admv1014

Hi,

Bit 1 will turn on the detector. Depending on the RF input you will have to change the DET_PROG bits in reg 0x07 (bits 0:6) to notice a change based on the RF power input. Note the ranges presented in the SPI map are based of the power input to the detector and not the RF input into the part so you will have to refer to the OUTPUT DETECTOR PERFORMANCE section as well. 

Are you using a CW signal?

Thanks,

Hi

Is Voltage have presents on det out without rf power?

On pdf bit 0x3,6 shown as 0 (page 24)

"OUTPUT DETECTOR PERFORMANCE

Register 0x03, Bit 6 = 0, Register 0x03, Bits[13:12] set to 11, and TA = 25°C, unless otherwise noted"

 is it error in pdf?

Hi,

The detector will have an offset voltage with low rf power/no rf power of around 1V at room temperature.

Yes good catch. Register 0x03, Bit 6 should be 1.

Thanks,

Hi,

The detector will have an offset voltage with low rf power/no rf power of around 1V at room temperature.

Yes good catch. Register 0x03, Bit 6 should be 1.

Thanks,

Hallo, Please check picture SPI load. admv no switch to BB mode

Pictured first 0B register loading 

Hi,

Pls provide a picture with the SPI lines labelled. I think I was able to deduce that one line is SCLK and another line was SDI but I do not know which one was SEN. If any of the other 2 lines that go low are SEN then I do not see it coming back up after the end of the SPI transaction. The SEN needs to come back up at the end of the SPI transaction to shift the data in.

How do you verify that part switches to BB mode?

Thanks,

Hallo

SPI send

{ 0x0B, 0x727C }, //VVA TEMP COMP
{ 0x03, 0x3857}, // DET EN BB3857 IF3157
{ 0x04, 0x570A }, // 5.4 - 8 LO
{ 0x07, 0xD802 }, // Det out -14 +2 dBm
{ 0x0A, 0x2391 },

Pictured

after CS gous low 1,25 mS to clock

here pictured  { 0x03, 0x3857},   // DET EN BB3857   IF3157

Do spi format is correct ?

admv1014 after power up in IF mode, and not set BB mode, RF signal outs by IF pins.

BR

here is reading data

0x00

0x01

0x03

0x04

0x07

Hi,

Thank you for providing the labelled SPI waveforms. I think the SPI is working correctly.

In the write sequence could you add these 3 transactions?

1) Toggle the RST pin (high, low, high)

2) Write 0x4093 to reg 0x00 (soft reset)

3) Write 0x0093 to reg 0x00 (making sure soft reset bit is clear, if you're using parity bit then write 0x8093 but then this bit has to be cleared when writing to reg 0x0B).

Then complete the write sequence as you have shown above.

What are the power levels from the IF ports and BB ports when the part is in IF mode and BB mode?

When making these measurements please ensure that the VVA voltage is the same.

Also pls 50 ohm terminate the unused ports when making these measurements.

And let me know the RF and LO frequency that you are using so I can replicate it.

Thanks