Table of Contents
Advertisement
Chapter 6, COMPUTER OPERATION
AS
ASM
ACGAIN [n]
AUTOMATIC [n] AC Gain automatic control
LF [n
6-12
n
full-scale sensitivity
IMODE=0
17
500 µV
18
1 mV
19
2 mV
20
5 mV
21
10 mV
22
20 mV
23
50 mV
24
100 mV
25
200 mV
26
500 mV
27
1 V
Floating point mode can only be used for reading the sensitivity, which is reported in
volts or amps. For example, if IMODE = 0 and the sensitivity is 1 mV the command
SEN would report 18 and the command SEN. would report +1.0E-03. If IMODE was
changed to 1, SEN would still report 18 but SEN. would report +1.0E-09
Perform an Auto-Sensitivity operation
The instrument adjusts its full-scale sensitivity so that the magnitude output lies
between 30% and 90% of full-scale.
Perform an Auto-Measure operation
The instrument adjusts its full-scale sensitivity so that the magnitude output lies
between 30% and 90% of full-scale, and then performs an auto-phase operation to
maximize the X channel output and minimize the Y channel output.
AC Gain control
Sets the gain of the signal channel amplifier according to the following table:-
n
AC Gain
0
0 dB
1
6 dB
2
12 dB
3
18 dB
4
24 dB
5
30 dB
6
36 dB
7
42 dB
n
Status
0
AC Gain is under manual control, either using the front panel or the ACGAIN
command
1
Automatic AC Gain control is activated, with the gain being adjusted according
to the full-scale sensitivity setting
n
]
Signal channel line frequency rejection filter control
1
2
The LF command sets the mode and frequency of the line frequency rejection
(notch) filter according to the following tables:
IMODE=1
IMODE=2
500 pA
5 pA
1 nA
10 pA
2 nA
20 pA
5 nA
50 pA
10 nA
100 pA
20 nA
200 pA
50 nA
500 pA
100 nA
1 nA
200 nA
2 nA
500 nA
5 nA
1 µA
10 nA
n
AC Gain
8
48 dB
9
54 dB
10
60 dB
11
66 dB
12
72 dB
13
78 dB
14
84 dB
15
90 dB
Advertisement
Table of Contents
