OPERATING STATUS
The operating status of the counter
is
indicated by a series of LEDs. When the counter
is
displaying input
data, instead of a measurement, the appropriate LED status indicator will flash.
REMOTE lights to indicate that front panel controls are disabled, and that the counter
is
being
controlled by the
GPlB option (08), or by the BCDIRemote Programming option (07).
EXT REF lights to indicate the counter is set to an external time base reference.
CAUTION
When EXT REF lights it dces NOT
indicate that correct signal level
has been applied.
dBm lights to indicate that the Power Meter option (02)
is
active.
FRO LMT, LOWIHIGH 'lights when frequency limits for Band
3
operation have been selected.
OFFSET, PWRIFRQ lights when power andlor frequency offsets are stored in the counter memory.
Band 1, 2,
3,
41,42, 43, 44 light to indicate which operating range has been selected. When any
Band 4 annunciator
is
lit it indicates that the Extended Frequency Capability option (06) has been
selected (Available on 548A only).
DAC lights to indicate that the Digital-to-Analog Converter option 01
is
active.
MLT lights to indicate the multiplier function is active.
POWER
METERIDAC OPTION KEYBOARD
Four keys control the operation of these options.
ONIOFF push button activatesldeactivates power meter.
OFFSET push button activates the power offset function.
dB pushbutton acts
as
a terminator for the input of power offsets.
DAC pushbutton, followed by two digits (00-12). activates the DAC option. The number keyed
in will select the most significant digit (00
=
OFF, 01
=
1 Hz, 12
=
10 GHz).
Scans by ArtekMedia © 2007
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