NI 779465-01

PXI RF Signal Conditioning
NI PXI-5690, NI PXI-5691, NI PXI-5695 NEW!
Key Amplifier Features
◾◾ Up to +24 dBm maximum output power
◾◾ Up to 30 dB gain
◾◾ 0.5 dB gain resolution
◾◾ Typical noise figure <5 dB
◾◾ Both fixed and programmable
gain channels
Key Attenuator Features
◾◾ Up to 60 dB total attenuation
◾◾ 0.5 dB attenuation resolution
◾◾ 1.2:1 typical voltage standing
wave ratio (VSWR)
◾◾ Both fixed and programmable
attenuator channels
Operating System
◾◾ Windows 7/XP/2000/NT
Recommended Software
◾◾ LabVIEW
◾◾ LabWindows™/CVI
◾◾ C/C++/.NET
Driver Software (included)
◾◾ NI-5690
Overview
PXI RF Amplifiers
National Instruments PXI RF signal conditioning modules include low-noise/
PXI-5690 (2.5 GHz)
PXI-5691 (2.5 GHz)
PXI-5691 (6.6 GHz)
31 dB
28 dB
27 dB
high-gain amplifiers and programmable attenuators. You can use these 3U PXI
CH0 Gain
modules to optimize the dynamic range of PXI RF vector signal generators and
CH0 Noise Figure
5.5 dB
5 dB
4 dB
analyzers. The NI PXI-5690 is a 100 kHz to 3 GHz, two-channel programmable
CH0 P1dB
+18 dBm
+21 dBm
+21 dBm
amplifier and attenuator; the NI PXI-5691 is a 50 MHz to 8 GHz, two-channel
CH0 IP3 (TOI)
+23 dBm
+33 dBm
+33 dBm
programmable amplifier; and the NI PXI-5695 is a 50 MHz to 8 GHz, two-channel
CH0 Max Output Power
+20 dBm
+25 dBm
+25 dBm
programmable attenuator.
CH1 Max Gain
16 dB
28 dB
21 dB
CH1 Noise Figure
8 dB
5 dB
5 dB
CH1 P1dB
+16 dBm
+21 dBm
+21 dBm
You can use PXI programmable amplifiers with both RF signal generators and
CH1 IP3 (TOI)
+15 dBm
+33 dBm
+33 dBm
RF signal analyzers. When combined with RF vector signal generators, PXI RF
CH1 Max Output Power
+20 dBm
+25 dBm
+25 dBm
amplifiers enable high-power signal generation. For example, the PXI-5691 offers
Note: All values are typical results at either 2.5 or 6.6 GHz.
up to 28 dB of gain and a 1 dB compression point of +21 dBm. Using this module,
Table 1. PXI RF Programmable Amplifiers Comparison
RF Signal Conditioning Applications
you can extend the upper power range of your vector signal generator.
When used with RF vector signal analyzers, the same programmable
amplifiers can improve the noise floor of the measurement system. For example,
with a typical noise figure of 5 dB at 2.5 GHz, the PXI-5691 programmable
amplifier can be combined with the NI PXI-5663 RF vector signal analyzer to
measure signals down to -163 dBm/Hz.
With PXI programmable attenuators, you can improve the power accuracy of
your RF signal generator in lower power ranges. With an external attenuator,
you generate RF signals in the most accurate range of the signal generator and
attenuate the signal to the desired output power.
PXI-5690 RF Programmable
Amplifier/Attenuator
The PXI-5690 is a 100 kHz to 3 GHz, two-channel programmable amplifier and
attenuator with one fixed gain path and one programmable gain/attenuation
path. The combined paths offer up to 37 dB of total signal gain at 2.5 GHz when
signal paths are cascaded.
PXI RF Signal Conditioning
CH 0 IN
CH 0 OUT
PXI-5695 RF Programmable Attenuator
The PXI-5695 is a 50 MHz to 8 GHz, two-channel RF programmable attenuator
Step
Attenuator
Main Path
with one fixed attenuation path and one programmable attenuation path.
The combined paths can provide up to 70 dB of total attenuation at 2.5 GHz
CH 1 IN
CH 1 OUT
when cascaded.
