Agilent Technologies HP 70910A Uživatelská příručka stáhnout pdf (Strana 110)

110 Chapter 4

Performance Tests

1. Conversion Loss

Performance Tests

CAUTION Turn off the ac power on the 8349B Amplifier prior to connecting or

disconnecting the source module interface cable.

Turn off the ac power on the 11974-60028 Preselector Power Supply when

either connecting or disconnecting the 11974 from it.

On the 11974 rear panel, set the instrument select switches to the

appropriate settings before applying power to the 11974.

8. Turn off the RF power on the synthesized sweeper and zero the 432A Power Meter.

9. Enter the appropriate millimeter-wave source module frequency multiplication factor

into the synthesized sweeper by pressing

SHIFT START FREQ and then press the

following keys (on the synthesized sweeper) for the appropriate band listed below:

for an 11974A:

2 Hz

for an 11974Q: 3 Hz

for an 11974U: 3 Hz

for an 11974V: 4 Hz

10.Set the synthesized sweeper for a CW signal at the frequency listed below:

for an 11974A: 26.5 GHz

for an 11974Q: 33.0 GHz

for an 11974U: 40.0 GHz

for an 11974V: 50.0 GHz

11.Set the synthesized sweeper frequency step to 500 MHz by pressing

SHIFT CF 500 MHz.

12.Activate external leveling on the synthesized sweeper by pressing

XTAL.

13.Adjust the output power of the synthesized sweeper for a reading of approximately

0 dBm on the 8349B display.

14.Set the spectrum analyzer to the appropriate millimeter band by using the appropriate

key sequence listed below:

for an 11974A:

SHIFT ⇑ ⇑

for an 11974Q: SHIFT ⇑ ⇑ ⇑

for an 11974U: SHIFT ⇑ ⇑ ⇑ ⇑

for an 11974V: SHIFT ⇑ ⇑ ⇑ ⇑ ⇑

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Agilent Technologies HP 70910A Uživatelská příručka Strana 110