R
R
F
F
-
-
6
6
0
0
0
0
0
0
E
E
M
M
i
i
c
c
r
r
o
o
w
w
a
a
v
v
e
e
R
R
F
F
R
R
e
e
p
p
e
e
a
a
t
t
e
e
r
r
— Chapter 5. Repeater Tests
RF-6000E Operations Manual
62
Receive and Transmit Attenuator Pads
Receive, RX, pads attenuate input signals that are greater than can be compensated by the repeater
amplifier’s AGC/ALC circuits. Receive pads are installed on the amplifier input (RF IN) jack.
Transmit, TX, pads attenuate output signals. Transmit signals can also be reduced by adjusting the
AGC/ALC potentiometer. In cases of very short hops, more power reduction may be needed. In these
cases a TX Pad is normally installed. Transmit pads are installed on the amplifier output (RF OUT)
jack.
Pad Installation:
1. If required in the field, the RX/TX attenuator pads should be installed at the RF input or output of
the amplifiers.
2. To install the pad, turn OFF the DC power supply first.
3. Disconnect the input or output semi-rigid coax cable from the amplifier.
4. Connect the SMA male end of the pad to the amplifier’s SMA female input or output; and then
connect input or output cable to the female end of the pad.
5. Check all coaxial connections for tightness (8 in-lbs).
6. Turn ON the DC power supply.
7. Set output power level by adjusting AGC/ALC.
Radio Link Tests
Once the repeater levels have been set and confirmed and antenna alignment is accepted, then
confirm microwave signals are received at each terminal radio. Observe and record the receiver AGC
or RSL indications for reference.
End to end link tests can now be run. These tests may typically include un-faded BER, radio errors,
system thermal and intermodulation noise. Refer to the radio terminal equipment documentation and
system engineering requirements for the link test plan.
Completion
When setup and tests are complete, set the RMAS Transmit Alarm LED SWITCH jumper to the ENB
position to conserve power by only displaying alarm LEDs when the yellow test button is pressed.
Refer to the RMAS-120 manual for alarm system tests.