Rohde & Schwarz RT-ZF1 User manual

R&S®RT-ZF1
USB 2.0 Compliance Test
Fixture Set
Manual
Manual
Version 07
1317432602
(=A[J2)

This manual describes the R&S RT-ZF1 USB 2.0 Compliance Test Fixture Set
(1317.3420.02).
© 2019 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: [phone] - 0
Fax: [phone]
Email: [email protected]
Internet: www.rohde-schwarz.com
Subject to change – Data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol, e.g.
R&S®RT-ZF1 is indicated as R&S RT-ZF1.

Safety Information
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3Manual 1317.4326.02 ─ 07
1 Safety Information
The product documentation helps you to use the product safely and efficiently.
Keep the product documentation nearby and offer it to other users.
Safety information warns you about the potential dangers and gives instructions
how to prevent personal injuries or damage caused by dangerous situations.
Throughout the documentation, safety instructions are provided when you need to
take care during setup or operation.
Intended use
The equipment under test (EUT) is a signal quality test and development board,
indented to be used at laboratory or test and measurement areas. These areas
are used for analysis, testing and servicing and where equipment is operated by
trained personnel (EN 61326-1, 3.9).
Operating site
Only use the product indoors, and keep it dry. The product has no casing and is
sensitive to moisture and humidity.
The product is suitable for pollution degree 2 environments where nonconductive
contamination can occur. For more information on environmental conditions such
as ambient temperature, see the specifications.
Safety instructions
Connect only USB interfaces to the boards.
Hot surface. The load board gets hot during testing. Do not touch. Risk of
skin burns. Risk of fire.
Electromagnetic emissions
The EUT is considered as a test probe, EN 61326-2-1, clause 5.2.4.101, note 1.
Therefore normal operation may increase emissions and/or reduce immunity in
certain applications.
Operation in type 3 (controlled) electromagnetic environments EN 61326-1, table
3 is recommended.
The EUT is an EN 55011 class A equipment. Class A equipment is intended for
use in an industrial environment. There may be potential difficulties in ensuring

Product Description
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4Manual 1317.4326.02 ─ 07
electromagnetic compatibility in other environments due to conducted as well as
radiated disturbances.
ESD and EMI impact
The product is sensitive to electrostatic discharge (ESD) because of open mod-
ules. Protect the work area against electrostatic discharge to avoid damage to
electronic components. Always work at a static-approved workstation.
Electromagnetic interference (EMI) can affect the measurement results. To avoid
any impact, use only USB cables shorter 3 m.
2 Product Description
The R&S RT‑ZF1 USB 2.0 compliance test fixture set is a product for automatic
testing of USB 2.0 compliance (high-speed) as well as USB 1.1 (full-speed) and
USB 1.0 (low-speed). It is used in combination with the R&S RTO/R&S RTP oscil-
loscopes, with the R&S RTO/R&S RTP-K21 USB 2.0 compliance test option
(1317.4103.02)/(1337.8685.02) and the R&S ScopeSuite software.
For data, see the "R&S RT-ZFxx Oscilloscope Test Fixtures - Specifications" at
www.rohde-schwarz.com/brochure-datasheet/rto.
2.1 Deliveries
The R&S RT‑ZF1 comprises two test boards and accessories:
●Load board (1317.5300.02)
●Signal quality board (1317.5200.02)
●Accessories, see table Table 2-1
●Carrying case
●Manual
Deliveries

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Table 2-1: Supplied accessories
Item Quantity Order number
USB cable type A to type B, length 20 cm 2 3589.2124.00
USB cable type A to type B, length 1.3 m 2 0041.9177.00
USB Adapter, type A to mini 1 3589.2147.00
USB adapter, type A to micro-B 1 3589.2130.00
SMA cable, length 1 m, to connect the signal generator 2 1142.5889.00
2.2 Oscilloscope Connections
The following oscilloscope configuration is suitable for high-speed, full and low
speed tests. For most tests, you can use either a differential probe or two single-
ended active probes. The signal quality board is designed for comfortable con-
nection of both probe types.
GND
D-
D- GND
D+ GND
GND
D+ Single-ended probes
Differential probe
Figure 2-1: Connectors for differential and single-ende probes
CH1 Single-ended probe connected to D+ (RT-ZS30)
CH2 Differential probe connceted to D+ and D- (RT-ZD30)
CH3 Single-ended probe connected to D- (RT-ZS30)
CH4 Inrush measurements
The test-specific connections are explained in the R&S ScopeSuite's test wizard.
2.3 Signal Quality Board
The signal quality board has several labeled sections designed for specific signal
quality testing. The connectors and their purpose are shown on Figure 2-2.
Signal Quality Board

