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

Operation
Model 8642A/B
~
HP
-n~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 arldress stored in RAM remaim 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. fhe 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
To Display
the Current
Address
ENT ADRS
To Change
the Address
Comments
3-8
Any address from OD to 30 can be assigned to the instrument
Setting an address of
3 I
esta
bl
ishes the Signal Genera tor as a listen -only device. The
listen -only mode causes the inst
r
ument 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)
['rom the front panel, select ENT ADRS
([SHIFT] Q.OC::AC1)
From the [rUllt panel, select ENT ADRS (
[SRlfi-) [eoc!\(] ),
followed by a data entry
from DO to 31, and
CH-[UV)
(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 llsed when Power is turned from Standby to On if the internal battery power
is lost.
The setting of the switch that is described in Section VIn is
intended for service-trained persons who are a\vare of the
potentJal shock hazard of working on an instrument with
protective covers removed
System Control
Setting the address from the front panel when the instI1lment IS
III
its service mode will
(hsable any activated HP-IB conirol 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.)