PM 6611 80MHz Universal counter PM 6612 80MHz Counter timer
Contents
1. Optional accessories A complete list of optional accessories for both the PM 6620 Series and the PM 6610 Seres appears one page 1982. charging current is automatically con trolled to protect the batteries against overcharge For mobile field use the 11 8 28V power receptacle enables supply from external batteries for instance from the cigarette lighter socket in your car ORDERING PROCEDURE PM 661 01 80 250 520 1000 1300 MHz Counter including time base oscil lator PM 9677 PM 661 02 idem but including PM 9678 PM 661 03 idem but including PM 9679 PM 661 04 idem but including PM 9690 PM 661 05 idem but including PM 9691 PM 9668 if off set unit PM 9669 01 19 in rack mount adapter to fit one unit i PM 9669 02 19 in rack mount adapter to fit two units PM 9672 Carrying case PM 9673 Battery recharging unit PM 9674 BCD output unit PM 9675 Digital to Analog converter PM 9676 Bus line interface IEC TC66 The time base oscillators PM 9678 PM 9679 PM 9690 and PM 9691 can be ordered also separately to upgrade the counter afterwards It should be noted that the options PM 9673 PM 9674 PM 9675 and PM 9676 CANNOT be combined TECHNICAL SPECIFICATION FREQUENCY Range 10Hz 80MHz PM 6611 10Hz 80MHz PM 6612 10Hz 250MHz PM 6613 10Hz 520MHz PM 6614 10Hz 1GHz PM 6615 10Hz 1 3GHz PM 6616 Gate times 10ms 10s PM 6611 PM 6613 PM 6616 100ms 10s PM 6612 Gate times selectable in decade steps if the RF input on models PM 6613 PM 6616 is used the gate time is automatically multiplied wi
3. opti mized respectively for LF and RF signal processing The fig 1a in the introduction indicate how distortion or noise in a conventional counter can cause the signal to pass through the trigger window hysteresis band and hence give false counts The Philips PM 6610 series of counters feature continuously variable input at tenuation which reduces the input signal to an amplitude just above the value of the trigger window At the same time noise and interference are suppressed so much that they cannot span the trigger window False counts from noise interference etc are thus eliminated in these counters This optimum input matching which cannot be achieved with conventional counters having decade step attenu ators ensures that the accuracy as measured is the maximum attainable accuracy of 1 digit the time base error LF input For the low frequency input A the con _ tinuous attenuation is set manually by the sensitivity control for universal wave forms up to 80MHz For accurate LF measurements the built in low pass filter may be switched on This filter rejects HF noise or interference having ampli tudes much higher than that of the input signal under test see curve Attenuation dB Frequency MHz Fig 4 This filter characteristic showsthe attenuation of high frequency signals RF input The special RF input channel B on ea models PM 6613 PM 6616 featur
4. 1OMHz 6613 10Hz 520MHz THz 1OMHz 10Hz 1GHz TkHz 1OMHz 10Hz 1 3GHz TkHz 1OMHz PM 6614 PM 6615 PM 6616 Multiplier N 10 and 104 with correct decimal point positioning Accuracy 1 count 5 trigger error of the lower frequency N Ratio measurements with a multiplier factor N 10 10 107 and 10 PM 6611 PM 6613 PM 6616 and N 10 10 and 10 PM 6612 are obtained in the FREQUENCY mode using the external reference input as lower frequency input This arrangement however does not give correct decimai point positioning INPUT CHARACTERISTICS Input A all models Frequency range 10Hz 80MHz limited to 100kHz if internal iow pass filter is switched in Pulse resolution 6ns minimum pulse width Sensitivity 10MVams 20Hz 80MHz 30 Vams 10Hz 20Hz Impedance 1MQ 25pF Coupling AC Attenuation continuously variable between 1 x400 Trigger mode for signals having a duty factor gt 25 lt 75 T for signals having a duty factor lt 25 for signals having a duty factor gt 75 Overload voltage without damage 250Vo 220Vams up to 400Hz 12Vamg gt 1MHz Input B Not available on PM 6611 Input B serves in the PM 6612 as stop channel in time interval measurements and as lower frequency input for ratio measurements 182 In the PM 6613 PM 6616 input B is the RF input channei with automatic attenuation Time interval STOP channel
