TM 11-6625-1559-12
OPERATING INSTRUCTIONS
Note. This chapter covers only items used by the operator ; items used by higher maintenance category personnel are
covered in instructions for the appropriate maintenance category.
3-1. Generator, Signal Sweep SG593/U Operating Controls and Indicators
Function
Control or indicator
V O L T S meter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Three-scale voltmeter which provides the following
readings:
Reading
Scale
UHF ----------------------- Indicates output voltage for
uhf ranges. Calibrated
from 0.5 to 2 volts in 0.5-
Volt steps.
VHF --------------------- Indicates output voltage for
vhf ranges. Calibrated
from 0 to 0.35 volt in
0.1-volt steps.
DBM ---------------------- Calibrated from -10 to +4
dbm in 1-dbm steps. Read
directly for vhf. Add 15
dbm for uhf.
PULL TURN FOR ZERO switch/control ------------------ In position is normal operating position. Out position
permits adjusting electrical zero of VOLTS meter.
Four-scale dial which indicates the center frequency of
FREQUENCY MEGAHERTZ dial ------------------------
the frequency range being swept. The scale in use is
indicated by illuminated arrows at each side of the
dial. Scales are calibrated as follows:
Range
Scale
Top ------------------------- Uhf narrow: 350 to 1,200
MHz in 10-MHz steps.
Second --------------------- Uhf wide: 275 to 1,100 MHz
in 10-MHz steps.
Third -------------------- Vhf wide: 0 to 460 MHz in
10-MHZ steps.
Bottom -------------------- Vhf narrow: 0 to 450 MHz
in 10-MHz steps.
FREQUENCY MEGAHERTZ knob ----------------------Rotates FREQUENCY MEGAHERTZ dial to desired
position. Divides 10 MHz steps on dial into 2-MHz
increments.
FINE TUNING control -------------------------------- Provides small increment frequency adjustment.
ATTENUATOR db switch ------------------------------ Attenuates sweep generator output in 10-db steps from
0 to 50 db.
BAND SELECTOR switch ------------------------------- VHF position selects vhf range of center frequencies.
UHF position selects uhf range of center frequencies.
RF OUTPUT control ------------------------------------ Varies sweep generator output amplitude at RF OUTPUT
jack.