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Exterior Features
Rear Panel Features
Rear Panel Features
Figure 3-6
E6680A rear panel
Number
Item Name
1
Line power input
2
POWER SYNCH IN/OUT
3
FAN
4
INHIBIT
5
INHIBIT/VOLTAGE MON
6
10 MHz REF OUT
7
10 MHz REF IN
Getting Started Guide
Description
The AC power connection. See the product specifications for more details.
These multi-pin connectors are reserved for future use.
Fan speed control (settings are HIGH and AUTO).
Inhibit switch. The settings are DEF (default) and MAN (manual).
—When the switch is in the default position, the chassis is powered
up by the front panel ON/Standby pushbutton. This is the
recommended setting.
—When the switch is in the manual position, the chassis is powered
up by the Inhibit input signal on the rear panel INHIBIT/VOLTAGE
MON DB-9 connector.
This DB-9 connector provides access for testing of internal power supply
voltages. The voltages (by Pin #) are: (1) Logic Gnd, (2) +5 VDC, (3) Rsrvd, (4)
+3.3 VDC, (5) Inhibit [Low], (6) +12 VDC, (7) Rsrvd, (8) -12 VDC, (9) Logic Gnd.
This BNC connector is not used by the E6680A. The front panel 10 MHz OUT
connector should be used instead.
This BNC connector is not used by the E6680A. The front panel REF IN connector
should be used instead.
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