Tektronix DM 5010, Инструкция по эксплуатации

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Operating Instructions— DM 5010
After the ENTER button is pressed, the DM 5010 dis­
plays the stored constant value. The displayed value is the
new one if the entered value was valid. The previously-
stored value is displayed if the entered value was invalid.
Each constant value remains stored until a new value is
entered or until power is removed from the instrument.
Calculation Examples
The following examples are provided to suggest applica­
tions using the DM 5010 calculations.
Example 1: Using X-8/A to display the difference between
the nominal and actual zener voltages.
Set the DM 5010 front-panel controls as follows:
Connect the zener diode, resistor, and power supply to
the DM 5010 input connectors as shown in Fig. 2-5. The
value of the resistor and the power supply voltage set the
zener current.
The displayed voltage initially is unstable until the current
through the diode reaches its final value. When the display
stabilizes, the displayed voltage is the difference between
the nominal zener voltage (15 V) and the actual zener volt­
age for the zener diode being measured.
To read the voltage difference in percent deviation,
change constant A to .15 where A = B (.01).
Example 2: Using dBr to find the point where an audio am­
plifier is 3 dB down from mid-range.
DCV on
NULL off
LOW FREQ RESPONSE off
RANGE AUTO
TRIGGER MODE RUN
CONVERSION RATE FAST off
CALCULATIONS
X-B
A on
all others off
REAR INPUT off
Set the DM 5010 front-panel controls as follows:
ACV on
NULL off
LOW FREQ RESPONSE off
RANGE AUTO
TRIGGER MODE RUN
CONVERSION RATE FAST off
CALCULATIONS
off
REAR INPUT off
Set the constant A to 1.
Set the constant B to 15 (for a 15 V zener diode).
Set constant ref to 1. Connect a sinewave generator, the
audio amplifier, and the DM 5010 as shown in Fig. 2-6.
2994-05
Fig. 2-5. Setup for calculation example 1.
2-11