Radio Shack 22-812A, Руководство пользователя, Страница: 17 / 24

MASTER BKGRD 6-26-07
1
MASTER BKGRD 6-26-07
Taking Measurements
Notes :
• if the function dial is set to dBm / V and you want to set the meter for ma�imum
sensiti�ity when measuring a new signal, press SELECT to select the ACV function
then press Hz / DUTY / WIDTH to select the frequency function.
• To change back to ACV measurement, press SELECT once then press SELECT again
to select the AC V display mode (dBm or �olts). press press SELECT twice to set the meter
back to the AC A measurement function.
• if the meter is set to measure current, it cannot measure the frequency of a signal with
DC bias.
Measuring
h
FE
You can use the meter to measure the DC gain of small-signal, bipolar transistors
in the
h
Fe range of 1000.
CAUTION : To a�oid damaging the meter, do not try to check a transistor if you do
not know its type and pinout.
1. Set the function dial to
h
FE
.
2. Unplug both test leads from the meter, then
slide down the guard on the front of the
meter.
3. insert the transistor you want to check into
the
h
FE
socket, matching the pinout of the
transistor with the labels on the socket. The
transistor’s �alue appears.
h
FE Socket - insert a transistor
to check gain.