Sweep frequency with NI 5673E

Hello! I'm want use NI 5673E generator. In the examples I found the "frequency sweep" example for 5673E.
My question is: what is the maximum speed of the generator can sweep. How to estimate time the frequency sweep program? For example, I have the frequency range from 2 GHz to 3 GHz, step 1 MHz. How long will it take?How much is the shortest time it can
sweep the frequency with step = 1 MHz, 0.1MHz? Milliseconds, microseconds can nanosecond?
Solved!
Go to Solution.

Hello,
Using RF List Mode on your PXIe-5673E will be the most efficient approach for your sweeping application. The smallest step time you can get is 5 us on this hardware. However, the speed at which you sweep should be a factor of your specific requirements, such as frequency and power accuracy (more tuning time needed for better performance). Larger step sizes will require more tuning time for equivalent performance. It is also worth noting that the maximum amount of steps (limited by onboard memory) in List Mode is 250. This means that you'd need to reconfigure your sweep after 250 MHz (1 MHz/step * 250 steps) in software. At that point, your total sweep time will be a function of your computer performance.
I would recommend you take a look at the PXIe-5673E's specifications starting on page 5 to read about tuning times. Also, here is a link to the deprecated documentation we have online for RF List Mode:
Configuration List - http://zone.ni.com/reference/en-XX/help/371025K-01/TOC112.htm
For the most up to date and complete documentation on RF List Mode, please refer to your computer's RFSG help documentation.
Regards,
Chris E.
Applications Engineer
National Instruments
http://www.ni.com/support

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Hello,
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.mrLeft{float:left} .mrInfo{border-left:solid 1px #989898;font-size:x-small;color:#989898}
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Any sample code available?
Thanks.

Hi,
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Need HELP! Sweep frequency using Sound and Vibration Assistant

Hi,
I'm new to LabView . I want to do frequency sweep test using Sound and Vibration Assistant. I added the sweep step and chose sin wave frequency as the parameters. I selected frequency from 1K hz to 10k hz with an increment of 500hz.
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Thank you for your reply!
I am using a shaker connected to the amplifier. Attached please find the plots.
Lena
Attachments:
2015-03-27 17.16.47.jpg ‏2650 KB
2015-03-27 17.13.52.jpg ‏2657 KB
2015-03-27 17.17.23.jpg ‏2326 KB

How to measure and log frequency with fieldpoint CTR

Hi,
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2321
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2400
0
2521
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How to run at a frequency with labview under linux....

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thanks Isabelle for your reply...
j'ai beau changé le VI pour controller le temps, mais cela n'arrange rien. je ne sais pas si en anglais je suis tres clair... en fait ... si je ne ne controlle pas le temps avec un VI style wait ou wait *ms, ou bien encore la boite de dialogue la frequence est de 250 Hz....
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je travaille avec la version 7.0 installé a partir du CD grace aux RPM sous une mandrake 9.2...
si quelqu'un a connu les memes deboire que moi qu'il me contacte....lol
a+ merci
juju

