National Instruments USB-5683 User manual

SPECIFICATIONS
USB-5683
RF Power Sensor Device
Contents
Definitions.................................................................................................................................1
Conditions................................................................................................................................. 2
General...................................................................................................................................... 2
Uncertainty................................................................................................................................3
Power Measurement..................................................................................................................5
Continuous Mode......................................................................................................................5
Scope Mode...............................................................................................................................6
Time Slot Mode.........................................................................................................................6
Trigger.......................................................................................................................................7
Internal Trigger................................................................................................................. 7
Trigger In...........................................................................................................................7
Trigger Out........................................................................................................................7
Interface.................................................................................................................................... 8
Maximum Damage Levels........................................................................................................ 8
DC Power Requirements (5 V) from Host USB....................................................................... 8
Calibration.................................................................................................................................8
Physical Characteristics............................................................................................................ 8
Environment..............................................................................................................................9
Operating Environment.....................................................................................................9
Storage Environment.........................................................................................................9
Shock and Vibration..........................................................................................................9
Compliance and Certifications................................................................................................10
Safety.............................................................................................................................. 10
Electromagnetic Compatibility....................................................................................... 10
CE Compliance .............................................................................................................. 10
Online Product Certification........................................................................................... 11
Environmental Management........................................................................................... 11
Definitions
Warranted specifications describe the performance of a model under stated operating
conditions and are covered by the model warranty.

The following characteristic specifications describe values that are relevant to the use of the
model under stated operating conditions but are not covered by the model warranty.
•Typical specifications describe the performance met by a majority of models.
•Nominal specifications describe an attribute that is based on design, conformance testing,
or supplemental testing.
Specifications are Typical unless otherwise noted.
Conditions
Minimum or maximum specifications are warranted under the following conditions unless
otherwise noted.
• 1 hour warm-up time at ambient temperature
• Calibration cycle maintained
• Temperature 0 °C to 55 °C
General
Frequency range 10 MHz to 8 GHz
Input range -60 dBm to +20 dBm
VSWR
10 MHz to 150 MHz <1.17 : 1
>150 MHz to 2 GHz <1.12 : 1
>2 GHz to 8 GHz <1.22 : 1
Measurement range
Range 1 +4 dBm to +20 dBm, typical
Range 2 -16 dBm to <+4 dBm, typical
Range 3 -60 dBm to <-16 dBm, typical
Signal-channel bandwidth 50 kHz, typical
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Uncertainty
Absolute Power Measurement Uncertainty1
Table 1. Measurement Uncertainty (dB), 0 °C to 50 °C
Power Measured (dBm)
Frequency (GHz)
≤0.05 >0.05 to 2 >2 to 8
-60 to <-16 0.14 0.14 0.14
-16 to <+4 0.14 0.14 0.13
+4 to +20 0.14 0.15 0.15
Table 2. Measurement Uncertainty (dB), 20 °C to 30 °C
Power Measured (dBm)
Frequency (GHz)
≤0.05 >0.05 to 2 >2 to 8
-60 to <-16 0.13 0.12 0.14
-16 to <+4 0.11 0.10 0.13
+4 to +20 0.11 0.10 0.10
Relative Power Measurement Uncertainty2
Table 3. Measurement Uncertainty (dB), ≤0.05 GHz
Initial Power
Measured (dBm)
Final Power Measured (dBm)
0 °C to 50 °C 20 °C to 30 °C
+4 to +20 -16 to <+4 -60 to <-16 +4 to +20 -16 to <+4 -60 to <-16
-60 to <-16 0.14 0.13 0.03 0.08 0.09 0.03
-16 to <+4 0.14 0.04 0.13 0.06 0.03 0.09
+4 to +20 0.05 0.14 0.14 0.05 0.06 0.08
1Expanded uncertainty with k = 2 for a CW measurement after zeroing. Includes calibration factor
and linearity; noise, zero set, and drift must be added.
2Expanded uncertainty with k = 2 for measurement of a change in power of a CW signal after
zeroing. Includes calibration factor and linearity; noise, zero set, and drift must be added.
USB-5683 Specifications | © National Instruments | 3

