GE MDS Mercury 900, Reference Manual

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144 Mercury Reference Manual 05-4446A01, Rev. E
Additional Considerations for Mobile Operation
Consider the following key points for all mobile installations:
SNR
(Signal-to-Noise Ratio) Strong signal (bench
setting): 25-28 dB
Operational: 3-30 dB
Typ. System: 10-20 dB
A low SNR may be caused by
noise or interfering signals.
TX Freq. Offset 0-22,875 Hz Adjusts to accommodate what
is expected by the AP.
RX Freq. Offset 0-22,875 Hz Adjusts to accommodate what
is expected by the AP.
Total FEC Count Varies
Corrected FEC Count Varies
Uncorrected FEC
Count Varies
Current AP Name Device name of
associated AP Typically set to reflect the
application or system the radio
is used in.
Table 3-12. Mercury Remote Transceiver (Continued)
(Performance Information>>Internal Radio Status Menu)
Name Target Value Notes
Table 3-13. Mercury Access Point
(Performance Information>>Wireless Network Status>>
Remote Performance Database)
Name Target Value Notes
MAC ADDR MAC Address of
associated Remote Must match Remote’s MAC
address exactly
RSSI
(Received Signal
Strength Indication) Varies The less negative an RSSI
reading, the stronger the
signal (i.e., -75 dBm is
stronger than -85 dBm).
SNR
Signal-to-Noise Ratio Strong signal (bench):
25-28 dB
Operational: 3-30 dB
Typ. System:10-20 dB
A low SNR may be caused by
noise or interfering signals.
Downlink Varies QPSK/FEC-3/4 Preferred
Uplink Varies QPSK/FEC-3/4 Preferred
FEC Total Varies
Corrected FEC Count Varies
Uncorrected FEC
Count Varies