Direct Path
Figure 1. PXI-5690 Block Diagram
Fixed
Attenuator
CH 0 IN
CH 0 OUT
Main Path
Direct Path
Step
Attenuator
selectable paths. The main path consists of a step attenuator followed by a fixed
CH 1 IN
CH 1 OUT
gain amplifier. The step attenuator is software programmable in 1 dB steps. In
Figure 3. PXI-5695 Block Diagram
Channel 0 functions as a fixed gain preamplifier with a typical gain of 30 dB
across all frequencies. This channel offers a low noise figure and a flat
frequency response.
Channel 1 functions as a programmable preamplifier containing two user-
software, you can configure channel 1 to provide up to 10 dB of attenuation or up
to 22 dB of gain – depending on frequency range. The direct path gives you the
option of bypassing the attenuator-amplifier circuitry.
PXI-5691 RF Programmable Amplifier
The PXI-5691 is a 50 MHz to 8 GHz, two-channel programmable amplifier with
one fixed gain path and one programmable gain path. The combined paths can
provide up to 55 dB of total signal gain at 2.5 GHz when the two channels
are cascaded.
Channel 0 functions as a fixed attenuator with more than 27.5 dB of
attenuation across all frequencies.
Channel 1 functions as a programmable attenuator with up to 42 dB
of attenuation across all frequencies. You can control this attenuator
programmatically in software with 0.5 dB resolution.
Software
You can programmatically control PXI-569x modules using NI-5690 programming
software. This driver provides C-style and NI LabVIEW APIs to help you control
CH 0 OUT
CH 0 IN
both gain and attenuation. A block diagram of a basic LabVIEW example to
control the PXI-5691 amplifier is shown in Figure 4.
Step
Attenuator
Main Path
CH 1 IN
Direct Path
CH 1 OUT
Figure 2. PXI-5691 Block Diagram
Channel 0 functions as a fixed gain preamplifier with a typical gain of more
than 26 dB across all frequencies. This channel offers a low noise figure and a
Figure 4. You can control PXI RF signal conditioning modules with NI LabVIEW software.
flat frequency response.
Channel 1 functions as a programmable preamplifier containing two userselectable paths. The main path consists of fixed gain amplification preceded
Ordering Information
by a step attenuator that is adjustable by software in 0.5 dB nominal steps. The
NI PXI-5690.....................................................................................779465-01
direct path gives you the option of bypassing the attenuator-amplifier circuitry.
NI PXI-5691.....................................................................................781035-01
NI PXI-5695.....................................................................................781036-01
BUY NOW
For complete product specifications, pricing, and accessory information,
call 800 813 3693 (U.S.) or go to ni.com/rf.
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2
PXI RF Signal Conditioning
NI PXI-5690 Specifications
11
Channel 0 (CH 0)
Main Path Specification
Gain calibration accuracy...................... ±0.4 dB1
Gain variation by temperature............... Less than -0.03 dB/°C
Noise Figure (dB)
10
9
8
7
6
5
4
Typical NF, CH 0
Maximum NF, CH 0
3
Maximum output power........................ +20 dBm
2
Output 1 dB compression....................... +18 dBm typical
1
0
Second harmonic at............................... +4 dBm, -40 dBc typical
Survival input power.............................. -10 dBm maximum
DC voltage at input................................ ±20 V maximum2
Under 500 kHz, ±1.5 dB. For all frequencies, degrades by ±0.03 dB/°C outside by 15 to 35 °C
temperature range.
2
Nondamaging for steady-state DC only. Direct path passes input DC level to output.
1
400M
800M
1.2G 1.6G 2.0G
Frequency (Hz)
2.4G
3.0G
Figure 6. Noise Figure (NF)
Channel 1 Performance, Main Path
26
Channel 1 (CH 1)
22
18
Main Path Specification
Gain calibration accuracy...................... ±0.4 dB
Gain variation by temperature............... Less than -0.03 dB/°C
Gain (dB)
14
1
Maximum output power........................ +20 dBm
10
6
2
–2
–6
Output 1 dB compression....................... +16 dBm typical
–10
Second harmonic at............................... +4 dBm, -40 dBc typical
–14
0
Survival input power.............................. +20 dBm maximum (with attenuation)
400M
DC voltage at input................................ ±20 V maximum2
Under 500 kHz, ±1.5 dB. For all frequencies, degrades by ±0.03 dB/°C outside by 15 to 35 °C
temperature range.
2
Nondamaging for steady-state DC only. Direct path passes input DC level to output.