Product Description
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Inrush
X1 X2
Trigger
X3 X4
X5 X6
Back Voltage Host Signal Quality
Disconnect
X7 X8
Receiver Sensitivity
X9 X10
Device SQ
X11 X12
Device
Initialization
Power
USB 2.0 Signal Quality Board
R
S
Test Init
56 Ohm 182
GND
D-
D- GND
D+ GND
GND
D+ B
A
B
B
A
A
A
A
A
B
B
B
B
Init Test
Device on off
Device on off
GND
D-
GND
D+
GND
D-
GND
D+
D- GND
D+ GND
D- GND
D+ GND
GND
D-
GND
D+
GND
GND
D-
D+
D-
D+
VBus
GND
D-
D- GND
D+ GND
GND
D+
VCC GND
GND
D-
D- GND
D+ GND
GND
D+
J1
D+
D-
Init
Test
Init
Test
int
ext
X13
High-speed tests Device Hub Host
- Signal quality x upstream
- Packet parameters x upstream x
- Chirp timing x upstream
- Suspend/resume/ x upstream
reset timing
- Test J/K, SE0_NAK x upstream
- Repeater up-/downstream
High-speed tests Hub Host
- Signal quality downstream x
- Chirp timing x
- Suspend/resume/reset x
- Test J/K, SE0_NAK downstream x
- Repeater up-/downstream
- Jitter downstream
High-speed tests Hub Host
- Disconnect detect x x
High-speed tests Device Hub
- Receiver sensitivity x upstream
Low and full speed tests: Device
Low and full speed tests: Hub
Low and full speed tests: Device, Hub
Figure 2-2: Signal quality board
Signal Quality Board

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Device Initialization switch
The device initialization switch at the bottom of the board is relevant for device
high speed signal quality and device high speed receiver sensitivity tests. The
current switch position - init or test - is indicated by LEDs in the relevant test sec-
tions.
Power jumper
An external power supply is only required for testing DUTs that need more than
420 mA supply current. For tests using additional power supply, set the jumper in
the "Power" section to "ext".
For all devices that need less than 420 mA supply current, the VBUS power from
the host is sufficient, and the jumper position is "int".
J1 jumper
The J1 jumper switches the inrush current measurement between current mea-
surement and voltage measurement. It is located in the "Inrush" section, the
upper section of the board.
J1
Upper position: A measuring resistance of 0.1 Ω is active.
You can measure the voltage using a differential probe and calculate the cur-
rent consumption.
J1
Lower position: The measuring resistance is shorted-out. To measure the cur-
rent consumption, you need a current probe.
SMA connectors
To perform hi-speed device and hub receiver sensitivity tests, a waveform gener-
ator is required. The SMA connectors for the generator connection are located in
the "Receiver Sensitivity" section of the board.
2.4 Load Board
The load board has 12 USB type B connectors for load testing and a section for
clocked droop testing.
Load Board

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USB 2.0 Load Board
R
S
Load 7
B
100 mA
500 mA
Load 8
B
100 mA
500 mA
Load 9
B
100 mA
500 mA
Load 10
B
100 mA
500 mA
Load 11
B
100 mA
500 mA
Load 12
B
100 mA
500 mA
Load 5
B
100 mA
500 mA
Load 6
B
100 mA
500 mA
Load 3
B
100 mA
500 mA
Load 4
B
100 mA
500 mA
Load 1
B
100 mA
500 mA
Load 2
B
100 mA
500 mA
Droop
B
Power
B
GND
OSC
Warning Hot Surface
Figure 2-3: Load board
Load Board

Connecting the Board
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Risk of burning caused by hot load board
The load board gets hot during testing. To avoid injuries:
●Do not touch the board when a test is running.
●After finishing the tests, set all switches to their middle position and wait
at least 5 min until the module cools down.
●Touch the board only at switches and edges. Do not touch the surface of
the board.
3 Connecting the Board
The appropriate DUT and probe connection depends on the test case. The
R&S ScopeSuite software provides a step-by-step guide that shows the required
setup for each test case.
The test preparation and measurements of the test cases are described in the
"R&S®RTO-K21, R&S®RTP-K21 USB 2.0 Compliance Tests, Test Procedures"
manual.
4 Test Equipment
For USB 2.0 compliance tests, the following test equipment is recommended:
●R&S RTP, or R&S RTO oscilloscope with 4 channels and at least 2 GHz band-
width. For full speed and low speed compliance tests, a 4-channel R&S RTO
with less than 2 GHz bandwidth is sufficient.
●R&S RT-ZF1 USB 2.0 compliance test fixture set, which consists of the load
board and the signal quality board.
●Probes:
– 2x single-ended active probes with at least 2 GHz bandwidth
– 1x differential active probe with at least 2 GHz bandwidth

Test Equipment
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●Tabor WX2182B / Tabor WX2182C arbitrary waveform generator for automatic
receiver sensitivity tests.
For manual receiver sensitivity tests, any AWG with at least 1.44 Gsample/s
can be used.
●R&S ScopeSuite software, which can be installed on a computer or directly on
the R&S RTO/R&S RTP.
●R&S RTO/R&S RTP-K21 USB 2.0 compliance test option (required option,
installed on the R&S RTO/R&S RTP)
●Make sure that you use the latest version of the USBHSET tool. To find down-
loads, search for USBHSET on the following websites:
– USB 3.0 host: www.usb.org/developers/tools/
– USB 2.0 host: www.usb.org/developers/tools/usb20_tools/
Regularly check the USB-IF website compliance.usb.org/index.asp?Update-
File=Electrical&Format=Standard for USB-IF compliance updates.