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From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
11-17-2015 01:02 PM
Is it possible when using the NI PXI-5671 to generate an VHF-FM signal to use modulation rates below 1 kHz and up to 150 kHz, internally or externally?
If so, how hi and low can the mod rate frequency be set. the Data sheet only refers to 1 kHz...
Will this Vector Generator accept external modulation inputs?
11-19-2015 06:17 PM
The PXI-5671 can only use 1 kHz as the modulation rate.
Can you further describe what you mean by accepting external modulation inputs?
11-25-2015 07:15 AM
BT,
Thanks for responding and yes, I can describe ext. mod inputs.
Typically a BNC input jack (labeled: EXT MOD INPUT) is located on the front or back panel of signal generators that are capable of accepting external AM-FM-Pulse modulation signals. Again, the BNC(f) connector is an input jack on a signal generator where an external source (in some cases a function generator) output can be connected to introduce a modulation rate (in the case of FM) other than what the signal generator's internal circuitry is limited to. It usually is 1 kHz (mod. rate or tone). The external mod input typically allows for a greater modulation rate range (below and above 1 kHz) and voltage (level)
BTW: I'm interested in building a PXi system that will emulate three older 19-in rack mountable test instruments. They are:
IFR 2030 Signal Generator,
Boonton 8201 Modulation Meter
Hewlett-Packard 8904 Multifunction Synthesizer
I'm just not certain there are PXI modules available to replace the functionality of these units?
Thanks for responding.
VR,
trap2015
11-30-2015 08:48 AM
Thanks for the reply. The PXI-5671 is not capable of external modulation inputs as you are describing. For consultation on getting a PXI system set up that emulates your rack instruments, reach out to our sales engineering team. They will discuss important considerations for your application with you in addition to having a wide knowledge of our offerings that could replace your old set up. You can call (888) 280-7645.
Thanks,
J
12-01-2015 07:24 AM
Thanks J!!
have a great holiday season!
VR,
steve