GLOSSARY OF TERMS (Cont)

STP Station Test Program TTU Timing Terminal Unit
TCUTiming Control Unit TTY Teletype
TDDTime Display Distributor TWT Traveling Wave Tube
TDLTTracking Data Link Terminal UHF Ulta High Frquency
TDP-II Telemetry Data Processor VCO Voltage Controlled Oscillator
TDU Time Display Unit VHF Very High Frequency
TLM Telemetry VPG Verification Pulse Generator
TM Technical Manual VSWR Voltage Standing Wave Ratio
TOR Technical Operating Report VTCW Vehicle Time Code Word
TSRE Terminal Sending and Receiving Equipment WDL Western Devolopment Laboratories
TT&C Tracking Telemetry and Commanding WPM Words Per Minute

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