Hameg Instruments HO870 Handbuch Seite 9

I n s e r t t h e I n t e r f a c e
Insert the Interface
An HM81xx instrument can be retrofi tted by the
user with the HO870 interface, but we recom-
mend to do it ex factory. The fi rst step is to remove
the instrument enclosure. To do so, unscrew the
6 screws on the rear panel of the instrument and
take off the plastic back cover; the enclosure can
then be pulled off towards the back.
Disconnect the cable, which connects the instru-
ment with the built-in interface, and attach it to
the HO870 interface.
Depending on the instrument's connector use the
micromatch connector or the MICS connector
. Remove the built-in interface. According to
the instrument, the jumpers have to be placed
in one of the following ways:
Jumper position 1
Instruments: HM8112-3 and HM7044
Jumper position 2
Instruments: HM8115-2, HM8118, HM8123,
HM8131-2, HM8134-3, HM8135, HM8143 and
HM8150
The interface card is attached using the 2 sup-
plied self-tapping screws. The enclosure is then
slid back on. When doing so make sure that the
edges of the metal enclosure slide exactly into
the grooves of the plastic covers on the front
and back. After the rear plastic cover has been
replaced and fastened, the unit is again ready
for operation.
All data and signal lines are electrically isolated
from ground.
9
Subject to change without notice