SpectraLink Corporation
Installation and Operation
Link WTS – Link 150 M3 MCU
11. Technical Parameters
11.1 Select Alternate Spread Spectrum Sequence
The Link WTS uses spread spectrum radio transmission. Spread spectrum takes a discrete
signal, such as a digitized voice conversation, and spreads it over a wide range of
frequencies rather than transmitting at a single carrier frequency. The frequency range
may need to be adjusted if other wireless devices in your facility, such as data terminals
or bar code readers, share the same frequency band.
Units shipped from the factory are preset to operate on sequence 1, which spans the entire
spectrum from 902MHz to 928MHz. If interference between the Link WTS and other
900MHz radio devices is anticipated or observed, any one of six alternate sequences can
be selected.
Determine the frequency band of the interfering device, then use the frequency ranges
below (given in MHz) to select the best interference avoidance pattern for the situation.
Sequence
Frequencies Used by SpectraLink
1 902-928
2 902-915
3
902-909 & 921-928
4 914-928
5
902-904 & 909-921
6
904-910 & 920-928
7 908-922
To change a system to an alternate sequence, perform the following steps for
EACH
MCU.
1. Wait for any calls in progress to end. Power the system OFF, then slide the mode
switch to the
REGISTER
position.
2. Power the system ON. Status LEDs 5 and 1 should be lit, indicating frequency
selection mode. One of the line LEDs from 1 to 7 will be indicating the current
frequency selected for the MCU.
3. Use the
STEP
button to select the desired new sequence.
4. Press the
DEL/ENTER
button. The LED indicates the new frequency that has been
selected.
5. Return the mode switch to the
NORM
position.
6. Repeat Steps 1-5 for each MCU of a multi-unit installation.
Part Number: 72007501D.doc
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