Fluke PM6681/656 - 300 MHz, 50 ps Timer/Counter

Every measuring function you need

No matter what measurement function you need for totalizing, frequency or time-related measurements, you"ll find it in the PM 6681 timer/counter. The counter gives you no less than 8 totalize modes, including simultaneous up/down counting and totalizing over a preset time. It also gives you a 4 digit 120 MHz peak reading voltmeter plus phase, duty factor, Vmax./Vmin., pulsewidth and rise/fall time.

Frequency range

The PM 6681 timer/counter spans a frequency range of up to 8 GHz, which enables calibration of microwave links, communications and radar equipment. You can make frequency measurements accurately and easily, not only on continuous carrier waves, but also on burst signals.

Resolution

With the high resolution/speed performance of 11 digits/s, these counters are ideal tools for frequency measurements on telecom systems. Time interval measurements down to 1ps average and 50 ps single shot are supported

Time base options

Time base options include TCXO, High Stability Oven, Very High Stability Oven and Rubidium, giving time base stability of better than 5 x 10-11 per month.

Measuring functions

Frequency, Frequency Burst, Period, Ratio, Time Interval, Pulse Width A, Rise and Fall Time A, Phase A-B, Duty Factor A, Totalize A,B and AC/DC Voltage.

Auxiliary functions

Trigger Hold-Off, External Arming, Statistics (Max, Min, Mean & Std Deviation) and Mathematics.

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PM 6681 High Performance Timer/Counter

