5080A
Getting Started Manual
22
Table 4. Front-Panel Features (cont.)
P
D
The divide by 10 key immediately changes the output to 1/10th reference value (not necessarily the
present output value) if the value is within performance limits.
Q
X
The multiply by 10 key immediately changes the output to 10X the reference value (not
necessarily the present output value) if the value is within performance limits. This key sets the
5080A to standby if this change is from a value <33 V to a value ≥33 V.
R
E
The ENTER key loads a newly entered output value shown on the Control Display into the 5080A,
which appears on the Output Display. The new value can come from the numeric keypad. If you
press ENTER without identifying the units for the entry, in most cases the 5080A keeps the units
that were last used. This allows you, for example, to enter 1 mV, and then later enter 10 to obtain
10 V. (The "V" units were saved from the last entry, but not the multiplier, "m".) In the Error (edit)
mode, ENTER with no value restores the output to the value of the reference.
S
Output Units Keys
The output units keys determine the function of the 5080A. Some keys have a second unit if the
SHIFT key is pressed just before the units key. The output units are as follows:
V Volts or Decibels relative to 1 mW into 600 ohms
(impedance changeable).
A Watts or amperes
Q Ohms
H Frequency or seconds
When a non-zero frequency (Hz) value is entered, the 5080A automatically switches to ac. When a
new signed (+ or −) output value is entered without specifying Hz, the 5080A automatically
switches back to dc (or enter “0” Hz to move back to volts dc).
T
b
The SHIFT key selects alternate functions of the units keys and alternate multipliers of the
multiplier keys. These alternate selections are labeled with small letters in the upper left hand
corner of the keys.
U
Multiplier Keys
Select output value multipliers. Some keys have a second function if the SHIFT key is pressed just
before the multiplier key. For example, if you enter 33, then SHIFT, then c, then V, then
ENTER, the 5080A output value is 33 μV. The multiplier keys are as follows:
c milli (10
-3
or 0.001) or micro (10
-6
or 0.000001)
K kilo (10
3
or 1,000) or nano (10
-9
or 0.000000001)
M mega (10
6
or 1,000,000) or giga (10
9
or 1,000,000,000)
V
Numeric Keypad
Used to enter the digits of the output amplitude and frequency. The proper sequence to enter a
value is to press the digits of the output value, a multiplier key (if necessary), an output units key,
then ENTER. For example, to obtain an output of 20 mV, press the following sequence of keys:
2, 0, c, and V. Press O to enable the output. Pressing a digit key once the entry field is
full, or pressing the decimal point key more than once in a single number, will sound the beeper.
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