Agilent Technologies E8257D, User Manual

Page: 46 / 318

32 Chapter 1
Signal Generator Overview
Rear Panel
MOD SENSE Source module sense. A 1 mA current is injected on this line by the mm source
module to indicate its presence. This signal always equals 0V.
L MOD RF OFF Low = RF off. Source module RF is turned off.
EXT LVL RET Source module external leveling return.
EXT LVL Source module external leveling input, from the mm source module.
0.5V/GHz Internal 0.5 V/GHz to the mm source module.
–15V Power Supply. Range is –14.25 to –15.90V.
+
15V Power Supply. Range is
+
14.25 to
+
16.40V.
+
8V Power Supply. Range is
+
7.75 to
+
8.25V.
+
5V Power Supply. Range is
+
4.75 to
+
5.45V.
DIG GND Digital ground.
MOD ANLG GND Source module analog ground.
ANLG GND RET Analog ground return.
31. RF OUT
This connector outputs RF and microwave signals. The nominal output impedance is 50 ohms. The
reverse power damage levels are 0 Vdc, 0.5 watts nominal. On signal generators without Option 1EM,
this connector is located on the front panel. The connector type varies according to frequency option.
32. EXT 1
This female BNC input connector (functional only with Options UNT, UNU, or UNW) 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 without Option
1EM, this connector is located on the front panel.
33. EXT 2
This female BNC input connector (functional only with Options UNT, UNU, or UNW) 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
without Option 1EM, this connector is located on the front panel.