Equipment information

Tracor 895A Frequency counter
Manufacturer:
Tracor
Model: 895A
Date: 1981
Category: Measurement instruments
Group: Frequency counter
Description: Linear Phase Time Comparator
Information:

The Tracor Model 895 Linear Phase/Time Comparator (figures 1-1 and 1-2) is designed to measure the relative phase or time difference between two signals. Because of its resolution and wide range, this instrument can be used for a variety of time and frequency measurements. In its two modes of operation, the Model 895A provides a front panel meter readout of the time difference between the two input signals on full-scale ranges of 0.1, 1.0 or 10 microseconds, or the phase difference between the two input signals on full-scale ranges of 1.0, 10 or 100 cycles. By virtue of its extreme resolution (1 nansecond in the microsecond mode at 0.1 microsecond full scale), the Tracor Model 895A facilitates rapid, accurate adjustment of high quality frequency standards. When twenty-four hour averaging is employed, resolution of the Model 895A is adequate to allow comparison of atomic Frequency Standard signals with a resolution of approximately one part in 10¹⁴. Front or back panel Record Outputs may be used for evaluating precision Oscillator performance, or as a continuous check of time difference between a clock system and a standard time source. A front panel MONITOR connector provides phase or time difference outputs suitable for display on an Oscilloscope. This allows magnification of the Model 895A output and makes possible very rapid adjustments of oscillators.

These manuals are available for the above equipment:

Manual Type: Service and User Manual Tracor-12201-Manual-Page-1-Picture
Pages: 87
Size: 12.58 Mbytes (13191413 Bytes)
Language: english
Revision: D
Manual-ID/Number: 6913F
Date: 01 March 1981
Quality: Scanned document, reading partly badly, partly not readable.
Upload date:
MD5: b77b6c439c7c0bd9cbec7932e8c25c85
Downloads: 4 since 05 October 2019
Information:

Page I INTRODUCTION II SPECIFICATIONS 2-1 Electrical ... 2-1 2-2 Mechanical ... 2-2 III INSTALLATION 3-1 Installation Procedures ... „..3-l .IV OPERATION 4-9 Operating Procedure ... 4-3 4-12 Choice of full scale range ... 4-3 4-19 Sample Problem ... 4-6 V CIRCUIT DESCRIPTION 5-1 General ... 5-1 5-9 Component Description, „ ... 5-4 5-10 Power Supplies (Interconnecting Diagram 6809) .. ... „ ... .5-4 5-13 Input Clipper, PCB Assembly 6807, Schematic 6005 ... 5-5 5-15 Schmitt Triggers, PCB Assembly 6807 ... 5-5 5-17 Decade Divider, PCB Assembly 6791, Schematic 6808» ... » ... e ... 5-5 5-21 Set-Reset Flip Flop, PCB Assembly 6807 ... 5-6 5-23 Local Oscillator, PCB Assembly 6806, Schematic 6004. ... o ... ... 5-6 5-25 Frequency Converter, PCB Assembly 6806 ... 5-6 Section Page VI MAINTENANCE 6-2 Removal of Cover 6-4 Normal Waveforms 6-6 Waveforms ... 6-8 Paper Loading Instructions ... 6-4 VII REPLACEABLE PARTS 7-1 Scope of Section ... 7-1 7-3 Item/Reference Designation ... 7-1 7-5 Item Number ... 7-1 7-7 Reference Designation ... 7-1 7-9 TRACOR Stock Number ... 7-2 7-11 Part Description ... .7-2 7-13 Assembly Stock Number. ... 7-2 7-15 Use of Item/Reference Designation Index ... 7-2 7-18 Replaceable Parts ... 7-3 7-21 List of Federal Supply Codes for Manufacturers ... «, ... 7-4 7-24 Ordering Information ... ... . .. .7-5 VIII SCHEMATIC DIAGRAMS AND ASSEMBLY DRAWINGS 8-1 Scope of Section ... 8-1 8-3 Diagrams and Drawings ... 8-1

Tracor-12201-Manual-Page-1-Picture


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