TM 11-6660-266-13
Abbreviation
Definition
Meteorological Measuring Set, AN/TMQ-38
MMS
Navigational AM
NAVAID
National Stock Number
NSN
Preventive Maintenance Checks and Services
PMCS
Power Supply Unit
PSU
Air Pressure, Temperature, and Humidity
PTU
Radio Direction Finding
RDF
Source, Maintenance, and Recoverability
SMR
Shop Replaceable Unit
SRU
Signal Strength
SSTR
System Generation
SYSGEN
Test, Measurment, and Diagnostic Equipment
TMDE
Ultra High Frequency
UHF
Very Low Frequency
VLF
1-7-3. Glossary.
Term
Definition
Mixing of two signals to obtain a sum and a difference signal
Heterodyne
Will not absorb moisture
Non-hygroscopic
1-3
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