The PM 6666 is a versatile timer/counter with many functions included as standard. The unit uses the reciprocal frequency counting technique, which yields high resolution measuring results under all conditions, even on low frequency measurements.
Measuring accuracy is increased by the high performance counter front-ends, providing variable sensitivity and noise immunity. Accuracy can be further improved with the optional high stability MTCXO time-base that offers a stability of 2 x 10 -7 (0º C to 50º C), comparable with that of an oven stabilized oscillator.
The PM 6666 offers 100% programmability including trigger level and sensitivity settings.
Features
The PM 6666 is a low-cost timer/counter with high accuracy frequency, time and voltage measurements, that also offers 100% programmable GPIB/IEEE-488 operation. All measurement functions including trigger level settings and sensitivity can be programmed. A bus learn mode is provided to speed and simplify programming.
The PM 6666 is also an excellent all-purpose instrument for bench-top use, with nine front panel selectable measuring functions including voltage max/min measurements.
Error-free triggering
Triggering is error-free on the PM 6666 for all waveforms. Trigger-level setting can be automatic on all input signals over 100 Hz. Resolution is 20/200 mV, over a very wide range (-50V to +50V) that allows measurements to be accurate even on high voltage events. The trigger level can be displayed immediately with one key stroke; and inputs can be instantly checked for triggering with the tri-state LED trigger indicators.
To give the various noise immunity settings, input sensitivity has six steps, from 20 mV to 1V rms.
Peak voltage measurements to 50 MHz
The PM 6666 has volt peak measurements up to 50 MHz. When displaying Vmax/min measurements, positive and negative signal peaks of the input signal are shown simultaneously with a resolution of 20 or 200 mV.
High resolution
The PM 6666 can measure low frequency signals to high resolution with synchronized multiple period measurements and computing the reciprocal values.
Resolution is at least 7 digits on a 1s measuring time, because the traditional ±1 input cycle is eliminated. Time interval measurements are high resolution as well as high accuracy, due to the time interval averaging technique. The 100 ns resolution is improved by a factor divided by N (N = number of time intervals averaged) when compared with single time interval measurements.
