Saker XFVP-L, Руководство пользователя

Страница: 12 / 13

2) Measure the voltage of the voltage source with the multimeter in the mV scale.
3) Connect the voltage source to the probe head with the BNC/SMB adapter.
4) Connect the output of the XFVP-L to the multimeter using the 50Ohm terminator and the
BNC to jack adapter.
5) Turn on the receiver and press the “Offset adjust” button in the XFVP-L receiver. Measure
the output of the receiver
Total offset error (output referred)= (V
XFVP
- V
source0V
/10)
DC GAIN Verification .
1) Measure the offset error following the previous instructions and save this data.
2) Set the voltage source to 2V, measure this voltage with the multimeter and adjust it as close
to 2V as possible (within 10mV max).
3) Connect the voltage source to the probe head with the BNC/SMB adapter.
4) Connect the output of the XFVP-L to the multimeter using the 50 Ohm terminator and the
BNC to jack adapter
5) Press the CAL button in the XFVP receiver.
6) After CAL is finished measure the output voltage of the probe.
To calculate the overall DC error, correct first for the error in the offset.
DC error (%) =
If the probe does not meet the DC accuracy, use the trimpot at the back of the unit to correct
it.
Bandwidth verification (optional)
Using a spectrum analyzer with tracking generator and at least 1GHz capability:
1. Set the output level of the tracking generator to -5dBm.
2. Set the horizontal sweep from 1MHz to 500MHz, log sweep.
3. Place a jump cable from output of tracking generator to input of spectrum analyzer.
4. Normalize the reading to obtain a flat 0dBm reading across the spectrum.
5. Connect the output of the XFVP-L probe to the input of the spectrum analyzer. Press
OFFSET.
200 − Vm ea sur ed ( mV ) + Vo f fset ( mV )
200
* 100
BR-XFVPL-Rev 2. 12/22
www.saker-mv.com