5. 1Vams open circuit Output impedance approx 200Q Coupling AC Overload protection short circuit proof GENERAL Display Read out Planar 9 digits 7 segments gas dis charge display with automatic decimal point posi tioning Display time 0 2 5s and lt Reset Pushing Reset resets the counter Releasing Reset starts new measurement Gate lamp Indicates that main gate is opened and counting takes place Memory Switchable by push button In the Count Mode the memory is switched off and the button is used for start stop operation Power requirements Line voltage 110 220V 15 45 440Hz Consumption depending on type no oscillator and options approx 15VA Mains interference below CISPR 22 3 29 2 and 40 1 or via Internal battery PM 9673 or via External DC source voltage between 11 8V and 28V consumption approx 8W Approx 100mA in STANDBY position if an oven stabilized oscillator is mounted Connector 4 mm banana crystal Environmental Temperature Storage 40 C 70 C Operating 0 C 50 C Altitude barometer pressure Storage 15000m 50 000ft 15 2kN m Operating 5000m 15 000ft 53 3kN m Humidity 10 90 RH 26 C dewpoint Vibration test According to IEC 68 Fc Bump test According to IEC 68 Eb Handling test According to IEC 68 Ec Transport test According to NLN L88 Dimensions and weight wxhxd 210 x 89 x 325mm 8 25 x 3 5 x 12 8 in 2 8kg 6 2Ib
6. B PM 6612 only Frequency range 10Hz 10MHz Pulse resolution 50ns minimum puise width Sensitivity 20MVaus Impedance 1MQ 25pF Coupling AC Attenuation x1 x20 Trigger mode for signals having a duty factor gt 25 lt 75 SL for signals having a duty factor lt 25 J for signals having a duty factor gt 75 continuously variable between Overload voltage without damage 250V pc 220Vanms uP to 400Hz 12Vams gt 1MHz RF Input B Frequency range 4 x prescaled 50MHz 520MHz PM 6614 8 x prescaled 50MHz 1000MHz PM 6615 16 x prescaled 80MHz 1300MHz PM 6616 16 x prescaled Dynamic input voltage range TOMVa ye 12Vans 27dBm 35d8m Impedance 502 Attenuation Continuous by automatic PIN diode attenuation circuit max 62d8 Coupling AC VSWR always lt 2 AM tolerance 98 at lt SkHz modulation frequency 30 at 21MHz modulation frequency Overload voltage without damage 12Vaus SMHz 250MHz PM 6613 Above 960MHz the sensitivity of the PM 6615 might drop to 24dBm 14MV pag at 1GHz For PM 6616 dynamic range is 10MVems 12Vams for frequencies 150MHz 1GHz and 20mVems 12Vems for frequencies 80MHz 1 3GHz input C Ext ref oscillator Frequency range 1kHz 10MHzR MS Sensitivity SOOMV RM Impedance approx fiko Counting AC Overload voltage without damage 50Vams OUTPUT CHARACTERISTICS Oscillator output rear X tal frequency 10MHz Amplitude approx
7. Counters and counter timers PM 6611 80MHz Universal counter PM 6612 80MHz Counter timer PM 6613 250MHz Universal counter PM 6614 520MHz Universal counter PM 6615 1GHz Universal counter PM6616 1 3GHz Universal counter lIEC 625 Wide frequency ranges from 10Hz up to SOMHz 250MHz 520MHz 1GHz and 1 3GHz Two different inputs respectively LF and RF specially designed for noise free measurements The automatic PIN diode attenuator in the RF channel gives Ease of operation Noise suppression Overload protection 178 High sensitivity of 10mV High time resolution of 100ns 9 digit planar display ensures the best resolution with overflow Good portability through battery option and compact lightweight construction Choice of 4 X tal oscillators IF display offset IEC Bus line interface BCD output and digital to analog converter output options for digital print out or analog recording of measuring data Ease of operation thanks to excellent ergonomic lay out and automated functions while the very bright planar display ensures the best readability 80MHz PM 6611 PM 6612 PM 6613 PM 6614 PM 6615 PM 6616 i Period Multiple Totalizing Time of interval Frequency 250MHz 520MHz Table 1 Performance survey of PM 6610 series of universal counters WIDE VERSATILITY AND FLEXIBILITY TO MEET YOUR PARTICULAR RE QUIREMENTS The PM 6610 series forms a family of fi
8. es an automatic multistage PIN Diode attenu ator circuit In addition to the noise suppression this gives the following user benefits 1 wide dynamic input voltage range s 2 ease of operation 2 3 high overload protection Wide input voltage range The use of PIN diode attenuators and gt other state of the art components in the RF stages ensures perfect triggering at input levels between 27dBm_ and 35dBm 10MVanys 12Vams Automatic triggering The operator need not concern himself with setting the amplitude for optimum triggering The AUTOMATIC ATTENUA TION of input signals ensures the best triggering without human intervention s RF input protection Unlike conventional AGC circuits