NF FRA51602, Instruction Manual

Page: 249 / 286

9.1 Oscillator section
9
-
3
FRA 51602

DC bias
The DC bias output is superimposed on the AC signal only when the DC bias output is set to the OSC
connector on the front panel of the instrument.
Setting range -10 V to 10 V
Setting resolution 10 mV
Accuracy ±(|1% of DC bias setting | + 2% of AC amplitude se 30 mV)
Conditions: sinusoidal waveform, no load

Output impedance 50 Ω ±2% Conditions: 1 kHz

Maximum output (AC + DC)
Voltage ±10 V Conditions: no load
Current ±100 mA

Output control
QUICK (immediately changes to the set voltage or to 0 V)
SLOW (changes to the set voltage or to 0 V gradually over a period of about 10 seconds)
Function for turning off at 0° phase
Function for changing the frequency at 0° phase
It is possible to turn the AC and DC on / off at the same time or to turn off the AC independently.
It is possible to turn on automatically at the start of measurement and to turn off automatically at the
end of measurement.

Sweep
Sweep density 3 to 20,000 steps/sweep
Sweep type Linear or log, selectable
Sweep direction Up or down, selectable
Pressing the front panel
START UP
key or
DOWN
key starts the sweep.
Sweep time Conditions: Integration cycle 1, delay 0 s, the sweep time per frequency point
for when a fixed range is set for both analysis input channels (supplementary
value)
For when the sweep density is 3 to 200 steps/sweep
Frequency f Sweep time per frequency point
10 µHz
≦
f
＜
1.36 kHz
(1/f) s
1.36 kHz
≦
f
＜
50 kHz
1 ms to 1.5 ms
50 kHz
≦
f
0.5 ms
When the sweep density is 201 to 20,000 steps/sweep, add 1 ms to the values in the above table.

Isolation 600 V CAT II or 300 V CAT III (BNC grounded to the enclosure)
Below 45 Hz: 600 Vpk (AC + DC)
45 Hz to 100 kHz: 600 Vrms (AC)
100 kHz to 2 MHz: 600 Vrms (AC) × 100 ÷ F
where F is frequency in units of kHz.
At 45 Hz and above, the voltage including DC must be 600 Vrms or less and
849 Vpk or less.
Capacitance relative to the enclosure 150 pF or less