Rack-Mount RDMS
TM
Telemetry Receiver
35
Quasonix, Inc.
AGC Zero is used to set a baseline for background radio noise levels. The front panel displays provide visual
indications whether the AGC is zeroed or not. If AGC Zero has not been set, the signal strength bar displays in
yellow and lacks the red zero indication line, shown in Figure 51.
Figure 51: Waveform Graphics Before AGC Zero Set
A typical application of the AGC Zero function is explained in the following example.
1.
Connect the receiver to its normal RF signal source, such as antenna, LNA, cabling, and splitters.
2.
Orient the receiving antenna in a direction that is expected to yield the lowest signal level that the receiver
is likely to encounter.
3.
Activate AGC Zero under this condition. (Scroll to AGC Zero, and then press the Enter key on the front
panel, as shown in Figure 52.)
4.
An AGC Zero Set message briefly displays, as shown in Figure 53, to indicate AGC Zero is activated.
5.
After the AGC Zero is set, the signal strength bar changes from yellow to green, and a red line indicates the
zero value set, as shown in Figure 54.