Ametek 7280 Instruction Manual page 80

Chapter 5, FRONT PANEL OPERATION
5-34
Figure 5-22, Analog Outputs Menu, Normal Operating Mode,
The Analog Outputs menu has three controls, changes to the setting of which can be
made by using the adjacent
OPERATING MODE
This control determines the position from which the analog outputs are derived in the
circuit (see figure 3-1), and hence the rate at which they are updated. It also affects
the available output filter slope, the permitted range of time constants, and the rate at
which oscillator frequency and amplitude sweeps can be carried out (see sections
5.3.10 and 5.3.11). It has two settings, as follows:
NORMAL
In this setting, the CH1 and CH2 analog outputs are derived from the output
processor. The update rate is always 1 kHz, the output filter time constant can be set
to values between 500 µs and 100 ks in a 1-2-5 sequence, and all four output filter
slope settings are available. The minimum step time per point for oscillator amplitude
and frequency sweeps is 1 ms.
In this mode, the CH1 ANALOG OUTPUT and CH2 ANALOG OUTPUT controls can each be
set to any of the following ten available settings.
X% (2.5V fs)
When set to X% the corresponding CH1/CH2 connector on the rear panel will
output a voltage related to the X%fs front panel display as follows:-
X%
+300
+100
0
-100
-300
Single/Virtual Reference Modes
keys.
CH1/2 Voltage
7.5 V
2.5 V
0.0 V
-2.5 V
-7.5 V