Ext 2 Input (Psg-A Only); Lf Output (Psg-A Only); Mod On/Off Key (Psg-A Only); Alc Input - Agilent Technologies E8241A User Manual

Signal Generator Overview
Front Panel

12. EXT 2 INPUT (PSG-A only)

This BNC input connector accepts a ±1 V signal for AM, FM, ΦM, and pulse modulation.
p
With AM, FM, or ΦM, ±1 V
produces the indicated deviation or depth. With pulse
p
modulation, +1 V is on and 0 V is off.
When ac-coupled inputs are selected for AM, FM, or ΦM and the peak input voltage differs
from 1 V by more than 3%, the HI/LO annunciators light on the display. The input
p
impedance is selectable as either 50Ω or 600Ω and damage levels are 5 V and 10 V .
rms p

13. LF OUTPUT (PSG-A only)

This BNC connector is the output for modulation signals generated by the low frequency (LF)
source function generator. This output is capable of driving 3 V (nominal) into a 50Ω load.
p

14. Mod On/Off Key (PSG-A only)

This hardkey toggles the operating state of all modulation signals. Although you can set up
and enable various modulation states, the RF carrier is not modulated until is set
Mod On/Off
to On. An annunciator is always present in the display to indicate whether modulation is
turned on or off.

15. ALC INPUT

This 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 kΩ and the damage level is ±15 V.

16. RF On/Off Key

This hardkey toggles the operating state of the RF signal present at the RF OUTPUT
connector. An annunciator is always visible in the display to indicate whether the RF is
turned on or off.

17. Numeric Keypad

The numeric keypad consists of the 0 through 9 hardkeys, a decimal point hardkey, and a
backspace hardkey ( ). The backspace hardkey enables you to backspace or specify a
negative value. When specifying a negative numeric value, the negative sign must be entered
prior to entering the numeric value.
8 Chapter 1