SIGLENT TECHNOLOGIES SAP2500D User manual

SAP2500D
Differential Probe
User Manual
EN01A

SAP2500D Differential Probe User Manual 1
CONTENTS
1SAFETY INSTRUCTIONS.................................................................................................................................... 2
1.1 SYMBOLS............................................................................................................................................................ 3
1.2 OPERATING ENVIRONMENT............................................................................................................................... 3
1.3 CALIBRATION...................................................................................................................................................... 4
1.4 CLEANING ........................................................................................................................................................... 4
1.5 ABNORMALITIES ................................................................................................................................................. 4
2FIRST STEPS.......................................................................................................................................................... 6
2.1 DELIVERY CHECKLIST........................................................................................................................................ 6
2.2 FUNCTIONAL CHECK .......................................................................................................................................... 6
2.3 QUALITY ASSURANCE........................................................................................................................................ 8
2.4 MAINTENANCE AGREEMENT.............................................................................................................................. 8
3MECHANICAL DIMENSION................................................................................................................................ 9
4ACCESSORIES....................................................................................................................................................10
5PROBE OPERATION..........................................................................................................................................14
5.1 CONNECTING THE PROBE TO AN OSCILLOSCOPE..........................................................................................14
5.2 CONNECTING THE PROBE TO THE TEST CIRCUIT ..........................................................................................14
6SPECIFICATIONS................................................................................................................................................16

2SAP2500D Differential Probe User Manual
1 Safety Instructions
Carefully read the following safety precautions to avoid personal injury and
prevent damage to the instrument and any products connected to it. To avoid
potential hazards, please use the instrument as specified.
This section contains instructions that must be observed to keep this
oscilloscope accessory operating in a correct and safe condition. You are
required to follow generally accepted safety procedures in addition to the
precautions specified in this section. The overall safety of any system
incorporating this accessory is the responsibility of the assembler of the
system.
Connect and disconnect properly. Connect the probe to the measurement
instrument before connecting the test leads to a circuit/signal being tested.
Use only within the operational environment listed. Do not use in wet or
explosive atmospheres.
Ground the product. This product is indirectly grounded through the
grounding conductor of the mainframe power cord. To avoid electric shock, the
grounding conductor must be connected to the earth ground. Before making
connections to the input or output terminals of the product, ensure that the
product is properly grounded.
Use indoors only.
Keep product surfaces clean and dry.
Be careful with sharp tips. The tips may cause bodily injury if not handled
properly.

SAP2500D Differential Probe User Manual 3
Do not operate with suspected failures. Do not use the probe if any part is
damaged. Cease operation immediately and sequester the probe from
inadvertent use.
1.1 Symbols
These symbols may appear on the probe body or in this manual to alert you to
important safety considerations.
CAUTION. Potential for damage to probe or instrument it is
connected to. Attend to the accompanying information to protect
against personal injury or damage. Do not proceed until conditions
are fully understood and met
1.2 Operating Environment
The accessory is intended for indoor use and should be operated in a clean,
dry environment. Before using this product, ensure that its operating
environment is maintained within these parameters:
Temperature：5°C to 40°C.
Humidity：The maximum relative humidity is 80 % for temperatures up to
30 °C decreasing linearly to 50 % relative humidity at 40°C.
Altitude：Up to 10,000 ft (3,048 m).

4SAP2500D Differential Probe User Manual
WARNING: Do not operate this product in explosive, dusty or humid
air.
CAUTION: Do not exceed the specified maximum input voltage.
See technical data for details.
1.3 Calibration
The recommended calibration interval is one year from the time the probe is
put into service.
1.4 Cleaning
The exterior of the probe and cable should be cleaned, using a soft cloth
moistened with water. The use of abrasive agents, strong detergents, or other
solvents may damage the probe. Always ensure that the input leads arefree of
debris.
CAUTION: The probe case is not sealed and should never be
immersed in any fluid.
1.5 Abnormalities
This probe should only be used for the purpose specified by the manufacturer.
The probe may be damaged when it exhibits visible damage or is subjected to

SAP2500D Differential Probe User Manual 5
severe transportation pressure. If you suspect that the probe is damaged,
immediately disconnect the probe from the oscilloscope. To use the probe
correctly, all instructions and markings should be read carefully.
WARNING: Using the probe in a manner not specified by the
manufacturer may damage the probe. This probe and related
accessories should not be directly connected to the human body or
used for patient monitoring.

