16 Keysight E8357D/67D & E8663D PSG User’s Guide
Signal Generator Overview
Front Panel
11. EXT 1 INPUT
This female BNC input connector (functional only with Options UNT, UNU, or
UNW or on the E8663D) accepts a
±
1 V
p
signal for AM, FM, and
Φ
M. For these
modulations,
±
1 V
p
produces the indicated deviation or depth. When
ac–coupled inputs are selected for AM, FM, or
Φ
M and the peak input voltage
differs from 1 V
p
by more than 3 percent, the HI/LO display annunciators light.
The input impedance is selectable as either 50 or 600 ohms; the damage levels
are 5 V
rms
and 10 V
p
. On signal generators with Option 1EM, this connector is
located on the rear panel.
12. EXT 2 INPUT
This female BNC input connector (functional only with Options UNT, UNU, or
UNW or on the E8663D) accepts a
±
1 V
p
signal for AM, FM, and
Φ
M. With AM,
FM, or
Φ
M,
±
1 V
p
produces the indicated deviation or depth. When
ac–coupled inputs are selected for AM, FM, or
Φ
M and the peak input voltage
differs from 1 V
p
by more than 3 percent, the HI/LO annunciators light on the
display. The input impedance is selectable as either 50 or 600 ohms and
damage levels are 5 V
rms
and 10 V
p
. On signal generators with Option 1EM,
this connector is located on the rear panel.
13. LF OUTPUT
This female BNC output connector (functional only with Option UNT or on the
E8663D) outputs modulation signals generated by the low frequency (LF)
source function generator. This output is capable of driving 3V
p
(nominal) into
a 50 ohm load. On signal generators with Option 1EM, this connector is
located on the rear panel.
14. Mod On/Off
This hardkey (E8267D and E8257D with Options UNT, UNU, or UNW) enables
or disables all active modulation formats (AM, FM,
Φ
M, Pulse, or I/Q) applied
to the output carrier signal available through the RF OUTPUT connector. This
hardkey does not set up or activate an AM, FM,
Φ
M, Pulse, or I/Q format; each
modulation format must still be set up and activated (for example,
AM > AM
On
) or nothing is applied to the output carrier signal when the
Mod On/Off
hardkey is enabled. The
MOD ON/OFF
annunciator indicates whether active
modulation formats have been enabled or disabled with the
Mod On/Off
hardkey.
15. ALC INPUT
This female BNC input connector is used for negative external detector
leveling. This connector accepts an input of
−
0.2 mV to
−
0.5 V. The nominal
input impedance is 120 kohms and the damage level is
±
15 V. On signal
generators with Option 1EM, this connector is located on the rear panel.
