TB 9-6625-2143-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Selective Voltmeter, Hewlett-Packard, Model 3581C. 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 adjustments.
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
Frequency:
Range: 0 Hz to 50 kHz
Tracking oscillator
Accuracy: 1 Hz
3 Hz
Accuracy:
Display
Pull-in range: >5 times bandwidth for 3 through 100 Hz bandwidths
AFC
>800 Hz for 300 Hz bandwidth
Hold-in range: 800 Hz
Lock frequency: Center of passband 1 Hz
Range: 0 to 50 kHz in 11 steps
Span
Accuracy: 2% of setting
Range: 0.1 V to 30 V rms in 18 ranges and +30 to -70 dBV/dBm in
Input amplitude:
11 ranges
Accuracy: Volts scale 2%, log scale 2 dB
Display
Range: 0 to -70 dB
Accuracy: 1 dB
Range: 0.1 V to 30 V rms
Accuracy: 0.3 dB
Range: 15 Hz to 50 kHz
Accuracy: Volts scale 4%, log scale 0.4 dB