Agilent Technologies N8201A User Manual download pdf (Page 4)

Frequency reference (internal)

Accuracy ± [(time since last adjustment x aging rate) + temperature stability + calibration accuracy

]

Temperature stability 20 to 30 °C ± 1 x 10

-8

0 to 55 °C ± 5 x 10

-8

Aging rate ±1 x 10

-7

/year

±5 x 10

-10

/day (nominal)

Settability ±2 x 10

-9

Warm-up and retrace

300 s after turn on ±1 x 10

-7

of final frequency (nominal)

900 s after turn on ±5 x 10

-8

of final frequency (nominal)

Achievable initial calibration accuracy

±7 x 10

-8

Frequency accuracy

±(Input RF frequency x frequency reference accuracy)

IF output bandwidth (nominal)

IF output 3 dB bandwidth Center frequency

7.5 MHz 9.25 MHz 7.5 MHz

21.4 MHz 11 MHz 21.4 MHz

321.4 MHz

50 MHz to 3.045 GHz 100 MHz

300 MHz

3.045 to 26.5 GHz 40 to 80 MHz

321.4 MHz

Preselector bypassed (Option 123)

3.055 to 26.5 GHz 240 MHz 321.4 MHz

External mixing 240 MHz 321.4 MHz

1. Calibration accuracy depends on how accurately the frequency standard was adjusted to 10 MHz. If the calibration procedure is followed, the

calibration accuracy is given by the specification “Achievable initial calibration accuracy.”

2. For periods of one year or more.

3. Applies only when power is disconnected from instrument. Does not apply when instrument is in standby mode.

4. The achievable calibration accuracy at the beginning of the calibration cycle includes these effects:

a) The temperature difference between the calibration environment and the use environment

b) The orientation relative to the gravitation field changing between the calibration environment and the use environment

c) Retrace effects in both the calibration environment and the use environment due to unplugging the instrument

d) Settability

5. The IF bandwidth is 60 MHz if used at a center frequency of 321.4 MHz.

6. See figure above for nominal 4 dB IF bandwidth of preselector.

Nominal preselector bandwidth at –4 dB

vs center frequency

3 6 9 1215182124

Center frequency (GHz)

Bandwidth (MHz)

Figure 1. Nominal preselector bandwidth at –4 dB vs center frequency

1 2 3 4 5 6 7 8 9 ... 20 21

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