TB 9-6625-2183-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Oscilloscope, Tektronix Type 305 DMM. The manufacturer's manual was
used as the prime data source in compiling these instructions. The equipment being
calibrated will be referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations: None.
b. Time and Technique. The time required for this calibration is approximately 3
hours, using the dc and low frequency technique.
2. Forms, Records, and Reports
a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables, the (R) follows the designated adjustment.
Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description
Test instrument
Performance specifications
parameters
Power source
Range: 90 to 132 V ac, 48 to 440 Hz, and
9 to 32 V dc
Vertical gain
Range: 5 mV/div to 10 V/div, 11 steps in a 1-2-5 sequence
Accuracy: 3%
Vertical low frequency
Less than 0.15 division compression or expansion of a 2
linearity
division signal at center screen when positioned
anywhere within the graticule area
Vertical bandwidth
Dc to at least 5 MHz (-3dB point) 4.5 MHz in Add Mode
(-3dB point)
Accuracy: 5 mV/div to 2 V/div within 3%
Compensation
5 V/div to 10 V/div within 5%
Vertical step
1.5 div or less
attenuator balance
At least 8 div from graticule center
Vertical position range
Calibrator
Range: 0.3 V p-p
Accuracy: 1%
