TB 9-6625-2072-24
equipment being calibrated will be referred to as the TI (test instrument) throughout this
bulletin.
a. Model Variations. Variations among models are described in text.
b. Time and Technique. The time required for this calibration is approximately 2
hours for each instrument, 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.
Test instrument
Performance specifications
parameters
180C and 180D
115 V ac 10%
Power input
requirement
Calibrator output
Range:
250 mV and 10 V p-p
Accuracy: 1%
Magnifier and
Range:
1 V/div X1; 0.2 V/div X5: 0.1 V/div X10
Accuracy: 5%
horizontal gain
Range:
dc to 5 MHz
Risetime
X1 mode: 7 ns or less
X5 mode: 18 ns or less (not on model 1801A)
Accuracy: Aberrations less than 3% of
displayed square wave
Attenuator
Range:
0.005 to 20 V/div
Accuracy: 3%
Time Base and Delay Generator; PL-1187/USM-281, PL-1187A/USM-281A,
and Hewlett-Packard, Model 1821A
0.1 to 1 s to 2 s/div (0.1 s to 1 s/div for model 1821A)
Main sweep time
Range:
Accuracy: 3%
0.1 to 50 s
Range:
Accuracy: 3%
0.1 s to 50 ms/div
Delayed sweep time
Range:
Accuracy: 3%
0.1 s to 10 s
Delay time
Range:
Accuracy: 1%
