Measuring Ampifier Type 2525
User Manual Vol.2
Brüel & Kjær
2–2
Chapter 2 – The IEEE – 488 Interface
Interface Specifications
2.1 Interface Specifications
2.1.1 Interface Functions Implemented
The amplifier interface implements the following functions as specified in IEEE Std
488.1 –1987: “IEEE Standard Digital Interface for Programmable Instrumentation”.
The sections referred to are the relevant sections of the IEEE standard. The equiva-
lent clauses of IEC Publication 625–1 are given in parentheses.
Section 2.3: Source Handshake (SH) Interface Function (Clause 6) SH1 –
complete compatibility
Section 2.4: Acceptor Handshake (AH) Interface Function (Clause 7) AH 1 –
complete compatibility
Section 2.5: Talker (T) Interface Function (Clause 8) T6 – No Talk Only mode
Section 2.6: Listener (L) Interface Function (Clause 9) L4 – No Listener Only
mode
Section 2.8: Remote/Local (RL) Interface Function (Clause 11) RL1 – Com-
plete Compatibility
Section 2.10: Device Clear (DC) Interface Function (Clause 13) DC1 – Com-
plete Compatibility
For further details regarding the specifications for the above mentioned functions
refer to the relevant sections of the IEEE or IEC standards.
2.1.2 Interface Connections
Up to 15 devices can be interconnected in an IEEE–488 bus system. The maximum
permitted cable length of the bus is 2 metres (6ft) × the number of instruments in
the system, up to a 20metre (60ft) maximum. Also, it is recommended that cable
lengths between individual instruments connected to the bus be no greater than
4metres (12ft).
The IEEE interface connector of the 2525 is a 24-way female “micro-ribbon” as
specified in IEEE Std 488. The amplifier can be connected to other instruments fitted
with this type of connector using the 2m long Brüel&Kjær IEEE Interface Cable,
AO0265. Cable AO0265 has screw-locking stackable connectors, allowing a number
of connections to be made at the same point during system interconnection.
Brüel&Kjær also supply cables and adaptors for interface bus connections to instru-
ments fitted with the older IEC-625 standard connector (Brüel&Kjær part nos.
AO0264 and AO0195).
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