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 - 28 - Issue: 5.3.x
Rev 2
MAC used (i.e. 5.6km, 8.0km or 11.4km). The FDHDR error rate should be less than 1/10000 for a good
link. Between 1/10000 and 1/1000 is marginal, and an error rate higher than 1/1000 is bad.
9.1.9.2 TX
The FDHDR TX counter should never increment because an SU cannot transmit FDHDRs.
9.1.10 RGR
Reservation (Grant) Request (Rx) / Reservation (Grant) Request Acknowledgement (Tx)
9.1.10.1 RX
Reservation Request Acknowledgment received by the SU. This is sent by the AP in response to it
receiving a Reservation Request from the SU. Upstream bandwidth may be granted to the SU in the same
frame, but doesn’t have to be.
9.1.10.2 TX
Reservation Request sent to the AP from an SU. This is one method the SU can use to request upstream
bandwidth. (The other method is to piggy-back requests on to cells sent upstream. Piggy-backed requests
do not appear in the MAC stats).
9.1.11 ACK
(Cell) Acknowledgement
9.1.11.1 RX
Acknowledgements transmitted by the SU. These are generated by the SU when it receives a valid cell or
cells from the AP in the downstream portion of the frame.
9.1.11.2 TX
Acknowledgements received from the AP. These are generated by the AP when it receives a valid cell or
cells from the SU in the upstream portion of the previous frame.
9.1.12 CELLS
CELLS are the number of ATM CELLS that have been transmitted from, or received by the MAC, and
carried by the RF link.
9.1.12.1 RX
RX cells are cells that are received from the AP. This count is includes cells destined for other SUs.
9.1.12.2 TX
TX cells are cells that are transmitted from the SU to the AP. This count includes retransmitted cells (i.e.
the count is incremented every time a cell is transmitted over the RF link, regardless of whether it is a new
cell, or a repeat).
9.1.13 Tx
The tx is the number of ATM cells entering the MAC from the Helium processor, to be sent upstream on
the air interface. This does not include retransmissions: it is the number of unique cells that need to pass
over the air. This number may be significantly less that the CELL TX count (see above).