
Contents iii
4.4 Ethernet .......................... 4–10
4.4.1 Connection example ............... 4–11
4.5 Commands ......................... 4–16
4.5.1 Command syntax ................. 4–16
4.5.2 Notation ...................... 4–17
4.5.3 Examples ..................... 4–17
4.5.4 Laser limit commands .............. 4–18
4.5.5 Laser setting commands ............. 4–20
4.5.6 Laser monitor commands ............ 4–22
4.5.7 Laser configuration commands ......... 4–24
4.5.8 Laser trip-offcommands ............. 4–29
4.5.9 TEC limit commands ............... 4–31
4.5.10 TEC setting commands ............. 4–33
4.5.11 TEC monitor commands ............. 4–35
4.5.12 TEC configuration commands ......... 4–36
4.5.13 TEC sensor commands .............. 4–40
4.5.14 TEC trip-offcommands ............. 4–45
4.5.15 Interface commands ............... 4–46
4.5.16 Status commands ................. 4–52
4.6 Status Model ........................ 4–57
4.6.1 Status byte (SB) .................. 4–58
4.6.2 Service request enable (SRE) .......... 4–59
4.6.3 Standard event status (ESR) ........... 4–59
4.6.4 Laser diode condition (LDCR) ......... 4–60
4.6.5 TEC controller condition (TECR) ........ 4–61
5 Error Messages 5 – 1
5.1 Laser Diode Driver Messages .............. 5–2
5.1.1 Interlock ...................... 5–2
5.1.2 Transitions with high photodiode current . . . 5 – 2
5.1.3 Transitions with limited laser current ..... 5–2
5.1.4 Transitions locked out .............. 5–2
5.1.5 Responsivity ................... 5–3
5.1.6 Photodiode current overflow .......... 5–3
5.1.7 Responsivity underflow ............. 5–3
5.1.8 Responsivity overflow .............. 5–4
5.1.9 Trip-offfromTEC................. 5–4
5.1.10 Trip-offfrom temperature ............ 5–4
5.2 TEC Messages ....................... 5–4
5.2.1 Autotune ...................... 5–4
5.2.2 No loop control .................. 5–5
5.2.3 Transitions locked out .............. 5–5
LDC500 Series Laser Diode Controllers