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Bosch ICP-EZM2 Easy Series System Reference Manual
Also see for ICP-EZM2: Quick start guideInstaller's guideSystem reference guide
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Easy Series System Installation and Configuration | en 21Bosch Security Systems, Inc. System Reference Guide F01U087835 | 02 | 2008.102.5.4 wLSN Installation Tool Mode 3When you perform the RFSS Site Test record the highest and lowest SNR readings becauseyou may need to compare them.If the results for SNR fluctuate significantly, the location is:– OK if you subtract the dB difference between the highest (H) result and the lowest (L)result, and the number equals more than 13 dB. Confirm the location is OK by testingwith the actual wireless device for this location. (L - (H - L) ≥ 13 dB = OK– Not OK if you subtract the dB difference between the highest (H) result and the lowest(L) result and the number equals less than 13 dB. In this case, select a new location totest. (L - (H - L) ≤ 13 dB = Not OK)To test the wireless devices with the Installation Tool in Mode 3:1. Verify that the wLSN Hub rotary switch is set to S1 = 9, S2 = 2, S3 = 0. Refer to Figure 1.1,Page 6. The wLSN Hub's LED flashes slowly.2. Go to the first device location, and then press and hold [*][#] on the Installation Tool for2 sec.3. Press [3] for Mode 3.4. Place the Installation Tool in an upright position at the first device location, or hold it inthe location, if necessary.5. Wait 10 sec and then review the display.In the Mode 3 display, "SNR yy" refers to the signal to noise ratio in dB and "x" is theRFSS value in dBm.The Mode 3 display shows the signal to noise ratio (SNR) at the test spot. S refers to thesignal strength of the incoming message from the wLSN Hub to the Installation Tool. Nrefers to the ambient noise level that exists at the location. The signal must be greaterthan the noise (S>N). The higher the SNR, the stronger the location's signal at thatlocation. Dashes, appearing on both the S and N lines, indicate unacceptable signalstrength.6. Note the readings for the location, especially the SNR values.7. Refer to Table 2.5 to interpret the results based on the lowest and highest readings.If one or more of the results for SNR falls below 13 dB, the location is Not OK.Table 2.5 Signal to Noise Ratio DataIf the location tests:– OK: Confirm that the location is OK by testing it with the actual wireless device for thislocation.– Not OK: Test a different location.M O D E 3 : S - x x x d B mS N R Y N - x x x d B mSignal to Noise Ratio Signal Strength< 9 dB Unacceptable9 dB Marginal (not recommended)13 dB Acceptable16 dB Good20 dB Very good22 dB Excellent |
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