6SAP2500D Differential Probe User Manual
2 First Steps
2.1 Delivery Checklist
First, verify that all items listed on the packing list have been delivered. If you
note any omissions or damage, please contact your nearest SIGLENT
customer service center or distributor as soon as possible. If you fail to contact
us immediately in case of omission or damage, we will not be responsible for
replacement.
Figure 1 SAP2500D Differential Probe
2.2 Functional Check
The function check needs to use an oscilloscope that supports the SIGLENT
SAPBus interface. This is currently the SIGLENT SDS5000X and SDS6000A
series of oscilloscopes. Please follow the steps below to check the probe

SAP2500D Differential Probe User Manual 7
function.
1. Turn on the oscilloscope and warm-up for 20 minutes.
2. Connect the active probe to channel 1 of the oscilloscope.
3. Open the parameter bar of channel 1 and check the probe information,
including probe model, serial number, bandwidth, impedance, capacitance
and attenuation ratio.
4. Select the channel to which the probe is connected. Set the oscilloscope
scale factor to 1 V/div. Set the oscilloscope offset factor to 0 V.
5. Measure the average voltage of channel 1, and the reading range should
be within ±(1.5%* full-screen reading +10 mV). If the reading is beyond
the range, the check will not pass.
6. Change the scale factor of channel 1 to 500 mV/div, 200 mV/div, 100
mV/div, 50 mV/div, 20 mV/div, 10 mV/div, and repeat Step 5 to check the
average voltage reading at each scale.

8SAP2500D Differential Probe User Manual
2.3 Quality Assurance
Probes and accessories have a 1-year warranty from the date of shipment,
during normal use and operation. SIGLENT can repair or replace any product
that is returned to the authorized service center during the warranty period. We
must first examine the product to make sure that the defect is caused by the
process or material, not by abuse, negligence, accident, abnormal conditions,
or operation.
SIGLENT shall not be responsible for any defect, damage, or failure caused by
any of the following:
a) Attempted repairs or installations by personnel other than SIGLENT.
b) Connection to incompatible devices/incorrect connection.
c) For any damage or malfunction caused using non-SIGLENT supplies.
Furthermore, SIGLENT shall not be obligated to service a product that has
been modified. Spare, replacement parts, and repairs have a 90-day
warranty.
2.4 Maintenance Agreement
We provide various services based on maintenance agreements. We offer
extended warranties as well as installation, training, enhancement and on-site
maintenance, and other services through specialized supplementary support
agreements. For details, please consult your local SIGLENT customer service
center or distributor.

SAP2500D Differential Probe User Manual 9
3 Mechanical Dimension
Characteristic
Description
SAPBus interface
box
115.0 mm ×38.9 mm ×24.5 mm
Probe head
100.0 mm x 12.0 mm x 10.0 mm
Tip Pitch
2.54mm
Cable length
1.3 m (from the probe head to the compensation box)

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4 Accessories
The SAP2500D Differential probes are provided with numerous features and
accessories to make probing and connecting to different test points easier than
ever.
Standard Accessory
Part Number
Quantity
Unit
Straight Tip
2.74.70.12.003
5
pcs
Pogo Tip
2.74.70.12.004
5
pcs
Swivel Tip
2.74.70.10.018
2
pcs
Tip Saver
2.74.70.10.019
2
pcs
Y Lead Adapter
2.52.42.11.026
2
pcs
Right Angle Pin Lead 5 cm
2.52.42.11.016
1
pcs
Straight Pin Lead 6 cm
2.52.42.11.017
1
pcs
Straight Pin Lead 12 cm
2.52.42.11.019
1
pcs
Spring-loaded Ground (Short)
2.52.42.11.025
2
pcs
Spring-loaded Ground (Long)
2.52.42.11.028
2
pcs
Solder-in Lead
2.52.42.11.027
2
pcs
Channel ID Clips
(Set of 4 colors)
2.75.23.10.003
1
set

SAP2500D Differential Probe User Manual 11
Figure 2 Accessories
Straight Tip (Part Number 2.74.70.12.003)：The straight tip is rugged and
designed for general probing. Fits in either probe socket.
Pogo Tip (Part Number 2.74.70.12.004)：The pogo tip provides z axis
compliance. The tip can fit into a socket or via and onto an IC leg.
Swivel Tip (Part Number 2.74.70.10.018)：The swivel tip adapter features
adjustable tip spacing to reach test points. A 20 Ω damping resistor is included
to reduce inductive peaking.
Tip Saver (Part Number 2.74.70.10.019)：To prevent wear out on the probe

