Microwave networks CM7, User Manual

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Microwave Networks
CM7/8 System User’s Manual Page 3-4-3
Front Panel Features
Refer to Figure 3-4-3 for the locations of the following indicators, controls, and test
points:
1. RF IN - SMA connector that accepts in-
put signal between -77 dBm and -25 dBm
at the receive frequency.
2. LO FREQ ADJ - DIP switch for coarse-
adjust of the LO frequency. May be used
to increase LO FREQ ADJ potentiometer
range.
3. LO FREQ ADJ Capacitor- Fine-adjusts
the LO frequency, and therefore, the re-
ceive frequency.
4. IF OUT - SMA interface that supplies the
70 MHz IF signal at -10 dBm to the DE-
MOD.
5. LPBK LO IN - SMA connector that re-
ceives the first conversion LO signal
from the adjacent TXU for RF local loop-
back test.
6. AGC MON - Test point for AGC voltage
(RSL).
7. RX ALM - Red LED controlled by the
ACU that indicates the RXU is in alarm.
8. GND - Test point ground connection.
9. LO MON - SMA interface that is a sam-
ple of the LO signal for monitoring. The
signal level is -5 dBm. The LO frequency
is equal to the receive frequency ±70
MHz.
10. TX LO OUT - SMA interface that con-
nects the LO signal from the synthesizer
to the associated TXU.
11. RF LPBK - Switch to configure the RXU
for RF local loopback operation.
F-1162
RF IN
RXU
AGC MON
RF LPBK
LO FREQ
ADJ
LPBK LO IN
IF OUT
RX ALM
GND
LO MON
TX LO OUT
OFF
1
2
3
4
5
6
7
8
11
9
10
Figure 3-4-3. RXU Features