Measurement Functions Optional TimeBase Input and Output Specifications Optional Pre-Scalers Rear Panel Inputs And Outputs Auxiliary Functions Other Functions General Specifications Measurement Functions Measurement Functions   Time Interval, Pulse Width, Rise/Fall Time, Frequency, Burst Frequency, Period, Ratio f1/f2, Phase, Duty Factor, Totalize Frequency Input A: 10 -10 Hz to 300 MHz Input B: 10 -10 Hz to 100 MHz Input C: Optional Input Pre-Scaler   (PM9624): 100 MHz to 2.7 GHz   (PM9638): 300 MHz to 8 GHz Resolution: 11 digits/s measurement time Burst Frequency Input A,B,C Frequency Range Input A: Up to 300 MHz Frequency Range Input B: Up to 100 MHz Frequency Range Input C: Up to 8.0 GHz with options Start Delay Range: 200 ns to 1s, 100 ns resolution Period A Range: 3.3 ns to 10 10 s Resolution: 11 digits/s measurement time Ratio A/B, C/B Range: 10 -9 to 10 15 Frequency Range: Input A,B: 10 -10 Hz to 160 MHz   Input C: See input C frequency range. Time Interval A to B Range: 0 ns to 10 10 s Resolution: single shot 50 ps (1 ps average) Frequency Range: Up to 160 MHz Pulse Width A Range: 3 ns to 10 10 s Frequency Range: Up to 160 MHz Rise and Fall Time Range: 3 ns to 10 10 s Frequency Range: Up to 160 MHz Input Amplitude: 250 mV p-p Phase A Relative B Range: -180º to +360º Resolution: 0.01º Frequency Range: 0.03 Hz to 160 MHz Duty Factor A Range: 0 to 1 Frequency Range: 0.11 Hz to 160 MHz Totalize A,B Range: 0 to 10 17 , 0 to 10 10 in A-B modes Frequency Range: 0 to 160 MHz A Gated by B: Event counting on input A during the presence of a pulse on input B. Single or cumulative event counting during set measuring time. A start/stop by B: Event counting on input A between two consecutive pulses on B. Manual A-B: Input A minus input B event counting with manual start/stop. Manual/Timed A-B: Input A minus input B event counting with manual start/stop. Stop after set measuring time. Time counted from first trigger event on A. AC/DC Voltage A,B Range: -50V to +50 V Frequency Range: DC, 1 Hz to 100 MHz Mode: V max, V min, V p-p Resolution: 1.25 mV Gated Volt: External masking of unwanted signal components such as overshoot Optional TimeBase Standard: PM6681/-1- (Non-Retrofit) Calibration adjustment tolerance*** at +23ºC ± 3ºC: < 1 x 10 -6 Uncertainty due to:   Aging /24 hr: N/A* Aging /month: < 5 x 10 -7 Aging /year: < 5 x 10 -6 Temperature Stability (reference temp at +23ºC): 0-50ºC: < 1 x 10 -5   20ºC -26ºC: £ 3 x 10 -6 Line Voltage variation of ±10%: < 1 x 10 -8 Power On Stability: Not Specified Total Uncertainty**** at 2 s (95%) confidence interval and at 23ºC ± 3ºC: After 1 Year Cal interval < 7 x 10 -6   After 2 Year Cal interval < 1.2 x 10 -5 Total Uncertainty**** at 2 s (95%) confidence interval and at 0-50ºC: After 1 Year Cal interval < 1.2 x 10 -5   After 2 Year Cal interval < 1.5 x 10 -5 OCXO: PM6681/-5- (PM9691) Calibration adjustment tolerance*** at +23ºC ± 3ºC: < 2 x 10 -8 Uncertainty due to:   Aging /24 hr: < 5 x 10 -10 ** Aging /month: < 1 x 10 -8 Aging /year: < 7.5 x 10 -8 Temperature Stability (reference temp at +23ºC): 0-50ºC: < 5 x 10 -9   20ºC -26ºC < 6 x 10 -10 (typical values) Line Voltage variation of ±10%: < 5 x 10 -10 Power-on stability: 1 x 10 -7 Deviation versus final value after 24 hr on time, after a warm-up time of: 15 min Total Uncertainty**** at 2 s (95%) confidence interval and at 23ºC ± 3ºC: After 1 Year Cal interval: < 9 x 10 -8   After 2 Year Cal interval: < 1.5 x 10 -7 Total Uncertainty**** at 2 s (95%) confidence interval and at 0-50ºC: After 1 Year Cal interval: < 1 x 10 -8   After 2 Year Cal interval: < 2 x 10 -7 OCXO: PM6681/-6- (PM9692) Calibration adjustment tolerance*** at +23ºC ± 3ºC: < 5 x 10 -9 Uncertainty due to:   Aging /24 hr: < 3 x 10 -10 ** Aging /month: < 3 x 10 -9 Aging /year: < 2 x 10 -8 Temperature Stability (reference temp at +23ºC): 0-50ºC: < 2.5 x 10 -9   20ºC -26ºC < 4 x 10 -10 (typical values) Line Voltage variation of ±10%: < 5 x 10 -10 Short term stability: (root Allan Variance)   T = 1 s: 1 x 10 -11   T = 10 s: 3 x 10 -12   T = 100 s: 1 x 10 -12 Power-on stability: 5 x 10 -9 Deviation versus final value after 24 hr on time, after a warm-up time of: 10 min Total Uncertainty**** at 2 s (95%) confidence interval and at 23ºC ± 3ºC: After 1 Year Cal interval: < 2.5 x 10 -8   After 2 Year Cal interval: < 5 x 10 -8 Total Uncertainty**** at 2 s (95%) confidence interval and at 0-50ºC: