Main Menu 1; Signal Channel Menu - Ametek 7270 Instruction Manual

Dsp lock-in amplifier
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display. It is equivalent to accessing the function via the Auto Functions Menu - see
section 5.3.14
AUX DAC 1, AUX DAC 2, AUX DAC 3, and AUX DAC 4
These two controls set the voltage appearing at the DAC1, DAC2, DAC3, and
DAC4 output connectors on the rear panel to any value between +10 V and -10 V
with a resolution of 1 mV, assuming that the corresponding output is set to the
USER DAC mode on the DAC menu - see section. Adjustment is faster using the
Keypad or Active Cursor controls - see section 4.1.04.
OSC FREQUENCY
The frequency of the instrument's internal oscillator may be set, using this control, to
any value between 0.001 Hz and 250.000 kHz with a 1 mHz resolution. Adjustment
is faster using the Keypad or Active Cursor controls - see section 4.1.04.
OSC AMPLITUDE
This control sets the amplitude of the signal at the 7270's OSC OUT connector to
any value between 1 mV and 5 V rms. Adjustment is faster using the Keypad or
Active Cursor controls - see section 4.1.04.
Once the required controls have been selected, press the Selection Complete key on
the front panel to return to the Main Display.

5.3.03 Main Menu 1

When in the Main Display, press the Menu key once to access Main Menu 1, which
is shown in figure 5-4.
Main Menu 1 is used to access all of the remaining instrument controls via a series of
sub-menus, which are selected simply by pressing the key adjacent to the required
menu. These sub-menus are described in the following sections.

5.3.04 Signal Channel Menu 1

When Main Menu 1 is displayed, pressing a key adjacent to the Signal Channel item
accesses the Signal Channel Menu 1, which is shown in figures 5-5 and 5-6.
Chapter 5, FRONT PANEL OPERATION
Figure 5-4, Main Menu
5-7

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