Trouble Shooting Guide
Table Of Contents
- Troubleshooting-Installing an RF link
- Issue : 5.3.x
- Authors : Matt Olson/Dave Sida
- Date : 30th July 2004
- CONTENTS
- CHANGE HISTORY
- INTRODUCTION
- Aligning an SU
- Fine tuning an SU
- SU signal quality
- Troubleshooting SU link from AP
- Link status
- AP Link Status
- SU Link Status
- MAC type
- Unit MAC address
- Channel
- Radio Channel Mask
- Correlation sequence
- MAC delay compensation
- Unit Range
- Base Station ID
- Radio Temperature
- RSSI
- Path loss in excess of FSL (estimate)
- Downlink RSSI Fade Margin
- TX maximum backoff
- TX current backoff
- Max TX power for channel
- Actual TX power
- Averaging MAC error rates over
- Downlink Header Error Rate
- Downlink Cell Error Rate
- Uplink Cell Error Rate
- Modem RSSI
- Mac stats
- Modem txpower
- Modem mmse
- PNMS Sector
- Survey Scan
- Modem msreg 6 1
- Modem rxdc stats
- Bun list channels
Axxcelera Broadband
Troubleshooting-Installing an RF link - 36 - Issue: 5.3.x
Rev 2
13 Survey Scan
A Survey Scan can be conducted from the CLI or the web interface. This feature is only applicable to
FPGA APs and SUs. The "survey scan" CLI command and 'radio survey' web page now provide additional
data on RF energy in each channel. Continuous or bursty energy can be detected, regardless of the source
(i.e. it does not have to be Axxcelera equipment), providing it is present during the scan. However, the RF-
energy-scan process interrupts normal service for the entire duration of the scan. Survey results are saved in
a temporary file called "ap_scan" or "su_scan", as appropriate. The file contains results of the last scan to
be performed, and is overwritten by a new scan. The file is normally lost when the unit reboots, but the file
is saved if a "config save" is performed, or if the unit is upgraded. Therefore, it is now possible to use the
"survey scan" command remotely, i.e. executing on an SU via the RF link.
This feature can be used at the time of unit installation, or when trying to investigate and mitigate an
interference problem. It can also be used before performing a sector channel change to look for potential
interference problems.
When performed on an AP the sector itself is quiet, so any RF energy detected must be coming from other
sources. However, when a scan is done on an SU the AP and other SUs may still be transmitting. This
may confuse the results. The RF energy from other units in the SU's sector will be detected on-channel, but
will also appear to a lesser extent in adjacent channels (e.g. 23dBm lower than in the main channel). This
should be borne in mind, and if necessary the scan should be performed with the AP transmitter disabled,
which will silence that sector (e.g. using "hmm modem rf disable/enable").
Web Interface
1. To open web page type <http://ipaddress:8000/index > in the URL of your web
browser.
2. Enter the password of the unit. This is the same password that is used for telnet
access.