TM 32-6625-022-24&P
WARNING
4-12 REGULATED +30 VOLTS SUPPLY.
a. Using multimeter, monitor regulated +30 Vdc at
Always secure the connector cap onto the
TP 3.
front panel power connector before applying
b. Adjust R12 to obtain an indication of +30 0.6 Vdc.
115 Vac to the alternate power connector
c. Using oscilloscope, observe ac ripple voltage at TP 3.
located at the rear of the generator assembly.
The ripple voltage must not exceed 6 mV.
WARNING
4-13 REGULATED -30 VOLTS SUPPLY.
a. Using multimeter, monitor regulated -30 Vdc at
Dangerous potentials up to 200 Vdc are pre-
TP 7.
sent at exposed terminals and wiring within
b. Adjust R18 to obtain an indication of -30 0.6
the sweep generator chassis. Exercise extreme
Vdc.
caution when working inside this chassis.
TP 7. The ripple voltage must not exceed 4 mV.
adjustment as follows:
4-14 REGULATED +200 VOLTS SUPPLY.
a. Obtain the required test equipment as listed in
TP1l.
b. Set the POWER switch to the OFF position and dis-
b. Adjust R24 to obtain an indication of +200 4 Vdc.
connect the power cord from the front panel power
connect or.
TP 11. The ripple voltage must not exceed 6 mV.
c. Secure connector cap onto front panel power
connector.
4-15 UNREGULATED +50 VOLTS.
cabinet.
e. Loosen twelve (12) quarter-turn fasteners on top
TP 12. The voltage must be from +45 to +62 Vdc.
and bottom dust covers; remove covers from the gen-
erator assembly.
The ripple voltage must not exceed 500 mV.
4-16 SWEEP RATE CIRCUIT.
VHF
RANGE
RF ATTENUATOR
0 DB
a. Set SWEEP RATE control to MAN position.
EXT MARKER SIZE
MID RANGE
b. Using VTVM, monitor voltage. It should be approx-
SWEEP WIDTH
WIDE
mately +20 Vdc at front panel SCOPE HORIZ connector.
CW
SWEEP WIDTH ADJUST
c. Rotate SWEEP RATE ADJUST control CCW; then
200 MHZ
CW. The voltage must vary from O CCW to 18 CW +1.8 Vdc
INT MARKER
OFF (All)
at either extreme.
MID RANGE
INT MARKER SIZE
d. Connect coaxial cable from SCOPE HORIZ con-
SWEEP RATE
VAR
nector to oscilloscope EXT HORIZ INPUT connector.
SWEEP RATE ADJUST
CW
e. Adjust oscilloscope controls so that the beam is a
dot centered on the extreme left vertical graticule line
g. Connect power cord to power connector located at
when SWEEP RATE ADJUST control is CCW and cen-
rear of generator assembly and to a 115 Vac, single phase,
tered on the extreme right vertical graticule line when
60 Hz source.
SWEEP RATE ADJUST control is CW.
h. Set POWER switch to the ON position and allow the
sweep generator to warm up for twenty minutes.
NOTE
PROCEDURE. Procedures
4-11 ADJUSTMENT
for
The oscilloscope is now adjusted to serve as a
adjusting the sweep generator are in paragraphs 4-12
reference. Do not readjust its controls during
through 4-19.
adjustment of the rate circuit.
