Filter
Top Products
ADCP-75-192 • Issue 2 • June 2007
Page 45
© 2007, ADC Telecommunications, Inc.
• RAN Output Power – PA Output Power Minus 2dB diplexer/cable loss.
• RUC Attn Offset – Tenant MIB value used to adjust PA output power to account for
variations in RF chain.
Figure 11. FBHDC Direct Cable Balancing
Table 8 shows the recommended power levels and gains for the various CXD/NXD bands.
* Subtract 1 dB when using CDMA signals.
The FBHDC input balancing procedure is as follows:
1. Insert signals into FBHDC at the recommended input level (composite)
2. Using the transceptTenantCalTable.transceptTenantRanYOutputPower fields of the
Tenant OAM MIB, examine the PA output power for each RAN in the simulcast
3. Using the transceptTenantGenTwoTable. transceptTenantRucYAttenOffset field in the
Tenant OAM MIB, adjust the RUC attenuator to perform final adjustments with all
carriers present. A positive offset lowers the output power and negative offset increases it.
Table 8. Forward Setting
BAND
COMPOSITE
INPUT POWER
PA OUTPUT
POWER RAN OUTPUT POWER
FORWARD
GAIN
SMR-A -7 dBm +37 dBm +35 dBm (CXD)
+35.5 dBm (NXD)
+42 dB
SMR-B -7 dBm +37 dBm +35 dBm (CXD)
+35.5 dBm (NXD)
+42 dB
Cellular
*
-4 dBm +40dBm +38 dBm (CXD)
+38.5 dBm (NXD)
+42 dB
PCS *
-4 dBm +43 dBm +41 dBm (CXD)
+41.5 dBm (NXD)
+45 dB
21945-A
HUB
FBHDC
RUC
ATTN
RAN
OUTPUT
POWER
PA
OUTPUT
POWER
COMPOSITE
INPUT
POWER
RUC ATTN
OFFSET
RAN
PA
OUTPUT
LOSS