One of our customers requests a way to test a Differential Amplifier from 10 KHz to 6 GHz.
PNA with iTMSA is not valid for this as the lower-end is 10 MHz and a Hybrid with this multi-octave span is not realizable.
I was thinking I could tie two EXG's together with Option 012 (Phase Coherency) but this appears to be confined to the BW of the vector modulator from the literature. Not clear.
It does seem that associating the two EXG's with the 10 MHz reference input would not maintain a coherent phase relationship, instead only frequency locking. Is that correct?
Can a sweep from 10 KHz to 6 GHz with two vector EXG's made phase coherent be accomplished that provides the desired quadrature relationship between the 2 unit's outputs?
If Option 12 is not suitable for this purpose, is there a way to associate two EXG's of either vector or analog type to accomplish this quadrature-relationship swept behavior?
As an associated question, if this quadrature relationship can be established, would it be possible to sweep with any coherent phase relationship?
Thanks !
PNA with iTMSA is not valid for this as the lower-end is 10 MHz and a Hybrid with this multi-octave span is not realizable.
I was thinking I could tie two EXG's together with Option 012 (Phase Coherency) but this appears to be confined to the BW of the vector modulator from the literature. Not clear.
It does seem that associating the two EXG's with the 10 MHz reference input would not maintain a coherent phase relationship, instead only frequency locking. Is that correct?
Can a sweep from 10 KHz to 6 GHz with two vector EXG's made phase coherent be accomplished that provides the desired quadrature relationship between the 2 unit's outputs?
If Option 12 is not suitable for this purpose, is there a way to associate two EXG's of either vector or analog type to accomplish this quadrature-relationship swept behavior?
As an associated question, if this quadrature relationship can be established, would it be possible to sweep with any coherent phase relationship?
Thanks !
I can't use the Hybrid/Balun approach, as I mentioned in the first posting, because a Hybrid/Balun with this BW does not appear to be commercially available, and is probably not realizable.
The construction technologies used between 10 KHz and about 10 MHz are dramatically different than those used between 10 MHz and about 500 MHz and then between 500 MHz and about 6 GHz the technologies change again.
If you know of a 10 KHz to 6 GHz Balun/Hybrid, please point me to the vendor.
If you do not know where to obtain a Balun/Hybrid to make your recommendation viable, please answer my questions regarding the EXG functionality.
The benefit of the MCD signal generators is they do cover this frequency range, but 10 MHz reference frequency-locking does not produce relative phase-coherent output.
This is why I asked about the functionality of the Phase Coherency option.
It is not clear that the coherency occurs outside the BW of the internal modulation capability.
Two questions:
1. Do you need 2 EXG to generate CW waveform or with modulation ON? The EXG’s lowest frequency for vector mode is 5MHz, could not be 9kHz.
2. Do you need 2 EXG to sweep from 10kHz to 6GHz together with phase coherency?
Your answers may help me - help you
Regards -
1) As mentioned in the first message, I can use an Analog EXG, so modulation is not needed. CW tone only.
2) Correct, 10 KHz to 6 GHz with Phase Coherency.
So to anticipate any limitations the EXG's may have =
If there is a narrower span where phase coherency can be accomplished, it would be valuable to know the start/stop of the working span.
The phase relationship needs to be set by the user. Quadrature relationship is the minimum and if more than quadrature is provided what would be the increment in phase (degrees)?
We presume that constant amplitude would be maintained across the span, is this correct?
1. Analog EXG doesn't have phase coherency option so vector EXG is needed.
2. Vector EXG's phase coherency option could support 250MHz-6GHz frequency, not as low as 10KHz.
3. Phase relationship between two EXG could be ± 360.00 ° settable.
4. Amplitude could be constant across the span.
thanks
Something like phase abberations in the vector modulator below 250 MHz?
Or uncalibrated vector output components below 250 MHz?
I need to be able to explain the issue to my AE colleagues so we can move on to another CTD solution, we have more of these requirements emerging.