at J10 36 c Select the desired function d Select the desired time base e Select the slope or for CHANNEL A and B This is accomplished by grounding the Slope line for and leaving it open for Slope A line is J10 28 Slope B line is J10 29 Select the trigger level for input signal 8 Adjust the display time h Manual reset is available by grounding lt 7 V pin 34 Check is available by grounding pin 14 2 24 Function Selection Programming 2 25 To program the desired function ground lt 7 V the proper line at J10 as follows STOP Pin 32 START Pins 1 and 32 PERI
20. in gate is open and high when gate is closed 10 11 TIME BASE OUTPUT jack Provides ative going gt 3 to 0 V pulses open circuit gt 50 nanoseconds wide The line has a 500 series Impedance In START frequency out put is CHANNEL A signal divided by MULTI PLESR setting AC LINE IEC type with offset pin con nected to chassis AC LINE FUSE at 230 V 1 50 at 115 V 800 mA 115 230 volt switch driver and slide voltage Insert narrow screw switch to show desired DIGITAL RECORDER connector Option 003 only 50 pin connector for digital recorder interconnection REMOTE PROGRAM connector Option 002 36 pin connector to allow remote con trol of counter modes and functions Option 004 50 pin connector to allow re mote control of all counter functions except FAST NORM Model 0326 27A Operation wise out of OFF MULTIPLIER DISPLAY ANNUNCIATOR 24 Set FAST NORM HOLD switch to NORM A A 10 000 us 3 Set FUNCTION switch to STOP 103 0 ns 10 00 ns 4 Set MULTIPLIER selector to 1 los PR gt 107 90000 ns 5 Set CHK SEP COM switch to CHK 108 000000 ns 6 Press RESET and check that counter s right i hand column displays a 0 and all other digits 11 Set FUNCTION to T L A to B Rotate are blanked MULTIPLIER switch as shown in the following table Step 12 and check for proper display 7 Set FUNCTION switch to START and check 1 y that counter totalizes and light is
21. is about 100 mV If the SLOPE switch is set to the trigger pulse occurs at the top of the hysteresis window If the SLOPE switch is set to the pulse occurs on the bottom line of the window In other words the signal must pass through the entire hysteresis window before a trigger pulse is generated 3 2 3 24 When measuring frequency or period the counter positions the hysteresis band around zero see Figure 3 1 This assumes a waveform with no de component and the counter s LEVEL control is in the PRESET position The input amplifier then yields maximum input sensitivity for both positions of the SLOPE switch The offset introduces no measure ment error since the trigger point is repetitive from cycle to cycle The trigger point is point A for slope and point B for slope Figure 3 1 Hysteresis Offset SLOPE _ HYSTERESIS WINDOW 3 25 Time interval Compensation 3 26 In the time interval modes only both input amplifiers have an automatic compensation network that keeps the trigger level at the same potential when switching from positive to negative slope see Figure 32 In this example the window shifts upward to accomplish this There is the possibility therefore that if Point is near the top of the signal switching to negative slope will place a portion of the window outside the signal C In such case there would be no triggering When switching from time interval to f
22. le line control using either contact closure to ground or DTL drive on all lines except trigger levels which are analog programmable 3 Vde Connector Rear panel connector HP 1251 0087 Amphenol 57 40500 375 50 pin blue ribbon Mating Connector HP 1251 0086 Amphenol 57 30500 375 Model 5326 27A Installation SECTION II INSTALLATION 2 1 INTRODUCTION 2 2 This section contains information for unpacking inspection repacking storage and installation The instructions for remote programming are also given in this section 2 3 UNPACKING AND INSPECTION 2 4 If the shipping carton is damaged ask that the carrier s agent be present when the instrument is un packed Inspect the instrument for damage scratches dents broken knobs etc If the instrument is damaged or fails to self check Self Check Procedures Table 3 1 notify the carrier and nearest Hewlett Packard Sales and Service Office immediately offices are listed at the back of this manual Retain the shipping carton and padding material for the carrier s inspection The sales and service office will arrange for the repair or replacement of your instrument with out waiting for the claim against the carrier to be settied 2 5 STORAGE AND SHIPMENT 26 PACKAGING To protect valuable electronic equipment during storage or shipment always use the best packaging methods available Your Hewlett Packard Sales and Service Office can provide packing mate
