Agilent Technologies 8960 10 Series Reference Manual page 504

Block Diagram
The hardware architecture of the test set provides a number of parallel signal paths through the instrument.
This parallel architecture allows the measurement hardware to run some measurements concurrently. See
"Concurrent Measurements" on page
Description
RF Interface
Bridge
Power
Detector
RF Interface Module
Input and output signals are routed through the RF Interface module. The RF Interface module consists of a
directional bridge for sampling incoming power and hybrid power splitters which create 4 bidirectional ports,
(two receiver ports and two source ports), RF amplifiers, video gain circuits, and fast and slow power detectors.
The sampled input power from the directional bridge is routed to a fast power detector or a slow detector. The
fast power detector has a response time of several microseconds and can measure power during the bursts of
TDMA systems.
The RF Interface module provides two identical RF Source path connections to the In/Out port of the
instrument. There is about 25 dB of isolation between the two source paths. There is about 35 dB of isolation
between the source paths and either receiver path. The RFIO module has nominally 23 dB of insertion loss in
the source path. A temperature sensing circuit facilitates compensation for path loss variation with
122.
RF Source 1
RF Source 2
(Optional)
High
Audio In
Low
Measurement
Downconverter
Log
IF
Demodulation
IF
Downconverter
S:\Hp8960\E1960A GSM Mobile Test Application\A.04 Release\Reference_Manual\Chapters\gen_block_diagram.fm
Baseband
Audio Section
Generator
Baseband
Protocol
Generator
Processor
(Optional)
Host
Processor
Analog Digital
Digital Signal
Converter
Processor
A/D
A/D
Voltmeter/Counter
A/D
A/D
Demodulated FM
Block Diagram
GPIB
LAN
VME
Bus
DVM Hi
DVM Lo
Counter
504