STB8827
Series Operation Manual Chapter 3 Introduction to [MEAS]
this key, the frequency will change as the following sequence: 20Hz,
100Hz, 1kHz, 10kHz, 100kHz, 200kHz, 300kHz.
↑
(+)
This is a fine adjustment soft key used to increase the frequency. Press
this key, the frequency will switch between the following ones (The
highest frequency of
STB8827
C is 1MHz, The highest frequency
of
STB8827
B is 500kHz, the highest frequency of
STB8827
A is 300kHz):
20 Hz 100 Hz 1 kHz 10 kHz 100 kHz 1MHz
25 Hz 120 Hz 1.2 kHz 12 kHz 120 kHz
30 Hz 150 Hz 1.5 kHz 15 kHz 150 kHz
40 Hz 200 Hz 2 kHz 20 kHz 200 kHz
50 Hz 250 Hz 2.5 kHz 25 kHz 250 kHz
60 Hz 300 Hz 3 kHz 30 kHz 300 kHz
80 Hz 400 Hz 4 kHz 40 kHz 400 kHz
16
500 Hz 5 kHz 50 kHz 500 kHz
600 Hz 6 kHz 60 kHz 600 kHz
800 Hz 8 kHz 80 kHz 800 kHz
↓
(-)
This is a fine adjustment soft key used to decrease the frequency. The
selectable frequencies are the same as that of
↑
(+).
↓
(--)
This is a coarse adjustment soft key used to decrease the frequency. The
selectable frequencies are the same as that of
↑
(++).
2) Use soft keys or numeric keys to select or set frequency. When using numeric
keys to input the required frequency value, the soft key displays the available
frequency units (Hz, kHz and MHz). You can use unit soft key to input unit and
data. When using [ENTER] to input frequency, the default unit is Hz.
3.1.4 Test level
The measurement level of
STB8827
can be set according to the RMS value of
sine wave signal. The frequency of sine wave signal is the test frequency
which is generated by inner oscillator. You can set measurement voltage or
current. The level range is 50mV~2V. The corresponding current level mode
value has a linear relationship with the internal resistance (For example,
when the internal resistance is 30
Ω
, the corresponding current level is 166.7
μ
A ~ 66.7mA; when the internal resistance is 50
Ω
,
the corresponding current level is 100
μ
A ~ 40mA; when the internal resistance
is 100
Ω
, the corresponding current level is 50
μ
A ~ 20mA).
The output impedance of
STB8827
signal source can be 30
Ω
, 50
Ω
or 100
Ω
.
When the test function is DCR, the FREQ zone will display “---”.
Level voltage and resolution