Can't set max\min frequencies with CPUpower

Hi all ! And happy easter to everyone !
I'm having a problem with CPU Frequency Scaling... I want to set maximum and minimum frequencies according to mi CPU specs, but I'm unable to do this.
Well, starting from the beginning :
I've a Samsung NP535U3C laptop, with and AMD A6-4455 APU. I've two boost pstates, in fact TurionPowerControl tells to me
[alastor@NP535U3C ~]$ sudo TurionPowerControl -l
TurionPowerControl 0.44-rc2 (export)
Turion Power States Optimization and Control - by blackshard
Main processor is Family 15h (Bulldozer/Interlagos/Valencia) Processor
Family: 0xf Model: 0x0 Stepping: 0x1
Extended Family: 0x15 Extended Model: 0x10
Package Type: 0x0 BrandId: 0x0
Machine has 1 nodes
Processor has 1 cores
Processor has 7 p-states
Processor has 2 boost states
Power States table:
-- Node: 0 Core 0
core 0 pstate 0 (pb0) - En:1 VID:80 FID:10 DID:0.00 Freq:2600 VCore:0.5500
core 0 pstate 1 (pb1) - En:1 VID:80 FID:7 DID:0.00 Freq:2300 VCore:0.5500
core 0 pstate 2 (p0) - En:1 VID:90 FID:5 DID:0.00 Freq:2100 VCore:0.4250
core 0 pstate 3 (p1) - En:1 VID:96 FID:2 DID:0.00 Freq:1800 VCore:0.3500
core 0 pstate 4 (p2) - En:1 VID:108 FID:14 DID:1.00 Freq:1500 VCore:0.2000
core 0 pstate 5 (p3) - En:1 VID:114 FID:10 DID:1.00 Freq:1300 VCore:0.1250
core 0 pstate 6 (p4) - En:0 VID:116 FID:2 DID:1.00 Freq:900 VCore:0.1000
--- Node 0:
Processor Maximum PState: 6
Processor Startup PState: 4
Processor Maximum Operating Frequency: 2600 MHz
Minimum allowed VID: 123 (0.0125V) - Maximum allowed VID 0 (1.5500V)
Processor AltVID: 58 (0.8250V)
Done.
This is confirmed also by cpupower :
[alastor@NP535U3C ~]$ sudo cpupower frequency-info
analisi della CPU 0:
modulo acpi-cpufreq
CPU che operano alla stessa frequenza hardware: 0 1
CPU che è necessario siano coordinate dal software: 0
latenza massima durante la transizione: 4.0 us.
limiti hardware: 1.30 GHz - 2.10 GHz
frequenze disponibili: 2.10 GHz, 1.80 GHz, 1.50 GHz, 1.30 GHz
gestori disponibili: conservative, ondemand, performance
gestore attuale: la frequenza deve mantenersi tra 1.30 GHz e 2.10 GHz.
Il gestore "ondemand" può decidere quale velocità usare
in questo intervallo.
la frequenza attuale della CPU è 1.50 GHz (ottenuta da una chiamata diretta all'hardware).
boost state support:
Supported: yes
Active: yes
Boost States: 2
Total States: 7
Pstate-Pb0: 2600MHz (boost state)
Pstate-Pb1: 2300MHz (boost state)
Pstate-P0: 2100MHz
Pstate-P1: 1800MHz
Pstate-P2: 1500MHz
Pstate-P3: 1300MHz
Pstate-P4: 900MHz
So, my question is, why the ondemand governor can switch only between 2.10GHz and 1.3Ghz ? Should'nt switch between 2.6Ghz and 900MHz ?
I've tried to set lower frequency to 900 MHz whit the command :
cpupower frequency-set -d 900MHz
but nothing changed, the lower frequency still remained 1.3Ghz
I've also tried to set the maximum and minimum frequencies in /etc/default/cpupower :
# Define CPUs governor
# valid governors: ondemand, performance, powersave, conservative, userspace.
governor='ondemand'
# Limit frequency range
# Valid suffixes: Hz, kHz (default), MHz, GHz, THz
min_freq="900MHz"
max_freq="2600MHz"
# Specific frequency to be set.
# Requires userspace governor to be available.
# Do not set governor field if you use this one.
#freq=
# Utilizes cores in one processor package/socket first before processes are
# scheduled to other processor packages/sockets.
# See man (1) CPUPOWER-SET for additional details.
#mc_scheduler=
# Utilizes thread siblings of one processor core first before processes are
# scheduled to other cores. See man (1) CPUPOWER-SET for additional details.
#smp_scheduler=
# Sets a register on supported Intel processore which allows software to convey
# its policy for the relative importance of performance versus energy savings to
# the processor. See man (1) CPUPOWER-SET for additional details.
#perf_bias=
# vim:set ts=2 sw=2 ft=sh et:
but again, nothing canged.
I've tried ondemand and userspace governors but the situation is the same whit both of them, I always get hardware limits 1.30 - 2.10 GHz.
I've also tried to set the processor.ignore_ppc=1 boot flag, but it was selfish.
Someone could help me ? At least to set the lower frequacy to 900MHz so I can save a bit of battery.
Thank you.

Hi ! And thank you for your reply !! I'm always on conservative when I'm on battery to save some power. At this point I think I should report the problem to AMD. However here is my /proc/cpuinfo :
[alastor@NP535U3C ~]$ cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 21
model : 16
model name : AMD A6-4455M APU with Radeon(tm) HD Graphics
stepping : 1
microcode : 0x6001119
cpu MHz : 1300.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 16
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core arat cpb hw_pstate npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold bmi1
bogomips : 4193.77
TLB size : 1536 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro
processor : 1
vendor_id : AuthenticAMD
cpu family : 21
model : 16
model name : AMD A6-4455M APU with Radeon(tm) HD Graphics
stepping : 1
microcode : 0x6001119
cpu MHz : 1300.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 1
apicid : 17
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core arat cpb hw_pstate npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold bmi1
bogomips : 4193.77
TLB size : 1536 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro

