Sifos Technologies PhyView PVA-3000, Reference Manual

Page: 79 / 134

PVA-3000 Reference Manual
December 2, 2019 Sifos Technologies Page
79
4.7. Test PHY Front-End (PMA) Configuration
Test PHY PMA commands allow non-default overrides of Test PHY signal processing features. These features were
discussed earlier in Sections 2.2.11 and 2.2.12. These commands accept the broadcast configuration where
port = 99,99.
Command Port Command Parameters Query Returned
Parameters
pva_rx_gain < port > auto | low | med | high | rxgain ? AUTO | FIXED
+
Rx_Gain |
10BaseT
( Rx_Gain = -1 for
AUTO mode)
Configures Test PHY Receiver Gain and resets the Test
PHY to implement the specified gain level. The gain
setting will only affect 100BaseT and 1000BaseT links
since 10BaseT utilizes a fixed, preset gain setting.
auto Configures the Test PHY to automatically set
receive level gain on each link-up ( wake-up default ).
This control will also restore Tx Gain and Tx Slew to
their respective AUTO modes as well.
low Configures Test PHY for a low receive gain (2 out
of 10)
med Configures Test PHY for a medium receive gain (4
out of 10)
high Configures Test PHY for a high receive gain (8
out of 10)
rxgain Configures Test PHY for receive gain from 1
(lowest gain) to 10 (highest gain)
pva_tx_gain < port > auto | low | med | high | txgain ? AUTO | FIXED
+
Tx_Gain
Configures Test PHY Transmit Gain to a specified level
between 88% nominal levels and 112% nominal levels.
Nominal is ~‘6’ for 10 & 1000BaseT, ~‘7’ for 100BaseT.
auto Configures the Test PHY to automatically set
transmit level gain on each link-up ( wake-up default ).
This control will also restore Rx Gain and Tx Slew to
their respective AUTO modes as well.
low Configures Test PHY for a low transmit level (3 out
of 10)
med Configures Test PHY for a medium transmit level
(7 out of 10)
high Configures Test PHY for a high transmit level (10
out of 10)
txgain Configures Test PHY for transmit level from 1
(lowest gain) to 10 (highest gain)
pva_tx_slew < port > auto | min | slow | nom | fast | max | txslew ? AUTO | FIXED
+
Tx_Slew
Configures Test PHY transmitter output slew rate over
eight possible values with +35%, -54% range from
nominal slew rate. “Nominal” value is ‘3’ to get ~4nsec
for 100BaseT and ~3.7nsec for 1000BaseT.
auto Configures the Test PHY to automatically set
transmit slew rate on each link-up ( wake-up default ).
This control will also restore Rx Gain and Tx Gain to
their respective AUTO modes as well.
min Configures Test PHY for a minimum transmit slew
rate (1 out of 8)
slow Configures Test PHY for a slow transmit slew rate
(2 out of 8)
nom Configures Test PHY for a nominal transmit slew
rate (3 out of 8)
fast Configures Test PHY for a high transmit slew rate
(6 out of 8)
max Configures Test PHY for a maximum transmit slew
rate (8 out of 8)
txslew Configures Test PHY for transmit slew rate from
1 (slowest slew) to 8 (fastest slew)