
SWEEP Function
Function Generators
VII - 39
SWEEP frequency scan function
SWEEP is a frequency scan from Freq
START
to Freq
END
piloted:
•
either INTernally by the generator following a linear or logarithmic formula
and a saw tooth
or triangle
variation.
The user can choose a scan time from 10 ms to 100 s.
•
either EXTernally using a voltage of ± 10 V applied to VCF IN (GX 305/310)
or VCG IN (GX 320) with a frequency < 15 kHz.
•
Depending on the values of Freq
START
and Freq
END
the frequency scan will
be in ascending or descending order.
Remarks
When using EXTernal SWEEP the signal level is read at a frequency of 60 kHz.
This amplitude (coded on 256 values) is then converted into frequency.
When using INTernal SWEEP, the scan is made using a maximum of 256
values.
Connections
Selection of scan
mode
Pressed successively this key selects one of the following scan modes:
Assignment
sequence using
INTernal source
Display
Description
Channel1: MAIN OUT,
Channel2: SWEEP OUT
Linear rule,
triangular variation
Linear rule,
saw tooth variation
Logarithmic rule,
triangular variation
Logarithmic rule,
Saw tooth variation
TTL OUT
Input:
- in EXT: Pilot signal ± 10 V
- in INT: SWEEP OUT
Main
modulated
output signal