HP 3438A Operating And Service Manual page 11

Section I1 Model 3438A
HP-IB CONNECTOR 5701
CHASSIS/OUTGUARD
G R O U N D
0 0 0 0
a
r
,
D l 0 1-8 (Data I n p u t / O u t p u t l
Mnemonic referring t o the eight "Data Input/Output"
lines. The D l 0 lines transfer messages i n a byte-serial.
b i t parallel manner.
€ 0 1 ( E n d o r I d e n t i f y )
Mnemonic referring t o the "End or I d e n t i f y " c o n t r o l
line. € 0 1 is used b y a device t o indicate the end of a
multiple-byte transfer.
D A V (Data Validl
Mnemonic referring t o the "Data Valid" control line.
D A V is used t o coordinate the "handshake" sequence.
T ' i e D A V line is controlled b y the source (talker). When
D A V is true, data o n the D l 0 lines is considered valid.
N R F D ( N o t Ready F o r Datal
Mnemonic referring t o the "Ready F o r Data" c o n t r o l
line. N R F D is used t o coordinate the "handshake"
sequence. The N R F D line is controlled b y the acceptor
(Ilstener). When N R F D is true, the acceptor indicates t o
the source that he is ready t o accept data.
N D A C (Data N o t Accepted)
M n e m ~ n i c referring t o the "Data Accepted" control line.
N D A C is used t o coordinate the "handshake" sequence.
The N D A C line is controlled b y the acceptor (listener).
When N D A C i s true, the acceptor indicates t o the source
that the data o n the D l 0 lines has been accepted.
Mating Connector:
-np- Part No. 1251-0293
AmDnenol No. 57-30240
Mating Cables:
10631A 3 ft.
106318 6 ft.
10631C 12 ft.
the source that the data on the D l 0 lines has been
accepted.
I F C (Interface Clear)
Mnemonic referring t o the "Interface Clear" c o n t r o l line.
I F C is used t o place the HP-IB system i n a k n o w n quies-
cent state. The I F C line is controlled b y the system
controller.
S R Q (Service Request)
Not
Availablr in 3438A
Mnemonic referring t o the "Service Request" control
line. S R Q is used ( b y any device having service request
capability) t o indicate t o the system controller that the
device requires service. The controller responds b y polling
the devices t o determine w h i c h device requested service.
A T N ( A t t e n t i o n )
Mnemonic referring t o the "Attention" control line. The
state of the A T N line determines whether the HP-IB is i n
the "Command mode" ( A T N true) or the "Data mode"
( A T N false). When A T N is true, all devices must listen t o
the data lines. and when A T N is false, only devices that
have been addressed w i l l actively transfer data.
R E N (Remote Enable)
Mnemonic referring t o the "Remote Enable" control
line. R E N is used i n conjunction w i t h listen addresses
( D l 0 1-8) t o select either local or remote control o f each
device.
F o r further information concerning the HP-IB, refer t o
"Hewlett-Packard Interface, A Compendium of Technical
Articles" -hp- publications No. 5952-2472.
Figure 2-1. Hewlett-Packard Interface Bus Connector.
2-19. POWER CORDS AND RECEPTACLES.
2-20. Figure
2-2
illustrates the plug cap configurations
that are available to provide ac power to the Multimeter.
The -hp- part number shown directly below each plug cap
drawing is the part number for the power cord set
equipped with the appropriate mating plug for that
receptacle. The appropriate power cord should be
provided with each instrument. However, if a different
power cord set is required, notify the nearest -hp- Sales
and Service Office and a replacement cord will be
provided. The instrument ac power input receptacle and
cord set appliance coupler meet the safety specifications
set by the International Commission on Rules for the
Approval of Electrical Equipment (CEE 22).
8120-1351 812k1369 8120-1689
elm-1348
,TO
n - 4 m
.UL LISTED FOR USE IN THE UNITED STATESOF AMERICA
Figure 2-2. Power Receptacles.