23. maximum 5 mV rms minimum to INPUT connector rear panel Input impedance is 500 nominal For the 53264 input frequency is 0 to 50 MHz Adjust SAMPLE RATE control for con venient measurement interval NOTE For frequencies from 0 to 550 MHz with minimum levels of 100 mV rms connect signal to INPUT C jack and place INPUT C switch in 10 position CAUTION Damage will occur if INPUT C voltage specifications are exceeded 10 Model 5326 27A Operation Figure 3 8 Period Measurements Period Set SAMPLE RATE control slightly clock wise out of OFF Set FAST NORM HOLD switch to NORM Set FUNCTION switch to PERIOD A Set MULTIPLIER resolution Set CHK SEP COM switch to SEP Set CHANNEL A LEVEL control to desired trigger level or to PRESET to trigger at zero volts switch for desired Set ATTEN switch to match input signal s amplitude Set AC DC switch to AC or DC Connect input signal 0 to 10 MHz to CHANNEL A input jack Adjust SAMPLE RATE control for a con venient interval between measurements 10 Period Average Set SAMPLE RATE control slightly clock wise out of OFF Set FAST NORM HOLD switch to NORM Set FUNCTION switch to PERIOD AVG A Set MULTIPLIER switch to number of periods to be averaged Set CHK SEP COM switch to SEP Set CHANNEL A LEVEL control to desired trigger level or to PRESET to trigger at zero volts Set ATTEN switch to match input signal amplitude Set AC
24. n 107 A r to _ 3 X 105 I X 107 107 error 8 8 X 10 6 X 107 3 9 X 10 or 8 9 parts in 105 Model 5326 27A Operation 331 PERIOD MEASUREMENTS There are three factors contributing to the accuracy of period average measurements a The aging rate of the 10 MHz crystal standard b The 1 count ambiguity c The trigger error for one period Assuming a signal to noise ratio of 40 dB the trigger error is less than 0 8 at rate sensi tivity general formula for finding the per centage error to be expected under various conditions 1s as follows A 100 2 t amp E nf A Accuracy in percent f z Time base frequency counted fy Frequency of input signal Hz n Number of periods averaged e 3x 107 trigger error for one period 40 dB S N at rated sensitivity E time base accuracy monthy drift rate of individual time base times the number of months since calibration absolute value of off set at standard ization frequency change due to ambient temperature change and line voltage effects A plot of the above formula is shown in Figure 3 3 Model 5326 27A Operation ERROR IN MEASUREMENT PERCENTAGE 10 1 0 1 0 01 0 004 0 00901 0 0000 7 0 000001 0 0000001 0 00000001 0 000000001 3 4 107 1x107 1X107 1X107 1 1075 1X10 75 1X107 1X107 1X107 1X107 1X107 1X10 FRACTION 1 10 1 10 9 1 Figure 3
25. ntervals to be averaged d TI A to B Selects scaling factor for internal oscillator signal e PERIOD A Selects scaling factor for internal oscillator signal f FREQ A and FREQ Sets gate time SLOPE switch Permits triggering on positive or negative slope of input signal AC DC switch Selects direct or capacitor coupling for input signal Minimum input frequency on AC setting is 20 Hz ATTEN switch Selects attenuation for input signal Used in conjunction with LEVEL control to set input triggering point Maxi mum input 250 V rms on all ranges except 25 V rms on X1 range above 50 kHz Recom mended input is 0 1 V rms to 2 V rms times ATTEN setting 10 11 13 14 LEVEL control Used in conjunction with ATTEN switch to determine voltage at which triggering occurs With X1 attenuator setting level is variable 3 V on X10 30 V and X100 300 V Input jacks Input jacks to Channels A and B Input impedance is MQ shunted by less than 25 pF By using a 10 to 1 divider probe input impedance can be increased to 10 MQ Trigger lamps adjacent to input jacks indicate when amplifier triggering occurs CHK SEP COM switch common Check separate a CHK Connects internal 10 MHz time base to Channels A and B circuitry to check that unit is functioning No indication in T L or T I Avg ignore displayed digits in period average b COM SEP Connects A and B inputs in parallel when set to CO
