| MEASUREMENT TYPE | FREQUENCY |
| FREQUENCY RANGE | 0.000 TO 500.000 MEGAHERTZ OVERALL |
| ACCURACY RATING | STABLE TO 3 PARTS IN 10E-9/DAY |
| INTERNAL CALIBRATION FEATURE | INCLUDED |
| DISPLAY TYPE | LIGHT EMITTING DIODE (L.E.D.). |
| DISPLAY DIGIT QUANTITY | 9 |
| DISPLAY UNITS INDICATOR | INCLUDED |
| DISPLAY POSITIONED DECIMAL POINT | PROVIDED |
| DISPLAY STORAGE FACILITY | NOT INCLUDED |
| REMOTE CONTROL PROVISIONS | NOT INCLUDED |
| SOLID STATE FEATURE | INCLUDED |
| ELECTRICAL CONNECTION QUANTITY | 9 |
| CURRENT TYPE | AC |
| VOLTAGE RATING | 115.0 VOLTS NOMINAL OR |
| 230.0 VOLTS NOMINAL |
| FREQUENCY RATING | 50.0 HERTZ MINIMUM AND |
| 400.0 HERTZ MAXIMUM |
| PHASE | SINGLE |
| WATTAGE RATING IN WATTS | 50.0 |
| INTERNAL BATTERY ACCOMMODATION | NOT INCLUDED |
| INCLOSURE MATERIAL AND LOCATION | METAL BODY |
| OVERALL LENGTH | 19.000 INCHES NOMINAL |
| OVERALL WIDTH | 19.000 INCHES NOMINAL |
| OVERALL HEIGHT | 6.000 INCHES NOMINAL |
| MOUNTING METHOD | BENCH |
| PLUG-IN UNITS PROVISION | NOT INCLUDED |
| STANDARD FREQUENCY OUTPUT FEATURE | INCLUDED |
| OUTPUT FREQUENCY RATING | 1.0 MEGAHERTZ MINIMUM AND |
| 10.0 MEGAHERTZ MAXIMUM |
| JOINT ELECTRONICS TYPE DESIGNATION SYSTEM ITEM NAME | COUNTER,ELECTRONIC DIGITAL READOUT |
| JOINT ELECTRONICS TYPE DESIGNATION SYSTEM ITEM TYPE NUMBER | AN/USM-326A |
| TEST DATA DOCUMENT | 81349-MIL-T-21200 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). AND |
| 81349-MIL-T-28800 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| SPECIAL TEST FEATURES | MIL-T-21200 CLASS 2; MIL-T-28800 TYPE 1, CLASS 2 |
| UNPACKAGED UNIT WEIGHT | 40.000 POUNDS |
| FUNCTIONAL CLASSIFICATION | AA-6.3 |
| FUNCTIONAL DESCRIPTION | 2 CHANNEL ENVIRONMENTALIZED COUNTER/TIMER. ELEVEN OPERATING MODES INCLUDING FREQUENCY BURST MEASUREMENTS. DIRECT COUNTING TO 110MHZ PRESCALED TO 550MHZ. TIMING MEASUREMENTS 100NANOSEC TO 10E9 SEC |
| REFERENCE DATA AND LITERATURE | TO 33A1-5-435-4 |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 50423 |
| DESIGN CONTROL REFERENCE | 9648M |