TOELLNER TOE 7704 Bedienungsanleitung Seite 20

[9] key/LED
AC/AMPL
Results in output on the display of the AC value
set using the amplitude control and the attenuator
keys and
20 dB 40 dB
"V ". The key LED lights up when the AC value
PP
is output on the display. In the case of the function
DC/AMPL, the value of the gain for an external
signal applied to the BNC socket EXT IN is dis-
played in "dB".
[10] key/LED
DC
Results in output on the display of the DC offset
value set using the DC OFFSET control and the
attenuator keys
20 dB
output in "V". The key LED lights up when the
DC offset value is output on the display.
[11] key/LED
PHASE
Activates the setting of the start phase by the
START PHASE control. The key LED lights up in
the activated state. Only effective in the operating
modes TRIGGER and GATE.
[12] START PHASE / AM CARRIER LEVEL control
The START PHASE control is used in operating
modes TRIGGER and GATE to vary the start
phase from −90° to +90°. The phase control is
activated using the
AM, the AM CARRIER LEVEL control enables
variation of the carrier level from 0 % to 100 %.
The external AM is activated by the
by the key in the position "External".
INT/EXT
[13] key/LED
SYM
Activates the setting of the variable symmetry by
the SYMMETRY control. The key LED lights up in
the activated state. Variation of symmetry is possi-
ble up to a maximum frequency of 1.2 MHz with
12 MHz devices and 2.2 MHz with 22/44 MHz
devices.
[14] SYMMETRY control
Used to modify the variable symmetry from 10 %
to 90 % up to a maximum frequency of 1.2 MHz
with 12 MHz devices
22/44 MHz devices. The symmetry control is acti-
vated by the key.
SYM
[15] key/LED
AM
Activates the amplitude modulation. The key LED
lights up in the activated state. Sine-wave, trian-
gular-wave and square-wave functions are permis-
sible as the carrier signals for the AM. Modulation
is achieved with an internal AM (
position "Internal") using the added signal of an
internal 1 kHz sine-wave signal and an external
signal applied to the BNC socket EXT IN. The
modulation depth can be adjusted between 0 %
and 100 % using the MODULATION control.
In the case of exclusively external AM (
key in position "External"), modulation is only
achieved using an external signal applied to the
BNC socket EXT IN. The modulation depth can be
adjusted as with the internal AM between 0 % and
100 % using the MODULATION control. In addi-
20
for an open-circuit output in
and for an open-circuit
40 dB
key. With an external
PHASE
key and
AM
and 2.2 MHz
key in
INT/EXT
INT/EXT
tion, the level of the carrier can be varied between
0 % and 100 % using the AM CARRIER LEVEL
control which means that appropriate settings en-
able amplitude modulation with suppressed
carrier.
[16] MODULATION control
Used to adjust the modulation depth from 0 % to
100 % with internal and external amplitude
modulation. The MODULATION control is acti-
vated using the
[17]
DC OFFSET
Activates the setting of the DC offset using the
DC OFFSET control. The key LED lights up in
the activated state.
[18] DC OFFSET control
Used to set the DC offset at the BNC socket
OUTPUT from 0 V to ±10 V at the open-circuit
output or 0 V to ±5 V into 50
Z = 50 ). The DC OFFSET control is acti-
OUT
vated using the
can be output on the display using the
[19]
POWER ON/OFF
Power switch to turn the function generator on and
off. The green pilot LED lights up when the
device is switched on.
[20] MODIFY knob
Used to adjust the following operating parameters
output on the display: generator/PLL frequency,
sweep stop frequency, sweep start frequency,
sweep mode or sweep/trigger/gate period. Using
the CURSOR
[21] CURSOR
Used to shift the cursor to the left through the
significance digits of the following operating
parameters output on the display: generator/PLL
frequency, sweep stop frequency, sweep start
frequency or sweep/trigger/gate period. The selec-
ted digit flashes for approx. 5 s and can be varied
using the knob.
with
[22] RANGE
▲
Used for decadic upwards/downwards adjustment
of the following operating parameters output on
the display: generator/PLL frequency, sweep stop
frequency,
sweep/trigger/gate period.
[23]
MANUAL
Used in operating mode SWEEP with manual trig-
gering (
INT/EXT
and stop the sweep and with external triggering
(
INT/EXT
disable the external triggering of the sweep by a
signal connected to the BNC socket EXT IN. The
sweep can be interrupted and restarted at any po-
sition both with manual and external triggering.
The MANUAL LED lights up with an active
("Internal") or enabled ("External") sweep mode.
In the operating modes TRIGGER and GATE,
pressing the
key.
AM
key/LED
key. The set DC offset
DC OFFSET
switch/LED
key the significance is selected.
◄
◄ key
/ keys
▼
sweep start frequency
key/LED
key in position "Internal") to start
key in position "External") to enable or
key is evaluated as a trigger
MANUAL
TOELLNER Electronic Instrumente GmbH
(with
key.
DC
or