| 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 |