TB 9-6695-263-35
Table 1.
Calibration Description - Continued
Test instrument parameters
Performance specifications
AM calibration:
Specifications
Carrier frequency range
Internal reference
Frequency:
10 MHz
Stability
<1 x 10
-9 per day after 30- day warm-up
Audio filters:
50 Hz high pass (2 pole)
3 dB cutoff frequency
50 Hz nominal
<1% at >200 Hz rates
Flatness
300 Hz high pass (2 pole)
3 dB cutoff frequency
300 Hz nominal
<1%>kHz at rates
Flatness
3 kHz low pass (5 pole)
3 dB cutoff frequency
3 kHz nominal
Flatness
<1% at < kHz rates
15 kHz low pass (5 pole)
3 dB cutoff frequency
15 kHz nominal
Flatness
<1% at <10 kHz rates
20 kHz low pass (9 pole bessel)
3 dB cutoff frequency
>20 kHz
<1% at < kHz rates
Flatness
Dc-emphasis filters (1 pole
25 s nominal
high pass)
50 s nominal
75 s nominal
750 s nominal
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Reference Calibration
Standards Set, NSN 4931-00-621-7878. 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 exceed the minimum use
between the standard and TI. Where the four-to-one ratio cannot be met, the actual
accuracy of the equipment selected is shown in parenthesis.
usage accessories, issued as indicated in paragraph 4 above, and are not listed in this
calibration procedure.
