Operating instructions

ACCEPTANCE TESTING

5-25

(8) Disconnect the external reference from the UUT and connect an external reference with an

accuracy of 1 part in 10

or better to the RF signal generator.

(9) Refer to Results table 5-31 on page 5-41. Set the RF signal generator to provide a frequency

of 1000 M

Hz at a level of 0 dBm.

(10) Check that the UUT indicates a frequency between 999.999750 MHz and

1000.000250 MHz. The test limits in this step are for guidance and assume that the internal

frequency standard has been recently adjusted. Ageing and stability have to be considered

when establishing the real test limits.