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                                    The PM 6673 .. .76 series of universal frequency
counters offers automatic time and frequency measurements
under microcomputer control.
For application in measuring systems, provision is
made by an interface option for full IEC-625/IEEE-488
bus programmability. Other data interface options,
like BCD and analog output, are also available.
An internal rechargeable battery unit is available
to enable the counter to be used in field applications.
Measuring Modes

Frequency Range:

Sine: 10Hz ... 120 MHz (PM 6673)
      10Hz ... 550MHz (PM 6674)
      10Hz ... 600 MHz (PM 6675)
      10Hz ... 15GHz (PM 6676)

      Pulse-Minimum frequency down to 0.1 Hz.

Contents
1.	Technical specification....	...4
2.	Installation instructions...	. 7
3.	Operating instructions.....	...8
	Front panel controls...........	8
	Rear panel controls............	9
        Theory of measurements.. 10
        Practical measurements.... 14