VXI 3002 manual Attenuator accuracy, Measuring

Attenuator accuracy

Test procedure

		Signal generator
UUT		RF OUTPUT
RF
OUT	RF	LO
		Down converter
	Frequency offset	Sensor
	mode connection
		Measuring
		receiver
		C2559

Fig. 5-2 RF output test set-up

(1)Connect the test equipment as shown in Fig. 5-2.

(2)On the UUT set:

Carr freq	2.6 MHz
RF Level	−4 dBm
Set ∆	11 ENTER

(3)Tune the receiver to 2.6 MHz and record the output level measured in Table 5-9 checking that the result is within specification.

(4)Set the UUT RF level to −4.1 dBm. Measure the received level and record the result in Table 5-9, checking that the result is within specification.

(5)Decrement the UUT, using the ￿ icon, in 11 dB steps down to an RF level of −103.1 dBm measuring the received level at each step shown in Table 5-9 checking that the results are within specification.

(6)Set the UUT to carrier frequency 480.1 MHz and repeat (2) to (5) using Table 5-10.

(7)Set the UUT to carrier frequency 1199 MHz and repeat (2) to (5) using Table 5-11.

The down converter will automatically be enabled when testing frequencies above 1300 MHz.

(8)Set the local oscillator to +8 dBm at a carrier frequency of 62 MHz less than the test frequency (i.e. 1813.1 MHz).

(9)On the receiver, enter the local oscillator frequency followed by the test frequency.

(10)Set the UUT to carrier frequency 1875.1 MHz and repeat (2) to (5) using Table 5-12.

(11)Set the UUT to carrier frequency 2399 MHz and repeat (2) to (5) using Table 5-13.

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