CM77AUSM

Electronic Frequency Converter

NSN 6625-00-080-7204

DEMIL

Shelf Life

UOM

NIIN

Demil:

DEMIL/MLI

Shelf Life:

N/A

UOM:

1 EA

NIIN:

000807204

Detail Specifications

Overall Length:

20.750 inches

Overall Height:

12.500 inches

Overall Width:

15.250 inches

Average Life Measurement:

Not rated

Basic Shape Style:

Rectangular or square

Identification Designator:

540b-28480

Inclosure Type:

Encased

Installation Design:

Top of cabinet/counter

Circuit Construction Type:

Electron tube

Frequency Per Channel:

10.0 megahertz operating channel

Frequency Per Channel:

12.4 gigahertz operating channel

Operating Ac Frequency In Hertz:

1000.0 single voltage

Operating Ac Frequency In Hertz:

50.0 single voltage

External Ac Operating Voltage In Volts:

115.0 single voltage

External Ac Operating Voltage In Volts:

230.0 single voltage

Phase:

Single

Functional Classification:

Aa-6.3

Functional Description:

Extends frequency measurement range of an/usm-26 & an/usm-207a into microwave range; along w/ an/usm-26 or -207a can measure frequencies up to 12.4 ghz, or w/ an external mixer 1-18 ghz; can be used w/out a frequency counter to measure frequencies below 4 ghz w/in about porm 0.5 pct; frequency is determined by zero-beating the unknown signal w/ a harmonic of an extremely stable signal generated w/in & to measure cm-77a fundamental frequency on a counter; multiplying counter readout by harmonic causing the zero-beat gives input frequency; harmonic no. Is determined from previous knowledge of input frequency or by computation; zer/-beat is displayed on internal oscilloscope

Entry Date:

70-12-01

Reference Data And Literature:

Dept of army publications: tb9-6625-336-50, 19 nov 64; tm11-6625-493-15 w/ changes 1 & 2, 29 sep 64; tm 11-6625-493-20p; tm11-6625-493-45p, 19 oct 64

Relationship To Similar Equipment:

Interchangeable w/ 6625009739267 & 6625007355167; similar to cm-77/usm

Type/model Designation:

Cm-77a/usm

NSN:

6625-00-080-7204

Item Name:

Downconverter

Cage Code:

80058

Manufacturer Part Numbers

Part Number

Cage

RNCC

RNVC

RNAAC

Status

MSDS

SADC

Part Number:

540B

Cage Code:

1LQK8

RNCC:

RNVC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

CM77AUSM

Cage Code:

80050

RNCC:

RNVC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

540B

Cage Code:

28480

RNCC:

RNVC:

RNAAC:

Status:

MSDS:

SADC:

Part Identification

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

00329

FIIG:

A32200

Concept No.:

App. Key:

Cond. Code:

Status:

Part Materials

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

36.5 X 26.5 X 19.0

Paclk Weight:

72.9000lbs

Item Weight:

0.0000lbs

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

F000004XE9

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

061700

UFC:

34580

LTL:

RATING VARIABLE

LCL:

WCC:

653

TCC:

SHC:

ACC:

Equipment for Aircraft

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Pricing & Availability

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Definition Definition of approved item name (AIN): "Downconverter"

An electronic device having frequency mixing circuits and an integral oscillator which mixes the incoming frequency(ies) with the oscillator frequency, the resultant frequency(ies) being a combination of the two sources. Includes equipment that performs these functions at either radio or power line frequencies. Excludes items that change frequency by means of rotating equipment or rectifier and switching or keying circuitry.