26. o desired divid ing factor for Foxy Set CHK SEP COM switch to SEP Set CHANNEL A LEVEL control to desired trigger level or to PRESET to trigger at zero volts 10 11 10 REAR PANEL Set ATTEN switch to match input amplitude Set AC DC switch to AC or DC Connect Fa 0 to 50 MHz to CHANNEL A input jack or FC to INPUT C Set OSC INT EXT switch to EXT rear panel Connect Fext to OSC jack Fext can be 100 Hz to 10 MHz 1 V rms min to 5 V peak maximum Adjust SAMPLE RATE control for convenient measurement interval gt FAorFC__ DISPLAY Ratio R MULTIPLIER units and decimal point Disregard 3 13 Model 5326 27A Operation 10 Figure 3 11 Totalize Measurements Set SAMPLE RATE control slightly clock wise out of OFF Set FAST NORM HOLD switch to NORM Set FUNCTION switch to STOP Set MULTIPLIER switch to input signal scaling factor Set CHK SEP COM switch to SEP Set LEVEL control to desired trigger level or to PRESET for triggering at zero volts Set ATTEN switch to match input signal s amplitude Set AC DC switch to AC or DC Connect input signal 0 to 10 MHz to CHANNEL A input jack Set FUNCTION switch to START NOTE A scaled output of the input signal is available at the rear panel TIME BASE OUTPUT BNC The division is determined by the MULTIPLIER switch setting
27. ogrammed EXT line high all the lines should be left open or pulled up to 5 V by not less than 5kQ except the trigger levels which should be open circuited 2 3 Model 5326 27A Installation 2 40 Remote Programming Procedure 2 41 In order to remotely program the counter the following must be done a Set FUNCTION switch to any position but START or STOP b Ground the EXT line at rear panel REMOTE PROGRAM connector J10 34 This disables the front panel switches Ground is available at J10 36 Select the desired function d Select the desired time base e Select the signal conditioning f Select the trigger level for input signal g Adjust the display time h Manual reset is available by ground lt 7 V pin 17 Check is available by grounding pin 37 2 42 Function Selection Programming 2 43 To program the desired function ground lt 7 V the proper line at J10 as follows STOP Pin 19 START Pins 46 19 PERIOD AVERAGE Pin 47 TE AVG Pin 45 T I A to B Pin 44 PERIOD Pin 43 FREQ A Pin 42 FREQ C DIRECT Pin 41 FREQ C 10 Pin 33 5327A only 2 44 Time Base Selection Programming 2 45 To program the time base ground lt 7 V the proper line at J10 as follows 1 us l Pin 28 1 us 10 Pin 29 10 us 10 Pin 27 1 ms 105 Pin 26 1 ms 104 Pin 25 10 ms 10 Pin 24 1 s 105 Pin 30 1 s 107 Pin 81 10 s 108 Pin 32 2 4 2 46 Signal Conditioning Programming 2 47 Program the input condi
28. on 12 Set FUNCTION to PERIOD A Set MULTI Check that OF light goes on as display over PLIER switch as shown in the following flows Set TIME BASE MULTIPLIER to each table and check for proper display position and check that counter totalizes in each position Time Interval and Period Self Check ag R 8 Set FUNCTION switch to STOP Check that MULTIPLIER DISPLAY ANNUNCIATOR C light goes out and display is held 1 1 count us 10 0 HS 102 66 ms 9 Set FUNCTION to PERIOD AVG Set 108 0 ms MULTIPLIER as shown in table below and 104 0 ms check for proper display 195 00 8 106 0 s 107 0 S Period Average Self Check 108 0 MULTIPLIER DISPLAY ANNUNCIATOR NOTE For Time Interval Self Check display is 1 1 0 us for MULTIPLIER setting of 1 10 10 us 102 100 MS 13 Set FUNCTION to FREQ A Set TIME BASE 103 100 0 ns Be o FREQ A Se 104 100 00 switch as shown in table below and check 105 100 000 R for proper display 106 100 0000 ns 107 Standard 00 00000 ns OF Frequency A Self Check 107 Option 001 100 00000 ns en 6 060060 ns OF aff 0 TIME BASE DISPLAY ANNUNCIATOR 108 Option 001 00 000000 ns OF lus 01 1 count GHz lus 10 count MHz NOTE 10 us 10 0 1 count MHz Digits noted are for reference actual ms pe en ae et EN ms 10 1 coun Z display may differ by several counts Toan 160000 kHz is 10000 00 1 count kHz ls 0000 000 1 count kHz OF 10 Set FUNCTION to TI AVG A to B Se
