Coupler

Coupler

Test

 

Multiplier

 

 

 

Port

 

 

 

RF

Wave

 

 

Source

 

 

 

Module

 

 

 

Multiplier

 

 

Local

 

 

 

Oscillator

 

 

 

 

Incident

 

Reflected

 

 

 

Local

 

 

 

Oscillator

 

 

 

 

 

Synchronous

 

 

 

Detector

 

Display

A/D Converter

CPU Serial Port

Figure 2. Site Master Block Diagram

4. FREQUENCY ACCURACY

The following test can be used to verify the CW fre- quency accuracy of the Site Master. Measurement calibration of the Site Master is not required for this test.

a.Equipment Required:

￿Spectrum Analyzer Anritsu Model MS2602A

b.Procedure:

1.Press and hold the ESCAPE/CLEAR key, then press the ON/OFF key to turn on the Site Master. (This sets the instrument to the factory preset state.)

NOTE

Before continuing, allow a five minute warm up for the internal circuitry to stabilize.

2.Press the FREQ soft key.

3.Press the F1 soft key, set to 9 GHz, then press the ENTER key.

4.Press the F2 soft key, set to 9 GHz, then press the ENTER key.

5.Connect the RF cable from the Site Mas- ter Test Port to the RF Input on the MS2602A.

6.Set up the Spectrum Analyzer as follows:

(a)Press Preset.

(b)Press Center and enter 1 GHz.

(c)Press the Max Hold button.

7.If the Site Master has gone into the hold mode, press the RUN/HOLD key to make the measurement.

8.Use the Spectrum Analyzer marker to measure the center of the response. The frequency should be 1 GHz ￿75 kHz.

NOTE

Nominal power is approximately 0 - 10 dBm at 1 GHz.

2

Site Master S820A MM

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Anritsu S820A manual Frequency Accuracy, Procedure