Model: 540B

Electronic Frequency Converter

Properties:

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
Part Number
540B
Description
Converter,frequency,electronic
CAGE
1LQK8

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.

Part 540B NSN 6625-00-080-7204

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00329
FIIG:
A32200
Concept No.:
App. Key:
D
Cond. Code:
2
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
A
ESD:
ESD:
MMAC:
RH
CRITL:
X

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:
M
SPI No.:
F000004XE9
SPI Rev.:
SPC Mkg:
00
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:
2
SHC:
Q
ACC:
Equipment for Aircraft

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Schedule B and Export
  • Schedule B: 9030908030
  • SITC: 87479
  • End Use: Measuring, testing, control instruments
  • NAICS: 334515
  • USDA: 1

Freight Class: Parts and accessories of articles of schedule b subheading 9030.39

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