Dual Reference Output Filters Menu 2 - Ametek 7270 Instruction Manual

Chapter 5, FRONT PANEL OPERATION

5.5.06 Dual Reference Output Filters Menu 2

5-68
NORMAL
In this setting, the 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 5 ms and 100 ks in a 1-2-5 sequence, and all four output filter slope
settings are available.
FAST
In this setting, the analog outputs are derived directly from the core FPGA
running the demodulator algorithms. The update rate is increased to 1.0 MHz
when the time constant is set to any value from 10 µs to 500 ms but reverts to
1 kHz for longer time constants. The output filter slope is restricted to either 6 or
12 dB/octave.
Pressing the Output Filter Menu 2 key selects the Output Filter 2 Menu, while
pressing the Previous Menu key returns control to Main Menu 1.
In dual reference mode, pressing the Output Filters Menu 2 key on Output Filters
Menu 1 accesses the Dual Reference Output Filters Menu 2, shown in figure 5-51.
Figure 5-51, Dual Reference Output Filters Menu 2
The Dual Reference Output Filters Menu 2 has two controls affecting the
instrument's output low-pass filters, and a key to access the Output Filters Menu 1.
Changes to the setting of these controls can be made by using the adjacent
keys.
The controls operate as follows:-
TIME CONSTANT 2
This control, which duplicates the Main Display control of the same name, is used to
set the time constant of each of the output filters.
SLOPE 2
The roll-off of the outputs filters can be set, using this control, to either 6 dB or
12 dB per octave (Fast time constant mode) or 6 dB, 12 dB, 18 dB or 24 dB per
octave (Normal time constant mode).
Pressing the Output Filter Menu 1 key selects the Output Filter 1 Menu, while