WavePhore Networks IDR V1000, User Manual

Page: 23 / 63

Interpreting Screen Displays
4–2 MS-4900, Rev. A
Check Signal
Quality The “superscreen” under the Show Status topic provides a quick summary of signal
status, but most of the fields relate to stat mux operation (*):
Figure 4-1. Superscreen
NOTE: In general, any incrementing number field of the superscreen, other than
the “incoming packets” field, indicates poor signal quality.
Table 4-2. Superscreen Fields, Stat Mux Data
Superscreen
Fields Field: Should be: Meaning:
Incoming
packet
counter Incrementing Stat mux data is being received; no action
is needed.
CRC errors Not incrementing An incrementing number indicates data
errors.
Check receiver installation; monitor
weather conditions.
Link block
frame loss Not incrementing An incrementing number indicates data
loss.
Carrier lock
status L = Locked on signal Check receiver installation and monitor
weather conditions if lock (L) is not
established or if the receiver keeps losing
its lock
Modulation
type BPSK/QPSK Information only; no action is needed.
Type of data B = blocks (sync data)
P = packets (no blocks)
C = characters (no packets) Data mode of current input stream.
A blank field means no data is being
received.If Eb/No reading is low, check
receiver installation and monitor weather
conditions.
Corrected
FEC errors Not incrementing rapidly Data probably has not been lost if the
number increments slowly. If Eb/No
reading is low, check receiver installation
and monitor weather conditions.
Uncorrected
FEC errors Not incrementing Data possibly has been lost if this number
increments. Check receiver installation
and monitor weather conditions.
Packet
framing
errors Not incrementing Check receiver installation and monitor
weather conditions.
0 0 0L BPSK
X 0 0 0 0 0
Incoming packet
counter* or
character counter
Carrier lock
status
Modulation type
Type of data
Corrected
FEC errors*
Uncorrected
FEC errors*
Packet framing
errors*
Not applicable
Not applicable
CRC
errors*
Link block
frame loss*