SECTION 6
6.1
REAR PANEL CONTROLS AND CONNECTORS
Fuse Protection
6.2
The power supply of the 9400A is protected against short circuits and
overload by means of a T(slow) 1.6/ 250 V fuse for units which can
operate on 220 V or 115 V mains voltage (switch selected) or a T (slow)
3.15/ 250 V fuse for units operating only on 115 V mains voltage. The
fuse is located under the 115 to 220 V mains voltage selector drum
cover.
Accessory Power Connectors (51)
Two LEMO RA 0304 NYL connectors have been provided to permit use of FET
type probes with the 9400A. These connectors provide output voltages of
+ 5 V, ± 15 V and GND connection, suitable for most FET probes.
The
maximum output current per connector must be limited to 150 mA for
each of the three voltages.
6.3
Battery Pack (52)
The battery pack consists of two KR 15/51, 1.2 V rechargeable NiCd
batteries enabling retention of front-panel setups for 6 months in case
of power failure or whenever the 9400A is switched off. The battery
pack is automatically recharged during operation.
The battery pack can be accessed by pressing the plastic latch at the
top of the cover and pulling it downward and toward the user.
6.4
GPIB and RS-232-C Port Selection (54)
The 9400A’s rear panel thumbwheel switch is used to set addresses for
programmed or remote oscilloscope operation. Any one of addresses 31-99
selects the RS-232-C port. Addresses 0-30 define the 9400A’s address
when using the optional GPIB (IEEE-488) port.
GPIB
and RS-232-C pin assignments are clearly indicated on the rear
panel next to each connector.
6-1
Rear Panel Controls and Connectors
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