As you can see from the output, the scpi driver gets confused between the
amp and and volt readout.
The PSU is set to 12V and is switched off.
reading directly from /dev/usbtmc0 works fine.
```
$ sigrok-cli -d scpi-pps --continuous
I1: 12.000 A DC
P1: 0 mW
V1: 0 mV DC
I1: 12.000 A DC
P1: 0 mW
V1: 0 mV DC
I1: 12.000 A DC
P1: 0 mW
V1: 0 mV DC
I1: 12.000 A DC
P1: 0 mW
V1: 12.000 V DC
I1: 0 mA DC
P1: 0 mW
V1: 0 mV DC
I1: 12.000 A DC
P1: 0 mW
V1: 0 mV DC
I1: 12.000 A DC
$ sigrok-cli -d scpi-pps --show
Driver functions:
Power supply
Scan options:
conn
serialcomm
scpi-pps - OWON P4305 FV:V1.5.0 [S/N: 2001593] with 3 channels: V1 I1 P1
Channel groups:
1: channels V1 I1 P1
Supported configuration options across all channel groups:
continuous: on, off
limit_samples: 0 (current)
limit_time: 0 (current)
```
--
Best Regards
Sahaj Sarup
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