
5-15
5.4 FIELD TEST POINT CONSIDERATIONS
The same basic rules apply to the 3SR/3SRV. Too much signal level
on the input of the unit can cause inconsistent sweep readings. The
forward telemetry level should be 0 dBmV ±12 dB on the input of
the 3SR. This again can be verified by checking the lower right
corner of the 3SR/3SRV display while sweeping forward. In-line pads
provide a quick way to reduce signal level on the 3SR/3SRV input.
Figure belowshows methods of connecting to amplifiers that have
either a single bi-directional or two-directional test points.
5.5 INSTALLATION OF MODEL 3HRV-- MULTI-USER REVERSE
SWEEP TESTING
While adding a 3HRV to the system, a few things need to be
remembered. The 3HRV has its own telemetry signal. This must be
set at a different frequency from that of the forward telemetry signal
in the 3ST, if both units are being used. Both telemetry frequencies
must be entered in the 3SRV. If you do not have places to enter both
System Sweep Recei ver Model 3SR
LEVEL TILTSCAN S WEEP
C/N HUMMODSPECT
FILE
AUTO
SETUP
FREQ
CHAN
ENTER
FCNCLEAR
help
status
alpha
light
abcdefghi
jkl mno pqr
stu v wx
yz
space +/-
123
456
789
0
x
.
H
L
H
L
YY
Y
Amplifier Station
OUT
IN
SPLITTER
System Sweep Receiver Model 3SR
LEVEL TILT SC AN SWEEP
C/N HUM MOD SPECT
FILE
AUTO
SETUP
FREQ
CHAN
ENTER
FCNCLEAR
help
status
alpha
ligh t
abc def ghi
jkl mno pqr
stuvwxyz
space +/-
123
456
789
0
x
.
H
L
H
L
OUT
IN
Amplifier Station
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