12 SAP2500D Differential Probe User Manual
input leads.
Y Lead Adapter (Part Number 2.52.42.11.026)：This lead is used for both
ground and input lead simultaneously. It has two sockets on one end and two
square pins on the other and may be used for general purpose probing.
Straight Pin Leads (Part Number 6 cm 2.52.42.11.017 / 12 cm
2.52.42.11.019)：These leads have a socket on one end and a square pin on
the other to connect to the input or ground socket of the probe body, and may
be used for general purpose probing.
Right Angle Pin Leads (Part Number 2.52.42.11.016): These leads have a
socket on one end with a right angle and a square pin on the other to connect
to the input or ground socket of the probe body, and may be used for general
purpose probing.
Spring-loaded Ground (Part Number Short 2.52.42.11.025 / Long

SAP2500D Differential Probe User Manual 13
2.52.42.11.028): Spring-loaded ground leads are bendable. They are designed
to be attached to the offset ground socket or be attached to either socket of the
probe head.
Solder-in Lead (Part Number 2.52.42.11.027)：This lead is designed to be
soldered directly to the test points for a secure connection. A damping 56.2 Ω
resistor is included to reduce inductive peaking.
Channel ID Clips (Part Number 2.75.23.10.003)：They are used to distinguish
the oscilloscope channel that the probe is connected to.

14 SAP2500D Differential Probe User Manual
5 Probe Operation
The SAP series probe is a precision test instrument accessory. Exercise care
when handling and storing the probe. Always handle the probe by the probe
body or compensation box. Avoid putting excessive strain or exposing the
probe cable to sharp bends.
ESD Sensitive: The tips of the probes are sensitive to Electrostatic
Discharge (ESD). Avoid causing damage to the probe by always following
anti-static procedures (wear wrist strap, etc.) when using or handling the
probe.
5.1 Connecting the Probe to an Oscilloscope
The SAP2500D differential probes have been designed for use with Siglent’s
SDS5000X and SDS6000A platforms equipped with the SAPBus interface.
When you attach the probe output connector to the oscilloscope’s input
connector, the oscilloscope recognizes the probe and provides proper
termination.
5.2 Connecting the Probe to the Test Circuit
To maintain the high-performance capability of the probe in measurement
applications, care must be exercised in connecting the probe to the test circuit.

SAP2500D Differential Probe User Manual 15
Increasing the parasitic capacitance or inductance in the input paths may
introduce a “ring” or slow the rise time of fast signals. Input leads that form a
large loop area will pick up any radiated electromagnetic field which passes
through the loop and may induce noise into the probe input.
Using one of the available accessories makes the SAP2500D probe with its
small profile and low mass head ideally suited for applications in dense
circuitry.
The amplifier inside the probe has a limited linear working range. To ensure
that the input linearity error is less than 3%, the amplitude of the input signal
needs to be limited to ±4 V. The probe has a DC offset adjustment function,
which can adjust the DC offset to eliminate the DC component in the test signal
and maximize the performance of the probe. The DC offset adjustment range
is ±8 V.

16 SAP2500D Differential Probe User Manual
6 Specifications
The SAP2500D is a compact, high impedance differential probe designed to
meet today’s increasing demand for measurements on a variety of test points.
With low input capacitance and high input resistance, circuit loading is
minimized.
With the SAPBus interface, the SAP2500D becomes an integral part of the
oscilloscope measurement circuit. The probe can be controlled from the
oscilloscope’s front panel. The oscilloscope provides power to the probe, so
there is no need for a separate power supply or batteries.
Key Benefits
Bandwidth
DC ~ >2.5 GHz
100 kΩSingle-ended Input Resistance
200 kΩDifferential Input Resistance
10X Attenuation
1 pF Differential Input Capacitance
±4 Volts Dynamic Range with ±8 Volts offset capability
SAPBus interface

SAP2500D Differential Probe User Manual 17
The specifications of the probe need to meet the following conditions:
1. The probe is within the validity period of calibration.
2. The ambient temperature is within 25℃±5℃.
3. The probe is correctly connected to the oscilloscope.
4. The probe and oscilloscope are in a thermally stable environment, and the
probe and oscilloscope should be warmed up for at least 20 minutes.
Warranted characteristics:
Characteristics
SAP2500D
Bandwidth (probe only)
> 2.5 GHz
Bandwidth (with scope)
2 GHz (SDS6204A)
Differential Input capacitance
1 pF
Differential Input resistance
200 kΩ
Single-ended Input resistance
100 kΩ
Offset range
±8 V
Attenuation ratio (DC)
÷10
Offset accuracy
< 3%
DC gain accuracy
< 3%
Input dynamic range
±4 V
Maximum input voltage
(non-destructive)
20 V
Cable length
130 cm

18 SAP2500D Differential Probe User Manual
Figure 3 Typical system frequency response of the SAP2500D and an SDS6204A