YSI MIQ/Blue PS Set - Manual (Page 21)

MIQ/Blue PS Installation
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Note
If it is not possible to keep the minimum distances of the MIQ/Blue PS
masters, you can reduce interferences of the radio communication by
shielding the modules against one another (e.g. by using directional
antennas with side-lobe suppression in conjunction with attenuators). If
necessary, contact a radio technology specialist.
Note
If high gain antennas in order to increase the range are used, the
requirements of the directive 1995/5/EC will not be met.
Range test with
attenuator
To test the quality of the radio link, carry out the following test with a
defined signal attenuation:
Note
If a canopy is used, the MIQ/Blue PS has to be mounted lower on the
canopy for the duration of the range test. If necessary, use the lower
boreholes in the plastic canopy (SSH/IQ) for this.
1 Unscrew the antenna from on of the two MIQ/Blue PS mod-
ules. For the test, insert the attenuator with both adapters
between the antenna connector of the module enclosure and
the antenna.
2 Test the radio link with the attenuator under the most unfavor-
able conditions such as with installation on rotating scraper
bridges and the utmost distance of both MIQ/Blue PS mod-
ules.
If the test is successful with signal attenuation, faultless oper-
ation should also be possible under unfavorable conditions
(e.g. fog, heavy rainfall, snow).
3 To terminate the test operation, remove the attenuator and
mount the antenna directly on the MIQ/Blue PS again.
4 If you had mounted the MIQ/Blue PS lower on the canopy for
the test:
Mount the MIQ/Blue PS higher on the canopy again.