Specifications - HP 59501B Operating And Service Manual

SECTION I
GENERAL INFORMATION
1-1 INTRODUCTION
1-2 This instruction manual contains operating and
service instructions for the HP-IB Isolated D/A Power
Supply Programmer Model 59501B,. Installation instructions
and sample programs are also provided. The 59501B
allows HP power supplies to be digitally controlled via
the Hewlett-Packard interface Bus (HP-IB) from a calculator,
computer, or other controller. The digital format is bit
parallel, byte serial, ASCII coded format. The 59501B
can also be used on the HP-IB as a digitally programmable
low level dc signal source. Since the 59501 B! can be
controlled (programmed) by various control devices such
as HP 9800 desk-top computers, hereafter in this manual,
the controlling device will be referred to as the "con¬
troller", except when specific programming examples are
provided.
1-3 DESCRIPTION
1-4 The 59501B'. is basically a digital-to-analog (D/A)
converter that provides an output voltage in response to
digital data received on the HP-IB. Two programmable
output ranges (IV and 10V) are available. In addition, a
switch on the rear panel allows selecting either a unipolar or
bipolar output mode. The unipolar mode provides a 0 to
,999V or a 0 to 9.99V output range and the bipolar mode
provides a —IV to +0.998V or a —10V to +9.98V output
range. The 59501 B's output can be used as a programming
voltage for controlling a wide range of dc voltages and
currents from HP power supplies or as a source voltage for
testing electronic components such as integrated circuit
packages (IC's).
1-5 Isolators within the 59501B protect other instru¬
mentation on the HP-IB from damage that could be caused
by power supply outputs. Also, an internal circuit ensures
that the output is held near zero until programmed data is
received. Power supply programming is accomplished
through use of the 59501 B's programmable output voltage
and its front panel adjustments. By making the appropriate
connections between the 59501 B's rear terminals and the
programming terminals on the supply, the output voltage
(or current, if available) of the power supply can be
programmed from zero to its full rated output. The
59501 B's front panel adjustments provide fast and easy cali¬
bration of power supply outputs. The ZERO ADJUST
enables the user to correct for small offsets in power supply
response to programmed inputs. The POWER SUPPLY
FULL SCALE ADJUSTMENT (COARSE and FINE)
allows the user to set the maximum output desired from the
power supply when the 59501B is programmed touts
maximum output. This method of programming is called
voltage programming with gain. Power supply program¬
ming is described in greater detail in Section III.
1-6 Programming the 59501B is accomplished through
the transmission of four consecutive digits (four ASCII
characters). The first digit specifies output range and the
next three digits specify the magnitude within the selected
range. The high/low range capability provides a ten to one
improvement in resolution. Internal conversion circuitry
enables the 59501B to produce its maximum output voltage
in approximately 250^sec from the time the digital data
is received. Output current up to 10 milliamps is available
and is automatically limited to protect the 59501B and
the user equipment.
1-7 HP-iB CAPABILITIES
1-8 The 59501B has'listener" and "acceptor hand¬
shake" HP-IB functional capabilities. The LISTENING
indicator on the front panel provides a convenient means of
monitoring the 59501 B's operating status. The 59501B
does not have: controller, talker, source handshake, service
request, device trigger, extended listener, extended talker,
parallel poll, and remote/local HP-IB functional capabilities.
All HP-IB functional capabilities are described in IEEE
Standard 488-1975.
1-9 SPECIFICATIONS
1-10 Detailed specifications for the 59501B are given
in Table 1-1.
1-11 ACCESSORIES
1-12 The System-11 cabinet accessories listed below may
be ordered with the 59501B unit or separately from your
local Hewlett-Packard field sales office (refer to list at rear
of manual for addresses). All accessories applicable to
System-11 modular cabinets are fully described and illustrated
in the Hewlett-Packard Electronic Instruments and Systems
catalog.
1-1