2
Contents
1Introduction.......................................................................................... 3
1.1 Hera............................................................................................. 3
1.2 Hera highlights ............................................................................ 3
1.3 Standards.................................................................................... 3
2Interfaces............................................................................................. 4
2.1 USB interface.............................................................................. 4
2.2 Ethernet interface........................................................................ 4
2.3 RS232 interface .......................................................................... 4
2.4 Trigger in/out............................................................................... 5
2.5 Power connections...................................................................... 5
3Communications protocol.................................................................... 6
3.1 USB............................................................................................. 6
3.2 RS232 ......................................................................................... 6
3.3 Ethernet....................................................................................... 6
4Device drivers...................................................................................... 7
4.1 USB............................................................................................. 7
4.2 RS232 ......................................................................................... 7
4.3 Ethernet....................................................................................... 7
5Command set description ................................................................... 8
5.1 Commands.................................................................................. 8
5.2 Command structure..................................................................... 8
5.3 System commands...................................................................... 9
5.4 Configuration commands............................................................ 9
5.5 Measurement commands.......................................................... 11
5.6 User EEPROM commands .......................................................12
5.7 Returned results........................................................................ 15
6Measurement example...................................................................... 16
7Autoranging....................................................................................... 17
7.1 Introduction................................................................................17
7.2 How autoranging works............................................................. 17
7.3 Auto-range parameters ............................................................. 18
7.4 Auto-range in practice...............................................................18
7.5 Programming Hera for auto-ranging ......................................... 19
7.6 Auto-ranging recommendations................................................ 19
8Hera measurement results................................................................20
9Operating modes & triggering ...........................................................20
