Click here to make tpub.com your Home Page

Page Title: Figure 37. Coupler, Antenna CU-890/URM-85, schematic diagram.
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 



( 1 ) above). The proper stepdown
shielded pickup loop at one end of a 9-inch
long probe, which is terminated in a mod-
r a t i o is obtained by rotating band
switch S1101 at the front of the
ified N -type connector at the opposite end
a n t e n n a housing to the same fre-
of the probe. Therefore, the loop is insen-
quency band in use by tuning unit 1.
i t i v e to the electric field component of
(2) Impulse generator signal path and
r a d i o interference signals, but is highly
to the  - m a g n e t i c  f i e l d
a t t e n u a t o r pad. When the vertical
responsive
a n t e n n a base with the five series-
component. Because of the reactively low
frequencies involved as compared with the
c o n n e c t e d mast sections is used,
c a l i b r a t i o n of the test set is ac-
frequencies encountered in tuning units 2,
complished in the same manner as
3, and 4, a number of turns of wire is re-
that described for the loop antenna
quired in the loop to induce an output signal
( a ( 2 ) above). The attenuator pad,
o f proper amplitude for driving the rf
which consists of R1101 and R1102,
a m p l i f i e r circuit in tuning unit 1. Con-
i s housed within connector J1102
nector plug P1301 delivers the signal
a n d provides 20-db of attenuation
power through the red color-coded coaxial
to the impulse generator cali-
c a b l e of Cable Assembly Set, Electrical
b r a t i n g signal. This attenuation is
MX-3410/URM-85 to the main unit front-
c o u n t e r b a l a n c e d as described in a
panel SIGNAL INPUT jack.
(3) above.
d. Coupler, Radio Frequency Interfer-
c. Probe, Magnetic Field, Interference
ence  CU-891/URM-85  (D, fig. 38). To con-
M e a s u r i n g MX-3409/URM-85 (A, fig. 38).
d u c t rf signals or noise interference sig-
To localize the magnietic field components
nals from 50-ohm impedance two-wire
of rf interference in the 150-kc to 30-mc
a u d i o - s i g n a l or electrical powerlines in
frequency range, a magnetic field probe is
t h e 150-kc to 30-mc frequency range, a
employed. This signal pickup device con-
capacitive-type pickup device is employed.
sists of a 3-inch diameter electrostatically
This coupler consists of a rectangular
Figure 37. Coupler, Antenna CU-890/URM-85, schematic diagram.
83


Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business