Available Addresses; To Display The Current Address; Ent Adrs; To Change The Address - HP 8642A Operating Manual

Operation Model 8642A/B
H P H B ADDRESS
The Signal Generator's address is set to 19 at the factory both in RAM memory and on an internal switch
located inside the instrument. You can change the address in RAM from the front panel.
The address stored in RAM remains valid through switching the Power from Standby to On and
unplugging of the ac power cord. However, if the internal battery power is lost, RAM memory is lost and
the Signal Generator reads the address on the internal switch. The internal switch address then becomes
the address at turn on. At any time, the instrument's HP-IB address can be displayed from the front
panel.
Available
Addresses Any address from 00 to 30 can be assigned to the instrument.
Setting an address of 31 establishes the Signal Generator as a listen-only device. The
listen-only mode causes the instrument to allow either HP-IB or local operation.
However, any keys pressed while the Signal Generator is receiving HP-IB information
could suspend the instrument in an unknown state. Also, with this address setting, the
HP-IB control lines should be left open-circuited: IFC, ATN, REN, SRQ, and EOI (Refer to
Figure 2 - 2 on page 2-7 for HP-IB connector pin numbers for these lines.)
To Display
the Current
Address From the front panel, select ENT ADRS ( fSRTFTI rTO~CAT~)
ENT ADRS
To Change
the Address
From the front panel, select ENT ADRS ( rSHIFTI (T~OCALn ), followed by a data entry
from 00 to 31, and rT-lZ""TJV~) (or any terminator).
The Signal Generator's internal switch address can also be changed using a procedure
described in Section VIII of the Service Manual in Service Sheet 2. However, this address
will only be used when Power is turned from Standby to On if the internal battery power
is lost.
WARNING
The setting of the switch that is described in Section VIII is
intended for service-trained persons who are aware of the
potential shock hazard of working on an instrument with
protective covers removed.
Comments System Control
Setting the address from the front panel when the instrument is in its service mode will
disable any activated HP-IB control capabilities. (Refer to the Service Manual for more
information about configuring the Signal Generator as a system controller to perform
various self-test and self-calibration routines.)
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