digiBASE
®
PMT Base with Integrated Bias Supply, Preamplifier and Digital Multichannel Analyzer 931003E / 0620
Example Responses:
$F0OFF<CR> Gate disabled.
$F1COIN<CR> Gate set to coincidence mode. Low during peak detect
rejects conversions.
$F2ENABLE<CR> Gate functions as ENABLE. Stops clocks and conversions
when low.
$F3EVENT<CR> Gate functions as event counter.
SHOW_HV
Reports the current high voltage and the status of the high voltage power supply in the form
$Dvvvvvsssssccc.
Where vvvvv represents the current output voltage if the high voltage is enabled, or the rear-
panel high voltage setting if the high voltage is disabled. sssss represents the status of the
high voltage bias supply as a 16-bit decimal number with the following bit definitions:
Bit 0 (LSB): Bias supply polarity (0=positive, 1=negative).
Bit 1: Bias supply overload (0=overload, 1=normal).
Bit 2: High voltage enabled (0=disabled, 1=enabled).
Example Responses:
$D0100000003077<CR> 1000 V, negative, not overloaded, disabled.
$D0100000002076<CR> 1000 V, positive, not overloaded, disabled.
$D0100000007082<CR> 1000 V, negative, not overloaded, enabled.
SHOW_HV_ACTUAL
Returns the value of HV actually on the detector.
SHOW_HV_POLARITY
This returns the HV polarity setting as a $F record (always positive for the digiBASE).
Response:
$IPOS<CR> The HV is positive.
SHOW_HV_TARGET
Under normal operation, the HV will go to this value when the HV is enabled. Reports the
current HV setting (see SET_HV) and the status of the HV power supply in the form:
$Dvvvvvsssssccc<CR>
where vvvvv represents the HV setting, and sssss represents the status of the HV bias supply
as a 16-bit decimal number with the following bit definitions:
Bit 0 (LSB): Bias supply polarity (0=positive, 1=negative).
Bit 1: Bias supply overload (0=overload, 1=normal).
Bit 2: HV enabled (0=disabled, 1=enabled).
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