TB 9-6625-2251-24
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
1. Test Instrument Identification.
calibration of Oscilloscope OS-291/G. Product description number CR-PD-0214-001 and TM
11-6625-3241-40 were used as the prime data sources 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 5
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
parameters
Performance specifications
Dc to 150 MHz
Cursors: Vertical and horizontal 1%
Delta time and cursors
Vertical
Vertical deflection: <2 mV div to 5 V div 2%
Horizontal
Trigger sensitivity: Sweep at 0.5 div p-p vertical deflection dc to 50 MHz
Internal:
1.5 div p-p vertical deflection at 150 MHz
Sweep at 50 mV p-p vertical deflection dc to 50 MHz,
External:
increasing to 150 mV p-p vertical deflection at 150 MHz
1st and 11th markers on 1st and 11th vertical graticule line,
Linearity:
markers in between to < 0.1 major division
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Sets AN/GSM-286, AN/GSM-287 or AN/GSM-705. Alternate items may be used
by the calibrating activity. The items selected must be verified to perform satisfactorily
prior to use and must bear evidence of current calibration. The equipment must meet or
