Rohde & Schwarz Hameg HM8150, User Manual

Page: 22 / 36

22
Controls and display
Fig. 2.1: Front panel of the HMF2550 / HMF2525
1 2 4 5 6 7 8
9
10
3
11 12 20 14 15 16 13 17 18 19
5
2 Controls and
display
Front panel
1
POWER (Pushbutton)
Power switch, mains connector on rear panel
2 REMOTE (Button)
The REMOTE button is lit, if the instrument is operated
via the interface. Return to manual mode by depressing
the REMOTE button is possible, provided that the inst-
rument is not in the local lockout state.
3
Display (LCD)
Display for signal parameters. The frequency resolution
is 5 digit. The output voltage is indicated as V
pp
(open
circuit) on a 3 digit display.
When SWEEP mode is active the display indicates
sweep time, start frequency or stop frequency.
If PULSE WIDTH
14
is selected, the frequency display is
replaced by the display for pulse width.
Similar applies to the voltage display. When OFFSET
11
is selected, the display indicates the DC offset value
(open circuit).
4 Rotary knob
Knob for setting the signal parameters
5
(Buttons)
Cursor keys for shifting the cursor to the position to be
change
6
x10 and
13
÷10 (Buttons)
Buttons for decadic parameter changing
7 OFFSET (Button)
Button for activating the offset function. The output
signal is superimposed with a DC voltage. The OFFSET
button is illuminated, if the offset is activated.
8
OUTPUT (Button)
Button for activation of the output. The output is on, if
this button is illuminated.
9
INVERT (Taste)
Button for inversion of ramps, pulses and arbitary sig-
nals. If the INVERT function is activated with the sine
wave, square wave or triangel function, the signal is
180 degrees phase shifted with respect to the trigger
signal (TRIG. OUTPUT). The button is illuminated, if the
function is active.
10
OUTPUT (BNC socket)
Signal output, impedance 50 Ω
11
OFFSET (Button)
Button for activation of the offset setting mode. The
OFFSET button is illuminated, if the offset can be chan-
ged using the rotary knob and the
5 buttons or
the ÷10
13
and x10
6
buttons.
12
AMPL (Button)
Button for activation of the amplitude setting mode.
The AMPL button is illuminated, if the signal amplitude
can be changed using the rotary knob and the
5
buttons or the ÷10 13 and x10 6 buttons.
14 PPULSE WIDTH (Button)
Button for activation of the pulse width setting mode.
The PULSE WIDTH button is illuminated, if the PULSE
WIDTH can be changed using the rotary knob and the
5
buttons or the ÷10
13
and x10
6
buttons.
15
FREQ (Button)
Button for activation of the frequency setting mode.
The FREQ button is illuminated, if the frequency can be
changed using the rotary knob and the
5 buttons
or the ÷10
13
and x10
6
buttons.
16
SWEEP (Buttons)
Selection of the parameters for sweep mode. Sweep
time (TIME), start frequency (START) and stop fre-
quency (STOP) can be set indepently from each other.
The settings can also be accomplished during sweep.
The modification is carried out immediately. The sweep
function is active, if the ON button is illuminated..
17
FUNCTION (Buttons)
Selection of the signal: sine wave , square wave ,
triangle , pulse , ramp , arbitrary
The button of the selected signal is illuminated