where the gain is controlled but where the full input voltage is applied to the amplifier input the multi stage PIN Diode circuit really ATTENUATES the input signal This ensures that powerful signals are strongly reduced before they appear at the input of the sensitive amplifier The at tenuator functions as very fast RF INPUT PROTECTION up to a high 35dBm 12V signal level It is evident that an electronic overload protection reacts much faster than the older mechanical methods such as RF fuses or relays In addition the latter do not offer protection against modulated or pulsed RF since they respond to the average signal value Low level RF measurements In conventional counters too low an input signal o
9. ften causes stable and re produceabie yet fully erroneous measure ments Such measurements are elimina ted in these counters by a distinct switch off point A built in level detector permits counting only when the input signal is of sufficient amplitude gt 10mV EASE OF OPERATION Like other new instruments in the Philips range these counters have received a lot of attention from ergonomic design spe cialists to get an uncluttered front panel layout which is well human engineered The controls are placed so that operation is easily understood whilst the clear and very bright 9 digit planar display gives readouts with high last digit resolution This offers quick and full contro over your counter a convenience not offered by instruments having autoranging and less digits Easy to handle in field use Due to the high degree of integration all models have the same compact and lightweight construction For easy Operation in the field a built in type of battery unit keeps overall dimensions unchanged Display blinking is a warming that the battery charge is low To complete your measurement 10 15 minutes are left before recharging is needed The sealed lead acid batteries eliminate damage from complete discharge Re charging is possible from the line or from an external DC souce at least 18V The built in recharging circuit is fully automatic For the user this means no worries about the recharging time The
10. of operating mode In the offset mode the conversion of 500 produces a zero analog output whilst 000 gives a mid scale deflection For a display changing between 9 9999999 and 10 0000000MHz it is possible to record the frequency on the center of the strip chart rather than having the output shifting between zero and full scale Bus Interface PM 9676 The serial data output unit PM 9676 enables data processing by connecting the instrument to a standard bus line Carrying case PM 9676 To protect the whole instrument during transport or field use an ever ready case PM 9672 can be ordered as an optional extra 180 Rackmount adapters PM 9669 The counters can easily be fitted in a standard 19 rack by the use of the rack adapter PM 9669 01 or PM 9669 02 for one respectively two counters Standard accessories Operation service manual Line cord 2 Front panel protection cover MORE ACCURATE AND RELIABLE LF AND RF FREQUENCY MEASURE MENTS Whilst the basic accuracy of any counter is 1 digit the time base error it is not always realized that noise or interference can cause false counting and can lead to significant errors correct incorrect With the PM 6610 series the superior accuracy for both LF and RF measure ments is due to the improved triggering with noise and interference rejection This break through in trigger performance has been obtained by two specially de signed input and trigger channels
11. oven contained crystal oscillators with extre mely low power consumption The high stability ovenized time base options therefore can also be used with the internal battery pack No warm up times are thus needed when chang ing locations with a counter having a stability much higher than that of TCXO s temperature compensated X tal oscillator The battery capacity is suffi cient for 24 hours stand by operation This makes these counters the most suitable for portable field service use currently available Mains line voltage or battery supply Each instrument is equipped for the following alternative supply voltages Table 2 Choice of time base oscillators PM 661 version 01 version 02 version 03 version 04 version 05 version Including time base PM 9677 PM 9678 PM 9679 PM 9690 PM 9691 STABILITY against proportionally proportionally proportionally oven oven oven controlled controlled controlled e Ageing lt 5x107 lt 1x1077 per month per month lt 1x107 per month lt 15x107 per 24h lt 5x10779 per 24h Temperature 0 C 50 C lt 1x1078 lt 1x107 lt 1x107 lt 3x107 lt 5x107 ref to 25 C Change in measuring and supply mode line int battery ext DC lt 5x1078 lt 1x1078 lt 3x107 lt 3x10 9 12V 28V Line voltage 10 srao erao lt 1x107 lt Sxtone lt 5x10 18 Warm up time to lt 15min l
