(8.5x11) 6000 Manual Cover - Newport Corporation

2.4.5 Attenuator
The Attenuator selects the responsivity value, R λ
, to be the value for the
detector alone or the value for the detector-with-attenuator. When ATTN is
ON the ATTN annunciator is lit and the responsivity of the detector-withattenuator
is used. When ATTN is OFF, the annunciator is off and the detector-alone
responsivity is used. If the detector does not have an attentuator, or
if USR CAL is on (Section 2.4.6) the ATTN setting has no effect.
2.4.6 User Calibration
The Model 2832-C allows one to create a detector responsivity which overrides
the responsivities obtained from the detector’s calibration module.
This allows one to account for the effects of additional optics and filters in the
measurement path. When USR CAL is on, the USR CAL annunciator is lit and
the meter adopts the responsivity value displayed by the editable USR RESP
value. Use the PRESENT RESP function to display the current calibration
module responsivity.
The USR RESP units are the same as the PRESENT RESP units. Table 10 lists
the possible user calibration operations.
Table 10 – User Calibration Operations
Menu Operation Keypad Commands Associated Remote Commands
USR CALIB ON, OFF Edit USR CALIB USRCAL_n, USRCAL_n?
ON, OFF
USR RESP
Edit d.dddE±dd A/W* USRRESP_n, USERRESP_n?
PRESENT RESP ENTER to view RESP_n?
d.dddE±dd A/W*
*These units are not editable.
NOTE
n in a remote command stands for A (channel A) or B (channel B).
2.4.7 DC Sampling
The Model 2832-C incorporates two analog-to-digital, (A/D) converters, one
with 20,000 count resolution and a second with 4096 count resolution. The
user may select which A/D will be used for both channels during DC CONT
and DC SNGL acquisition modes. All other modes use the 4096 count A/D.
The 20,000 count A/D converter can operate at sample rates up to 25 Hz.
When two detector calibration modules are plugged into the meter, the 4,096
count A/D converter can operate at sample rates up to 500 Hz. When one
detector calibration module is plugged into the meter, the 4,096 count A/D
converter can operate at sample rates up to 1000 Hz.
The SAMPLE PREC menu command, Table 11, selects which analog-to-digital
converter is used for both channels. The sampling frequency for both
channels can be adjusted within the limits imposed by the SAMPLE PREC
state, see Table 12. When the SAMPLE PREC state changes, the sampling
frequency defaults to 25 Hz if the existing SAMPLE FREQ is incompatible with
the new SAMPLE PREC state. The SAMPLE FREQ and the SAMPLE PREC
settings affect both channels, not just the display channel.
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