800M
1.2G 1.6G 2.0G
Frequency (Hz)
2.4G
3.0G
Typical Gain Range, CH 1 Main Path
1
Minimum Gain Range, CH 1 Main Path
Figure 7. Programmable Gain Range
Direct Path Specification
Insertion loss calibration accuracy........ ±0.4 dB1
DC voltage at input................................ ±20 V maximum2
Under 500 kHz, ±1.5 dB. For all frequencies, degrades by ±0.03 dB/°C outside by 15 to 35 °C
temperature range.
2
Nondamaging for steady-state DC only. Direct path passes input DC level to output.
1
Channel 0 Performance
40
38
Typical Gain, CH 0
Minimum Gain, CH 0
36
Gain (dB)
34
Noise Figure (dB)
Survival input power.............................. +20 dBm maximum (with attenuation)
15
14
13
12
11
10
9
8
7
6
5
4
3
Typical NF, CH 1 Main Path
Maximum NF, CH 1 Main Path
0
400M
800M
1.2G 1.6G 2.0G
Frequency (Hz)
2.4G
3.0G
Figure 8. Noise Figure (NF)
32
30
28
26
24
22
20
0
400M
800M
1.2G 1.6G 2.0G
Frequency (Hz)
2.4G
3.0G
Figure 5. Gain
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3
PXI RF Signal Conditioning
NI PXI-5691 Specifications
Channel 1 (CH 1) Performance, Main Path
Variable level range............................... +31.5 dB
Channel 0 (CH 0) Performance, Main Path
Attenuation resolution........................... +0.5 dB typical
Level calibration accuracy..................... ±0.9 dB1
Level settling time................................. +4 μs maximum1
Absolute maximum input power
Level calibration accuracy..................... ±0.9 dB2
(no damage)....................................... +30 dBm typical
(7.1 Vrms, 10 V pk at 50 Ω)
Maximum reverse power
(no damage)....................................... +20 dBm maximum
(no damage)....................................... +25 dBm maximum
Maximum output power........................ +25 dBm maximum
DC voltage at input................................ ±10 V typical2
Gain variation by temperature............... (-1.18*10-12 * F ) – 0.01 in dB/°C3
F = Frequency in Hz
Valid for Tref ±5 °C. For temperatures other than Tref, the level calibration accuracy is valid after
applying the gain correction factor for Δ T.
2
DC coupled from input to output, but only calibrated from 50 MHz to 8 GHz.
3
Calculate the correction factor using the following equation:
Δ Gain = (Gain Variation by temperature) * Δ T
where Δ T = Tsensor – Tref
Tsensor = the temperature reading of the onboard temperature sensor in °C, as reported by
1
the ni5690 Get Temperature VI or the ni5690_getTemperature function Tref = 34 °C
36.0
DC voltage at input................................ ±10 V typical
Gain variation by temperature............... (-1.34*10-12 * F ) – 0.01 in dB/°C3
F = Frequency in Hz
The attenuator settling time is measured to 0.5 dB of final value when switching from minimum
to maximum attenuation. Achieving settling times closer to the final attenuation value may take
substantially longer.
2
Valid for Tref ±5 °C. For temperatures other than Tref, the level calibration accuracy is valid after
applying the gain correction factor for Δ T.