29. osition and sensitivity of 100 mV rms sine wave 300 mV peak to peak pulse Maximum input is 5 volts referenced to ground DO NOT EX CEED Trigger level is zero volts The input is ac coupled with the INPUT C switch in DIRECT position The frequency range is 1 kHz to 50 MHz with a sensitivity of 5 mV INPUT C 5326A 50 ohm input for 0 to 50 MHz frequency measurements Has de cou pling and sensitivity of 5 mV rms sine wave Trigger level is zero volts Maximum input is 5 volts referenced to ground DO NOT EXCEED FUNCTION selector Selects mode of oper ation Blue lettering matches corresponding blue lettering on TIME BASE MULTIPLIER switch a STOP START Used for totalize mode to manually open and close counter s main gate and to turn scaled output on and off Frequency input range is 0 to 10 MHz b PERIOD AVG Sets counter to measure period of signal applied to CHANNEL A input Use MULTIPLIER switch to select number of periods to be averaged Input frequency range is 0 to 10 MHz c TL AVG A to B Sets counter to measure average time interval A to B Channel A starts interval and Channel B stops the interval Use MULTIPLIER selector to set number of time intervals to be averaged Time interval input range is 150 ps to 10 sec there must be a 150 ns deadtime between intervais d T I A to B Sets counter to measure time interval A to B Channel A starts meas urement and Channel B stops the measur
30. ottom edge of front panel using two screws on outer edges of filler strip Omit the center screw e Attach flanges to front end of sides larger corner notch toward bottom of instrument Instrument is now ready to mount in standard rack CAUTION Ambient temperature in rack during operation should not exceed 122 F 50 C Be sure instrument position in rack permits adequate air circulation and that nearby equipment does not dis charge hot air directly on the instrument 2 10 POWER CONNECTION 2 11 LINE VOLTAGE The counter may be operated from either 115 or 230 volt 410 power lines with frequencies from 50 to 60 Hz A shde switch on the rear panel permits quick conversion for operation from either voltage Insert a narrow blade screw driver in the switch slot and slide the switch to the right for 230 volt operation 230 marking exposed or to the left for 115 volt operation 115 marking exposed The counter is supplied with a 115 volt fuse be sure to change this fuse for 230 volt operation see Table 2 1 CAUTION Before plugging instrument to ac power line be sure slide switch is properly positioned 2 1 Model 5326 27A Installation Table 2 1 115 230 Voit Conversion Line Voltage Conversion 115 Voit 230 Voit Slide Switch Left 115 AC Line Fuse Right 230 0 8 Ampere Slow Blow HP 2110 0920 1 50 Ampere Slow Blow HP 2110 0304 2 12 POWER CABLE The counter i
31. requency or vice versa the trigger point shifts by half the hysteresis band rigure 3 2 Hysteresis Compensation SLOPE 3 27 ACCURACY 3 28 FREQUENCY MEASUREMENTS The basic counter accuracy is determined by two factors One factor is the aging rate of the 10 MHz crystal standard in the time base less than 3 parts in 107 per month A second factor is the inherent error of 1 count of the display s least significant digit which is present in all electronic counters This error is due to phasing be tween the timing pulse that operates the electronic gate and the pulses that pass through the gate to the counting assembly The chart in Figure 3 3 shows the error possible for frequency and period measurements 3 29 The formula for determining the actual fre quency is given as follows error o tE f x gate length sec The expression 1 f X gate length sec equals the 1 count ambiguity where fj equals meas ured frequency Hz and gate length equals the selected gate time in seconds E equals the time base accuracy monthly drift rate of the individual time base times the number of months since calibration frequency change due to ambient temperature change absolute off set at standardization and line voltage effects 3 30 An example of frequency error calculation is as follows 3 MHz 3 X 10 Hz gate length 1 sec 1 X 107 E 3 parts in 107 per month times 2 months 6 parts i
