User manual

"RANGE” you can switch between the inputs and in the case of
channel C you can switch to period measurement. According to the
following formula:
T = 1/f (f = frequency, T = period)
Attention!
Never exceed the maximum input rating(s). Only measure signal
voltages that are separated galvanically from the mains. The vol-
tage value must not exceed 5 Vpp max. at the channels A and B
and 88 Vrms at channel C.
B1 Adjusting the input channel
Depending on the frequency range you intend to measure, select
either channel A, channel B or channel C by setting the switch
"RANGE” correspondingly. In the position CH A frequencies bet-
ween 50 Mhz and max. 2500 MHz are measured. In the position CH
B measurements between 10 MHz and 500 MHz (= 0.5 GHz) can be
performed. The position CH C enables the frequency or period of a
measurement signal to be detected in the range of 10 Hz and 10
MHz and 0.1 s to 0.1 µs (microsecond), respectively.
B2 Adjusting the "GATE TIME”
The setting of the gate time depends on the measurement signal. If
you are measuring a relatively constant frequency and if you desire
a high accuracy, set the switch "GATE TIME” to the position
"SLOW”. If the measurement signal changes constantly, set the
switch "GATE TIME” to "FAST”. The current sampling time is indica-
ted by a flashing decimal point on the lower right corner of the dis-
play. The resolution and the display accuracy indirectly connected
to it can be adjusted via the push-button "RESO” (see also B4).
B3 Adjusting the input sensitivity "SENSITIVITY” (channel C)
For detecting weaker signals in the range up to 10 MHz the input
sensitivity can be increased via the switch "SENSITIVITY” for chan-
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