PVA-3000 Reference Manual
December 2, 2019 Sifos Technologies
4.18.3. Example 3: Calibrate Test Port for PSD, both 100BaseTX and 1000BaseT
This task is easily performed using the pva_cals command. Port 1,1 should be connected to Port 1,2 using the Sifos
furnished test cable.
Expected Result: STORED
4.18.4. Example 4 Measure 4-pair PSD and SNR of Cal Partner linked 1000Base-T
This task is performed using the mpair_snr and mpair-psd mulit-pair meter commands. Port 1,1 should be connected
to Port 1,2 using the Sifos furnished patch cable. PSD will be evaluated over 1 to 100MHz with 16 averages.
# Example 3 script
# Using PVA-3102 in slot,port 1,1
# Perform the calibration.
set rslt [pva_cals 1,1 psd 100 1000]
Figure 4.7 Exercise 3 Script Execution
# Example 4 script
# Using PVA-3102 in slot,port 1,1
set port 1,1
# Make sure that the cal partner is in a default state.
pva_reset [calport $port]
# Configure the Test Port for 1000Base-T, duplex, polarity
auto.
# NOTE the pva_reset call changed the port setting to 1,2!
set port 1,1
pva_speed $port 1000 duplex auto arm
pva_polarity $port auto arm
# Force a re-link, to establish the desired line conditions.
pva_relink $port
# Measure SNR.
set rslt [mpair_snr $port link 1000 avg 16]
# Measure PSD.
set rslt [mpair_psd $port start 1 stop 100 link 1000 avg 16]
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