Front Panel Controls And Indicators - HP 5340A Operating And Service Manual

Model 5340A
Operation
Figure 3-3. Front Panel Controls and Indicators (Continued)
N Type 500 Input Connector. Input for measurements in the 10 Hz to 18 GHz or
7.
250 MHz to 18 GHz range as determined by the RANGE switch. Sensitivity is
-30 dBm from 10 Hz to
8. RMT annunciator. For counters equipped with Option 011 only. Lights when
the counter is in remote operation.
9. DIR annunciator. Lights when counter is in direct measurement mode. (10 Hz
to 250 MHz.)
*
10. annunciator. Operative with Option 001 only. Lights when the oven is heating
to indicate oscillator is not stabilized. Full counter accuracy is obtained when the
oven has stabilized. Twenty minutes after turn on, additional oscillator error is
less than 5 parts in
longer periods of time.
At low environmental temperatures, e.g., O"C, the
remain on for longer periods of time. When the oven temperature stabli-
izes, it may continue to draw power in order to maintain operating
temperature.
11. OVFL annunciator. Indicates that one or more of the most significant digits
(digits left most from the decimal point) are not displayed. The digits that are
displayed will be accurate to within *1 count
example, if 123,456,789 Hz is measured with 1 Hz RESOLUTION selected, the
OVFL annunciator will light, the 1 will not be displayed, and the numbers
23456789 will be displayed and are valid.
12. LOCK annunciator.
ment is being made with the transfer oscillator technique.
13. GATE annunciator.
measurement is in progress.
16
3-6
500 MHz, -35 dBm from 500 MHz to 10 GHz and -25
at 25°C. If the line voltage is low, the
NOTE
Indicates that phase LOCK has occurred and a measure-
Indicates when the counter's main gate is open and a
*
may remain lit for
annunciator may
the time base accuracy. For