Skip to content

Latest commit

 

History

History
237 lines (178 loc) · 5.24 KB

Test description.md

File metadata and controls

237 lines (178 loc) · 5.24 KB
Raw

Measurements done on the PRP1 Power rail probe

This documents lists all the measurements that are done on the PRP1 for design characterisation.
The measurements were done on two separate units, results are published in folders

1) Bode plot 10MHz

Verifies the gain errors across the frequency span\

image\

Equipment used:

  • Siglent SDS804X HD Oscilloscope
  • Siglent SDG1032X HD Generator

Settings:

  • 10Hz to 10MHz
  • 10 point/decade
  • 100mV peak to peak
  • 0V offset
  • Frequency mode: Linear
  • DUT input CH1
  • DUT output CH3
  • Load 50 Ohm

Pass criteria: 1dB maximum deviation between minimum and maximum of the gain plot Note: Crossover frequency is ~ 100 KHz
Note: 1.3:1 is 0.77 or -2dB

2) AC gain @ 10 MHz

Verifies the 1.3:1 probe attenuation\

image

Equipment used:

  • Siglent SDS804X HD Oscilloscope
  • Siglent SDG1032X HD Generator

Settings on generator:

  • 10MHz sine wave
  • 100mV peak to peak
  • 0V offset
  • Load 50 Ohm
  • Using 1:1 setting on the PRP1

Pass criteria: 5% maximum deviation between RMS and Peak to peak value of CH1 and CH3\

3) Noise measurement 20MHz BW 12 bit Scope

Verifies the noise figure of the PRP1\

image

Settings:

  • PRP1 zeroed-out
  • PRP1 powered by lab linear power supply
  • PRP1 input shorted by SMA shoring plug or 50Ohm load
  • 2 mV/div on CH1
  • 1:1 probe on CH1
  • CH1 terminated with a 50 Ohm terminator
  • 2.6 mV/div on CH3
  • 1.3:1 probe on CH3
  • 1 ms/div time scale
  • 20MHz bandwidth limit

Pass criteria: $\Noise = sqrt{CH3^2 - CH1^2} < 50uV$

4) DC gain

Verifies the 1.3:1 probe attenuation on DC\

image

Equipment used:

  • Siglent SDS804X HD Oscilloscope
  • Siglent SDG1032X HD Generator

Settings:

  • PRP1 zeroed out on Oscilloscope with 0V input
  • 10 Hz square wave
  • 100mV peak to peak
  • 0V offset

Pass criteria: Measured 100mV peak to peak on the oscilloscope on CH1 and CH3
Two measurements are 5% within each other

5) Cancellation range +24V and -24V

Verifies the +/-24V Cancellation range of the PRP1\

image

Equipment used:

  • Siglent SDS804X HD Oscilloscope
  • Rigol DP832 Power supply

Settings:

  • PRP1 zeroed-out after each change of the voltage on power supply
  • Set up 5V, 12V, 24V with 0.1A current limit on power supply
  • Flip BNC to banana adapter and repeat measurement

Pass criteria: PRP1 can be adjusted to less than 100mV measured on the oscilloscope Output current of the power supply is less than 1mA

6) 500mV dynamic range

Verifies the active signal range of the PRP1\

image

Equipment used:

  • Siglent SDS804X HD Oscilloscope
  • Siglent SDG1032X HD Generator

Settings:

  • PRP1 zeroed out on Oscilloscope with 0V input
  • 10 KHz square wave
  • 500mV peak to peak
  • 0V offset

Pass criteria: Measured 500mV peak to peak on the oscilloscope

7) DC input 50KOhm

Verifies the 50KOhm input impedance in DC conditions of the PRP1\

image

Equipment used:

  • Siglent SDS804X HD Oscilloscope
  • HP 34401A multimeter

Settings:

  • PRP1 zeroed out on Oscilloscope with 0V input
  • resistance measurement auto range

Pass criteria: 50Kohm +/- 2% measured on DMM

8)a VNA bandwidth 10MHz-3 GHz

Verifies the minimum 2 GHz bandwidth of the PRP1\

image

Equipment used:

  • LiteVNA
  • Rigol DP832 Power supply
  • MegiQ VNA calibration kit
  • LiteVNA SS405 Coax cables

Settings:

  • 10 MHz to 3 GHz sweep

Pass criteria: 1dB maximum deviation between minimum and maximum of S12 up to 2 GHz
Nominal gain is -2dB +/- 1dB
Note: 1.3:1 is 0.77 or -2dB

8)b VNA bandwidth 400MHz-3 GHz 2nd setup

Verifies the minimum 2 GHz bandwidth of the PRP1 with a more accurate VNA\

image

Note: Minimum frequency setting of the VNA is 400 MHz
Equipment used:

  • MegiQ VNA-0440e
  • Rigol DP832 Power supply
  • MegiQ VNA calibration kit
  • LiteVNA SS405 Coax cables

Settings:

  • 400 MHz to 3 GHz sweep
  • S11,S12 measured

Pass criteria: 1dB maximum deviation between minimum and maximum of S12 up to 2 GHz
Nominal gain is -2dB +/- 1dB

9) S parameters

image

Equipment used:

  • LiteVNA
  • Rigol DP832 Power supply
  • MegiQ VNA calibration kit
  • LiteVNA SS405 Coax cables Settings:
  • 10 MHz to 3 GHz sweep

Pass criteria: None S parameters provided for reference

10) 50 Ohm loading at high freqency, VSWR

image

Equipment used:

  • MegiQ VNA-0440e
  • Rigol DP832 Power supply
  • MegiQ VNA calibration kit
  • LiteVNA SS405 Coax cables

Pass criteria: VSWR < 1.5 up to 2 GHz
This is equivalent to Return loss < -13dB
Or capacitive loading of ~ 0.5pF

11) Noise measurement 1GHz BW 8 bit scope

Verifies the high freqency noise content of the PRP1\

image\

2 GHz scope should be used for ideal conditions, but I don't have access to one
Equipment used:

  • Keysight MSOX 3104T Oscilloscope
  • Keithley 2221A Power supply Settings:
  • PRP1 zeroed-out
  • PRP1 powered by lab linear power supply
  • PRP1 input shorted by SMA shoring plug or 50Ohm load
  • 2 mV/div on CH1
  • 1:1 probe on CH1
  • 2.6 mV/div on CH3
  • 1.3:1 probe on CH3
  • 20 us/div time scale to get the full samplerate and bandwidth
  • 50 Ohm input CH1 and CH3

Pass criteria: TBD

12) Power consumption

image Equipment used:

  • Siglent SDS804X HD Oscilloscope
  • Rigol DP832 Power supply

Settings:

  • 5V, 0.1A
  • PRP1 zeroed-out

Pass criteria: Power consumption less than 20mA