32. rial such as that used for original factory pack aging Contract packaging companies in many cities can provide dependable custom packaging on short notice Here are two recommended packaging methods a RUBBERIZED HAIR Cover painted surfaces of instrument with protective wrapping paper Pack instrument securely in strong corrugated container 350 ib sq in bursting test with 2 inch rubberized hair pads placed along all surfaces of the instrument Insert fillers between pads and container to ensure a snug fit b EXCELSIOR Cover painted surfaces of in instrument with protective wrapping paper Pack instrument in strong corrugated container 350 1b sq in bursting test with a layer of excelsior about six inches thick packed firmly against all surfaces of the instrument 2 7 ENVIRONMENT Conditions during storage and shipment should nermally be limited as follows a Maximum altitude 25 000 feet b Minimum temperature 40 F 40 C c Maximum temperature 167 F 750 2 8 RACK INSTALLATION 2 9 The counter is ready for bench operation as shipped from the factory Additional parts necessary for rack mounting are packaged with the instrument To convert to rack installation proceed as follows a Remove tilt stand b Remove feet press the foot release button slide foot toward center of instrument and lift off Remove adhesive backed trim strips at front end of sides d Attach filler strip along b
33. s equipped with a detachable 3 wire power cable Proceed as follows for installation a Connect plug 3 socket connector to ac line jack at rear of instrument b Connect plug 2 blade with round grounding pin to 3 wire grounded power outlet Exposed portions of instrument are grounded through the round pin on the plug for safety when only 2 blade outlet is available use connector adapter HP Part No 1251 0048 then connect short wire from side of adapter to ground 2 13 REMOTE PROGRAMMING OPTION 002 2 14 The following paragraphs describe remote pro gramming requirements for the counter with Option 002 See Paragraph 2 33 for Option 004 programming 2 15 Front Panel Controls 2 16 The following front panel controls are program mable a FUNCTION b TIME BASE MULTIPLIER CHECK function d SLOPE e SAMPLE RATE and HOLD f LEVEL controls g INPUT switch 5327A only h RESET 2 17 The following front panel controls are NOT programmable a AC DC b SEP COM FAST NORM d ATTEN 2 2 2 18 The trigger level controls may be remotely pro grammed or the front panel LEVEL controls may be used It is possible to program the LEVEL controls without programming the remainder of the front panel controls When remote programming is used the LEVEL controls must be set to PRESET Display time may be remotely programmed and or the front panel controls may be used 2 19 Remote Programming Requirem
34. t 10000 000 1 count kHz Option 001 MULTIPLIER as shown in table below and 108 000 0000 1 count kHz OF Set SAMPLE RATE control slightly clock check for proper display Table 3 1 Self Check Time Interval Average Self Check 0000 0000 1 count kHz OF Opt 001 Model 5326 27A Operation Figure 3 6 Frequency A Measurements Set SAMPLE RATE control slightly clock 7 wise out of OFF Set FAST NORM HOLD switch to NORM Set FUNCTION switch to FREQ A 10 Set TIME BASE switch for desired gate time Set CHK SEP COM switch to SEP Set CHANNEL A LEVEL control to desired trigger level or to PRESET to trigger at zero volts Set ATTEN switch to match input signal amplitude Set AC DC switch to AC or DC Connect input signal 0 to 50 MHz to CHANNEL A input jack Adjust SAMPLE RATE control for con venient measurement interval NOTE When the input signal is removed from CHANNEL A or the signal level is in sufficient to trigger Channel A the count light C will not cycle This is normal for this counter and does not indicate a malfunction Model 5326 27A Operation DAA Figure 3 7 Frequency C Measurements Set SAMPLE RATE control slightly clock wise out of OFF Set FAST NORM HOLD switch to NORM Set FUNCTION switch to FREQ C Set TIME BASE switch for desired resolution Set CHK SEP COM switch to SEP Set INPUT C switch to DIRECT Connect input signal 1 kHz to 50 MHz V peak
