GW Instek GSP-830 User Manual - Manual (Page 57)

AMPLITUDE
57
Set Input Impedance
Select input impedance (50Ω/75Ω)
Background In most cases, the default 50Ω is appropriate. Use 75Ω
when specifically required, such as in cable TV signals.
1. Press the Amplitude key.
Amplitude
2. Press F6 (More).
More F 6
Panel operation
3. Press F1 (Input Z 50Ω/75Ω) to
select the impedance.
4. When 75Ω is selected, the
amplitude icon appears at the
bottom of the display.
Set impedance offset (75Ω only)
Background Impedance transformation to 75 Ω is also available
through external devices such as impedance converter
module (optional accessory ADP-101). In these cases an
external loss will be induced. Impedance offset can
compensate this effect.
1. Press the Amplitude key.
Amplitude
2. Press F6 (More).
More F 6
Panel operation
3. Make sure 75Ω is selected in F1
(Input Z).
4. Press F2 (Input Z Cal).
Input Z Cal
5.9dB
F 2
5. Enter the offset using the
Numerical keys and dB or Enter
key.
BK SP
dB
Enter
GHz / Sec
mSec MHz /
kHz / Sec μ
Range −10dB to +10dB, 0.1dB resolution