User Manual

ADCP-75-192 • Issue 1 • December 2005 • Section 2: Description
Page 2-18
 2005, ADC Telecommunications, Inc.
Table 2-10. FBHDC User Interface
REF
No.
USER INTERFACE
DESIGNATION
DEVICE FUNCTIONAL DESCRIPTION
1 IF1 and Tx1 Connectors SMA Connector Connect to FSC and BIM, respectively. If
direct connect is desired, supply -4dBm
composite power to Tx1 (-7 dBm for iDEN).
2 IF2 and Tx2 Connectors SMA Connector Additional downlink path (see Ref(1)).
3 Fault LED Single-colored LED
(Red)
Status indicator turns red when module has
failed. Indicator is lit during start-up until
the module has initialized. Indicator will
blink after module receives a system clock
and is awaiting initialization
4 IF3 and Tx3 Connectors SMA Connector Additional downlink path (see Ref(1)).
5 IF4 and Tx4 Connectors SMA Connector Additional downlink path (see Ref(1)).
6 Test SMA Connector Accepts test signal from BIM
7 Power LED Single-colored LED
(Green)
Status indicator turns green when module
has power.
Attenuation is required between the BTS and each input of the FBHDC (in direct connection
configuration), or the Tx0 input of the BIM (in duplex mode) to restrict the FBHDC input
range to a max composite value of -4dBm (–7 dBm for iDEN). For each channel, a cable is
required between this power attenuator and the FBHDC or BIM input.
• One (1) FSC is required per sector. One FSC can accept the output of two (2) FBHDCs per
sector.
• One (1) cable is required per FBHDC to carry the test tone from the BIM FWD 1 or 2
ports to the Test input on the FBHDC.
6.2 Forward Simulcast Card (FSC)
The Forward Simulcast Card (FSC), shown in Figure 2-17, converts the IF signals from the
FBHDC to Digitized IF (DIF) format. There are eight (8) separate analog-to-digital conversion
circuits on one (1) FSC. This module is specified at one per sector per tenant per 8 RANs. The
references for the FSC are shown in Table 2-11.