Table 4. Measurement Uncertainty (dB), >0.05 GHz to 2 GHz
Initial Power
Measured (dBm)
Final Power Measured (dBm)
0 °C to 50 °C 20 °C to 30 °C
+4 to +20 -16 to <+4 -60 to <-16 +4 to +20 -16 to <+4 -60 to <-16
-60 to <-16 0.16 0.16 0.03 0.11 0.12 0.03
-16 to <+4 0.17 0.05 0.16 0.09 0.04 0.12
+4 to +20 0.06 0.17 0.16 0.06 0.09 0.11
Table 5. Measurement Uncertainty (dB), >2 GHz to 8 GHz
Initial Power
Measured (dBm)
Final Power Measured (dBm)
0 °C to 50 °C 20 °C to 30 °C
+4 to +20 -16 to <+4 -60 to <-16 +4 to +20 -16 to <+4 -60 to <-16
-60 to <-16 0.16 0.16 0.04 0.12 0.14 0.04
-16 to <+4 0.17 0.05 0.16 0.10 0.04 0.14
+4 to +20 0.06 0.17 0.16 0.07 0.10 0.12
Table 6. Noise, Zero Set, Zero Drift Uncertainty
Power Measured (dBm) Noise3Zero Set4Zero Drift5
-60 to <-16 <123 pW <332 pW <344 pW
-16 to <+4 <10.1 nW <38.7 nW <42.9 nW
+4 to +20 <0.856 μW <1.07 μW <0.996 μW
3Noise is specified as two-sigma (at three-sigma confidence) after zero operation when measured
with 10.2 seconds of measurement time (measurement time = Aperture Time * Number of
Averages). Effect of noise can be reduced by increasing the number of averages and/or increasing
the aperture time. Noise decreases at a rate equal to the square root of the number of averages and
aperture time.
4Zero set is specified as the mean (at three-sigma confidence) after zero operation when measured
with 256 averages and 40 ms aperture time for 1 hour, and when keeping the temperature within
±1 ºC.
5Zero drift is specified as two-sigma (at three-sigma confidence) after zero operation when
measured with 256 averages and 40 ms aperture time for 1 hour, and when keeping the
temperature within ±1 ºC.
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Table 7. Effects of Digital Modulation6
Power Measured (dBm) Uncertainty (dB)
-60 to <-16 +0.080/-0.048
-16 to <+4 +0.088/-0.038
+4 to +20 +0.067/-0.055
Power Measurement
Measurement Average power
Measurement resolution 0.01 dB maximum
Offset range -100 dB to +150 dB
Averaging
Averaging mode Auto, manual
Averaging type Moving, repeat
Number of averages (manual)71 to 65,536
Auto-averaging
Resolution81 dB, 0.1 dB, 0.01 dB
Source Time Slot mode: 1 to 128 slots; or Scope
mode: 1 to 16,384 data points
Continuous Mode
Duty cycle correction 0.001% to 100%
Aperture time 0.01 ms to 1 s
6Measurement error with reference to a CW signal of equal power and frequency at 20 ºC to 30 ºC.
7Maximum number of averages allowed in Continuous mode and Time Slot mode is 65,536. In
Scope mode, the maximum number of averages is equal to 16,777,216 divided by the number of
data points.
8Averaging resolution of 0.001 dB is not available with the NI-568x SFP. This feature is only
available when using the NI-568x instrument driver. Averaging resolution is defined as the place
after the decimal to which the reading becomes stable.
USB-5683 Specifications | © National Instruments | 5

Maximum buffer size 8,192
Measurement time9Up to 1,000 measurements per second,
unbuffered
More than 10,000 measurements per second,
buffered
Table 8. Measurement Time Examples
Aperture Time (ms) Averages = 1, in ms Averages = 10, in ms
0.01 1.0 1.5
0.1 1.2 3.0
1 4.0 19.1
10 34.6 187
100 347 1907
Scope Mode
Capture time 0.01 ms to 1 s
Data points 1 to 16,384
Resolution 0.01 ms maximum
Measurement time10 Capture Time * 6.2 + 0.013
Time Slot Mode
Maximum number of slots 128
Slot width 0.01 ms to 100 ms
Maximum capture time 1,000 ms (Slot Width * Number of Slots)
Resolution 0.01 maximum
9Times are typical based on benchmark results taken using an NI PXIe-8135 controller and an
USB-5683. Performance may vary based on system configuration. Trigger source set to Immediate.
Number of Averages = 1 for repeat average mode.
10 Times are typical based on benchmark results taken using an NI PXIe-8135 controller and an
USB-5683. Performance may vary based on system configuration. Trigger source set to Immediate.
Number of Averages = 1 for repeat average mode.
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Exclusion periods11
Start exclusion 0 ms to 10 ms
End exclusion 0 ms to 10 ms
Trigger
Internal Trigger
Source12 Bus or Continuous (Auto, Single or Multiple)
Range -35 dBm to +20 dBm
Level accuracy ±0.5 dB, typical
Slope Positive or negative
Delay range -5 ms to 10 s
Delay resolution 10 μs
Trigger In
Impedance 4 kΩ, nominal
Type TTL/CMOS
Slope Positive
Delay range -5 ms to 10 s
Delay resolution 10 μs
Voltage high threshold 2.3 V, typical
Voltage low threshold 1.2 V, typical
Hysteresis 0.2 V, typical
Maximum voltage ±5.5 V
Minimum pulse width 100 ns
Latency13 10.6 μs, maximum
Repetition period 14.2 μs, minimum
Trigger Out
Trigger Out capability is not currently implemented.
11 The start exclusion time plus the end exclusion time must be less than the slot width.
12 Software trigger not available in the NI-568x SFP. This feature is only available when using the
NI-568x instrument driver. Internal and external triggers are not available when using Continuous
acquisition mode.
13 Latency is defined as the time delay between the sensor receiving the trigger and the measurement
initiation.
USB-5683 Specifications | © National Instruments | 7

