VXI 3002 manual Pulse modulation RF level frequency response, Pulse modulation test set-up

Pulse modulation

Does not apply to instruments fitted with Option 11 — refer to Annex A.

Specification

Carrier frequency range		32 MHz to 2.4 GHz, usable to 10 MHz.
RF level range		Maximum guaranteed output is reduced to +20 dBm, +14 dBm above 1.2 GHz.
RF level accuracy		When pulse modulation is enabled, adds ±0.5 dB to the RF level accuracy.
ON/OFF ratio		Better than 45 dB below 1.2 GHz.
		Better than 40 dB above 1.2 GHz.
Rise and fall time			∝
		Less than 10 s.
Test equipment
	Description		Minimum specification	Example
	Power meter		±0.1 dB from 9 kHz to 2.4 GHz	IFR 6960B and
				6912
	Spectrum analyzer		Frequency coverage 32 MHz to 2.4 GHz	Anritsu MS2602A
	Oscilloscope		100 MHz bandwidth	Tektronix TDS 220
	Function generator		DC to 10 kHz square wave	Agilent 3325B

Pulse modulation RF level frequency response

Fig. 5-10 Pulse modulation test set-up

Test procedure

(1)Perform AUTO ZERO and AUTO CAL on the power meter.

(2)Connect the test equipment as shown in Fig. 5-10.

(3)On the UUT set:

Carr Freq	32 MHz
RF Level	−7 dBm
Pulse ON

(4)Set the function generator to provide +5 V DC. The RF output will now be enabled.

(5)Record the output level measured by the power meter against each of the carrier frequencies shown in Table 5-38 checking that the results are within specification.

(6)Set the UUT RF level to +4 dBm and repeat (5) using Table 5-39.

5-18