Specifications

10
Two-box setup
A two-box ESG Option 201 configuration is for situations where more
real-time CDMA channels, power levels, or higher radio configurations
are required than are available from a single ESG. In addition to the
Pilot, Sync, Paging, and RC1 or RC2 traffic channel, a two-box setup
provides two RC3, RC4 or RC5 traffic channels. The RC3, RC4 and RC5
traffic channels allow testing of IS-2000 receiver designs. Note: The ESG
Option 201 also supports the capability for a third RC3, RC4, or
RC5 traffic channel with some limitations. If a third IS-2000 traffic
channel is assigned, some I/Q distortion may be present.
Figure 6 shows the basic architecture of the two-box solution. In this
solution, each baseband generator has the capability to provide up to
four IS-95 channels or up to three IS-2000 channels (refer to the note
above regarding three IS-2000 channels). The I and Q outputs of the two
baseband generators are summed together and fed into ESG #1 where
amplitude and frequency control takes place. The RF output is provided
by ESG #1. The RF output of ESG #2 is used solely to create the chip
clock, which drives the baseband generators. Alternatively, an external
function generator may be used to provide the chip clock.
Baseband Generator #1
(channels 1-4)
Baseband Generator #2
(channels 5-8)
RF Section #2
RF Section #1
RF Out
RF Out
Amplitude
Control
Frequency
Control
I/Q Power
Scaling
I/Q Power
Scaling
Chip Clock
ESG #1
ESG #2
ESG Option 201
Real-time IS-2000
Personality
Σ
Clk In
Clk In
I
Q
I
OUT
Q
OUT
I
OUT
Q
OUT
I
IN
Q
IN
I
Q
Σ
Figure 6. ESG Option 201 two-box architecture