PTE-300-V
Sheet 30
4.1.2.2. SLIP FREQUENCY MODE (
∆∆
F)
In this mode the I.F.G. acts as a differential frequency generator. The output frequency will be the
one that is applied to the external reference input plus/minus the difference selected in the
frequency display. The output frequency is “SLIP” against the reference frequency. This mode
cannot be used without an external reference. It allows selecting differences between ± 0.001 Hz
up to ± 10.00 Hz.
4.1.3. DYNAMIC TEST: SELECTING FREQUENCY RAMPS
Figure 12:
Frequency Ramp Selection
IMPORTANT:
When the unit is generating a frequency and the operator wishes to select a ramp,
this frequency WILL NOT CHANGE during the selection process, although it is
not indicated in the display.
The process to select a frequency ramp is as follows:
1. Select
Normal Frequency
mode (F), if it is not in this mode before. Press the key
Set
, the LED
indicator 1 (initial value of 1
st
ramp) will light up. Select in the display the frequency value
desired as the ramp initial value. This selection can be made between 40 and 300 Hz.
2. Press the key
Set
, the LED indicator 2, (slope 1), will light up and the display will change to the
units Hz/s. Selection is made by the rotating knob and the slope of the 1
st
ramp can be set in
Hz per second. This selection is from 0.01 Hz up to 10 Hz/s. If 0 is selected the slope will be
infinite, which means there is no ramp and the change is instantaneous to the second value,
when ordered.
3. Press the key
Set
, the LED indicator 3, (time duration of the final value of the 1
st
ramp), will
light up and the display change its units seconds (s). The rotating knob makes selection and it
is the time, in seconds, in which remains the final value of the 1
st
ramp and it is the time before
the second ramp begins. This selection is from 0.001 s up to 10 s. If 0 is selected, the final
value remains until a manual order is given.
4. Press the key
Set
, the LED indicator 4, (final value of the first ramp), will light up and the
display will change to the units Hz. Selection is made by the rotating knob and is in Hz, and the
value selected is the final value of the 1
st
ramp. This selection is from 40 Hz up to 300 Hz.
