Bruker BLAH1000 E, Operating & Service Manual

Page: 29 / 54

Operating & Service Manual Version 002 BRUKER BIOSPIN 29 (53)
Theory of Operation
Table 5.1. Fault Detection Timings
Peak, pulse width, duty cycle, mismatch and also mean power values can
by read out at any time from the main DSP for monitoring purpose.
- Fault protection reset.
If one of these overstresses appears the board automatically resets the
fault flags after 2 seconds, the gating signal is disabled and the status led
board on the front panel displays the fault.
This means, for example, that when a pulse width fault occurs, the amplifier
channel is disabled after the detection delay. The side effect is that the fault
condition disappears since the channel's output power is null.
After 2 seconds, the channel is switched on and the cycle begins again
(unless the channel RF input signal is re-adjusted to meet the power
limitations).
BLA Extension Board 5.2.3
This board gives the information to the control board of RF detection.
Status Led Board 5.2.4
The status led board, on the front panel of the amplifier, displays overstress
functions, supplies status, and so on, as described in
"Indicators" on page 13
and "BLA Control Board" on page 27 .
BIS Board 5.2.5
The universal BIS board is located on the amplifier case and contains
identifications of the amplifier.
Fault Detection delay (max)
Peak power 500 ns
Duty cycle 100 µs
Pulse Width 100 µs
Mismatch 100 µs
Power Supply, Fan 200 ns
Heat sink temperature 500 ms