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parado
Hello!!! I have a evalutation board of demodulator LT5575 at hand. I saw a strange problem with this board: when I use this, with the same frequency for LO and RF input (using a directional coupler like in figure) the amplitude of I and Q is incorrect, as if there were a same value add for each output I and Q indeed the phase is correct… (Show more)
in RF and Microwave
AVEdwards
Hello,   I am looking to use the Baseband IQ inputs to the ADRF6780 upconvertor. I have a signal generator producing a 200MHz continous signals, how is the best way to interface between my signal and the BBIQ inputs?   Can I simply split my continuous signal using a 90 splitter then two 180 splitters?   Do I need to insert a quadrature… (Show more)
in RF and Microwave
brightpeng
I am trying to use a SPDT RF switch ( HMC547ALP3). As shown below in the datasheet and truth table,  it seems that A and B can be used to control RF1 and RF2, respectively. I only need to use one channel to switch between signal and GND.  So can I just control A or B and tied the other to low? This will change this SPDT to a SPST. But I cannot… (Show more)
in RF and Microwave
Viktor_Vojta
Dear Sirs. I am using the PLL chip ADF4150HV in my design, I have problems with spurious in the output spectrum. The setting of PLL chip is briefly: RF output disabled (RF signal is derived directly from VCO), Loop BW ~1.2kHz, fractional mode = ON, Low spurious mode = ON. Input OCXO reference 10MHz (~2.5Vpp) is internally divided by 2 =>… (Show more)
in RF and Microwave
sinan.onat
Hello; I question the Trise and Tfall of ADRF5130, HMC646LP2ETR, ADRF5132BCPZN, HMC545AETR and HMC595AETR switches. I need Trise and Tfall measurements separately because I have a spec. of 50 - 100ns for Trise, and 50 - 200ns for Tfall. Trise is defined as 10% to 90% of a 1 GHz signal, and Tfall is defined as 90% to 10% of a 1 GHz signal. Regards,… (Show more)
in RF and Microwave
sinan.onat
I question the Trise and Tfall of the HMC849ALP4CE and HMC8038 switches. I need Trise and Tfall measurements separately because I have a spec. of 50 - 100 ns for Trise and 50 - 200 ns for Tfall. Trise is defined as 10% to 90% of a 1 GHz signal, and Tfall is defined as 90% to 10% of a 1 GHz signal.
in RF and Microwave
Chenman
Is the two output:RFAout and RFBout the differencial signals?Is the two signals' phase difference 180 deg ? Or they are actually in-phase signals? I have tried it to find they are of same phase,so it confused me a lot ,because the ADF4630-1 is directly connected to the two differencial inputs of AD8349.
in RF and Microwave
mlamanna
Hi everyone,    A few days ago, I received an ADL5380-EVALZ board, which I would like to use as a homodyne (direct conversion) receiver for a simple project.   To test the board, I split the signal coming from the signal generator and inserted it to the RFP and LOP inputs. I wanted to see how the DC signal outputs change, as a function of input… (Show more)
in RF and Microwave
matterwave
I set up an evaluation board for the HMC346AMS8GE together with the Single-Line Control Driver option as recommended in the datasheet.   Unfortunately the waveform is distorted during minimum attenuation and the attenuation for different control voltages is not uniform.   I have a picture attached which illustrates the problem. Is this an… (Show more)
in RF and Microwave
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