ELECTRO-METRICS RVR-30M VERTICAL ANTENNA
(RVR30M-2)
3.1 Frequency Range Switch
Type:
Ten position rotary switch.
Location:
Right side of the antenna base.
Function:
To select one of ten RF Frequency Ranges.
3.2 Signal Out Connector
Type:
TNC, female.
Function:
Connects the signal received by the antenna to the RF Input Connector of the
50-ohm instrument.
4.0 Theory Of Operation
The Model RVR-30M Vertical Antenna, is basically a 1-meter (41-inch) rod. As is the
case with any rod antenna, optimum transfer of an intercepted signal to the receiver using 50-
ohm cable requires that the rod be fed to an impedance transformation network. Since it is
feasible to optimize this network for no more than approximately octave segments of its
frequency range, it is necessary to switch networks in order to cover the more-than-ten-octave
range of 9 kHz to 30 MHz.
The matching networks are mounted in the base of the antenna and a manual ten-position
switch is used to switch in the appropriate impedance tranformation network.
5.0 Operating Procedures
5.1 Antenna Set-Up Procedures
a.
Mount the antenna base to the Model TRP-136 Tripod. The antenna base is
secured to the tripod by screwing it in a clockwise direction, as viewed from
above.
b.
Place the Model GPA-30 Counterpoise over and attach it to the top of the antenna
base. Secure the Counterpoise by screwing the four captivated thumb screws on
the counterpoise into the threaded holes provided at the corners of the antenna
base.
NOTE:
Some test standards require that the counterpoise be bonded to
the ground plane by a heavy copper strip. Check the test
standard being used for method and technique.
c.
Screw the extensible rod into the socket on the top of the antenna housing. Extend
the rod to its full 1-meter (41-inch) length.