User manual
AP User Manual January 2004
Software Release 4.1
This functionality can be used during the alignment of an SM, but is especially helpful for frequency
selection during site planning.
The following procedure causes the SM to drop any active RF link. If a link is dropped
when the spectrum analysis begins, the link can be re-established after a 15-minute
interval has elapsed.
Procedure 6: Enabling spectrum analysis
The Spectrum Analyzer in SM and BHS feature provides this functionality. To enable this
functionality, the operator performs the following steps:
1. Access the Expanded Stats page of the SM.
2. On the Expanded Stats page, click Spectrum Analyzer.
3. On the Spectrum Analyzer page, click Enable.
RESULT: The feature is enabled.
4. Click Enable again.
RESULT: The system measures RSSI and dBm for each frequency.
5. Repeatedly click Enable.
RESULT: The system repeats the measurement and refreshes the displayed data until the
spectrum analysis mode times out, 15 minutes after the mode was invoked in Step 3.
5.5.3 Power Reduction to Mitigate Interference
In Release 4.1 and later releases, where any module (SM, AP, BH timing master, or BH timing
slave) is close enough to another module that self-interference is possible, the operator can set the
AP to operate at 18 dB less than full power.
The following procedure can cause the SM to drop an active RF link to a module that is
too far from the low-power AP. If a link is dropped when Power Control is set to Low,
the link can be re-established by only Ethernet access.
Procedure 7: Invoking the low power mode
The Power Control feature provides this functionality. To enable this functionality, the operator
performs the following steps:
1. Access the Configuration page of the module.
2. In the Power Control parameter, click Low.
3. Click Save Changes.
4. Click Reboot.
5. Access the Alignment page of a registered SM.
6. Assess whether the desired links for this module achieve
• RSSI greater than 700.
• jitter value between 0 and 4 in Release 4.0 and later releases or between 5 and 9 in
any earlier release.
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