ADC Digivance CXD, Operation Manual

Page: 57 / 74

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.transceptTenantRan Y OutputPower fields of the
Tenant OAM MIB, examine the PA output power for each RAN in the simulcast
3. Using the transceptTenantGenTwoTable. transceptTenantRuc Y AttenOffset 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