After 1 Year Cal interval: < 2.5 x 10 -8   After 2 Year Cal interval: < 5 x 10 -8 *N/A: Not discernible, neglectable versus 1°C temperature variation. **After 48 hours continuous operation ***Calibration Adjustment Tolerance: Is the maximal tolerated deviation from the true 10MHz frequency after a calibration. When the reference frequency does not exceed the tolerance limits at the moment of calibration, an adjustment is not needed. ****Total uncertainty: Is the total possible deviation from the true 10MHz value under influence of frequency drift due to aging and ambient temperature variations versus the reference temperature. The operating temperature range and the calibration interval are part of this specification. Input and Output Specifications Input A & B Frequency Range:   AC coupled: 10 Hz to 300 MHz DC coupled: DC to 300 MHz Coupling: AC or DC Rise time: Approximately 1.1 ns Impedance: 1 MΩ //15 pF or 50Ω , VSWR < 2:1; 1 MΩ//65 pF or 50Ω with PM 9611/80 rear panel inputs Trigger Slope: Positive or negative Channel Inputs: Separate, Common A or Swapped Max. channel timing difference: 500 ps Sensitivity (SineWave): 20 mV, up to 100 MHz   25 mV, 100 MHz to 200 MHz   40 mV, 200 MHz to 250 MHz   60 mV, > 250 MHz Pulse Width: 5 ns at 60 mV p-p, > 3 ns at 90 mV p-p Attenuation: X1 or X10 Hysteresis Window (x1): 20 mV p-p Variable Hysteresis A (x1): 30 mV p-p to 10 V p-p up to 120 MHz Dynamic Range: 60 mV p-p to 10 V p-p (up to 100 MHz) within ± 5V window   75 mV p-p to 10 V p-p (100 to 200 MHz) within ± 5V window Trigger Trigger Level: Read out on display Range: (x1): -5V to + 5V   (x10): -50V to + 50V Resolution: (X1): 1.25 mV Uncertainty: (x1): ±(4 mV + 0.8% of trigger level) Auto Trigger Level   Trigger level is automatically set to 50% of input signal. Frequency: 1Hz Low Pass Filter A   100 kHz fixed. > 40 dB attenuation at 1 MHz Digital Low Pass Filter   1 Hz to 5 MHz using trigger hold off Trigger Indicator   Tri-State LED indicator Trigger Slope   Positive or Negative Damage Level 1 M W Impedance: 350V (DC + AC peak) at DC to 440 Hz, falling to 12 Vrms (x1) and 120 V rms (x10) at 1 MHz 50 W Impedance: 12V rms Optional Pre-Scalers Input C (PM 9624) Frequency Range: 100 MHz to 2.7 GHz Pre-Scaler Factor: 32 Sensitivity: 20 mV rms to 12V rms, 100 to 300 MHz   10 mV rms to 12V rms, 0.3 GHz to 2.5 GHz   20 mV rms to 12V rms, 2.5 GHz to 2.7 GHz Amplitude Modulation: DC to 0.1 MHz: Up to 94% depth   0.1 to 6 MHz: Up to 85% depth   Minimum signal must exceed Input Sensitivity Threshold Impedance: 50Ω nominal, AC coupled, VSWR < 2:1 Max. Voltage without Damage: 12V rms pin diode protected Connector: Type N Female Input C (PM9638) Frequency Range: 300 MHz to 8 GHz Pre Scalar Factor: 256 Operating Input Voltage Range: 300...500 MHz: -21...+30 dBm   0.5...3.0 GHz: -27...+30 dBm   3.0...4.5 GHz: -21...+30 dBm   4.5...6.0 GHZ: -15...+30 dBm   6.0...8.0 GHz: -9...+30 dBm Impedance: 50Ω nominal, AC coupled, VSWR < 2:1 Max input voltage without damage: 7V RMS, pin diode protected Damage Connector Type N female Rear Panel Inputs And Outputs External Reference Input D Range: 1,2,5 or 10 MHz, > 200 mV signal. Arming Input E   Most measurement functions can be performed via arming input. Range: DC to 100 MHz Slew Rate: 2V/µs Trigger Level: TTL, 1.4V nominal Trigger Slope: Positive or Negative Damage Level: 25V peak Reference Output G Frequency: 10 MHz, Sine Wave Output: 0.5 V rms into 50Ω load, > 0.7 V rms into hi impedance load. AC coupled Gate Open Output H Ouput Level: Closed: < 0.4 V   Open: > 1.4 V into 50Ω Internal Delay: 20 ns Trigger Level Outputs Output Level: Trigger Level/Attn Setting Impedance: 100Ω Probe Compensation Output   Buffered outputs for input A & B signals. Best used for adjustment of probes to best pulse response for the combination of probe and counter input. Analog output   0 to 4.98 V in 20 mV steps, derived from three consecutive digits selected from the measurement result. Auxiliary Functions Trigger Hold-Off Time Delay Range: 60 ns to 1.34s, 10 ns resolution Event Delay Range B: 2 to 2 24 -1, max. 100 MHz External Arming Buďte prvý, kto napíše príspevok k tejto položke. Pridať komentár Nevypĺňajte toto pole: Vložením komentáre súhlasíte s podmienkami ochrany osobných údajov Tento web používa súbory cookie. Ďalším prechádzaním tohto webu vyjadrujete súhlas s ich používaním. Viac informácií tu. Nastavenie Súhlasím