35. tions by urn the proper line as follows CONDITION INPUT AC DC AC H DC L SLOPE A 23 H L ATTENUATOR 13 14 1 18 L 14 H X10 13 H 14 L X100 AC DC B AC H DC L SLOPE B H ATTENUATOR B 9 H 10 H 9 L 10 H X10 9 H 10 L X100 SEP COM COM L SEP H CHECK CHK L 2 48 Trigger Level Programming 2 49 To program the trigger level the LEVEL con trols must be set to PRESET Select the trigger level by placing a dc voltage between 3 0 and 3 0 volts on the level input line Level A J10 pin 21 Level B 10 pin 20 This voltage times the attenuator setting is the trigger level Preset is programmed by leaving the pin open or contact closure to ground Grounding is preferable if noise exists on the remote programming line 2 50 The front panel LEVEL controls may be used manually if programming of the trigger levels is undesirable 2 51 Sample Rate Adjustment 2 52 Adjusting the display time can be accomplished In several ways a Manually adjust the display time by using the front panel SAMPLE RATE controls b Set the SAMPLE RATE control cw and the FAST NORM HOLD switch to NORM and connect a 1 megohm pot in series with a 1 5k ohm resistor from 5 V to pin 16 This will give a display time range of about 10 ms to 5 sec If a shorter time is desired set the FAST NORM HOLD switch to FAST which gives a range of about 50 us to 10 ms c Set the SAMPLE RATE control cw
36. tor from 5 V to pin 35 This will give a display time range of about 10 ms to 5 sec If a shorter time is desired set the FAST NORM HOLD switch to FAST which gives a range of about 50 us to 10 ms c Set the SAMPLE RATE control cw in FAST and hold the Hold line pin 35 to ground for the desired display time The display will continue for about 100 us after the ground is released 2 33 REMOTE PROGRAMMING OPTION 604 2 34 The following paragraphs describe remote pro gramming requirements for the counter with Option 004 2 35 Front Panel Controis 2 36 All front panel controls are programmable ex cept the FAST NORM HOLD switch The trigger level controls may be remotely programmed or the front panel LEVEL controls may be used It is pos sible to program the front panel LEVEL controls with out programming the remainder of the front panel controls When remote programming the trigger levels the LEVEL controls must be set to PRESET The display time may be remotely programmed and or the front panel controls may be used 2 37 Remote Programming Requirements 2 38 All lines may be controlled by TTL or DTL signals or contact closure to ground when the unit is being remotely programmed except the trigger levels which are programmed by an analog level if pro grammed and the display time line Hold J10 pin 16 which should NOT be pulled up to 5 V by less than 2000 while programming 2 39 When the unit is NOT being pr
37. um pulse width Sensitivity can be decreased by 10 or 100 times using the ATTENUATOR switch impedance MQ shunted by less than 25 pF Dynamic Input Voltage Range 0 1 to 3 V rms ac times attenuator setting 5 Vdc times attenuator setting Trigger Level PRESET to center triggering about 0 V or variable over the range of 3 V to 3 V times attenuator setting Trigger threshold band lt 1 0 mV referred to input at maximum frequency Overload Protection 250 V rms on all attenuator settings except 25 V rms on X1 above 50 kHz Siope Independent selection of positive or negative slope Channel Inputs Common or separate lines Marker Outputs Rear panel BNC s DTL pulse low for approximately 2 us after trigger point for A and B channels INPUT CHANNEL C 5327A Range direct kHz 50 MHz ac coupled prescaled 0 550 MHz de coupled Sensitivity direct 5 mV rms prescaled 100 mV rms Impedance 5002 nominal Maximum input 5 volts rms 7 5 volts peak Trigger Level 0 volts 5326A Range 0 to 50 MHz de coupled Sensitivity 5 mV rms impedance 500 nominal Maximum input 5 volts rms 7 5 volts peak Trigger Level 0 volts CAUTION Do not exceed voltage specification or damage will occur START Totalizing and Scaling Range 0 10 MHz Factor 1 10 selectable in decade steps Output Rear panel TIME BASE BNC Display Channel A input divided by scaling factor FREQUENCY Range 0 50 MHz 5326
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