TB 9-6625-1098-35
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).
pertain to this calibration are listed in table 1.
Test instrument parameters
Performance specifications
Voltmeter range and accuracy
300 V range
2%, 30 Hz to 300 kHz
5%, 20 Hz to 500 kHz
1 mV to 30 V range
2%, 10 Hz to 1 MHz
5%, 5 Hz to 3 MHz
100 to 300 V range
2%, 10 Hz to 300 kHz
5%, 5 Hz to 500 kHz
High pass filter
(Hewlett-Packard Models 333A and 334A)
3 dB down at 400 Hz; 60 Hz rejection >40 dB
Low pass filter
(Hewlett-Packard Model 334A option 002)
3 dB down at 30 kHz; -23.6 dB at 60 kHz
Residual noise
<25 V rms with input shielded and
terminated with 600 Ω
Set level sensitivity
0.3 rms for 100% set level (up to 300 V may
be attenuated to set level reference)
Frequency calibration accuracy
5%, 5 Hz to 300 kHz
10%, 300 to 600 kHz
Second harmonic range and accuracy
5 to 20 Hz, >+1 dB
20 Hz to 20 kHz > 0.6 dB
20 to 100 kHz .-1 dB
100 to 300 kHz >-2 dB
300 to 600 kHz >-3 dB
Residual distortion1
>-70 dB, 5 Hz to 200 kHz
>-64 dB, 200 to 600 kHz
Automatic null
(Hewlett-Packard Models 333A and 334A)
0 to +3 dB from manual null (5 to 100 Hz)
0 to +1.5 dB from manual null (100 Hz to
600 kHz)
Fundamental frequency rejection
>80 dB
Implicitly calibrated during voltmeter residual noise calibration.
1