3
Calculate the correction factor using the following equation:
Δ Gain = (Gain Variation by temperature) * Δ T
where Δ T = Tsensor – Tref
Tsensor = the temperature reading of the onboard temperature sensor in °C, as reported by
the ni5690 Get Temperature VI or the ni5690_getTemperature function Tref = 34 °C
1
Max
Typical
Min
34.0
(7.1 Vrms, 10 Vpk at 50 Ω)
Maximum reverse power
Maximum output power
35.0
30.0
32.0
25.0
20.0
30.0
Gain (dB)
Gain (dB)
(no damage)....................................... +30 dBm typical
(no damage)....................................... +20 dBm maximum
Absolute maximum input power
28.0
26.0
15.0
10.0
5.0
0.0
–5.0
24.0
0.0
2.0
4.0
6.0
8.0
–10.0
–15.0
Frequency (GHz)
Max Gain
Min Gain
Limits
–20.0
Figure 9. Measured Gain
0.0
2.0
4.0
6.0
8.0
Frequency (GHz)
11.0
Figure 11. Measured Programmable Gain Range
10.0
9.0
8.0
NF (dB)
7.0
6.0
5.0
4.0
3.0
2.0
Max
Typical
1.0
0.0
10
50
100
1000
8000
Frequency (MHz)
Figure 10. Measured Noise Figure
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PXI RF Signal Conditioning
12.0
11.0
10.0
9.0
NF (dB)
8.0
7.0
6.0
5.0
4.0
3.0
2.0
Max
Typical
1.0
0.0
10
50
1000
100
8000
Frequency (MHz)
Figure 12. Measured Noise Figure
Channel 0/Channel 1 Cascaded Path Performance
60.0
55.0
50.0
Gain (dB)
45.0
40.0
CH 0 Main: CH 1 Max Gain
CH 0 Main: CH 1 Min Gain
35.0
30.0
25.0
20.0
15.0
0.0
2.0
4.0
6.0
8.0
Frequency (GHz)
Figure 13. Measured Cascaded Gain Response
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5
PXI RF Signal Conditioning
NI PXI-5695 Specifications
Channel 0 (CH 0) Performance, Main Path
Channel 1 (CH 1) Performance
Level calibration accuracy..................... ±0.7 dB1
Programmable Path Specifications
Maximum input power (operation)........ +33 dBm maximum
Variable attenuator range...................... 0 dB to +31.5 dB
(10 Vrms, 14 Vpk)
Attenuation resolution........................... +0.5 dB typical
Absolute maximum input power
Level calibration accuracy..................... ±0.7 dB1
(no damage)....................................... +33 dBm maximum
Attenuation settling time....................... +4 μs maximum2
Maximum reverse power
Maximum input power (operation)........ +27 dBm maximum
(no damage)....................................... +33 dBm maximum
DC voltage at input................................ ±10 V maximum2
Gain variation by temperature............... (-4.66*10-13 * F ) in dB/°C3
F = Frequency in Hz
Valid for Tref ±5 °C. For temperatures other than Tref, the level calibration accuracy is valid after
applying the gain correction factor for Δ T.
2
DC coupled from input to output, but only calibrated from 50 MHz to 8 GHz.
3
Calculate the correction factor using the following equation:
Δ Gain = (Gain Variation by temperature) * Δ T
where Δ T = Tsensor – Tref
Tsensor = the temperature reading of the onboard temperature sensor in °C, as reported by
1
the ni5690 Get Temperature VI or the ni5690_getTemperature function Tref = 26 °C
Attenuation (dB)
–27.0
–28.0
–29.0
–30.0
–31.0
–32.0
Absolute maximum input power
(no damage)....................................... +27 dBm maximum
Maximum reverse power
(no damage)....................................... +26 dBm maximum
Gain variation by temperature............... (-2.69*10-13 * F ) in dB/°C3
F = Frequency in Hz
Valid for Tref ±5 °C. For temperatures other than Tref, the level calibration accuracy is valid after
applying the gain correction factor for Δ T.
2
The attenuator settling time is measured to 0.5 dB of final value when switching from minimum
to maximum attenuation. Achieving settling times closer to the final attenuation value may take
substantially longer.
3
Calculate the correction factor using the following equation:
Δ Gain = (Gain Variation by temperature) * Δ T
where Δ T = Tsensor – Tref
Tsensor = the temperature reading of the onboard temperature sensor in °C, as reported by
1
Max
Typical
Min
–15.0
4.0
Frequency (GHz)
Figure 14. Measured Attenuation (Fixed Attenuator)
6.0
8.0
–20.0
Attenuation (dB)
2.0
the ni5690 Get Temperature VI or the ni5690_getTemperature function Tref = 26 °C
–10.0
–33.0
0.0
(5 Vrms, 7 Vpk)
–25.0
–30.0
–35.0
–40.0
–45.0
–50.0
Min Attn
Max Attn
Limits
–55.0
0.0
2.0
4.0
6.0
8.0
Frequency (GHz)
Figure 15. Measured Programmable Attenuation Range
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6
PXI RF Signal Conditioning
Channel 0/Channel 1 Cascaded Path Performance
–10.0
–20.0
Gain (dB)
–30.0
CH 0 Direct : CH 1 Min Attn
–40.0
CH 0 Main : CH 1 Max Attn
–50.0
–60.0
–70.0
–80.0
0.0
2.0
4.0
6.0
8.0
Frequency (GHz)
Figure 16. Cascaded Response
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