Aeroflex 3500A - Page 51

Subject to Export Control, see Cover Page for details. 2-11
A. Duplex Test Screen (cont)
SCREEN FEATURE FUNCTION
Modulator Used to change functionality of the modulation source fields.
Press F1 “ENTER” Key to toggle between Analog (CTCSS), DCS and
DTMF modulation source fields.
NOTE: The total combined modulation from all sources in each
Modulatorframe cannot exceed 100% for AM or 100 kHz for
FM.
If the modulation level of a selection source is set to a value
that would cause the total modulation to exceed the
modulation limit, the value of the unselected sources are
lowered automatically.
Analog (CTCSS) Modulation Source Fields
Gen 1 Used to select internal modulation.
Select: On or Off
AM:
Freq 0 to 20000 Hz in 1 Hz increments
%Mod 0% to 100% in 0.1% increments
FM:
Freq 0 to 20000 Hz in 1 Hz increments
Dev kHz 0 to 100 kHz in 0.01 kHz increments
Gen 2 Used to select internal modulation.
This setting can be toggled between Gen 2, DCS (Digitally Coded
Squelch) and DCS INV (Inverse DCS).
Select: On or Off
Select: AM:
Freq 0 to 20000 Hz in 1 Hz increments
%Mod 0% to 100% in 0.1% increments
FM:
Freq 0 to 20000 Hz in 1 Hz increments
Dev kHz 0 to 100 kHz in 0.01 kHz increments
MIC Used to select the external Microphone and the level of modulation for
the microphone input.
Select: On The external Microphone modulates the test set
signal generator.
Off Deactivates the external Microphone input.
AM 0% to 100% in 0.1% increments
FM 0 to 100 kHz in 0.01 kHz increments
Load
Used to select the Audio input signal load (Ω ).
Select: 150, 600, 1K (3500A), Div10 (3500A) or High Z