Aeroflex 3500A - Page 53

Subject to Export Control, see Cover Page for details. 2-13
A. Duplex Test Screen (cont)
SCREEN FEATURE FUNCTION
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
Ext Aud Used to select external modulation.
Select: On Permits an external tone generator to modulate
the test set signal generator.
Off Deactivates the external Audio input.
Load
Used to select the Audio input signal load (Ω ).
Select: 150, 600, 1K (3500A), Div10 (3500A) or High Z
DTMF 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
Dtmf Used to select the DTMF state.
Select: AM:
State Burst, Cont (Continuous) or Off
%Mod 0% to 100% in 0.1% increments (Lo)
0% to 100% in 0.1% increments (Hi)
Seq Up to 12 characters (0 to 9, A, B, C, D)
FM:
State Burst, Cont (Continuous) or Off
Freq 0 to 20000 Hz in 1 Hz increments
Dev kHz 0 to 100 kHz in 0.01 kHz increments
0 to 100 kHz in 0.01 kHz increments
Seq Up to 12 characters (0 to 9, A, B, C, D)
Mark Used to select the DTMF timing.
Select: 100 to 1000 ms in 1 ms increments
Space Used to select the DTMF timing.
Select: 100 to 1000 ms in 1 ms increments