User's Manual

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DCM000000104
Printed: 03.05.21,10:40
Revision Date:5/21/03
13
All signals that fall within a given Pass-Band range will “share” power amongst them.
A multiple channel effect is Intermodulation - signals produced from non-linear
effects between the intended channel signals. This intermodulation may cause
interference to receiving equipment. In order to minimize Intermodulation signals,
Power de-rating must be applied. In the USA there are FCC Intermodulation
Specifications published in the EIA Standard PN2009. Further de-rating is also
required to maintain the integrity of complex digital communications signals. The
Tables below gives the maximum per channel Output Levels allowed as a function
of the number of channels. Note that depending on the actual input levels, the gain
may need to be reduced to comply with the above regulations.
The figures shown are to the nearest dB.
iDEN / Cellular / Paging
(effective IP3 = +38dBm)
1.9 GHz PCS
(effective IP3 = +36dBm)
Power per
Carrier per
Antenna
Port (dBm)
Total Power
per Antenna
Port (dBm)
Number of
Carriers
Power per
Carrier per
Antenna
Port (dBm)
Total Power
per Antenna
Port (dBm)
Number of
Carriers
FM Dig FM Dig Digital Digital Digital
1 +24 +17 +24 +17 1 +15 +15
2 +18 +15 +21 +18 2 +13 +16
3 +15 +13 +20 +18 3 +11 +16
4 +13 +11 +19 +17 4 +9 +15
5 +12 +9 +19 +16 5 +8 +15
6 +11 +8 +19 +16 6 +7 +15
7 +10 +7 +18 +15 7 +6 +14
8 +9 +6 +18 +15 8 +5 +14
9 +8 +5 +18 +15 9 +4 +14
10 +7 +4 +17 +14 10 +3 +13
15 +5 +2 +17 +14 15 +1 +13
20 +3 0 +16 +13 20 -1 +12
25 +2 -1 +16 +13 25 -2 +12
30 +1 -2 +15 +13 30 -3 +12
Note:
The above levels are shown for both FM and Digital (CDMA, TDMA,
GSM, & iDEN) Signals for 800-900 MHz, and for Digital only for
1.9GHz. Some combinations may require additional De-Rating. Consult
Kaval Wireless Technologies for further information.
Remote Module Per-
Carrier De-Rating