TM 11-6625-2781-14&P-2
Section II
SECTION II
INSTALLATION
2-1. SHIPPING INFORMATION
2-13. Preliminary Power Settings
2-2. Since the RF and IF Sections are received
2-14. The 115/230 power selector switch at rear of
separately, the plug-ins must be mechanically fitted
display section must be set to agree with the available
together, electrically connected, and inserted in an
line voltage that is, if the line voltage is 115 volts, the
oscilloscope mainframe of the 140-series.
For
slide switch must be positioned so that 115 is clearly
mechanical and electrical connections, refer to Figure
visible. (The instrument is internally fused for 115-volt
operation; if 230-volt power is used, refer to fuse
replacement procedures in the display section manual.)
2-3. INITIAL INSPECTION
2-15. Power Cable
2-4. Mechanical Check
2-16. To protect operating personnel, the National
Electrical
Manufacturers'
Association
(NEMA)
2-5. If shipping carton is damaged, ask that agent of
recommends that instrument panel and cabinet be
carrier be present when instrument is unpacked. Inspect
grounded. The analyzer is equipped with a three
instrument for mechanical damage such as scratches,
conductor power cable; the third conductor is the ground
dents, broken knobs, or other defects. Also, check
conductor and, when the cable is plugged into an
cushioning material for signs of severe stress.
appropriate receptacle, the instrument is grounded. To
preserve the protection feature when operating the
2-6. Performance Checkout
instrument from a two-contact-outlet, use a three-prong
to two-prong adapter and connect the green lead on the
2-7. As soon as possible after receipt, the instrument
adapter to ground.
should be performance-tested in accordance with the
Performance Test, Section IV.
2-17. CONNECTIONS
2-8. DELETED.
2-18. Since the RF and IF Sections are shipped
separately, the plug-ins must be mechanically fitted
together, electrically connected, and then inserted into
the display section mainframe.
To make these
connections, refer to Figure 2-1 and proceed as follows:
a. Set the IF section on a level bench. Locate slot
near right rear corner of RF section; also, locate metal
tab on IF section that engages with this slot.
b. Grasp the 8553B RF section near middle of
chassis and raise until it is a few inches above the IF
section.
c. Tilt RF section until front of assembly is about 2
inches higher than the rear.
d. Engage assemblies in such a way that metal tab
on the rear of the IF section slips through the slot on RF
2-10. POWER REQUIREMENTS
section.
e. With the preceding mechanical interface
2-11. Source Power
completed, gently lower RF section until electrical plug
and receptacle meet.
2-12. The Spectrum Analyzer can be operated from a
f. Position RF section as required to mate the plug
50 to 60-hertz input line that supplies either 115-volt or
and receptacle. When plug and receptacle are properly
230-volt (+10% in each case) power. Consumed power
aligned, only a small downward pressure is required to
varies with the plug-ins used but is normally less than
obtain a snug fit.
225 watts.
2-1
