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2-4. FIXED STATION INST ALLATION.
See figures 2-4 and 2-5 for various configurations
of TR-7 fixed station installations.
TR7
13.6 VDC
EXT
. SPKR
- -
'
ANT
0
O
0
O
To Antenna
MS7
PS7
Do.
o
Power cable
GND
PS7 Control cable
\...
Speaker cab l e
PS7
1
1
1
AC
13 .6VDC
Gñ)
(
)
\..
\
111
NOTE : Be sure PS-7 Line Voltage program1ng
...
...t1
is correct for your in sta ll ation .
~ A C Line
Figure 2 -4. Connecting the PS-7 Power Supp!y and MS-1 Speaker
2-4.1. ANTENNA REQUIREMENTS .
The TR-7 is designed for use with antenna system s
having a nominal impedance of 50 ohm s. Care
should be exercised to reduce the VSWR to the
lowest possible value for best operation.
If
the
VSWR exceeds 2:1, the tran srnitter output power
2-5
TR7 OPERATOR 'S MANUAL
will be reduced in accordance with th e table shown
in the SPECIFICATIONS section of this manual.
When using antennas which do not present a low
VSWR, the use of a mat ching network such as
those manufactured by the R . L. Drake Company
is recornmended. Additional information on ante n-
nas can be found in reference texts such as the
ARRL Handbook .
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