12. t 15min reach 1 1077 ane 179 lt 3x 1077 after 72 hours of continuous operation Line voltage 110 240Vaus 45 440Hz External battery mobile use Internal rechargable battery unit for portable use 11 8 28V _ for IF Display off set unit PM 9668 The optional circuit board PM 9668 en abies the addition or subtraction of a pro grammable value to the measured value In this way it allows the 8 most signifi cant digits to be off set This unit offers the external selection between two pre programmable off set values BCD output PM 9674 The optional circuit board PM 9674 gives BCD data in a parallel format for con nection to a standard printer such as the Philips PM 2466 Analog output PM 9675 The digital to anaiog converter PM 9675 provides a high resolution analog output for recording frequency stabilities of oscillators filters and crystals on a Y t chart recorder in frequency conyol systems having analog feed back the DAC serves aS an extremely accurate fre quency voltage converter The PM 9675 permits conversion of any three con secutive digits out of the total of 9 or the two least significant digits As such it functions as a magnifying glass to focus on just that part of the read out which is most important see fig 1 The normal mode converts 000 into a zero analog output and 999 into a full scale output The flexibility is boosted by choice
13. th the prescaling factor Accuracy T count time base error Inputs LF channel A 10Hz 80MHz all models RF channet B gt 80MHz PM 6613 PM 6616 SINGLE PERIOD ALL MODELS Range 100ns 100s Resolution 100ns Accuracy 1 count time base error trigger error Input channel A PERIOD AVERAGE ALL MODELS Range 1Hz 1O0MHz 10Hz 1O0MHz for sinewaves Periods averaged N 10 and 104 Resolution 100ns N Accuracy 1 count time base error trigger error gg S Input channel A COUNT ALL MODELS Range 1 10 Count accumulation during manua start stop interval Putse pair resolution 12ns input channe A Note In the Count Mode the memory s automatically switched off TIME INTERVAL PM 6612 ONLY Range 1us 10 s Resolution 100ns or 100ps Accuracy 1 count time base error trigger error Inputs channels A and B CHECK ALL MODELS 1OMHz clock frequency interconnected to input A Any measuring function may be selected By using this mode the COUNT function provides a stop watch facility trigger error is lt 3 107 for sinewaves with signal to noise ratio of 2 40dB trigger error for any waveshape is 2 5 10 3 lt 2 signal slope V ns bis 181 MULTIPLE RATIO Ratio fA fC 10Hz 80MHz ee TkHz tomnz PM 6611 Ratio fA fB 10Hz 80MHz 10Hz 10MHz RM6612 Ratio fA or B fC 10Hz 250MHz SS PM 661 TkHz
14. ve universal frequency counters 80MHz 250MHz 520MHz 1GHz and 1 3GHz plus one 80MHz counter timer Alt models measure a wide variety of frequency and time related parameters such as FREQUENCY PERIOD AVER AGE MULTIPLE RATIO TOTALIZING of counts SELF CHECK and TIME INTERVAL PM 6612 only They further offer a facility as stopwatch The universal counter PM 6611 and the counter time PM 6612 both ranging up to 80MHz are designed for general purpose frequency and time measure ments in research and development production testing maintenance and repair and education The universal counters PM 6613 PM 6614 PM 6615 and PM 6616 have specifically been designed for high frequency measure ments on telecommunication broad cast and TV equipment The recharge able battery unit plus the compact and lightweight construction make all these units very suitable for portable field use Choice of time base oscillator There is choice of 5 X tal oscillators see table 2 In this way the individual stability requirement can be met economically and also upgraded if necessary at a later stage By means of the external reference input use can be made of a frequency standard Instantaneous high stability time base The PM 6610 series break new ground in the area of portable counters by extending the instantaneous high stability of labora tory instruments to field applications This has been achieved by developing
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