HV MainFrame 1458
HV Main frame
Both of the crates (1454 and 1458) provide an RS-232 interface, allowing the use of a standard terminal for control and display. This interface provides the same capabilities as the front panel display in a text command format or full screen format (VT100 compatible). The front panel and RS-232 interfaces are always available for reviewing information in the crate, but changes can be locked out remotely or via a front panel key switch.
Finally, VISyN crates can be controlled (optional) over local area networks (LAN) via ARCNET or Ethernet (TCPIP). Ethernet is the most widely used LAN, available for all types of host systems. It allows for control over laboratory intranets as well as common internets. ARCNET is a proven industrial standard. It is a high speed (2.5 Mbaud) token-passing network protocol. The standard implementation of ARCNET is readily available and inexpensive for many types of host systems, including VME. Long distances (4 miles) can be covered; the token-passing system is deterministic; in heavy traffic; throughput does not decrease.
The Model 1458 Crate addresses high channel count applications. This crate supplies sixteen (16) slots for HV cards, but no keypad or LCD display. All control is via RS-232 or a local area network. The 1458 supports 192 channels of the 1461 HV card in 14 inches of vertical rack space.
Model 1461 3 kV Independent HV Supply
The Model 1461 HV card supplies 12 independent channels, in a single slot, suitable for photomultiplier tubes. The high voltage output is programmable from 0 to 3 kV. The output current supports a 1.2 Mohm load to 3 kV. Other features include voltage measurement, current measurement, programmable current trip, hardware voltage limit (once per card), and separate programmable ramp up and ramp down rates.