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D e scription
The SG 504 provides a constant-am plitude si ne wave
over a frequency range from 245 MHz to 1 050 MHz.
Amplitude-reference sine waves of .05 M Hz or 6.0 MHz
(selected by internal switch) are provided. The output
head has an output impedance of 50 ohms. The peak-to
peak voltage from the output head is adj usted by a
calibrated five-turn potentiometer. The SG 504 Leveled
Sine Wave Generator is desig ned for use in the TM 500
series power modu l es.
The front-panel FREQUENCY M O N I TO R OUT con
nector provides at least a 0.3 V peak-to-peak signal at the
selected output frequency (245 to 1 050 M Hz) for monitor
ing or external t riggering. There is also a provision for
frequency modulating t he 245 to 1 050 M Hz output signal.
When lit, the U N LEVELED light indicates a mismatched
load or when the OUTPUT AMPLI TUDE front-panel
control should be turned counterclockwise. When the
output head is d isconnected from the front panel, the
U N LEVELED light is also i l l um inated.
Rear i nterface connections are provided for the FM
I N PUT, FREQUENCY M O N I TOR OUT, and amplitude
control . If the rear interface is used, these front panel
features must be disconnected. They cannot both be used
at once. For further information about the interface
assignments, see Section 4, Maintenance and I nterfacing
I nformation, of this manual.
I nstallation and Re moval
Turn the power module off before inserting the plug
in and before connecting the output head to the
SG 504 front-pane/ connectors; otherwise, damage
may occur to the plug-in circuitry.
recommended that the power module be turned off
before removing the SG 504. Refer to Fig. 1 - 1 . If it
becomes necessary to install the output head cables
after the instrument has been turned on, make sure
the four-pin connector is inserted first. Then, con
nect the bnc coaxial connector. Check to see that
the plastic barriers on the interconnecting jack of the
selected power module compartment match the cut
outs in the SG 504 circuit board edge connector.
REV 8,
AUG 1978
http://manoman.sqhill.com
OPERATING INSTRUCTIONS
�
It is also
Align the SG 504 chassis with the u pper and lower
gui des of the selected com partment. Push the module in
and press firmly to seat the circuit board in the inter
connecting jack.
To rem ove the SG 504, pull on the release latch located
in the l ower left corner, until the interconnecting jack
disengages and the SG 504 wi l l slide out.
Controls and Conn e ctors
Refer to Fig. 1 -2. Even though the SG 504 is f u l l y
cal i brated and ready t o u se, the functions and actions of
the controls and connectors should be reviewed before
attem pting to use the instrument. Pull the Power switch on
the power mod u l e to apply power to the SG 504. The
POWER indicator light indicates when power is appl ied to
the SG 504.
Except for very early models of the SG 504, the f ront
panel bears the inscri ption:
A
This symbol is to direct the operator to read the operating
instructions to avoid a hazardous situation.
When using the crank on the FREQUENCY MHz dial,
observe the stop notations on the dial tape. To
prevent possible internal damage or miscalibration,
do not force the knob hard against the mechanical
stops.
OPERATING CONSI DERAT IONS
Ov e r he ating
The SG 504 is designed to operate at an ambient
tem perature from 0°c to +50°C.
operating several power supplies in a m ulti-pl ug-in power
module,
especially at high
operating close to other heat-prod ucing equipment, inter
nal tem perature may exceed safe l i mits and actuate a
thermal cutout in t he power mod ule. Refer to the power
module i n struction manual for m ore complete informa
tion.
Section 1 -SG 504
However.
when
line voltages. or when
1-1
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