Interface
RF connector N (m)
Interface to host USB 2.0 full speed (compatible with USB 1.0
and USB 1.1)
External trigger input MCX(f)
Maximum Damage Levels
Maximum DC voltage at RF port ±20 V
Maximum power at RF port +30 dBm (+34 dBm for 10 μs pulse, 10% duty
cycle)
Maximum voltage at trigger input 5.5 V
DC Power Requirements (5 V) from Host USB
Typical current 450 mA
Caution You can impair the protection provided by the USB-5683 if you use it in a
manner not described in this document.
Calibration
Interval 1 year; calibration interval starts with the date
the product is put into service by the customer
Physical Characteristics
Dimensions 110 mm x 45 mm x 25.6 mm, excluding RF
connector and silicone cover
Weight 397 g (0.88 lb)
Caution Clean the hardware with a soft, nonmetallic brush. Make sure the
hardware is completely dry and free from contaminants before returning it to
service.
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Environment
Maximum altitude 4,600 m operational
Pollution Degree 2
Indoor use only.
Operating Environment
Ambient temperature range 0 °C to 50 °C (Tested in accordance with
IEC 60068-2-1 and IEC 60068-2-2.)
Relative humidity range14 (noncondensing)
At 50 °C 45%
At 40 °C 75%
At 30 °C 95%
Storage Environment
Ambient temperature range -40 °C to +71 °C (Tested in accordance with
MIL-PRF-28800F (Class 3).)
Relative humidity range 5% to 95%, noncondensing (Tested in
accordance with MIL-PRF-28800F (Class 3).)
Shock and Vibration
Operating shock 30 g peak, half-sine, 11 ms pulse (Tested in
accordance with IEC 60068-2-27. Meets
MIL-PRF-28800F Class 2 limits.)
Random vibration
Operating 5 Hz to 500 Hz, 0.3 grms
Nonoperating 5 Hz to 500 Hz, 2.4 grms (Tested in accordance
with IEC 60068-2-64. Nonoperating test
profile exceeds the requirements of
MIL-PRF-28800F, Class 3.)
14 Tested in accordance with IEC 60068-2-56.
USB-5683 Specifications | © National Instruments | 9

Compliance and Certifications
Safety
This product is designed to meet the requirements of the following electrical equipment safety
standards for measurement, control, and laboratory use:
• IEC 61010-1, EN 61010-1
• UL 61010-1, CSA 61010-1
Note For UL and other safety certifications, refer to the product label or the Online
Product Certification section.
Electromagnetic Compatibility
This product meets the requirements of the following EMC standards for electrical equipment
for measurement, control, and laboratory use:
• EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity
• EN 55011 (CISPR 11): Group 1, Class A emissions
• EN 55022 (CISPR 22): Class A emissions
• EN 55024 (CISPR 24): Immunity
• AS/NZS CISPR 11: Group 1, Class A emissions
• AS/NZS CISPR 22: Class A emissions
• FCC 47 CFR Part 15B: Class A emissions
• ICES-001: Class A emissions
Note In the United States (per FCC 47 CFR), Class A equipment is intended for
use in commercial, light-industrial, and heavy-industrial locations. In Europe,
Canada, Australia, and New Zealand (per CISPR 11), Class A equipment is intended
for use only in heavy-industrial locations.
Note Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical
equipment that does not intentionally generate radio frequency energy for the
treatment of material or inspection/analysis purposes.
Note For EMC declarations, certifications, and additional information, refer to the
Online Product Certification section.
CE Compliance
This product meets the essential requirements of applicable European Directives, as follows:
• 2014/35/EU; Low-Voltage Directive (safety)
• 2014/30/EU; Electromagnetic Compatibility Directive (EMC)
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Online Product Certification
Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance
information. To obtain product certifications and the DoC for this product, visit ni.com/
certification, search by model number or product line, and click the appropriate link in the
Certification column.
Environmental Management
NI is committed to designing and manufacturing products in an environmentally responsible
manner. NI recognizes that eliminating certain hazardous substances from our products is
beneficial to the environment and to NI customers.
For additional environmental information, refer to the Minimize Our Environmental Impact
web page at ni.com/environment. This page contains the environmental regulations and
directives with which NI complies, as well as other environmental information not included in
this document.
Waste Electrical and Electronic Equipment (WEEE)
EU Customers At the end of the product life cycle, all NI products must be
disposed of according to local laws and regulations. For more information about
how to recycle NI products in your region, visit ni.com/environment/weee.
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compliance, go to ni.com/environment/rohs_china.)
USB-5683 Specifications | © National Instruments | 11

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375192B-01 February 27, 2018