44
Subject to change without notice
Further options:
In case a TCXO is installed, option HO86, this will be dis-
played:
Frequency Reference
Internal with Option
Basic menu:
The basic menu containing the former settings will be displayed,
e.g.:
Fr: 1.0000000 kHz
Sin Tri
Sqr -->
After completion of the self test the instrument will
be ready to operate with the settings present at the
time of turn-off.
Check the parameters set and the output voltage
amplitude before connecting to your application
circuit. Not all circuits will tolerate 20 V
pp
at 1 MHz
HINT
square wave and may go up in smoke!
Prior to leaving the factory the following settings will be
stored:
– Frequency 1 kHz
– Amplitude 10 V
pp
– Offset 0
– Sine
– Free running
– Phase 0
– No modulation
– Rotational control activated
– Pos. trigger
– Internal reference frequency
– Medium background lighting, contrast maximum
– Acoustical signal: maximum
– Maximum resolution of frequency display
– Output
disabled
How to return to the factory settings:
At turn-on keep the ESC button depressed for several seconds,
this will erase all stored functions and restore the factory
settings.
Reset to the factory settings will also erase any
stored arbitrary functions and all stored keyboard
settings!
There is no signal at the output?
The signal output
is a 50 ohm output and can
be turned on/off by the button
. As the factory
setting includes the output being off just push the
HINT
button , and there you are!
Structure and using of the menus
Structure and using of the menus
3
4
5
6 7
21
8
9
10
11
Operation of the HM 8131-2 will be predominantly via the menus.
The parameters are either set using the keyboard or the incre-
mental control knob. Most menus are self-explanatory.
Basic menu
FR: 1.0000000 kHz
Sin Tri Sqr -->
3
4
5
6
The characters shown indicate:
Fr free-running with the frequency selected
Tr trigger mode selected with frequency selected
Gt gate mode selected with frequency selected
Sin sine
Tri triangle
Sqr square wave
+Rmp positive ramp
–Rmp negative ramp
Spc Special: arbitrary signal or noise selected
In the basic menu the selected frequency will be displayed. Also,
in this menu, the basic functions Sin, Tri, Sqr are selected. An
arrow selects the functions pos. sawtooth, neg. sawtooth,
spectrum. If any of the menus +rmp, –rmp, Spc was already
selected return to the basic menu is possible by using the
backwards arrow in order to select Sin, Tri, Sqr. The desired
functions are available via the menu pushbuttons
.
The function selected (Sin, Tri, Sqr, +rmp, –rmp) will be mar-
ked with a triangle. Upon selection of the function Spc another
menu will be entered in which arbitrary functions and noise
can be chosen.
How to control the menus
Addressing menus
Not all menus allow to reach any other menu as there are only
4 pushbuttons. In order to reach more menus in such case use
the symbol :
FR: 1.0000000 kHz
Sin Tri Sqr -->
a
b
d
c
Pushing button
d
below the arrow will access the second
portion of the basic menu.
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