Counter to measure frequency with multiple channels (Analog In/Out) in one vi

Hi,
I am using DAQ 6062E. I have multiple channels: an Analog In, Analog Out, Count Edges, and Count Frequencies. Without Count Frequency, the program works fine, I have defined a Sample Clock for each channel and then a common sampling rate. When I add Count frequency channel, I am not able anymore to use Sample Clock, since I get an error that Sample Clock can not be used, and if I change the Sample clock of the Count frequency to Implicit, then I can not connect different channels with a same sampling rate. In the attached file, if the Count Frequency is not connected to any Sample clock and sampling rate, the program works, but now I can not run the program for more than 5-10 Hz sampling rate, otherwise I get the error: 209802 “occurred at DAQmx wait for next sample clock, slow down the sample clock”. Does anybody know how to fix this problem?
Thanks a lot,
Azadeh
Attachments:
multiple channel.jpg ‏117 KB

Hi Otis,
Thanks for looking at the problem. I ran just two counters in a same vi. I was not able to use the Sample Clock since I needed to define an external sample clock source. The vi is attached. I could run this vi fast (200Hz). So, I am not sure why when two counters are combined with AI/AO the rate is very slow. I have attached three vi(s). Just two counters, AI/AO/1 counter, and AI/AO/2 Counters vis. I am able to run the vis in 200 Hz except the vi with AI/AO/2 counters (maximum sampling rate 20Hz). I appreciate if you can look at it if I am missing something.
Thanks,
Azadeh
Attachments:
AI_AO_2 Counter.vi ‏153 KB
2 Counter.vi ‏61 KB
AI_AO_1 counter.vi ‏138 KB

Can I measure frequency with a SCXI-1120 module and SCXI-1320 terminal block?

I am attempting to measure a square wave from a directional encoder to display RPM of a dynamometer. The waveform will have a frequency of 0-4KHz, with 3.6KHz being nominal, at about 5volts RMS. How can I measure the frequency of this waveform with the hardware I am currently using? In addition to what is listed above, I am using a PCI6034E GPIB card and LabView software.

In order to measure frequency, I would not recommend to use the SCXI-1120, but the SCXI 1126, which is a programmable isolated F-to-V module.
If by any reason you do not want to use SCXI-1126, then I would suggest to use the counter/timers of your board. The counter/timers are TTL compatible, and are the devices that we mostly recommend for doing precise frequency measurements.
In order to have access to the counter/timers of your board through your SCXI chassis, you will need SCXI-1180, which is basically a feedtrhough panel for your DAQ board.
Once we have access to the counter/timers through the SCXI chassis, we can proceed with the coding.
I found a pretty good webpage that clearly explains how to perform frequency measurement with the DAQ-S
TC counter/timers (DAQ-STC is the type of counter/timer chip that you DAQ device has). Here is the link to it:
Pulse Width & Frequency Measurements
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Can anyone give me a LabView program to do impedance spectroscopy (capacitance-frequency) with a HP4284 LRC interfaced to a probe station?

I am trying to measure the frequency dependent dielectric function of some polymer systems. Our group has a HP4284 LCR meter interfaced to a probe station, however we lack the LabView code to perform frequency dependent capacitance measurements (i.e. electrical impedance spectroscopy). Any help is much appreciated. Cheers!
-Kwami

First, study the manual and learn how to do a measurement manually. Then, download the driver (LabVIEW Tools>Instrumenation>Find Instrument Drivers), install the project style driver. Next, look at the LabVIEW examples for it (Help>Find Examples>Hardware Input and Output>Instrument Drivers>LabVIEW Plug and Play). Study the functions in the driver with Context Help turned on. Look at the block diagrams to see what commands in the manual each function implements. Decide which functions/commands are necessary to duplicate your manual test.

Measuring Low Frequencies with LabVIEW and FieldPoint Using [c]FP-CTR-500/502

I am trying to use this example in a LabView 8.0 and a Field Point FP-CTR-502 module but without any sensor I get frequency and period values.
Is that possible to use this example with LabView 8.0 or not?
I am trying to use an anemometer Campbel Scientific A100R.
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3ED7556A4E034080020E74861&p_node=174404&p_source=External
Attachments:
Low_Frequency_Measurement_CTR_LV71.vi ‏193 KB

You can launch MAX from start\programs\National Instruments\Measurement & automation.
Concerning source signal wiring, you can have a look to the following link : http://zone.ni.com/devzone/conceptd.nsf/webmain/01F147E156A1BE15862568650057DF15?opendocument
Hope this helps,
Manuel R
AE dans une autre vie

Sweep frequency with NI 5673E

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