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With Manual arm spacing selected, the instrument will
wait until the front panel STEP key is pressed. With
GPIB arm spacing selected, the instrument will wait
until a bus trigger (GET or *TRG) is received. With Ex-
ternal arm spacing selected, the instrument will wait
until an input trigger (via EXTERNAL TRIGGER con-
nector on rear panel) is received. With Trigger Link arm
spacing selected, the instrument will wait until an in-
put trigger is received (via TRIGGER LINK).
After all other scanning operations are completed, the
instrument can be returned to the arm layer by
programming the instrument for additional arms. The
arm count can be set to a finite value (1 to 9999) or to
infinity.
After the instrument leaves the arm layer, operation
proceeds into the scan layer.
Scan layer
In general, the instrument requires a scan event to al-
low operation to proceed to the channel layer. With Im-
mediate scan spacing selected, operation immediately
proceeds to the next layer. With one of the trigger scan
spacing events selected (Timer, External, GPIB, Manu-
al, Trigger Link), the instrument will wait until the ap-
propriate event occurs. With Timer scan spacing
selected, the first pass through the scan layer will occur
immediately. If programmed for additional scans, the
instrument will wait until the Timer times out. The
Timer can be set for an interval from 1msec to
99999.999 seconds.
The scan count (number of scans) can be set to a finite
value (1 to 9999) or for an infinite number of scans.
After the instrument leaves the scan layer, operation
proceeds into the channel layer.
Channel layer
In general, channel events control the channel scan
rate. With Immediate channel spacing selected, a chan-
nel will be scanned immediately. With one of the other
channel spacing events selected (Timer, External, GPIB,
Manual or Trigger Link), the instrument will wait until
the appropriate event occurs before scanning a chan-
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nel. With Timer channel spacing selected, the first
channel will be scanned immediately. Each additional
channel will wait for the Timer to time out before it will
be scanned.
Typically, the channel count (number of channels to
scan) is set to the number of channels that are con-
tained in the Scan List (scan-list-length). However, the
channel count can be set to a finite value (1 to 9999) or
to infinity.
3.5
Initial configuration
WARNING
Before turning the Model 7001 on,
make sure it is connected to a
grounded power receptacle using the
supplied power cord or the equiva-
lent. Failure to properly ground the
unit creates a shock hazard that could
result in injury or death.
Before performing any basic operations (close/open
channels or scan channels) there are a few initial con-
figurations that must first be considered. If you are us-
ing Model 701X series cards (i.e. Model 7011, 7012 and
7013), and they are already installed in the mainframe
(as explained in Section 2), skip the following configu-
ration information and proceed to paragraphs 3.5
(front panel operation) and 3.6 (IEEE-488 bus opera-
tion).
3.5.1 Switching card simulators
Instrument operation can be performed without any
switching cards installed in the Model 7001 by using
the switching card simulators. By selecting the appro-
priate switching card simulator, the Model 7001 will
operate as if a 40-channel switching card or a 4 × 10 ma-
trix card were installed. This is useful if you want to de-
velop a test program without having a card installed.
When a slot is assigned the model number 9990, the
mainframe will operate as if a 40-channel switching
card is installed. When a slot is assigned model number
9991, the mainframe will operate as if a 4 × 10 matrix
Getting Started
3-11
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