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N4850A
N4860A
DigRF v3 Digital Acquisition and Stimulus Probes
Logic Analyzers
Meeting the Measurement Challenge of the
DigRF Digital Serial Interface
The DigRF v3 standard presents new challenges for mobile wireless
development, integration and validation teams as the communica-
tions link between the BB-IC and RF-IC evolves from analog to digi-
tal. Spectrum analyzers used to evaluate analog interfaces are
incapable of measuring the DigRF digital serial interface.
Agilent’s N4850A acquisition probe and the N4860A stimulus
probe operate in conjunction with Agilent 16800 and 16900 Series
logic analyzers to provide the digital serial acquisition and stimulus
capabilities required to independently evaluate an RF-IC or BB-IC
with a DigRF v3 interface or integrate your mobile wireless designs.
The integration of DigRF v3 logic analysis tools with the
Agilent RF portfolio provides the cross-domain solutions that will
help you rapidly deploy your DigRF v3-based designs.
Specifications
N4850A DigRF v3 Digital Acquisition Probe
State Analysis for DigRF v3-Compliant Devices
• Maximum acquisition speed: 312 Mbps
• Voltage level support: 1.8 V LVDS, 1.2 V LVDS, SLVDS (200 mV min);
See data sheet for SLVDS value updates
• SysClk speed support: 19.2 MHz, 26.0 MHz, 38.4 MHz
• Over air standard support: 2.5G and 3GPP (e.g. GSM, EDGE, CDMA,
cdma2000, W-CDMA)
Monitor Device and System Operation
• Simultaneously acquires Tx/Rx bidirectional traffic
• Tracks changes across all speed modes – sleep, low power and
high speed
• Displays data and control packets at the protocol level
• Triggers on protocol-specific packets, specific bits within a packet,
and protocol violations
Additional Capabilities
• LEDs show DigRF v3 bus status and error conditions
• Identifies invalid sync words
• Supports up to 2048 bits for user-defined payload
• Extracts and transfers digital IQ for analysis with 89600 VSA software
Configuration Considerations
• Requires 16800 or 16900 Series logic analyzers with 68-channels or more
• E5381A flying lead set recommended for high impedance probing for
signal integrity
• For stimulus, add an N4860A DigRF v3 stimulus probe and use a logic
analyzer with a pattern generator
• Customize DigRF v3 protocol decoding with the B4641A Protocol
Development Kit
N4860A DigRF v3 Digital Stimulus Probe
DigRF v3 Compliant Digital Stimulus
• Maximum stimulus speed: 312 Mbps
• Voltage level support: 1.8 V LVDS, 1.2 V LVDS, SLVDS
• SysClk speed support: 26.0 MHz (Contact Agilent for 19.2 MHz or
38.4 MHz support)
• Over air standard support: 2.5G and 3GPP (e.g. GSM, EDGE, CDMA,
cdma2000, W-CDMA)
Stimulus Probe Operation
• Converts raw IQ and control information to DigRF v3-compliant data and
control packets
• Provides continuous DigRF v3 stimulus to replace a missing BB-IC
or RF-IC
• Enables modification of critical control settings while looping
Methods for Creating Raw Digital IQ in Simple ASCII Format
• Signal Studio
www.agilent.com/find/signalstudio
• Advance Design System (ADS)
www.agilent.com/find/ads
• Custom programming package
• Captured logic analyzer trace converted to digital stimulus
Configuration Considerations
• Requires N4850A DigRF v3 acquisition probe
• Requires 16800 or 16900 Series 68-channel logic analyzers (or more) with
a pattern generator
• Connects to target using SMA (m-m) connectors
• Refer to data sheet for more information
Accessories
B4641A Protocol Development Kit
– used to customize the DigRF v3
packet decoder for your unique extensions to the standard
Key Literature & Web Link
Agilent Solutions for the DigRF v3 Digital Serial Interface Used in Mobile
Wireless Devices Brochure, p/n 5989-6224EN
N4850A DigRF v3 Acquisition Probe and N4860A DigRF v3 Stimulus Probe
Data Sheet, p/n 5989-6058EN
www.agilent.com/find/DigRF
www.agilent.com/find/logic
www.agilent.com/find/DVSA
www.agilent.com/find/E4438C
www.agilent.com/find/signalstudio
www.agilent.com/find/scopes
Ordering Information
Order the following to configure a complete DigRF v3 digital acquisition
and stimulus system. Refer to the data sheet for more detailed
information
DigRF v3 Probes
N4850A
DigRF v3 Acquisition Probe
N4860A
DigRF v3 Stimulus Probe
Logic Analyzer with 68 Channels (or more) and
a 48-channel Pattern Generator
16800 Series portables:
16822A
(68-ch)
16823A
(102-ch)
16900 Series modular system: A 16900 Series mainframe with at least one
each of the following:
16900
Series Logic Analyzer Module
16720A
Pattern Generator Module
Probe between the N4850A and the Device under Test
One of the following for each N4850A. The E5381A differential flying lead
probe is recommended for the highest signal quality
E5381A
Differential Flying Lead Probe
E5405A
Differential Pro Series Soft Touch Probe
E5387A
Differential Soft Touch Probe
E5379A
Differential Samtec Probe
Samtec Probes between the N4850A and the Logic Analyzer
Order two Samtec probes that are compatible with your logic analyzer
E5385A
Samtec Probe for Logic Analyzers with a 40-pin Cable
Connection (16800 Series, 16910A, 16911A)
E5378A
Samtec Probe for Logic Analyzers with a 90-pin Cable
Connection (16950A/B, 16951B)
Order Separately to:
Analyze digital IQ:
89601A
VSA Software
Create digital IQ data:
Signal Studio, Advanced Design System (ADS)
Customize the DigRF v3 packet decoder for your unique extensions to the
standard:
B4641A
Protocol Development Kit
• Independently validate your DigRF v3-based BB-IC and RF-IC
• Rapidly deploy DigRF v3-based designs using Agilent’s
integrated and cross-correlated logic analysis and RF tools
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